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openldap/libraries/libldap/tls_m.c
Quanah Gibson-Mount 1705fa7e55 Happy New Year
2015-02-11 15:36:57 -06:00

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/* tls_m.c - Handle tls/ssl using Mozilla NSS. */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2008-2015 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* ACKNOWLEDGEMENTS: Initial version written by Howard Chu.
* Additional support by Rich Megginson.
*/
#include "portable.h"
#ifdef HAVE_MOZNSS
#include "ldap_config.h"
#include <stdio.h>
#if defined( HAVE_FCNTL_H )
#include <fcntl.h>
#endif
#include <ac/stdlib.h>
#include <ac/errno.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/ctype.h>
#include <ac/time.h>
#include <ac/unistd.h>
#include <ac/param.h>
#include <ac/dirent.h>
#include "ldap-int.h"
#include "ldap-tls.h"
#define READ_PASSWORD_FROM_STDIN
#define READ_PASSWORD_FROM_FILE
#ifdef READ_PASSWORD_FROM_STDIN
#include <termios.h> /* for echo on/off */
#endif
#include <nspr/nspr.h>
#include <nspr/private/pprio.h>
#include <nss/nss.h>
#include <nss/ssl.h>
#include <nss/sslerr.h>
#include <nss/sslproto.h>
#include <nss/pk11pub.h>
#include <nss/secerr.h>
#include <nss/keyhi.h>
#include <nss/secmod.h>
#include <nss/cert.h>
#undef NSS_VERSION_INT
#define NSS_VERSION_INT ((NSS_VMAJOR << 24) | (NSS_VMINOR << 16) | \
(NSS_VPATCH << 8) | NSS_VBUILD)
/* NSS 3.12.5 and later have NSS_InitContext */
#if NSS_VERSION_INT >= 0x030c0500
#define HAVE_NSS_INITCONTEXT 1
#endif
/* NSS 3.12.9 and later have SECMOD_RestartModules */
#if NSS_VERSION_INT >= 0x030c0900
#define HAVE_SECMOD_RESTARTMODULES 1
#endif
/* InitContext does not currently work in server mode */
/* #define INITCONTEXT_HACK 1 */
typedef struct tlsm_ctx {
PRFileDesc *tc_model;
int tc_refcnt;
int tc_unique; /* unique number associated with this ctx */
PRBool tc_verify_cert;
CERTCertDBHandle *tc_certdb;
PK11SlotInfo *tc_certdb_slot;
CERTCertificate *tc_certificate;
SECKEYPrivateKey *tc_private_key;
char *tc_pin_file;
struct ldaptls *tc_config;
int tc_is_server;
int tc_require_cert;
PRCallOnceType tc_callonce;
PRBool tc_using_pem;
#ifdef HAVE_NSS_INITCONTEXT
NSSInitContext *tc_initctx; /* the NSS context */
#endif
PK11GenericObject **tc_pem_objs; /* array of objects to free */
int tc_n_pem_objs; /* number of objects */
PRBool tc_warn_only; /* only warn of errors in validation */
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_t tc_refmutex;
#endif
} tlsm_ctx;
typedef PRFileDesc tlsm_session;
static int tlsm_ctx_count;
#define TLSM_CERTDB_DESC_FMT "ldap(%d)"
static PRDescIdentity tlsm_layer_id;
static const PRIOMethods tlsm_PR_methods;
#define CERTDB_NONE NULL
#define PREFIX_NONE NULL
#define PEM_LIBRARY "nsspem"
#define PEM_MODULE "PEM"
/* hash files for use with cacertdir have this file name suffix */
#define PEM_CA_HASH_FILE_SUFFIX ".0"
#define PEM_CA_HASH_FILE_SUFFIX_LEN 2
static SECMODModule *pem_module;
#define DEFAULT_TOKEN_NAME "default"
#define TLSM_PEM_SLOT_CACERTS "PEM Token #0"
#define TLSM_PEM_SLOT_CERTS "PEM Token #1"
#define PK11_SETATTRS(x,id,v,l) (x).type = (id); \
(x).pValue=(v); (x).ulValueLen = (l);
/* forward declaration */
static int tlsm_init( void );
#ifdef LDAP_R_COMPILE
/* it doesn't seem guaranteed that a client will call
tlsm_thr_init in a non-threaded context - so we have
to wrap the mutex creation in a prcallonce
*/
static ldap_pvt_thread_mutex_t tlsm_ctx_count_mutex;
static ldap_pvt_thread_mutex_t tlsm_init_mutex;
static ldap_pvt_thread_mutex_t tlsm_pem_mutex;
static PRCallOnceType tlsm_init_mutex_callonce = {0,0};
static PRStatus PR_CALLBACK
tlsm_thr_init_callonce( void )
{
if ( ldap_pvt_thread_mutex_init( &tlsm_ctx_count_mutex ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not create mutex for context counter: %d\n", errno, 0, 0 );
return PR_FAILURE;
}
if ( ldap_pvt_thread_mutex_init( &tlsm_init_mutex ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not create mutex for moznss initialization: %d\n", errno, 0, 0 );
return PR_FAILURE;
}
if ( ldap_pvt_thread_mutex_init( &tlsm_pem_mutex ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not create mutex for PEM module: %d\n", errno, 0, 0 );
return PR_FAILURE;
}
return PR_SUCCESS;
}
static void
tlsm_thr_init( void )
{
( void )PR_CallOnce( &tlsm_init_mutex_callonce, tlsm_thr_init_callonce );
}
#endif /* LDAP_R_COMPILE */
static const char *
tlsm_dump_cipher_info(PRFileDesc *fd)
{
PRUint16 ii;
for (ii = 0; ii < SSL_NumImplementedCiphers; ++ii) {
PRInt32 cipher = (PRInt32)SSL_ImplementedCiphers[ii];
PRBool enabled = PR_FALSE;
PRInt32 policy = 0;
SSLCipherSuiteInfo info;
if (fd) {
SSL_CipherPrefGet(fd, cipher, &enabled);
} else {
SSL_CipherPrefGetDefault(cipher, &enabled);
}
SSL_CipherPolicyGet(cipher, &policy);
SSL_GetCipherSuiteInfo(cipher, &info, (PRUintn)sizeof(info));
Debug( LDAP_DEBUG_TRACE,
"TLS: cipher: %d - %s, enabled: %d, ",
info.cipherSuite, info.cipherSuiteName, enabled );
Debug( LDAP_DEBUG_TRACE,
"policy: %d\n", policy, 0, 0 );
}
return "";
}
/* Cipher definitions */
typedef struct {
char *ossl_name; /* The OpenSSL cipher name */
int num; /* The cipher id */
int attr; /* cipher attributes: algorithms, etc */
int version; /* protocol version valid for this cipher */
int bits; /* bits of strength */
int alg_bits; /* bits of the algorithm */
int strength; /* LOW, MEDIUM, HIGH */
int enabled; /* Enabled by default? */
} cipher_properties;
/* cipher attributes */
#define SSL_kRSA 0x00000001L
#define SSL_aRSA 0x00000002L
#define SSL_aDSS 0x00000004L
#define SSL_DSS SSL_aDSS
#define SSL_eNULL 0x00000008L
#define SSL_DES 0x00000010L
#define SSL_3DES 0x00000020L
#define SSL_RC4 0x00000040L
#define SSL_RC2 0x00000080L
#define SSL_AES 0x00000100L
#define SSL_MD5 0x00000200L
#define SSL_SHA1 0x00000400L
#define SSL_SHA SSL_SHA1
#define SSL_RSA (SSL_kRSA|SSL_aRSA)
/* cipher strength */
#define SSL_NULL 0x00000001L
#define SSL_EXPORT40 0x00000002L
#define SSL_EXPORT56 0x00000004L
#define SSL_LOW 0x00000008L
#define SSL_MEDIUM 0x00000010L
#define SSL_HIGH 0x00000020L
#define SSL2 0x00000001L
#define SSL3 0x00000002L
/* OpenSSL treats SSL3 and TLSv1 the same */
#define TLS1 SSL3
/* Cipher translation */
static cipher_properties ciphers_def[] = {
/* SSL 2 ciphers */
{"DES-CBC3-MD5", SSL_EN_DES_192_EDE3_CBC_WITH_MD5, SSL_kRSA|SSL_aRSA|SSL_3DES|SSL_MD5, SSL2, 168, 168, SSL_HIGH, SSL_ALLOWED},
{"RC2-CBC-MD5", SSL_EN_RC2_128_CBC_WITH_MD5, SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5, SSL2, 128, 128, SSL_MEDIUM, SSL_ALLOWED},
{"RC4-MD5", SSL_EN_RC4_128_WITH_MD5, SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5, SSL2, 128, 128, SSL_MEDIUM, SSL_ALLOWED},
{"DES-CBC-MD5", SSL_EN_DES_64_CBC_WITH_MD5, SSL_kRSA|SSL_aRSA|SSL_DES|SSL_MD5, SSL2, 56, 56, SSL_LOW, SSL_ALLOWED},
{"EXP-RC2-CBC-MD5", SSL_EN_RC2_128_CBC_EXPORT40_WITH_MD5, SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5, SSL2, 40, 128, SSL_EXPORT40, SSL_ALLOWED},
{"EXP-RC4-MD5", SSL_EN_RC4_128_EXPORT40_WITH_MD5, SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5, SSL2, 40, 128, SSL_EXPORT40, SSL_ALLOWED},
/* SSL3 ciphers */
{"RC4-MD5", SSL_RSA_WITH_RC4_128_MD5, SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5, SSL3, 128, 128, SSL_MEDIUM, SSL_ALLOWED},
{"RC4-SHA", SSL_RSA_WITH_RC4_128_SHA, SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_SHA1, SSL3, 128, 128, SSL_MEDIUM, SSL_ALLOWED},
{"DES-CBC3-SHA", SSL_RSA_WITH_3DES_EDE_CBC_SHA, SSL_kRSA|SSL_aRSA|SSL_3DES|SSL_SHA1, SSL3, 168, 168, SSL_HIGH, SSL_ALLOWED},
{"DES-CBC-SHA", SSL_RSA_WITH_DES_CBC_SHA, SSL_kRSA|SSL_aRSA|SSL_DES|SSL_SHA1, SSL3, 56, 56, SSL_LOW, SSL_ALLOWED},
{"EXP-RC4-MD5", SSL_RSA_EXPORT_WITH_RC4_40_MD5, SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5, SSL3, 40, 128, SSL_EXPORT40, SSL_ALLOWED},
{"EXP-RC2-CBC-MD5", SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5, SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5, SSL3, 0, 0, SSL_EXPORT40, SSL_ALLOWED},
{"NULL-MD5", SSL_RSA_WITH_NULL_MD5, SSL_kRSA|SSL_aRSA|SSL_eNULL|SSL_MD5, SSL3, 0, 0, SSL_NULL, SSL_NOT_ALLOWED},
{"NULL-SHA", SSL_RSA_WITH_NULL_SHA, SSL_kRSA|SSL_aRSA|SSL_eNULL|SSL_SHA1, SSL3, 0, 0, SSL_NULL, SSL_NOT_ALLOWED},
/* TLSv1 ciphers */
{"EXP1024-DES-CBC-SHA", TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA, SSL_kRSA|SSL_aRSA|SSL_DES|SSL_SHA, TLS1, 56, 56, SSL_EXPORT56, SSL_ALLOWED},
{"EXP1024-RC4-SHA", TLS_RSA_EXPORT1024_WITH_RC4_56_SHA, SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_SHA, TLS1, 56, 56, SSL_EXPORT56, SSL_ALLOWED},
{"AES128-SHA", TLS_RSA_WITH_AES_128_CBC_SHA, SSL_kRSA|SSL_aRSA|SSL_AES|SSL_SHA, TLS1, 128, 128, SSL_HIGH, SSL_ALLOWED},
{"AES256-SHA", TLS_RSA_WITH_AES_256_CBC_SHA, SSL_kRSA|SSL_aRSA|SSL_AES|SSL_SHA, TLS1, 256, 256, SSL_HIGH, SSL_ALLOWED},
};
#define ciphernum (sizeof(ciphers_def)/sizeof(cipher_properties))
/* given err which is the current errno, calls PR_SetError with
the corresponding NSPR error code */
static void
tlsm_map_error(int err)
{
PRErrorCode prError;
switch ( err ) {
case EACCES:
prError = PR_NO_ACCESS_RIGHTS_ERROR;
break;
case EADDRINUSE:
prError = PR_ADDRESS_IN_USE_ERROR;
break;
case EADDRNOTAVAIL:
prError = PR_ADDRESS_NOT_AVAILABLE_ERROR;
break;
case EAFNOSUPPORT:
prError = PR_ADDRESS_NOT_SUPPORTED_ERROR;
break;
case EAGAIN:
prError = PR_WOULD_BLOCK_ERROR;
break;
/*
* On QNX and Neutrino, EALREADY is defined as EBUSY.
*/
#if EALREADY != EBUSY
case EALREADY:
prError = PR_ALREADY_INITIATED_ERROR;
break;
#endif
case EBADF:
prError = PR_BAD_DESCRIPTOR_ERROR;
break;
#ifdef EBADMSG
case EBADMSG:
prError = PR_IO_ERROR;
break;
#endif
case EBUSY:
prError = PR_FILESYSTEM_MOUNTED_ERROR;
break;
case ECONNABORTED:
prError = PR_CONNECT_ABORTED_ERROR;
break;
case ECONNREFUSED:
prError = PR_CONNECT_REFUSED_ERROR;
break;
case ECONNRESET:
prError = PR_CONNECT_RESET_ERROR;
break;
case EDEADLK:
prError = PR_DEADLOCK_ERROR;
break;
#ifdef EDIRCORRUPTED
case EDIRCORRUPTED:
prError = PR_DIRECTORY_CORRUPTED_ERROR;
break;
#endif
#ifdef EDQUOT
case EDQUOT:
prError = PR_NO_DEVICE_SPACE_ERROR;
break;
#endif
case EEXIST:
prError = PR_FILE_EXISTS_ERROR;
break;
case EFAULT:
prError = PR_ACCESS_FAULT_ERROR;
break;
case EFBIG:
prError = PR_FILE_TOO_BIG_ERROR;
break;
case EHOSTUNREACH:
prError = PR_HOST_UNREACHABLE_ERROR;
break;
case EINPROGRESS:
prError = PR_IN_PROGRESS_ERROR;
break;
case EINTR:
prError = PR_PENDING_INTERRUPT_ERROR;
break;
case EINVAL:
prError = PR_INVALID_ARGUMENT_ERROR;
break;
case EIO:
prError = PR_IO_ERROR;
break;
case EISCONN:
prError = PR_IS_CONNECTED_ERROR;
break;
case EISDIR:
prError = PR_IS_DIRECTORY_ERROR;
break;
case ELOOP:
prError = PR_LOOP_ERROR;
break;
case EMFILE:
prError = PR_PROC_DESC_TABLE_FULL_ERROR;
break;
case EMLINK:
prError = PR_MAX_DIRECTORY_ENTRIES_ERROR;
break;
case EMSGSIZE:
prError = PR_INVALID_ARGUMENT_ERROR;
break;
#ifdef EMULTIHOP
case EMULTIHOP:
prError = PR_REMOTE_FILE_ERROR;
break;
#endif
case ENAMETOOLONG:
prError = PR_NAME_TOO_LONG_ERROR;
break;
case ENETUNREACH:
prError = PR_NETWORK_UNREACHABLE_ERROR;
break;
case ENFILE:
prError = PR_SYS_DESC_TABLE_FULL_ERROR;
break;
/*
* On SCO OpenServer 5, ENOBUFS is defined as ENOSR.
*/
#if defined(ENOBUFS) && (ENOBUFS != ENOSR)
case ENOBUFS:
prError = PR_INSUFFICIENT_RESOURCES_ERROR;
break;
#endif
case ENODEV:
prError = PR_FILE_NOT_FOUND_ERROR;
break;
case ENOENT:
prError = PR_FILE_NOT_FOUND_ERROR;
break;
case ENOLCK:
prError = PR_FILE_IS_LOCKED_ERROR;
break;
#ifdef ENOLINK
case ENOLINK:
prError = PR_REMOTE_FILE_ERROR;
break;
#endif
case ENOMEM:
prError = PR_OUT_OF_MEMORY_ERROR;
break;
case ENOPROTOOPT:
prError = PR_INVALID_ARGUMENT_ERROR;
break;
case ENOSPC:
prError = PR_NO_DEVICE_SPACE_ERROR;
break;
#ifdef ENOSR
case ENOSR:
prError = PR_INSUFFICIENT_RESOURCES_ERROR;
break;
#endif
case ENOTCONN:
prError = PR_NOT_CONNECTED_ERROR;
break;
case ENOTDIR:
prError = PR_NOT_DIRECTORY_ERROR;
break;
case ENOTSOCK:
prError = PR_NOT_SOCKET_ERROR;
break;
case ENXIO:
prError = PR_FILE_NOT_FOUND_ERROR;
break;
case EOPNOTSUPP:
prError = PR_NOT_TCP_SOCKET_ERROR;
break;
#ifdef EOVERFLOW
case EOVERFLOW:
prError = PR_BUFFER_OVERFLOW_ERROR;
break;
#endif
case EPERM:
prError = PR_NO_ACCESS_RIGHTS_ERROR;
break;
case EPIPE:
prError = PR_CONNECT_RESET_ERROR;
break;
#ifdef EPROTO
case EPROTO:
prError = PR_IO_ERROR;
break;
#endif
case EPROTONOSUPPORT:
prError = PR_PROTOCOL_NOT_SUPPORTED_ERROR;
break;
case EPROTOTYPE:
prError = PR_ADDRESS_NOT_SUPPORTED_ERROR;
break;
case ERANGE:
prError = PR_INVALID_METHOD_ERROR;
break;
case EROFS:
prError = PR_READ_ONLY_FILESYSTEM_ERROR;
break;
case ESPIPE:
prError = PR_INVALID_METHOD_ERROR;
break;
case ETIMEDOUT:
prError = PR_IO_TIMEOUT_ERROR;
break;
#if EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
prError = PR_WOULD_BLOCK_ERROR;
break;
#endif
case EXDEV:
prError = PR_NOT_SAME_DEVICE_ERROR;
break;
default:
prError = PR_UNKNOWN_ERROR;
break;
}
PR_SetError( prError, err );
}
/*
* cipher_list is an integer array with the following values:
* -1: never enable this cipher
* 0: cipher disabled
* 1: cipher enabled
*/
static int
nss_parse_ciphers(const char *cipherstr, int cipher_list[ciphernum])
{
int i;
char *cipher;
char *ciphers;
char *ciphertip;
int action;
int rv;
/* All disabled to start */
for (i=0; i<ciphernum; i++)
cipher_list[i] = 0;
ciphertip = strdup(cipherstr);
cipher = ciphers = ciphertip;
while (ciphers && (strlen(ciphers))) {
while ((*cipher) && (isspace(*cipher)))
++cipher;
action = 1;
switch(*cipher) {
case '+': /* Add something */
action = 1;
cipher++;
break;
case '-': /* Subtract something */
action = 0;
cipher++;
break;
case '!': /* Disable something */
action = -1;
cipher++;
break;
default:
/* do nothing */
break;
}
if ((ciphers = strchr(cipher, ':'))) {
*ciphers++ = '\0';
}
/* Do the easy one first */
if (!strcmp(cipher, "ALL")) {
for (i=0; i<ciphernum; i++) {
if (!(ciphers_def[i].attr & SSL_eNULL))
cipher_list[i] = action;
}
} else if (!strcmp(cipher, "COMPLEMENTOFALL")) {
for (i=0; i<ciphernum; i++) {
if ((ciphers_def[i].attr & SSL_eNULL))
cipher_list[i] = action;
}
} else if (!strcmp(cipher, "DEFAULT")) {
for (i=0; i<ciphernum; i++) {
cipher_list[i] = ciphers_def[i].enabled == SSL_ALLOWED ? 1 : 0;
}
} else {
int mask = 0;
int strength = 0;
int protocol = 0;
char *c;
c = cipher;
while (c && (strlen(c))) {
if ((c = strchr(cipher, '+'))) {
*c++ = '\0';
}
if (!strcmp(cipher, "RSA")) {
mask |= SSL_RSA;
} else if ((!strcmp(cipher, "NULL")) || (!strcmp(cipher, "eNULL"))) {
mask |= SSL_eNULL;
} else if (!strcmp(cipher, "AES")) {
mask |= SSL_AES;
} else if (!strcmp(cipher, "3DES")) {
mask |= SSL_3DES;
} else if (!strcmp(cipher, "DES")) {
mask |= SSL_DES;
} else if (!strcmp(cipher, "RC4")) {
mask |= SSL_RC4;
} else if (!strcmp(cipher, "RC2")) {
mask |= SSL_RC2;
} else if (!strcmp(cipher, "MD5")) {
mask |= SSL_MD5;
} else if ((!strcmp(cipher, "SHA")) || (!strcmp(cipher, "SHA1"))) {
mask |= SSL_SHA1;
} else if (!strcmp(cipher, "SSLv2")) {
protocol |= SSL2;
} else if (!strcmp(cipher, "SSLv3")) {
protocol |= SSL3;
} else if (!strcmp(cipher, "TLSv1")) {
protocol |= TLS1;
} else if (!strcmp(cipher, "HIGH")) {
strength |= SSL_HIGH;
} else if (!strcmp(cipher, "MEDIUM")) {
strength |= SSL_MEDIUM;
} else if (!strcmp(cipher, "LOW")) {
strength |= SSL_LOW;
} else if ((!strcmp(cipher, "EXPORT")) || (!strcmp(cipher, "EXP"))) {
strength |= SSL_EXPORT40|SSL_EXPORT56;
} else if (!strcmp(cipher, "EXPORT40")) {
strength |= SSL_EXPORT40;
} else if (!strcmp(cipher, "EXPORT56")) {
strength |= SSL_EXPORT56;
}
if (c)
cipher = c;
} /* while */
/* If we have a mask, apply it. If not then perhaps they provided
* a specific cipher to enable.
*/
if (mask || strength || protocol) {
for (i=0; i<ciphernum; i++) {
if (((ciphers_def[i].attr & mask) ||
(ciphers_def[i].strength & strength) ||
(ciphers_def[i].version & protocol)) &&
(cipher_list[i] != -1)) {
/* Enable the NULL ciphers only if explicity
* requested */
if (ciphers_def[i].attr & SSL_eNULL) {
if (mask & SSL_eNULL)
cipher_list[i] = action;
} else
cipher_list[i] = action;
}
}
} else {
for (i=0; i<ciphernum; i++) {
if (!strcmp(ciphers_def[i].ossl_name, cipher) &&
cipher_list[i] != -1)
cipher_list[i] = action;
}
}
}
if (ciphers)
cipher = ciphers;
}
/* See if any ciphers were enabled */
rv = 0;
for (i=0; i<ciphernum; i++) {
if (cipher_list[i] == 1)
rv = 1;
}
free(ciphertip);
return rv;
}
static int
tlsm_parse_ciphers(tlsm_ctx *ctx, const char *str)
{
int cipher_state[ciphernum];
int rv, i;
if (!ctx)
return 0;
rv = nss_parse_ciphers(str, cipher_state);
if (rv) {
/* First disable everything */
for (i = 0; i < SSL_NumImplementedCiphers; i++)
SSL_CipherPrefSet(ctx->tc_model, SSL_ImplementedCiphers[i], SSL_NOT_ALLOWED);
/* Now enable what was requested */
for (i=0; i<ciphernum; i++) {
SSLCipherSuiteInfo suite;
PRBool enabled;
if (SSL_GetCipherSuiteInfo(ciphers_def[i].num, &suite, sizeof suite)
== SECSuccess) {
enabled = cipher_state[i] < 0 ? 0 : cipher_state[i];
if (enabled == SSL_ALLOWED) {
if (PK11_IsFIPS() && !suite.isFIPS)
enabled = SSL_NOT_ALLOWED;
}
SSL_CipherPrefSet(ctx->tc_model, ciphers_def[i].num, enabled);
}
}
}
return rv == 1 ? 0 : -1;
}
static SECStatus
tlsm_bad_cert_handler(void *arg, PRFileDesc *ssl)
{
SECStatus success = SECSuccess;
PRErrorCode err;
tlsm_ctx *ctx = (tlsm_ctx *)arg;
if (!ssl || !ctx) {
return SECFailure;
}
err = PORT_GetError();
switch (err) {
case SEC_ERROR_UNTRUSTED_ISSUER:
case SEC_ERROR_UNKNOWN_ISSUER:
case SEC_ERROR_EXPIRED_CERTIFICATE:
case SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE:
if (ctx->tc_verify_cert) {
success = SECFailure;
}
break;
/* we bypass NSS's hostname checks and do our own */
case SSL_ERROR_BAD_CERT_DOMAIN:
break;
default:
success = SECFailure;
break;
}
return success;
}
static const char *
tlsm_dump_security_status(PRFileDesc *fd)
{
char * cp; /* bulk cipher name */
char * ip; /* cert issuer DN */
char * sp; /* cert subject DN */
int op; /* High, Low, Off */
int kp0; /* total key bits */
int kp1; /* secret key bits */
SSL3Statistics * ssl3stats = SSL_GetStatistics();
SSL_SecurityStatus( fd, &op, &cp, &kp0, &kp1, &ip, &sp );
Debug( LDAP_DEBUG_TRACE,
"TLS certificate verification: subject: %s, issuer: %s, cipher: %s, ",
sp ? sp : "-unknown-", ip ? ip : "-unknown-", cp ? cp : "-unknown-" );
PR_Free(cp);
PR_Free(ip);
PR_Free(sp);
Debug( LDAP_DEBUG_TRACE,
"security level: %s, secret key bits: %d, total key bits: %d, ",
((op == SSL_SECURITY_STATUS_ON_HIGH) ? "high" :
((op == SSL_SECURITY_STATUS_ON_LOW) ? "low" : "off")),
kp1, kp0 );
Debug( LDAP_DEBUG_TRACE,
"cache hits: %ld, cache misses: %ld, cache not reusable: %ld\n",
ssl3stats->hch_sid_cache_hits, ssl3stats->hch_sid_cache_misses,
ssl3stats->hch_sid_cache_not_ok );
return "";
}
static void
tlsm_handshake_complete_cb( PRFileDesc *fd, void *client_data )
{
tlsm_dump_security_status( fd );
}
#ifdef READ_PASSWORD_FROM_FILE
static char *
tlsm_get_pin_from_file(const char *token_name, tlsm_ctx *ctx)
{
char *pwdstr = NULL;
char *contents = NULL;
char *lasts = NULL;
char *line = NULL;
char *candidate = NULL;
PRFileInfo file_info;
PRFileDesc *pwd_fileptr = PR_Open( ctx->tc_pin_file, PR_RDONLY, 00400 );
/* open the password file */
if ( !pwd_fileptr ) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not open security pin file %s - error %d:%s.\n",
ctx->tc_pin_file, errcode,
PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
goto done;
}
/* get the file size */
if ( PR_SUCCESS != PR_GetFileInfo( ctx->tc_pin_file, &file_info ) ) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not get file info from pin file %s - error %d:%s.\n",
ctx->tc_pin_file, errcode,
PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
goto done;
}
/* create a buffer to hold the file contents */
if ( !( contents = PR_CALLOC( file_info.size + 1 ) ) ) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not alloc a buffer for contents of pin file %s - error %d:%s.\n",
ctx->tc_pin_file, errcode,
PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
goto done;
}
/* read file into the buffer */
if( PR_Read( pwd_fileptr, contents, file_info.size ) <= 0 ) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not read the file contents from pin file %s - error %d:%s.\n",
ctx->tc_pin_file, errcode,
PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
goto done;
}
/* format is [tokenname:]password EOL [tokenname:]password EOL ... */
/* if you want to use a password containing a colon character, use
the special tokenname "default" */
for ( line = PL_strtok_r( contents, "\r\n", &lasts ); line;
line = PL_strtok_r( NULL, "\r\n", &lasts ) ) {
char *colon;
if ( !*line ) {
continue; /* skip blank lines */
}
colon = PL_strchr( line, ':' );
if ( colon ) {
if ( *(colon + 1) && token_name &&
!PL_strncmp( token_name, line, colon-line ) ) {
candidate = colon + 1; /* found a definite match */
break;
} else if ( !PL_strncmp( DEFAULT_TOKEN_NAME, line, colon-line ) ) {
candidate = colon + 1; /* found possible match */
}
} else { /* no token name */
candidate = line;
}
}
done:
if ( pwd_fileptr ) {
PR_Close( pwd_fileptr );
}
if ( candidate ) {
pwdstr = PL_strdup( candidate );
}
PL_strfree( contents );
return pwdstr;
}
#endif /* READ_PASSWORD_FROM_FILE */
#ifdef READ_PASSWORD_FROM_STDIN
/*
* Turn the echoing off on a tty.
*/
static void
echoOff(int fd)
{
if ( isatty( fd ) ) {
struct termios tio;
tcgetattr( fd, &tio );
tio.c_lflag &= ~ECHO;
tcsetattr( fd, TCSAFLUSH, &tio );
}
}
/*
* Turn the echoing on on a tty.
*/
static void
echoOn(int fd)
{
if ( isatty( fd ) ) {
struct termios tio;
tcgetattr( fd, &tio );
tio.c_lflag |= ECHO;
tcsetattr( fd, TCSAFLUSH, &tio );
tcsetattr( fd, TCSAFLUSH, &tio );
}
}
#endif /* READ_PASSWORD_FROM_STDIN */
/*
* This does the actual work of reading the pin/password/pass phrase
*/
static char *
tlsm_get_pin(PK11SlotInfo *slot, PRBool retry, tlsm_ctx *ctx)
{
char *token_name = NULL;
char *pwdstr = NULL;
token_name = PK11_GetTokenName( slot );
#ifdef READ_PASSWORD_FROM_FILE
/* Try to get the passwords from the password file if it exists.
* THIS IS UNSAFE and is provided for convenience only. Without this
* capability the server would have to be started in foreground mode
* if using an encrypted key.
*/
if ( ctx && ctx->tc_pin_file ) {
pwdstr = tlsm_get_pin_from_file( token_name, ctx );
if ( retry && pwdstr != NULL )
return NULL;
}
#endif /* RETRIEVE_PASSWORD_FROM_FILE */
#ifdef READ_PASSWORD_FROM_STDIN
if ( !pwdstr ) {
int infd = PR_FileDesc2NativeHandle( PR_STDIN );
int isTTY = isatty( infd );
unsigned char phrase[200];
char *dummy;
/* Prompt for password */
if ( isTTY ) {
fprintf( stdout,
"Please enter pin, password, or pass phrase for security token '%s': ",
token_name ? token_name : DEFAULT_TOKEN_NAME );
echoOff( infd );
}
dummy = fgets( (char*)phrase, sizeof(phrase), stdin );
(void) dummy;
if ( isTTY ) {
fprintf( stdout, "\n" );
echoOn( infd );
}
/* stomp on newline */
phrase[strlen((char*)phrase)-1] = 0;
pwdstr = PL_strdup( (char*)phrase );
}
#endif /* READ_PASSWORD_FROM_STDIN */
return pwdstr;
}
/*
* PKCS11 devices (including the internal softokn cert/key database)
* may be protected by a pin or password or even pass phrase
* MozNSS needs a way for the user to provide that
*/
static char *
tlsm_pin_prompt(PK11SlotInfo *slot, PRBool retry, void *arg)
{
tlsm_ctx *ctx = (tlsm_ctx *)arg;
return tlsm_get_pin( slot, retry, ctx );
}
static char *
tlsm_ctx_subject_name(tlsm_ctx *ctx)
{
if ( !ctx || !ctx->tc_certificate )
return "(unknown)";
return ctx->tc_certificate->subjectName;
}
static SECStatus
tlsm_get_basic_constraint_extension( CERTCertificate *cert,
CERTBasicConstraints *cbcval )
{
SECItem encodedVal = { 0, NULL };
SECStatus rc;
rc = CERT_FindCertExtension( cert, SEC_OID_X509_BASIC_CONSTRAINTS,
&encodedVal);
if ( rc != SECSuccess ) {
return rc;
}
rc = CERT_DecodeBasicConstraintValue( cbcval, &encodedVal );
/* free the raw extension data */
PORT_Free( encodedVal.data );
return rc;
}
static PRBool
tlsm_cert_is_self_issued( CERTCertificate *cert )
{
/* A cert is self-issued if its subject and issuer are equal and
* both are of non-zero length.
*/
PRBool is_self_issued = cert &&
(PRBool)SECITEM_ItemsAreEqual( &cert->derIssuer,
&cert->derSubject ) &&
cert->derSubject.len > 0;
return is_self_issued;
}
/*
* The private key for used certificate can be already unlocked by other
* thread or library. Find the unlocked key if possible.
*/
static SECKEYPrivateKey *
tlsm_find_unlocked_key( tlsm_ctx *ctx, void *pin_arg )
{
SECKEYPrivateKey *result = NULL;
PK11SlotList *slots = PK11_GetAllSlotsForCert( ctx->tc_certificate, NULL );
if ( !slots ) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: cannot get all slots for certificate '%s' (error %d: %s)",
tlsm_ctx_subject_name( ctx ), errcode,
PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
return result;
}
PK11SlotListElement *le;
for ( le = slots->head; le; le = le->next ) {
PK11SlotInfo *slot = le->slot;
if ( PK11_IsLoggedIn( slot, NULL ) ) {
result = PK11_FindKeyByDERCert( slot, ctx->tc_certificate, pin_arg );
break;
}
}
PK11_FreeSlotList( slots );
return result;
}
static SECStatus
tlsm_verify_cert(CERTCertDBHandle *handle, CERTCertificate *cert, void *pinarg,
PRBool checksig, SECCertificateUsage certUsage, PRBool warn_only,
PRBool ignore_issuer )
{
CERTVerifyLog verifylog;
SECStatus ret = SECSuccess;
const char *name;
int debug_level = LDAP_DEBUG_ANY;
if ( warn_only ) {
debug_level = LDAP_DEBUG_TRACE;
}
/* the log captures information about every cert in the chain, so we can tell
which cert caused the problem and what the problem was */
memset( &verifylog, 0, sizeof( verifylog ) );
verifylog.arena = PORT_NewArena( DER_DEFAULT_CHUNKSIZE );
if ( verifylog.arena == NULL ) {
Debug( LDAP_DEBUG_ANY,
"TLS certificate verification: Out of memory for certificate verification logger\n",
0, 0, 0 );
return SECFailure;
}
ret = CERT_VerifyCertificate( handle, cert, checksig, certUsage, PR_Now(), pinarg, &verifylog,
NULL );
if ( ( name = cert->subjectName ) == NULL ) {
name = cert->nickname;
}
if ( verifylog.head == NULL ) {
/* it is possible for CERT_VerifyCertificate return with an error with no logging */
if ( ret != SECSuccess ) {
PRErrorCode errcode = PR_GetError();
Debug( debug_level,
"TLS: certificate [%s] is not valid - error %d:%s.\n",
name ? name : "(unknown)",
errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
}
} else {
const char *name;
CERTVerifyLogNode *node;
ret = SECSuccess; /* reset */
node = verifylog.head;
while ( node ) {
if ( ( name = node->cert->subjectName ) == NULL ) {
name = node->cert->nickname;
}
if ( node->error ) {
/* NSS does not like CA certs that have the basic constraints extension
with the CA flag set to FALSE - openssl doesn't check if the cert
is self issued */
if ( ( node->error == SEC_ERROR_CA_CERT_INVALID ) &&
tlsm_cert_is_self_issued( node->cert ) ) {
PRErrorCode orig_error = PR_GetError();
PRInt32 orig_oserror = PR_GetOSError();
CERTBasicConstraints basicConstraint;
SECStatus rv = tlsm_get_basic_constraint_extension( node->cert, &basicConstraint );
if ( ( rv == SECSuccess ) && ( basicConstraint.isCA == PR_FALSE ) ) {
Debug( LDAP_DEBUG_TRACE,
"TLS: certificate [%s] is not correct because it is a CA cert and the "
"BasicConstraint CA flag is set to FALSE - allowing for now, but "
"please fix your certs if possible\n", name, 0, 0 );
} else { /* does not have basicconstraint, or some other error */
ret = SECFailure;
Debug( debug_level,
"TLS: certificate [%s] is not valid - CA cert is not valid\n",
name, 0, 0 );
}
PR_SetError( orig_error, orig_oserror );
} else if ( warn_only || ( ignore_issuer && (
node->error == SEC_ERROR_UNKNOWN_ISSUER ||
node->error == SEC_ERROR_UNTRUSTED_ISSUER )
) ) {
ret = SECSuccess;
Debug( debug_level,
"TLS: Warning: ignoring error for certificate [%s] - error %ld:%s.\n",
name, node->error, PR_ErrorToString( node->error, PR_LANGUAGE_I_DEFAULT ) );
} else {
ret = SECFailure;
Debug( debug_level,
"TLS: certificate [%s] is not valid - error %ld:%s.\n",
name, node->error, PR_ErrorToString( node->error, PR_LANGUAGE_I_DEFAULT ) );
}
}
CERT_DestroyCertificate( node->cert );
node = node->next;
}
}
PORT_FreeArena( verifylog.arena, PR_FALSE );
if ( ret == SECSuccess ) {
Debug( LDAP_DEBUG_TRACE,
"TLS: certificate [%s] is valid\n", name, 0, 0 );
}
return ret;
}
static SECStatus
tlsm_auth_cert_handler(void *arg, PRFileDesc *fd,
PRBool checksig, PRBool isServer)
{
SECCertificateUsage certUsage = isServer ? certificateUsageSSLClient : certificateUsageSSLServer;
SECStatus ret = SECSuccess;
CERTCertificate *peercert = SSL_PeerCertificate( fd );
tlsm_ctx *ctx = (tlsm_ctx *)arg;
ret = tlsm_verify_cert( ctx->tc_certdb, peercert,
SSL_RevealPinArg( fd ),
checksig, certUsage, ctx->tc_warn_only, PR_FALSE );
CERT_DestroyCertificate( peercert );
return ret;
}
static SECStatus
tlsm_nss_shutdown_cb( void *appData, void *nssData )
{
SECStatus rc = SECSuccess;
SSL_ShutdownServerSessionIDCache();
if ( pem_module ) {
SECMOD_UnloadUserModule( pem_module );
SECMOD_DestroyModule( pem_module );
pem_module = NULL;
}
return rc;
}
static PRCallOnceType tlsm_register_shutdown_callonce = {0,0};
static PRStatus PR_CALLBACK
tlsm_register_nss_shutdown_cb( void )
{
if ( SECSuccess == NSS_RegisterShutdown( tlsm_nss_shutdown_cb,
NULL ) ) {
return PR_SUCCESS;
}
return PR_FAILURE;
}
static PRStatus
tlsm_register_nss_shutdown( void )
{
return PR_CallOnce( &tlsm_register_shutdown_callonce,
tlsm_register_nss_shutdown_cb );
}
static int
tlsm_init_pem_module( void )
{
int rc = 0;
char *fullname = NULL;
char *configstring = NULL;
if ( pem_module ) {
return rc;
}
/* not loaded - load it */
/* get the system dependent library name */
fullname = PR_GetLibraryName( NULL, PEM_LIBRARY );
/* Load our PKCS#11 module */
configstring = PR_smprintf( "library=%s name=" PEM_MODULE " parameters=\"\"", fullname );
PL_strfree( fullname );
pem_module = SECMOD_LoadUserModule( configstring, NULL, PR_FALSE );
PR_smprintf_free( configstring );
if ( !pem_module || !pem_module->loaded ) {
if ( pem_module ) {
SECMOD_DestroyModule( pem_module );
pem_module = NULL;
}
rc = -1;
}
return rc;
}
static void
tlsm_add_pem_obj( tlsm_ctx *ctx, PK11GenericObject *obj )
{
int idx = ctx->tc_n_pem_objs;
ctx->tc_n_pem_objs++;
ctx->tc_pem_objs = (PK11GenericObject **)
PORT_Realloc( ctx->tc_pem_objs, ctx->tc_n_pem_objs * sizeof( PK11GenericObject * ) );
ctx->tc_pem_objs[idx] = obj;
}
static void
tlsm_free_pem_objs( tlsm_ctx *ctx )
{
/* free in reverse order of allocation */
while ( ctx->tc_n_pem_objs-- ) {
PK11_DestroyGenericObject( ctx->tc_pem_objs[ctx->tc_n_pem_objs] );
ctx->tc_pem_objs[ctx->tc_n_pem_objs] = NULL;
}
PORT_Free(ctx->tc_pem_objs);
ctx->tc_pem_objs = NULL;
ctx->tc_n_pem_objs = 0;
}
static int
tlsm_add_cert_from_file( tlsm_ctx *ctx, const char *filename, PRBool isca )
{
PK11SlotInfo *slot;
PK11GenericObject *cert;
CK_ATTRIBUTE attrs[4];
CK_BBOOL cktrue = CK_TRUE;
CK_BBOOL ckfalse = CK_FALSE;
CK_OBJECT_CLASS objClass = CKO_CERTIFICATE;
char *slotname;
PRFileInfo fi;
PRStatus status;
SECItem certDER = { 0, NULL, 0 };
memset( &fi, 0, sizeof(fi) );
status = PR_GetFileInfo( filename, &fi );
if ( PR_SUCCESS != status) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not read certificate file %s - error %d:%s.\n",
filename, errcode,
PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
return -1;
}
if ( fi.type != PR_FILE_FILE ) {
PR_SetError(PR_IS_DIRECTORY_ERROR, 0);
Debug( LDAP_DEBUG_ANY,
"TLS: error: the certificate file %s is not a file.\n",
filename, 0 ,0 );
return -1;
}
slotname = isca ? TLSM_PEM_SLOT_CACERTS : TLSM_PEM_SLOT_CERTS;
slot = PK11_FindSlotByName( slotname );
if ( !slot ) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not find the slot for the certificate '%s' - error %d:%s.\n",
filename, errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
return -1;
}
PK11_SETATTRS( attrs[0], CKA_CLASS, &objClass, sizeof( objClass ) );
PK11_SETATTRS( attrs[1], CKA_TOKEN, &cktrue, sizeof( CK_BBOOL ) );
PK11_SETATTRS( attrs[2], CKA_LABEL, (unsigned char *) filename, strlen( filename ) + 1 );
PK11_SETATTRS( attrs[3], CKA_TRUST, isca ? &cktrue : &ckfalse, sizeof( CK_BBOOL ) );
cert = PK11_CreateGenericObject( slot, attrs, 4, PR_FALSE /* isPerm */ );
if ( !cert ) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not add the certificate '%s' - error %d:%s.\n",
filename, errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
PK11_FreeSlot( slot );
return -1;
}
/* if not CA, we store the certificate in ctx->tc_certificate */
if ( !isca ) {
if ( PK11_ReadRawAttribute( PK11_TypeGeneric, cert, CKA_VALUE, &certDER ) != SECSuccess ) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not get DER of the '%s' certificate - error %d:%s.\n",
filename, errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
PK11_DestroyGenericObject( cert );
PK11_FreeSlot( slot );
return -1;
}
ctx->tc_certificate = PK11_FindCertFromDERCertItem( slot, &certDER, NULL );
SECITEM_FreeItem( &certDER, PR_FALSE );
if ( !ctx->tc_certificate ) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not get certificate '%s' using DER - error %d:%s.\n",
filename, errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
PK11_DestroyGenericObject( cert );
PK11_FreeSlot( slot );
return -1;
}
}
tlsm_add_pem_obj( ctx, cert );
PK11_FreeSlot( slot );
return 0;
}
static int
tlsm_ctx_load_private_key( tlsm_ctx *ctx )
{
if ( !ctx->tc_certificate )
return -1;
if ( ctx->tc_private_key )
return 0;
void *pin_arg = SSL_RevealPinArg( ctx->tc_model );
SECKEYPrivateKey *unlocked_key = tlsm_find_unlocked_key( ctx, pin_arg );
Debug( LDAP_DEBUG_ANY,
"TLS: %s unlocked certificate for certificate '%s'.\n",
unlocked_key ? "found" : "no", tlsm_ctx_subject_name( ctx ), 0 );
/* prefer unlocked key, then key from opened certdb, then any other */
if ( unlocked_key )
ctx->tc_private_key = unlocked_key;
else if ( ctx->tc_certdb_slot )
ctx->tc_private_key = PK11_FindKeyByDERCert( ctx->tc_certdb_slot, ctx->tc_certificate, pin_arg );
else
ctx->tc_private_key = PK11_FindKeyByAnyCert( ctx->tc_certificate, pin_arg );
if ( !ctx->tc_private_key ) {
PRErrorCode errcode = PR_GetError();
Debug(LDAP_DEBUG_ANY,
"TLS: cannot find private key for certificate '%s' (error %d: %s)",
tlsm_ctx_subject_name( ctx ), errcode,
PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
return -1;
}
return 0;
}
static int
tlsm_add_key_from_file( tlsm_ctx *ctx, const char *filename )
{
PK11SlotInfo * slot = NULL;
PK11GenericObject *key;
CK_ATTRIBUTE attrs[3];
CK_BBOOL cktrue = CK_TRUE;
CK_OBJECT_CLASS objClass = CKO_PRIVATE_KEY;
int retcode = 0;
PRFileInfo fi;
PRStatus status;
memset( &fi, 0, sizeof(fi) );
status = PR_GetFileInfo( filename, &fi );
if ( PR_SUCCESS != status) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not read key file %s - error %d:%s.\n",
filename, errcode,
PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
return -1;
}
if ( fi.type != PR_FILE_FILE ) {
PR_SetError(PR_IS_DIRECTORY_ERROR, 0);
Debug( LDAP_DEBUG_ANY,
"TLS: error: the key file %s is not a file.\n",
filename, 0 ,0 );
return -1;
}
slot = PK11_FindSlotByName( TLSM_PEM_SLOT_CERTS );
if ( !slot ) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not find the slot for the private key '%s' - error %d:%s.\n",
filename, errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
return -1;
}
PK11_SETATTRS( attrs[0], CKA_CLASS, &objClass, sizeof( objClass ) );
PK11_SETATTRS( attrs[1], CKA_TOKEN, &cktrue, sizeof( CK_BBOOL ) );
PK11_SETATTRS( attrs[2], CKA_LABEL, (unsigned char *)filename, strlen( filename ) + 1 );
key = PK11_CreateGenericObject( slot, attrs, 3, PR_FALSE /* isPerm */ );
if ( !key ) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not add the private key '%s' - error %d:%s.\n",
filename, errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
retcode = -1;
} else {
tlsm_add_pem_obj( ctx, key );
retcode = 0;
/* When adding an encrypted key the PKCS#11 will be set as removed */
/* This will force the token to be seen as re-inserted */
SECMOD_WaitForAnyTokenEvent( pem_module, 0, 0 );
PK11_IsPresent( slot );
}
PK11_FreeSlot( slot );
return retcode;
}
static int
tlsm_init_ca_certs( tlsm_ctx *ctx, const char *cacertfile, const char *cacertdir )
{
PRBool isca = PR_TRUE;
PRStatus status = PR_SUCCESS;
PRErrorCode errcode = PR_SUCCESS;
if ( !cacertfile && !cacertdir ) {
/* no checking - not good, but allowed */
return 0;
}
if ( cacertfile ) {
int rc = tlsm_add_cert_from_file( ctx, cacertfile, isca );
if ( rc ) {
errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: %s is not a valid CA certificate file - error %d:%s.\n",
cacertfile, errcode,
PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
/* failure with cacertfile is a hard failure even if cacertdir is
also specified and contains valid CA cert files */
status = PR_FAILURE;
} else {
Debug( LDAP_DEBUG_TRACE,
"TLS: loaded CA certificate file %s.\n",
cacertfile, 0, 0 );
}
}
/* if cacertfile above failed, we will return failure, even
if there is a valid CA cert in cacertdir - but we still
process cacertdir in case the user has enabled trace level
debugging so they can see the processing for cacertdir too */
/* any cacertdir failures are "soft" failures - if the user specifies
no cert checking, then we allow the tls/ssl to continue, no matter
what was specified for cacertdir, or the contents of the directory
- this is different behavior than that of cacertfile */
if ( cacertdir ) {
PRFileInfo fi;
PRDir *dir;
PRDirEntry *entry;
PRStatus fistatus = PR_FAILURE;
memset( &fi, 0, sizeof(fi) );
fistatus = PR_GetFileInfo( cacertdir, &fi );
if ( PR_SUCCESS != fistatus) {
errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not get info about the CA certificate directory %s - error %d:%s.\n",
cacertdir, errcode,
PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
goto done;
}
if ( fi.type != PR_FILE_DIRECTORY ) {
Debug( LDAP_DEBUG_ANY,
"TLS: error: the CA certificate directory %s is not a directory.\n",
cacertdir, 0 ,0 );
goto done;
}
dir = PR_OpenDir( cacertdir );
if ( NULL == dir ) {
errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not open the CA certificate directory %s - error %d:%s.\n",
cacertdir, errcode,
PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
goto done;
}
do {
entry = PR_ReadDir( dir, PR_SKIP_BOTH | PR_SKIP_HIDDEN );
if ( ( NULL != entry ) && ( NULL != entry->name ) ) {
char *fullpath = NULL;
char *ptr;
ptr = PL_strrstr( entry->name, PEM_CA_HASH_FILE_SUFFIX );
if ( ( ptr == NULL ) || ( *(ptr + PEM_CA_HASH_FILE_SUFFIX_LEN) != '\0' ) ) {
Debug( LDAP_DEBUG_TRACE,
"TLS: file %s does not end in [%s] - does not appear to be a CA certificate "
"directory file with a properly hashed file name - skipping.\n",
entry->name, PEM_CA_HASH_FILE_SUFFIX, 0 );
continue;
}
fullpath = PR_smprintf( "%s/%s", cacertdir, entry->name );
if ( !tlsm_add_cert_from_file( ctx, fullpath, isca ) ) {
Debug( LDAP_DEBUG_TRACE,
"TLS: loaded CA certificate file %s from CA certificate directory %s.\n",
fullpath, cacertdir, 0 );
} else {
errcode = PR_GetError();
Debug( LDAP_DEBUG_TRACE,
"TLS: %s is not a valid CA certificate file - error %d:%s.\n",
fullpath, errcode,
PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
}
PR_smprintf_free( fullpath );
}
} while ( NULL != entry );
PR_CloseDir( dir );
}
done:
if ( status != PR_SUCCESS ) {
return -1;
}
return 0;
}
/*
* NSS supports having multiple cert/key databases in the same
* directory, each one having a unique string prefix e.g.
* slapd-01-cert8.db - the prefix here is "slapd-01-"
* this function examines the given certdir - if it looks like
* /path/to/directory/prefix it will return the
* /path/to/directory part in realcertdir, and the prefix in prefix
*/
static void
tlsm_get_certdb_prefix( const char *certdir, char **realcertdir, char **prefix )
{
char sep = PR_GetDirectorySeparator();
char *ptr = NULL;
struct PRFileInfo prfi;
PRStatus prc;
*realcertdir = (char *)certdir; /* default is the one passed in */
/* if certdir is not given, just return */
if ( !certdir ) {
return;
}
prc = PR_GetFileInfo( certdir, &prfi );
/* if certdir exists (file or directory) then it cannot specify a prefix */
if ( prc == PR_SUCCESS ) {
return;
}
/* if certdir was given, and there is a '/' in certdir, see if there
is anything after the last '/' - if so, assume it is the prefix */
if ( ( ( ptr = strrchr( certdir, sep ) ) ) && *(ptr+1) ) {
*realcertdir = PL_strndup( certdir, ptr-certdir );
*prefix = PL_strdup( ptr+1 );
}
return;
}
/*
* Currently mutiple MozNSS contexts share one certificate storage. When the
* certdb is being opened, only new certificates are added to the storage.
* When different databases are used, conflicting nicknames make the
* certificate lookup by the nickname impossible. In addition a token
* description might be prepended in certain conditions.
*
* In order to make the certificate lookup by nickname possible, we explicitly
* open each database using SECMOD_OpenUserDB and assign it the token
* description. The token description is generated using ctx->tc_unique value,
* which is unique for each context.
*/
static PK11SlotInfo *
tlsm_init_open_certdb( tlsm_ctx *ctx, const char *dbdir, const char *prefix )
{
PK11SlotInfo *slot = NULL;
char *token_desc = NULL;
char *config = NULL;
token_desc = PR_smprintf( TLSM_CERTDB_DESC_FMT, ctx->tc_unique );
config = PR_smprintf( "configDir='%s' tokenDescription='%s' certPrefix='%s' keyPrefix='%s' flags=readOnly",
dbdir, token_desc, prefix, prefix );
Debug( LDAP_DEBUG_TRACE, "TLS: certdb config: %s\n", config, 0, 0 );
slot = SECMOD_OpenUserDB( config );
if ( !slot ) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_TRACE, "TLS: cannot open certdb '%s', error %d:%s\n", dbdir, errcode,
PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
}
if ( token_desc )
PR_smprintf_free( token_desc );
if ( config )
PR_smprintf_free( config );
return slot;
}
/*
* This is the part of the init we defer until we get the
* actual security configuration information. This is
* only called once, protected by a PRCallOnce
* NOTE: This must be done before the first call to SSL_ImportFD,
* especially the setting of the policy
* NOTE: This must be called after fork()
*/
static int
tlsm_deferred_init( void *arg )
{
tlsm_ctx *ctx = (tlsm_ctx *)arg;
struct ldaptls *lt = ctx->tc_config;
const char *securitydirs[3];
int ii;
int nn;
PRErrorCode errcode = 1;
#ifdef HAVE_NSS_INITCONTEXT
NSSInitParameters initParams;
NSSInitContext *initctx = NULL;
PK11SlotInfo *certdb_slot = NULL;
#endif
SSLVersionRange range;
SSLProtocolVariant variant;
SECStatus rc;
int done = 0;
#ifdef HAVE_SECMOD_RESTARTMODULES
/* NSS enforces the pkcs11 requirement that modules should be unloaded after
a fork() - since there is no portable way to determine if NSS has been
already initialized in a parent process, we just call SECMOD_RestartModules
with force == FALSE - if the module has been unloaded due to a fork, it will
be reloaded, otherwise, it is a no-op */
if ( SECFailure == ( rc = SECMOD_RestartModules(PR_FALSE /* do not force */) ) ) {
errcode = PORT_GetError();
if ( errcode != SEC_ERROR_NOT_INITIALIZED ) {
Debug( LDAP_DEBUG_TRACE,
"TLS: could not restart the security modules: %d:%s\n",
errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ), 0 );
} else {
errcode = 1;
}
}
#endif
#ifdef HAVE_NSS_INITCONTEXT
memset( &initParams, 0, sizeof( initParams ) );
initParams.length = sizeof( initParams );
#endif /* HAVE_NSS_INITCONTEXT */
#ifdef LDAP_R_COMPILE
if ( PR_CallOnce( &tlsm_init_mutex_callonce, tlsm_thr_init_callonce ) ) {
return -1;
}
#endif /* LDAP_R_COMPILE */
#ifndef HAVE_NSS_INITCONTEXT
if ( !NSS_IsInitialized() ) {
#endif /* HAVE_NSS_INITCONTEXT */
/*
MOZNSS_DIR will override everything else - you can
always set MOZNSS_DIR to force the use of this
directory
If using MOZNSS, specify the location of the moznss db dir
in the cacertdir directive of the OpenLDAP configuration.
DEFAULT_MOZNSS_DIR will only be used if the code cannot
find a security dir to use based on the current
settings
*/
nn = 0;
securitydirs[nn++] = PR_GetEnv( "MOZNSS_DIR" );
securitydirs[nn++] = lt->lt_cacertdir;
securitydirs[nn++] = PR_GetEnv( "DEFAULT_MOZNSS_DIR" );
for ( ii = 0; !done && ( ii < nn ); ++ii ) {
char *realcertdir = NULL;
const char *defprefix = "";
char *prefix = (char *)defprefix;
const char *securitydir = securitydirs[ii];
if ( NULL == securitydir ) {
continue;
}
tlsm_get_certdb_prefix( securitydir, &realcertdir, &prefix );
/* initialize only moddb; certdb will be initialized explicitly */
#ifdef HAVE_NSS_INITCONTEXT
#ifdef INITCONTEXT_HACK
if ( !NSS_IsInitialized() && ctx->tc_is_server ) {
rc = NSS_Initialize( realcertdir, prefix, prefix, SECMOD_DB, NSS_INIT_READONLY );
} else {
initctx = NSS_InitContext( realcertdir, prefix, prefix, SECMOD_DB,
&initParams, NSS_INIT_READONLY|NSS_INIT_NOCERTDB );
}
#else
initctx = NSS_InitContext( realcertdir, prefix, prefix, SECMOD_DB,
&initParams, NSS_INIT_READONLY|NSS_INIT_NOCERTDB );
#endif
rc = SECFailure;
if ( initctx != NULL ) {
certdb_slot = tlsm_init_open_certdb( ctx, realcertdir, prefix );
if ( certdb_slot ) {
rc = SECSuccess;
ctx->tc_initctx = initctx;
ctx->tc_certdb_slot = certdb_slot;
} else {
NSS_ShutdownContext( initctx );
initctx = NULL;
}
}
#else
rc = NSS_Initialize( realcertdir, prefix, prefix, SECMOD_DB, NSS_INIT_READONLY );
#endif
if ( rc != SECSuccess ) {
errcode = PORT_GetError();
if ( securitydirs[ii] != lt->lt_cacertdir) {
Debug( LDAP_DEBUG_TRACE,
"TLS: could not initialize moznss using security dir %s prefix %s - error %d.\n",
realcertdir, prefix, errcode );
}
} else {
/* success */
Debug( LDAP_DEBUG_TRACE, "TLS: using moznss security dir %s prefix %s.\n",
realcertdir, prefix, 0 );
errcode = 0;
done = 1;
}
if ( realcertdir != securitydir ) {
PL_strfree( realcertdir );
}
if ( prefix != defprefix ) {
PL_strfree( prefix );
}
}
if ( errcode ) { /* no moznss db found, or not using moznss db */
#ifdef HAVE_NSS_INITCONTEXT
int flags = NSS_INIT_READONLY|NSS_INIT_NOCERTDB|NSS_INIT_NOMODDB;
#ifdef INITCONTEXT_HACK
if ( !NSS_IsInitialized() && ctx->tc_is_server ) {
rc = NSS_NoDB_Init( NULL );
} else {
initctx = NSS_InitContext( CERTDB_NONE, PREFIX_NONE, PREFIX_NONE, SECMOD_DB,
&initParams, flags );
rc = (initctx == NULL) ? SECFailure : SECSuccess;
}
#else
initctx = NSS_InitContext( CERTDB_NONE, PREFIX_NONE, PREFIX_NONE, SECMOD_DB,
&initParams, flags );
if ( initctx ) {
ctx->tc_initctx = initctx;
rc = SECSuccess;
} else {
rc = SECFailure;
}
#endif
#else
rc = NSS_NoDB_Init( NULL );
#endif
if ( rc != SECSuccess ) {
errcode = PORT_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not initialize moznss - error %d:%s.\n",
errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ), 0 );
return -1;
}
}
if ( errcode || lt->lt_cacertfile ) {
/* initialize the PEM module */
if ( tlsm_init_pem_module() ) {
int pem_errcode = PORT_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not initialize moznss PEM module - error %d:%s.\n",
pem_errcode, PR_ErrorToString( pem_errcode, PR_LANGUAGE_I_DEFAULT ), 0 );
if ( errcode ) /* PEM is required */
return -1;
} else if ( !errcode ) {
tlsm_init_ca_certs( ctx, lt->lt_cacertfile, NULL );
}
}
if ( errcode ) {
if ( tlsm_init_ca_certs( ctx, lt->lt_cacertfile, lt->lt_cacertdir ) ) {
/* if we tried to use lt->lt_cacertdir as an NSS key/cert db, errcode
will be a value other than 1 - print an error message so that the
user will know that failed too */
if ( ( errcode != 1 ) && ( lt->lt_cacertdir ) ) {
char *realcertdir = NULL;
char *prefix = NULL;
tlsm_get_certdb_prefix( lt->lt_cacertdir, &realcertdir, &prefix );
Debug( LDAP_DEBUG_TRACE,
"TLS: could not initialize moznss using security dir %s prefix %s - error %d.\n",
realcertdir, prefix ? prefix : "", errcode );
if ( realcertdir != lt->lt_cacertdir ) {
PL_strfree( realcertdir );
}
PL_strfree( prefix );
}
return -1;
}
ctx->tc_using_pem = PR_TRUE;
}
/*
* Set the SSL version range. MozNSS SSL versions are the same as openldap's:
*
* SSL_LIBRARY_VERSION_TLS_1_* are equivalent to LDAP_OPT_X_TLS_PROTOCOL_TLS1_*
*/
SSL_VersionRangeGetSupported(ssl_variant_stream, &range); /* this sets the max */
range.min = lt->lt_protocol_min ? lt->lt_protocol_min : range.min;
variant = ssl_variant_stream;
SSL_VersionRangeSetDefault(variant, &range);
NSS_SetDomesticPolicy();
PK11_SetPasswordFunc( tlsm_pin_prompt );
/* register cleanup function */
if ( tlsm_register_nss_shutdown() ) {
errcode = PORT_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not register NSS shutdown function: %d:%s\n",
errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ), 0 );
return -1;
}
if ( ctx->tc_is_server ) {
/* 0 means use the defaults here */
SSL_ConfigServerSessionIDCache( 0, 0, 0, NULL );
}
#ifndef HAVE_NSS_INITCONTEXT
}
#endif /* HAVE_NSS_INITCONTEXT */
return 0;
}
/*
* Find and verify the certificate.
* The key is loaded and stored in ctx->tc_private_key
*/
static int
tlsm_find_and_verify_cert_key( tlsm_ctx *ctx )
{
SECCertificateUsage certUsage;
PRBool checkSig;
SECStatus status;
void *pin_arg;
if ( tlsm_ctx_load_private_key( ctx ) )
return -1;
pin_arg = SSL_RevealPinArg( ctx->tc_model );
certUsage = ctx->tc_is_server ? certificateUsageSSLServer : certificateUsageSSLClient;
checkSig = ctx->tc_verify_cert ? PR_TRUE : PR_FALSE;
status = tlsm_verify_cert( ctx->tc_certdb, ctx->tc_certificate, pin_arg,
checkSig, certUsage, ctx->tc_warn_only, PR_TRUE );
return status == SECSuccess ? 0 : -1;
}
static int
tlsm_get_client_auth_data( void *arg, PRFileDesc *fd,
CERTDistNames *caNames, CERTCertificate **pRetCert,
SECKEYPrivateKey **pRetKey )
{
tlsm_ctx *ctx = (tlsm_ctx *)arg;
if ( pRetCert )
*pRetCert = CERT_DupCertificate( ctx->tc_certificate );
if ( pRetKey )
*pRetKey = SECKEY_CopyPrivateKey( ctx->tc_private_key );
return SECSuccess;
}
/*
* ctx must have a tc_model that is valid
*/
static int
tlsm_clientauth_init( tlsm_ctx *ctx )
{
SECStatus status = SECFailure;
int rc;
PRBool saveval;
saveval = ctx->tc_warn_only;
ctx->tc_warn_only = PR_TRUE;
rc = tlsm_find_and_verify_cert_key(ctx);
ctx->tc_warn_only = saveval;
if ( rc ) {
Debug( LDAP_DEBUG_ANY,
"TLS: error: unable to set up client certificate authentication for "
"certificate named %s\n", tlsm_ctx_subject_name(ctx), 0, 0 );
return -1;
}
status = SSL_GetClientAuthDataHook( ctx->tc_model,
tlsm_get_client_auth_data,
(void *)ctx );
return ( status == SECSuccess ? 0 : -1 );
}
/*
* Tear down the TLS subsystem. Should only be called once.
*/
static void
tlsm_destroy( void )
{
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_destroy( &tlsm_ctx_count_mutex );
ldap_pvt_thread_mutex_destroy( &tlsm_init_mutex );
ldap_pvt_thread_mutex_destroy( &tlsm_pem_mutex );
#endif
}
static struct ldaptls *
tlsm_copy_config ( const struct ldaptls *config )
{
struct ldaptls *copy;
assert( config );
copy = LDAP_MALLOC( sizeof( *copy ) );
if ( !copy )
return NULL;
memset( copy, 0, sizeof( *copy ) );
if ( config->lt_certfile )
copy->lt_certfile = LDAP_STRDUP( config->lt_certfile );
if ( config->lt_keyfile )
copy->lt_keyfile = LDAP_STRDUP( config->lt_keyfile );
if ( config->lt_dhfile )
copy->lt_dhfile = LDAP_STRDUP( config->lt_dhfile );
if ( config->lt_cacertfile )
copy->lt_cacertfile = LDAP_STRDUP( config->lt_cacertfile );
if ( config->lt_cacertdir )
copy->lt_cacertdir = LDAP_STRDUP( config->lt_cacertdir );
if ( config->lt_ciphersuite )
copy->lt_ciphersuite = LDAP_STRDUP( config->lt_ciphersuite );
if ( config->lt_crlfile )
copy->lt_crlfile = LDAP_STRDUP( config->lt_crlfile );
if ( config->lt_randfile )
copy->lt_randfile = LDAP_STRDUP( config->lt_randfile );
copy->lt_protocol_min = config->lt_protocol_min;
return copy;
}
static void
tlsm_free_config ( struct ldaptls *config )
{
assert( config );
if ( config->lt_certfile )
LDAP_FREE( config->lt_certfile );
if ( config->lt_keyfile )
LDAP_FREE( config->lt_keyfile );
if ( config->lt_dhfile )
LDAP_FREE( config->lt_dhfile );
if ( config->lt_cacertfile )
LDAP_FREE( config->lt_cacertfile );
if ( config->lt_cacertdir )
LDAP_FREE( config->lt_cacertdir );
if ( config->lt_ciphersuite )
LDAP_FREE( config->lt_ciphersuite );
if ( config->lt_crlfile )
LDAP_FREE( config->lt_crlfile );
if ( config->lt_randfile )
LDAP_FREE( config->lt_randfile );
LDAP_FREE( config );
}
static tls_ctx *
tlsm_ctx_new ( struct ldapoptions *lo )
{
tlsm_ctx *ctx;
ctx = LDAP_MALLOC( sizeof (*ctx) );
if ( ctx ) {
ctx->tc_refcnt = 1;
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_init( &ctx->tc_refmutex );
#endif
LDAP_MUTEX_LOCK( &tlsm_ctx_count_mutex );
ctx->tc_unique = tlsm_ctx_count++;
LDAP_MUTEX_UNLOCK( &tlsm_ctx_count_mutex );
ctx->tc_config = NULL; /* populated later by tlsm_ctx_init */
ctx->tc_certdb = NULL;
ctx->tc_certdb_slot = NULL;
ctx->tc_certificate = NULL;
ctx->tc_private_key = NULL;
ctx->tc_pin_file = NULL;
ctx->tc_model = NULL;
memset(&ctx->tc_callonce, 0, sizeof(ctx->tc_callonce));
ctx->tc_require_cert = lo->ldo_tls_require_cert;
ctx->tc_verify_cert = PR_FALSE;
ctx->tc_using_pem = PR_FALSE;
#ifdef HAVE_NSS_INITCONTEXT
ctx->tc_initctx = NULL;
#endif /* HAVE_NSS_INITCONTEXT */
ctx->tc_pem_objs = NULL;
ctx->tc_n_pem_objs = 0;
ctx->tc_warn_only = PR_FALSE;
}
return (tls_ctx *)ctx;
}
static void
tlsm_ctx_ref( tls_ctx *ctx )
{
tlsm_ctx *c = (tlsm_ctx *)ctx;
LDAP_MUTEX_LOCK( &c->tc_refmutex );
c->tc_refcnt++;
LDAP_MUTEX_UNLOCK( &c->tc_refmutex );
}
static void
tlsm_ctx_free ( tls_ctx *ctx )
{
tlsm_ctx *c = (tlsm_ctx *)ctx;
int refcount;
if ( !c ) return;
LDAP_MUTEX_LOCK( &c->tc_refmutex );
refcount = --c->tc_refcnt;
LDAP_MUTEX_UNLOCK( &c->tc_refmutex );
if ( refcount )
return;
LDAP_MUTEX_LOCK( &tlsm_init_mutex );
if ( c->tc_model )
PR_Close( c->tc_model );
if ( c->tc_certificate )
CERT_DestroyCertificate( c->tc_certificate );
if ( c->tc_private_key )
SECKEY_DestroyPrivateKey( c->tc_private_key );
c->tc_certdb = NULL; /* if not the default, may have to clean up */
if ( c->tc_certdb_slot ) {
if ( SECMOD_CloseUserDB( c->tc_certdb_slot ) ) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not close certdb slot - error %d:%s.\n",
errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ), 0 );
}
}
if ( c->tc_pin_file ) {
PL_strfree( c->tc_pin_file );
c->tc_pin_file = NULL;
}
tlsm_free_pem_objs( c );
#ifdef HAVE_NSS_INITCONTEXT
if ( c->tc_initctx ) {
if ( NSS_ShutdownContext( c->tc_initctx ) ) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could not shutdown NSS - error %d:%s.\n",
errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ), 0 );
}
}
c->tc_initctx = NULL;
#endif /* HAVE_NSS_INITCONTEXT */
LDAP_MUTEX_UNLOCK( &tlsm_init_mutex );
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_destroy( &c->tc_refmutex );
#endif
if ( c->tc_config )
tlsm_free_config( c->tc_config );
LDAP_FREE( c );
}
/*
* initialize a new TLS context
*/
static int
tlsm_ctx_init( struct ldapoptions *lo, struct ldaptls *lt, int is_server )
{
tlsm_ctx *ctx = (tlsm_ctx *)lo->ldo_tls_ctx;
ctx->tc_config = tlsm_copy_config( lt );
ctx->tc_is_server = is_server;
return 0;
}
/* returns true if the given string looks like
"tokenname" ":" "certnickname"
This is true if there is a ':' colon character
in the string and the colon is not the first
or the last character in the string
*/
static int
tlsm_is_tokenname_certnick( const char *certfile )
{
if ( certfile ) {
const char *ptr = PL_strchr( certfile, ':' );
return ptr && (ptr != certfile) && (*(ptr+1));
}
return 0;
}
static int
tlsm_deferred_ctx_init( void *arg )
{
tlsm_ctx *ctx = (tlsm_ctx *)arg;
PRBool sslv2 = PR_FALSE;
PRBool sslv3 = PR_TRUE;
PRBool tlsv1 = PR_TRUE;
PRBool request_cert = PR_FALSE;
PRInt32 require_cert = PR_FALSE;
PRFileDesc *fd;
struct ldaptls *lt;
if ( tlsm_deferred_init( ctx ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not perform TLS system initialization.\n",
0, 0, 0 );
return -1;
}
ctx->tc_certdb = CERT_GetDefaultCertDB(); /* If there is ever a per-context db, change this */
fd = PR_CreateIOLayerStub( tlsm_layer_id, &tlsm_PR_methods );
if ( fd ) {
ctx->tc_model = SSL_ImportFD( NULL, fd );
}
if ( !ctx->tc_model ) {
PRErrorCode err = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: could perform TLS socket I/O layer initialization - error %d:%s.\n",
err, PR_ErrorToString( err, PR_LANGUAGE_I_DEFAULT ), NULL );
if ( fd ) {
PR_Close( fd );
}
return -1;
}
if ( SSL_SetPKCS11PinArg(ctx->tc_model, ctx) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not set pin prompt argument\n", 0, 0, 0);
return -1;
}
if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_SECURITY, PR_TRUE ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not set secure mode on.\n",
0, 0, 0 );
return -1;
}
lt = ctx->tc_config;
/* default is sslv3 and tlsv1 */
if ( lt->lt_protocol_min ) {
if ( lt->lt_protocol_min > LDAP_OPT_X_TLS_PROTOCOL_SSL3 ) {
sslv3 = PR_FALSE;
} else if ( lt->lt_protocol_min <= LDAP_OPT_X_TLS_PROTOCOL_SSL2 ) {
sslv2 = PR_TRUE;
Debug( LDAP_DEBUG_ANY,
"TLS: warning: minimum TLS protocol level set to "
"include SSLv2 - SSLv2 is insecure - do not use\n", 0, 0, 0 );
}
}
if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_ENABLE_SSL2, sslv2 ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not set SSLv2 mode on.\n",
0, 0, 0 );
return -1;
}
if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_ENABLE_SSL3, sslv3 ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not set SSLv3 mode on.\n",
0, 0, 0 );
return -1;
}
if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_ENABLE_TLS, tlsv1 ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not set TLSv1 mode on.\n",
0, 0, 0 );
return -1;
}
if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_HANDSHAKE_AS_CLIENT, !ctx->tc_is_server ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not set handshake as client.\n",
0, 0, 0 );
return -1;
}
if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_HANDSHAKE_AS_SERVER, ctx->tc_is_server ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not set handshake as server.\n",
0, 0, 0 );
return -1;
}
if ( lt->lt_ciphersuite ) {
if ( tlsm_parse_ciphers( ctx, lt->lt_ciphersuite ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not set cipher list %s.\n",
lt->lt_ciphersuite, 0, 0 );
return -1;
}
} else if ( tlsm_parse_ciphers( ctx, "DEFAULT" ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not set cipher list DEFAULT.\n",
0, 0, 0 );
return -1;
}
if ( !ctx->tc_require_cert ) {
ctx->tc_verify_cert = PR_FALSE;
} else if ( !ctx->tc_is_server ) {
request_cert = PR_TRUE;
require_cert = SSL_REQUIRE_NO_ERROR;
if ( ctx->tc_require_cert == LDAP_OPT_X_TLS_DEMAND ||
ctx->tc_require_cert == LDAP_OPT_X_TLS_HARD ) {
require_cert = SSL_REQUIRE_ALWAYS;
}
if ( ctx->tc_require_cert != LDAP_OPT_X_TLS_ALLOW )
ctx->tc_verify_cert = PR_TRUE;
} else { /* server */
/* server does not request certs by default */
/* if allow - client may send cert, server will ignore if errors */
/* if try - client may send cert, server will error if bad cert */
/* if hard or demand - client must send cert, server will error if bad cert */
request_cert = PR_TRUE;
require_cert = SSL_REQUIRE_NO_ERROR;
if ( ctx->tc_require_cert == LDAP_OPT_X_TLS_DEMAND ||
ctx->tc_require_cert == LDAP_OPT_X_TLS_HARD ) {
require_cert = SSL_REQUIRE_ALWAYS;
}
if ( ctx->tc_require_cert != LDAP_OPT_X_TLS_ALLOW ) {
ctx->tc_verify_cert = PR_TRUE;
} else {
ctx->tc_warn_only = PR_TRUE;
}
}
if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_REQUEST_CERTIFICATE, request_cert ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not set request certificate mode.\n",
0, 0, 0 );
return -1;
}
if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_REQUIRE_CERTIFICATE, require_cert ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not set require certificate mode.\n",
0, 0, 0 );
return -1;
}
/* set up our cert and key, if any */
if ( lt->lt_certfile ) {
/* if using the PEM module, load the PEM file specified by lt_certfile */
/* otherwise, assume this is the name of a cert already in the db */
if ( ctx->tc_using_pem ) {
/* this sets ctx->tc_certificate to the correct value */
int rc = tlsm_add_cert_from_file( ctx, lt->lt_certfile, PR_FALSE );
if ( rc ) {
return rc;
}
} else {
char *tmp_certname;
if ( tlsm_is_tokenname_certnick( lt->lt_certfile )) {
/* assume already in form tokenname:certnickname */
tmp_certname = PL_strdup( lt->lt_certfile );
} else if ( ctx->tc_certdb_slot ) {
tmp_certname = PR_smprintf( TLSM_CERTDB_DESC_FMT ":%s", ctx->tc_unique, lt->lt_certfile );
} else {
tmp_certname = PR_smprintf( "%s", lt->lt_certfile );
}
ctx->tc_certificate = PK11_FindCertFromNickname( tmp_certname, SSL_RevealPinArg( ctx->tc_model ) );
PR_smprintf_free( tmp_certname );
if ( !ctx->tc_certificate ) {
PRErrorCode errcode = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: error: the certificate '%s' could not be found in the database - error %d:%s.\n",
lt->lt_certfile, errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
return -1;
}
}
}
if ( lt->lt_keyfile ) {
/* if using the PEM module, load the PEM file specified by lt_keyfile */
/* otherwise, assume this is the pininfo for the key */
if ( ctx->tc_using_pem ) {
int rc = tlsm_add_key_from_file( ctx, lt->lt_keyfile );
if ( rc ) {
return rc;
}
} else {
if ( ctx->tc_pin_file )
PL_strfree( ctx->tc_pin_file );
ctx->tc_pin_file = PL_strdup( lt->lt_keyfile );
}
}
/* Set up callbacks for use by clients */
if ( !ctx->tc_is_server ) {
if ( SSL_OptionSet( ctx->tc_model, SSL_NO_CACHE, PR_TRUE ) != SECSuccess ) {
PRErrorCode err = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: error: could not set nocache option for moznss - error %d:%s\n",
err, PR_ErrorToString( err, PR_LANGUAGE_I_DEFAULT ), NULL );
return -1;
}
if ( SSL_BadCertHook( ctx->tc_model, tlsm_bad_cert_handler, ctx ) != SECSuccess ) {
PRErrorCode err = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: error: could not set bad cert handler for moznss - error %d:%s\n",
err, PR_ErrorToString( err, PR_LANGUAGE_I_DEFAULT ), NULL );
return -1;
}
/*
since a cert has been specified, assume the client wants to do cert auth
*/
if ( ctx->tc_certificate ) {
if ( tlsm_clientauth_init( ctx ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: error: unable to set up client certificate authentication using '%s'\n",
tlsm_ctx_subject_name(ctx), 0, 0 );
return -1;
}
}
} else { /* set up secure server */
SSLKEAType certKEA;
SECStatus status;
/* must have a certificate for the server to use */
if ( !ctx->tc_certificate ) {
Debug( LDAP_DEBUG_ANY,
"TLS: error: no server certificate: must specify a certificate for the server to use\n",
0, 0, 0 );
return -1;
}
if ( tlsm_find_and_verify_cert_key( ctx ) ) {
Debug( LDAP_DEBUG_ANY,
"TLS: error: unable to find and verify server's cert and key for certificate %s\n",
tlsm_ctx_subject_name(ctx), 0, 0 );
return -1;
}
/* configure the socket to be a secure server socket */
certKEA = NSS_FindCertKEAType( ctx->tc_certificate );
status = SSL_ConfigSecureServer( ctx->tc_model, ctx->tc_certificate, ctx->tc_private_key, certKEA );
if ( SECSuccess != status ) {
PRErrorCode err = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: error: unable to configure secure server using certificate '%s' - error %d:%s\n",
tlsm_ctx_subject_name(ctx), err, PR_ErrorToString( err, PR_LANGUAGE_I_DEFAULT ) );
return -1;
}
}
/* Callback for authenticating certificate */
if ( SSL_AuthCertificateHook( ctx->tc_model, tlsm_auth_cert_handler,
ctx ) != SECSuccess ) {
PRErrorCode err = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: error: could not set auth cert handler for moznss - error %d:%s\n",
err, PR_ErrorToString( err, PR_LANGUAGE_I_DEFAULT ), NULL );
return -1;
}
if ( SSL_HandshakeCallback( ctx->tc_model, tlsm_handshake_complete_cb, ctx ) ) {
PRErrorCode err = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: error: could not set handshake callback for moznss - error %d:%s\n",
err, PR_ErrorToString( err, PR_LANGUAGE_I_DEFAULT ), NULL );
return -1;
}
tlsm_free_config( ctx->tc_config );
ctx->tc_config = NULL;
return 0;
}
struct tls_data {
tlsm_session *session;
Sockbuf_IO_Desc *sbiod;
/* there seems to be no portable way to determine if the
sockbuf sd has been set to nonblocking mode - the
call to ber_pvt_socket_set_nonblock() takes place
before the tls socket is set up, so we cannot
intercept that call either.
On systems where fcntl is available, we can just
F_GETFL and test for O_NONBLOCK. On other systems,
we will just see if the IO op returns EAGAIN or EWOULDBLOCK,
and just set this flag */
PRBool nonblock;
/*
* NSS tries hard to be backwards compatible with SSLv2 clients, or
* clients that send an SSLv2 client hello. This message is not
* tagged in any way, so NSS has no way to know if the incoming
* message is a valid SSLv2 client hello or just some bogus data
* (or cleartext LDAP). We store the first byte read from the
* client here. The most common case will be a client sending
* LDAP data instead of SSL encrypted LDAP data. This can happen,
* for example, if using ldapsearch -Z - if the starttls fails,
* the client will fallback to plain cleartext LDAP. So if we
* see that the firstbyte is a valid LDAP tag, we can be
* pretty sure this is happening.
*/
ber_tag_t firsttag;
/*
* NSS doesn't return SSL_ERROR_WANT_READ, SSL_ERROR_WANT_WRITE, etc.
* when it is blocked, so we have to set a flag in the wrapped send
* and recv calls that tells us what operation NSS was last blocked
* on
*/
#define TLSM_READ 1
#define TLSM_WRITE 2
int io_flag;
};
static struct tls_data *
tlsm_get_pvt_tls_data( PRFileDesc *fd )
{
struct tls_data *p;
PRFileDesc *myfd;
if ( !fd ) {
return NULL;
}
myfd = PR_GetIdentitiesLayer( fd, tlsm_layer_id );
if ( !myfd ) {
return NULL;
}
p = (struct tls_data *)myfd->secret;
return p;
}
static int
tlsm_is_non_ssl_message( PRFileDesc *fd, ber_tag_t *thebyte )
{
struct tls_data *p;
if ( thebyte ) {
*thebyte = LBER_DEFAULT;
}
p = tlsm_get_pvt_tls_data( fd );
if ( p == NULL || p->sbiod == NULL ) {
return 0;
}
if ( p->firsttag == LBER_SEQUENCE ) {
if ( thebyte ) {
*thebyte = p->firsttag;
}
return 1;
}
return 0;
}
static tls_session *
tlsm_session_new ( tls_ctx * ctx, int is_server )
{
tlsm_ctx *c = (tlsm_ctx *)ctx;
tlsm_session *session;
PRFileDesc *fd;
PRStatus status;
int rc;
c->tc_is_server = is_server;
LDAP_MUTEX_LOCK( &tlsm_init_mutex );
status = PR_CallOnceWithArg( &c->tc_callonce, tlsm_deferred_ctx_init, c );
LDAP_MUTEX_UNLOCK( &tlsm_init_mutex );
if ( PR_SUCCESS != status ) {
PRErrorCode err = PR_GetError();
Debug( LDAP_DEBUG_ANY,
"TLS: error: could not initialize moznss security context - error %d:%s\n",
err, PR_ErrorToString(err, PR_LANGUAGE_I_DEFAULT), NULL );
return NULL;
}
fd = PR_CreateIOLayerStub( tlsm_layer_id, &tlsm_PR_methods );
if ( !fd ) {
return NULL;
}
session = SSL_ImportFD( c->tc_model, fd );
if ( !session ) {
PR_DELETE( fd );
return NULL;
}
rc = SSL_ResetHandshake( session, is_server );
if ( rc ) {
PRErrorCode err = PR_GetError();
Debug( LDAP_DEBUG_TRACE,
"TLS: error: new session - reset handshake failure %d - error %d:%s\n",
rc, err,
err ? PR_ErrorToString( err, PR_LANGUAGE_I_DEFAULT ) : "unknown" );
PR_DELETE( fd );
PR_Close( session );
session = NULL;
}
return (tls_session *)session;
}
static int
tlsm_session_accept_or_connect( tls_session *session, int is_accept )
{
tlsm_session *s = (tlsm_session *)session;
int rc;
const char *op = is_accept ? "accept" : "connect";
if ( pem_module ) {
LDAP_MUTEX_LOCK( &tlsm_pem_mutex );
}
rc = SSL_ForceHandshake( s );
if ( pem_module ) {
LDAP_MUTEX_UNLOCK( &tlsm_pem_mutex );
}
if ( rc ) {
PRErrorCode err = PR_GetError();
rc = -1;
if ( err == PR_WOULD_BLOCK_ERROR ) {
ber_tag_t thetag = LBER_DEFAULT;
/* see if we are blocked because of a bogus packet */
if ( tlsm_is_non_ssl_message( s, &thetag ) ) { /* see if we received a non-SSL message */
Debug( LDAP_DEBUG_ANY,
"TLS: error: %s - error - received non-SSL message [0x%x]\n",
op, (unsigned int)thetag, 0 );
/* reset error to something more descriptive */
PR_SetError( SSL_ERROR_RX_MALFORMED_HELLO_REQUEST, EPROTO );
}
} else {
Debug( LDAP_DEBUG_ANY,
"TLS: error: %s - force handshake failure: errno %d - moznss error %d\n",
op, errno, err );
}
}
return rc;
}
static int
tlsm_session_accept( tls_session *session )
{
return tlsm_session_accept_or_connect( session, 1 );
}
static int
tlsm_session_connect( LDAP *ld, tls_session *session )
{
return tlsm_session_accept_or_connect( session, 0 );
}
static int
tlsm_session_upflags( Sockbuf *sb, tls_session *session, int rc )
{
int prerror = PR_GetError();
if ( ( prerror == PR_PENDING_INTERRUPT_ERROR ) || ( prerror == PR_WOULD_BLOCK_ERROR ) ) {
tlsm_session *s = (tlsm_session *)session;
struct tls_data *p = tlsm_get_pvt_tls_data( s );
if ( p && ( p->io_flag == TLSM_READ ) ) {
sb->sb_trans_needs_read = 1;
return 1;
} else if ( p && ( p->io_flag == TLSM_WRITE ) ) {
sb->sb_trans_needs_write = 1;
return 1;
}
}
return 0;
}
static char *
tlsm_session_errmsg( tls_session *sess, int rc, char *buf, size_t len )
{
int i;
int prerror = PR_GetError();
i = PR_GetErrorTextLength();
if ( i > len ) {
char *msg = LDAP_MALLOC( i+1 );
PR_GetErrorText( msg );
memcpy( buf, msg, len );
LDAP_FREE( msg );
} else if ( i ) {
PR_GetErrorText( buf );
} else if ( prerror ) {
i = PR_snprintf( buf, len, "TLS error %d:%s",
prerror, PR_ErrorToString( prerror, PR_LANGUAGE_I_DEFAULT ) );
}
return ( i > 0 ) ? buf : NULL;
}
static int
tlsm_session_my_dn( tls_session *session, struct berval *der_dn )
{
tlsm_session *s = (tlsm_session *)session;
CERTCertificate *cert;
cert = SSL_LocalCertificate( s );
if (!cert) return LDAP_INVALID_CREDENTIALS;
der_dn->bv_val = (char *)cert->derSubject.data;
der_dn->bv_len = cert->derSubject.len;
CERT_DestroyCertificate( cert );
return 0;
}
static int
tlsm_session_peer_dn( tls_session *session, struct berval *der_dn )
{
tlsm_session *s = (tlsm_session *)session;
CERTCertificate *cert;
cert = SSL_PeerCertificate( s );
if (!cert) return LDAP_INVALID_CREDENTIALS;
der_dn->bv_val = (char *)cert->derSubject.data;
der_dn->bv_len = cert->derSubject.len;
CERT_DestroyCertificate( cert );
return 0;
}
/* what kind of hostname were we given? */
#define IS_DNS 0
#define IS_IP4 1
#define IS_IP6 2
static int
tlsm_session_chkhost( LDAP *ld, tls_session *session, const char *name_in )
{
tlsm_session *s = (tlsm_session *)session;
CERTCertificate *cert;
const char *name, *domain = NULL, *ptr;
int ret, ntype = IS_DNS, nlen, dlen;
#ifdef LDAP_PF_INET6
struct in6_addr addr;
#else
struct in_addr addr;
#endif
SECItem altname;
SECStatus rv;
if( ldap_int_hostname &&
( !name_in || !strcasecmp( name_in, "localhost" ) ) )
{
name = ldap_int_hostname;
} else {
name = name_in;
}
nlen = strlen( name );
cert = SSL_PeerCertificate( s );
if (!cert) {
Debug( LDAP_DEBUG_ANY,
"TLS: unable to get peer certificate.\n",
0, 0, 0 );
/* if this was a fatal condition, things would have
* aborted long before now.
*/
return LDAP_SUCCESS;
}
#ifdef LDAP_PF_INET6
if (inet_pton(AF_INET6, name, &addr)) {
ntype = IS_IP6;
} else
#endif
if ((ptr = strrchr(name, '.')) && isdigit((unsigned char)ptr[1])) {
if (inet_aton(name, (struct in_addr *)&addr)) ntype = IS_IP4;
}
if (ntype == IS_DNS ) {
domain = strchr( name, '.' );
if ( domain )
dlen = nlen - ( domain - name );
}
ret = LDAP_LOCAL_ERROR;
rv = CERT_FindCertExtension( cert, SEC_OID_X509_SUBJECT_ALT_NAME,
&altname );
if ( rv == SECSuccess && altname.data ) {
PRArenaPool *arena;
CERTGeneralName *names, *cur;
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if ( !arena ) {
ret = LDAP_NO_MEMORY;
goto fail;
}
names = cur = CERT_DecodeAltNameExtension(arena, &altname);
if ( !cur )
goto altfail;
do {
char *host;
int hlen;
/* ignore empty */
if ( !cur->name.other.len ) continue;
host = (char *)cur->name.other.data;
hlen = cur->name.other.len;
if ( cur->type == certDNSName ) {
if ( ntype != IS_DNS ) continue;
/* is this an exact match? */
if ( nlen == hlen && !strncasecmp( name, host, nlen )) {
ret = LDAP_SUCCESS;
break;
}
/* is this a wildcard match? */
if ( domain && host[0] == '*' && host[1] == '.' &&
dlen == hlen-1 && !strncasecmp( domain, host+1, dlen )) {
ret = LDAP_SUCCESS;
break;
}
} else if ( cur->type == certIPAddress ) {
if ( ntype == IS_DNS ) continue;
#ifdef LDAP_PF_INET6
if (ntype == IS_IP6 && hlen != sizeof(struct in6_addr)) {
continue;
} else
#endif
if (ntype == IS_IP4 && hlen != sizeof(struct in_addr)) {
continue;
}
if (!memcmp(host, &addr, hlen)) {
ret = LDAP_SUCCESS;
break;
}
}
} while (( cur = CERT_GetNextGeneralName( cur )) != names );
altfail:
PORT_FreeArena( arena, PR_FALSE );
SECITEM_FreeItem( &altname, PR_FALSE );
}
/* no altnames matched, try the CN */
if ( ret != LDAP_SUCCESS ) {
/* find the last CN */
CERTRDN *rdn, **rdns;
CERTAVA *lastava = NULL;
char buf[2048];
buf[0] = '\0';
rdns = cert->subject.rdns;
while ( rdns && ( rdn = *rdns++ )) {
CERTAVA *ava, **avas = rdn->avas;
while ( avas && ( ava = *avas++ )) {
if ( CERT_GetAVATag( ava ) == SEC_OID_AVA_COMMON_NAME )
lastava = ava;
}
}
if ( lastava ) {
SECItem *av = CERT_DecodeAVAValue( &lastava->value );
if ( av ) {
if ( av->len == nlen && !strncasecmp( name, (char *)av->data, nlen )) {
ret = LDAP_SUCCESS;
} else if ( av->data[0] == '*' && av->data[1] == '.' &&
domain && dlen == av->len - 1 && !strncasecmp( domain,
(char *)(av->data+1), dlen )) {
ret = LDAP_SUCCESS;
} else {
int len = av->len;
if ( len >= sizeof(buf) )
len = sizeof(buf)-1;
memcpy( buf, av->data, len );
buf[len] = '\0';
}
SECITEM_FreeItem( av, PR_TRUE );
}
}
if ( ret != LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_ANY, "TLS: hostname (%s) does not match "
"common name in certificate (%s).\n",
name, buf, 0 );
ret = LDAP_CONNECT_ERROR;
if ( ld->ld_error ) {
LDAP_FREE( ld->ld_error );
}
ld->ld_error = LDAP_STRDUP(
_("TLS: hostname does not match CN in peer certificate"));
}
}
fail:
CERT_DestroyCertificate( cert );
return ret;
}
static int
tlsm_session_strength( tls_session *session )
{
tlsm_session *s = (tlsm_session *)session;
int rc, keySize;
rc = SSL_SecurityStatus( s, NULL, NULL, NULL, &keySize,
NULL, NULL );
return rc ? 0 : keySize;
}
static int
tlsm_session_unique( tls_session *sess, struct berval *buf, int is_server)
{
/* Need upstream support https://bugzilla.mozilla.org/show_bug.cgi?id=563276 */
return 0;
}
/*
* Yet again, we're pasting in glue that MozNSS ought to provide itself.
*
* SSL_LIBRARY_VERSION_TLS_1_* are equivalent to LDAP_OPT_X_TLS_PROTOCOL_TLS1_*
*/
static struct {
const char *name;
int num;
} pvers[] = {
{ "SSLv2", SSL_LIBRARY_VERSION_2 },
{ "SSLv3", SSL_LIBRARY_VERSION_3_0 },
{ "TLSv1", SSL_LIBRARY_VERSION_TLS_1_0 },
{ "TLSv1.1", SSL_LIBRARY_VERSION_TLS_1_1 },
{ "TLSv1.2", SSL_LIBRARY_VERSION_TLS_1_2 },
{ "TLSv1.3", SSL_LIBRARY_VERSION_TLS_1_3 },
{ NULL, 0 }
};
static const char *
tlsm_session_version( tls_session *sess )
{
tlsm_session *s = (tlsm_session *)sess;
SSLChannelInfo info;
int rc;
rc = SSL_GetChannelInfo( s, &info, sizeof( info ));
if ( rc == 0 ) {
int i;
for (i=0; pvers[i].name; i++)
if (pvers[i].num == info.protocolVersion)
return pvers[i].name;
}
return "unknown";
}
static const char *
tlsm_session_cipher( tls_session *sess )
{
tlsm_session *s = (tlsm_session *)sess;
SSLChannelInfo info;
int rc;
rc = SSL_GetChannelInfo( s, &info, sizeof( info ));
if ( rc == 0 ) {
SSLCipherSuiteInfo csinfo;
rc = SSL_GetCipherSuiteInfo( info.cipherSuite, &csinfo, sizeof( csinfo ));
if ( rc == 0 )
return csinfo.cipherSuiteName;
}
return "unknown";
}
static int
tlsm_session_peercert( tls_session *sess, struct berval *der )
{
tlsm_session *s = (tlsm_session *)sess;
CERTCertificate *cert;
cert = SSL_PeerCertificate( s );
if (!cert)
return -1;
der->bv_len = cert->derCert.len;
der->bv_val = LDAP_MALLOC( der->bv_len );
if (!der->bv_val)
return -1;
memcpy( der->bv_val, cert->derCert.data, der->bv_len );
return 0;
}
/*
* TLS support for LBER Sockbufs
*/
static PRStatus PR_CALLBACK
tlsm_PR_Close(PRFileDesc *fd)
{
int rc = PR_SUCCESS;
/* we don't need to actually close anything here, just
pop our io layer off the stack */
fd->secret = NULL; /* must have been freed before calling PR_Close */
if ( fd->lower ) {
fd = PR_PopIOLayer( fd, tlsm_layer_id );
/* if we are not the last layer, pass the close along */
if ( fd ) {
if ( fd->dtor ) {
fd->dtor( fd );
}
rc = fd->methods->close( fd );
}
} else {
/* we are the last layer - just call our dtor */
fd->dtor(fd);
}
return rc;
}
static PRStatus PR_CALLBACK
tlsm_PR_Shutdown(PRFileDesc *fd, PRShutdownHow how)
{
int rc = PR_SUCCESS;
if ( fd->lower ) {
rc = PR_Shutdown( fd->lower, how );
}
return rc;
}
static int PR_CALLBACK
tlsm_PR_Recv(PRFileDesc *fd, void *buf, PRInt32 len, PRIntn flags,
PRIntervalTime timeout)
{
struct tls_data *p;
int rc;
if ( buf == NULL || len <= 0 ) return 0;
p = tlsm_get_pvt_tls_data( fd );
if ( p == NULL || p->sbiod == NULL ) {
return 0;
}
rc = LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
if (rc <= 0) {
tlsm_map_error( errno );
if ( errno == EAGAIN || errno == EWOULDBLOCK ) {
p->nonblock = PR_TRUE; /* fd is using non-blocking io */
} else if ( errno ) { /* real error */
Debug( LDAP_DEBUG_TRACE,
"TLS: error: tlsm_PR_Recv returned %d - error %d:%s\n",
rc, errno, STRERROR(errno) );
}
} else if ( ( rc > 0 ) && ( len > 0 ) && ( p->firsttag == LBER_DEFAULT ) ) {
p->firsttag = (ber_tag_t)*((char *)buf);
}
p->io_flag = TLSM_READ;
return rc;
}
static int PR_CALLBACK
tlsm_PR_Send(PRFileDesc *fd, const void *buf, PRInt32 len, PRIntn flags,
PRIntervalTime timeout)
{
struct tls_data *p;
int rc;
if ( buf == NULL || len <= 0 ) return 0;
p = tlsm_get_pvt_tls_data( fd );
if ( p == NULL || p->sbiod == NULL ) {
return 0;
}
rc = LBER_SBIOD_WRITE_NEXT( p->sbiod, (char *)buf, len );
if (rc <= 0) {
tlsm_map_error( errno );
if ( errno == EAGAIN || errno == EWOULDBLOCK ) {
p->nonblock = PR_TRUE;
} else if ( errno ) { /* real error */
Debug( LDAP_DEBUG_TRACE,
"TLS: error: tlsm_PR_Send returned %d - error %d:%s\n",
rc, errno, STRERROR(errno) );
}
}
p->io_flag = TLSM_WRITE;
return rc;
}
static int PR_CALLBACK
tlsm_PR_Read(PRFileDesc *fd, void *buf, PRInt32 len)
{
return tlsm_PR_Recv( fd, buf, len, 0, PR_INTERVAL_NO_TIMEOUT );
}
static int PR_CALLBACK
tlsm_PR_Write(PRFileDesc *fd, const void *buf, PRInt32 len)
{
return tlsm_PR_Send( fd, buf, len, 0, PR_INTERVAL_NO_TIMEOUT );
}
static PRStatus PR_CALLBACK
tlsm_PR_GetPeerName(PRFileDesc *fd, PRNetAddr *addr)
{
struct tls_data *p;
ber_socklen_t len;
p = tlsm_get_pvt_tls_data( fd );
if ( p == NULL || p->sbiod == NULL ) {
return PR_FAILURE;
}
len = sizeof(PRNetAddr);
return getpeername( p->sbiod->sbiod_sb->sb_fd, (struct sockaddr *)addr, &len );
}
static PRStatus PR_CALLBACK
tlsm_PR_GetSocketOption(PRFileDesc *fd, PRSocketOptionData *data)
{
struct tls_data *p;
p = tlsm_get_pvt_tls_data( fd );
if ( p == NULL || data == NULL ) {
return PR_FAILURE;
}
/* only the nonblocking option is supported at this time
MozNSS SSL code needs it */
if ( data->option != PR_SockOpt_Nonblocking ) {
PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
return PR_FAILURE;
}
#ifdef HAVE_FCNTL
int flags = fcntl( p->sbiod->sbiod_sb->sb_fd, F_GETFL );
data->value.non_blocking = (flags & O_NONBLOCK) ? PR_TRUE : PR_FALSE;
#else /* punt :P */
data->value.non_blocking = p->nonblock;
#endif
return PR_SUCCESS;
}
static PRStatus PR_CALLBACK
tlsm_PR_prs_unimp()
{
PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
return PR_FAILURE;
}
static PRFileDesc * PR_CALLBACK
tlsm_PR_pfd_unimp()
{
PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
return NULL;
}
static PRInt16 PR_CALLBACK
tlsm_PR_i16_unimp()
{
PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
return SECFailure;
}
static PRInt32 PR_CALLBACK
tlsm_PR_i32_unimp()
{
PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
return SECFailure;
}
static PRInt64 PR_CALLBACK
tlsm_PR_i64_unimp()
{
PRInt64 res;
PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
LL_I2L(res, -1L);
return res;
}
static const PRIOMethods tlsm_PR_methods = {
PR_DESC_LAYERED,
tlsm_PR_Close, /* close */
tlsm_PR_Read, /* read */
tlsm_PR_Write, /* write */
tlsm_PR_i32_unimp, /* available */
tlsm_PR_i64_unimp, /* available64 */
tlsm_PR_prs_unimp, /* fsync */
tlsm_PR_i32_unimp, /* seek */
tlsm_PR_i64_unimp, /* seek64 */
tlsm_PR_prs_unimp, /* fileInfo */
tlsm_PR_prs_unimp, /* fileInfo64 */
tlsm_PR_i32_unimp, /* writev */
tlsm_PR_prs_unimp, /* connect */
tlsm_PR_pfd_unimp, /* accept */
tlsm_PR_prs_unimp, /* bind */
tlsm_PR_prs_unimp, /* listen */
(PRShutdownFN)tlsm_PR_Shutdown, /* shutdown */
tlsm_PR_Recv, /* recv */
tlsm_PR_Send, /* send */
tlsm_PR_i32_unimp, /* recvfrom */
tlsm_PR_i32_unimp, /* sendto */
(PRPollFN)tlsm_PR_i16_unimp, /* poll */
tlsm_PR_i32_unimp, /* acceptread */
tlsm_PR_i32_unimp, /* transmitfile */
tlsm_PR_prs_unimp, /* getsockname */
tlsm_PR_GetPeerName, /* getpeername */
tlsm_PR_i32_unimp, /* getsockopt OBSOLETE */
tlsm_PR_i32_unimp, /* setsockopt OBSOLETE */
tlsm_PR_GetSocketOption, /* getsocketoption */
tlsm_PR_i32_unimp, /* setsocketoption */
tlsm_PR_i32_unimp, /* Send a (partial) file with header/trailer*/
(PRConnectcontinueFN)tlsm_PR_prs_unimp, /* connectcontinue */
tlsm_PR_i32_unimp, /* reserved for future use */
tlsm_PR_i32_unimp, /* reserved for future use */
tlsm_PR_i32_unimp, /* reserved for future use */
tlsm_PR_i32_unimp /* reserved for future use */
};
/*
* Initialize TLS subsystem. Should be called only once.
* See tlsm_deferred_init for the bulk of the init process
*/
static int
tlsm_init( void )
{
char *nofork = PR_GetEnv( "NSS_STRICT_NOFORK" );
PR_Init(0, 0, 0);
tlsm_layer_id = PR_GetUniqueIdentity( "OpenLDAP" );
/*
* There are some applications that acquire a crypto context in the parent process
* and expect that crypto context to work after a fork(). This does not work
* with NSS using strict PKCS11 compliance mode. We set this environment
* variable here to tell the software encryption module/token to allow crypto
* contexts to persist across a fork(). However, if you are using some other
* module or encryption device that supports and expects full PKCS11 semantics,
* the only recourse is to rewrite the application with atfork() handlers to save
* the crypto context in the parent and restore (and SECMOD_RestartModules) the
* context in the child.
*/
if ( !nofork ) {
/* will leak one time */
char *noforkenvvar = PL_strdup( "NSS_STRICT_NOFORK=DISABLED" );
PR_SetEnv( noforkenvvar );
}
return 0;
}
static int
tlsm_sb_setup( Sockbuf_IO_Desc *sbiod, void *arg )
{
struct tls_data *p;
tlsm_session *session = arg;
PRFileDesc *fd;
assert( sbiod != NULL );
p = LBER_MALLOC( sizeof( *p ) );
if ( p == NULL ) {
return -1;
}
fd = PR_GetIdentitiesLayer( session, tlsm_layer_id );
if ( !fd ) {
LBER_FREE( p );
return -1;
}
fd->secret = (PRFilePrivate *)p;
p->session = session;
p->sbiod = sbiod;
p->firsttag = LBER_DEFAULT;
sbiod->sbiod_pvt = p;
return 0;
}
static int
tlsm_sb_remove( Sockbuf_IO_Desc *sbiod )
{
struct tls_data *p;
assert( sbiod != NULL );
assert( sbiod->sbiod_pvt != NULL );
p = (struct tls_data *)sbiod->sbiod_pvt;
PR_Close( p->session );
LBER_FREE( sbiod->sbiod_pvt );
sbiod->sbiod_pvt = NULL;
return 0;
}
static int
tlsm_sb_close( Sockbuf_IO_Desc *sbiod )
{
struct tls_data *p;
assert( sbiod != NULL );
assert( sbiod->sbiod_pvt != NULL );
p = (struct tls_data *)sbiod->sbiod_pvt;
PR_Shutdown( p->session, PR_SHUTDOWN_BOTH );
return 0;
}
static int
tlsm_sb_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
{
struct tls_data *p;
assert( sbiod != NULL );
assert( sbiod->sbiod_pvt != NULL );
p = (struct tls_data *)sbiod->sbiod_pvt;
if ( opt == LBER_SB_OPT_GET_SSL ) {
*((tlsm_session **)arg) = p->session;
return 1;
} else if ( opt == LBER_SB_OPT_DATA_READY ) {
if ( p && ( SSL_DataPending( p->session ) > 0 ) ) {
return 1;
}
}
return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
}
static ber_slen_t
tlsm_sb_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
{
struct tls_data *p;
ber_slen_t ret;
int err;
assert( sbiod != NULL );
assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
p = (struct tls_data *)sbiod->sbiod_pvt;
ret = PR_Recv( p->session, buf, len, 0, PR_INTERVAL_NO_TIMEOUT );
if ( ret < 0 ) {
err = PR_GetError();
if ( err == PR_PENDING_INTERRUPT_ERROR || err == PR_WOULD_BLOCK_ERROR ) {
sbiod->sbiod_sb->sb_trans_needs_read = 1;
sock_errset(EWOULDBLOCK);
}
} else {
sbiod->sbiod_sb->sb_trans_needs_read = 0;
}
return ret;
}
static ber_slen_t
tlsm_sb_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
{
struct tls_data *p;
ber_slen_t ret;
int err;
assert( sbiod != NULL );
assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
p = (struct tls_data *)sbiod->sbiod_pvt;
ret = PR_Send( p->session, (char *)buf, len, 0, PR_INTERVAL_NO_TIMEOUT );
if ( ret < 0 ) {
err = PR_GetError();
if ( err == PR_PENDING_INTERRUPT_ERROR || err == PR_WOULD_BLOCK_ERROR ) {
sbiod->sbiod_sb->sb_trans_needs_write = 1;
sock_errset(EWOULDBLOCK);
ret = 0;
}
} else {
sbiod->sbiod_sb->sb_trans_needs_write = 0;
}
return ret;
}
static Sockbuf_IO tlsm_sbio =
{
tlsm_sb_setup, /* sbi_setup */
tlsm_sb_remove, /* sbi_remove */
tlsm_sb_ctrl, /* sbi_ctrl */
tlsm_sb_read, /* sbi_read */
tlsm_sb_write, /* sbi_write */
tlsm_sb_close /* sbi_close */
};
tls_impl ldap_int_tls_impl = {
"MozNSS",
tlsm_init,
tlsm_destroy,
tlsm_ctx_new,
tlsm_ctx_ref,
tlsm_ctx_free,
tlsm_ctx_init,
tlsm_session_new,
tlsm_session_connect,
tlsm_session_accept,
tlsm_session_upflags,
tlsm_session_errmsg,
tlsm_session_my_dn,
tlsm_session_peer_dn,
tlsm_session_chkhost,
tlsm_session_strength,
tlsm_session_unique,
tlsm_session_version,
tlsm_session_cipher,
tlsm_session_peercert,
&tlsm_sbio,
#ifdef LDAP_R_COMPILE
tlsm_thr_init,
#else
NULL,
#endif
0
};
#endif /* HAVE_MOZNSS */
/*
emacs settings
Local Variables:
indent-tabs-mode: t
tab-width: 4
End:
*/
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