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ITS#4017 support Diffie-Hellman parameters for multiple key lengths

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This commit is contained in:
Howard Chu 2005-10-05 20:01:52 +00:00
parent dc61d7bc56
commit 9095af5928
3 changed files with 158 additions and 7 deletions
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1
include/ldap.h
View File

@ -136,6 +136,7 @@ LDAP_BEGIN_DECL
#define LDAP_OPT_X_TLS_CRLCHECK 0x600b
#define LDAP_OPT_X_TLS_CONNECT_CB 0x600c
#define LDAP_OPT_X_TLS_CONNECT_ARG 0x600d
#define LDAP_OPT_X_TLS_DHPARAMDIR 0x600e
#define LDAP_OPT_X_TLS_NEVER 0
#define LDAP_OPT_X_TLS_HARD 1

2
libraries/libldap/init.c
View File

@ -110,7 +110,7 @@ static const struct ol_attribute {
{0, ATTR_NONE, NULL, NULL, 0}
};
#define MAX_LDAP_ATTR_LEN sizeof("TLS_CACERTDIR")
#define MAX_LDAP_ATTR_LEN sizeof("TLS_CIPHER_SUITE")
#define MAX_LDAP_ENV_PREFIX_LEN 8
static void openldap_ldap_init_w_conf(

162
libraries/libldap/tls.c
View File

@ -50,6 +50,7 @@
static int tls_opt_trace = 1;
static char *tls_opt_certfile = NULL;
static char *tls_opt_keyfile = NULL;
static char *tls_opt_dhparamdir = NULL;
static char *tls_opt_cacertfile = NULL;
static char *tls_opt_cacertdir = NULL;
static int tls_opt_require_cert = LDAP_OPT_X_TLS_DEMAND;
@ -58,6 +59,7 @@ static int tls_opt_crlcheck = LDAP_OPT_X_TLS_CRL_NONE;
#endif
static char *tls_opt_ciphersuite = NULL;
static char *tls_opt_randfile = NULL;
static int tls_opt_dhparamdirlen;
#define HAS_TLS( sb ) ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO, \
(void *)&sb_tls_sbio )
@ -70,9 +72,7 @@ static int tls_verify_ok( int ok, X509_STORE_CTX *ctx );
static RSA * tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length );
static STACK_OF(X509_NAME) * get_ca_list( char * bundle, char * dir );
#if 0 /* Currently this is not used by anyone */
static DH * tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length );
#endif
static SSL_CTX *tls_def_ctx = NULL;
@ -134,6 +134,10 @@ ldap_pvt_tls_destroy( void )
LDAP_FREE( tls_opt_keyfile );
tls_opt_keyfile = NULL;
}
if ( tls_opt_dhparamdir ) {
LDAP_FREE( tls_opt_dhparamdir );
tls_opt_dhparamdir = NULL;
}
if ( tls_opt_cacertfile ) {
LDAP_FREE( tls_opt_cacertfile );
tls_opt_cacertfile = NULL;
@ -333,7 +337,7 @@ ldap_pvt_tls_init_def_ctx( void )
tls_opt_require_cert == LDAP_OPT_X_TLS_ALLOW ?
tls_verify_ok : tls_verify_cb );
SSL_CTX_set_tmp_rsa_callback( tls_def_ctx, tls_tmp_rsa_cb );
/* SSL_CTX_set_tmp_dh_callback( tls_def_ctx, tls_tmp_dh_cb ); */
SSL_CTX_set_tmp_dh_callback( tls_def_ctx, tls_tmp_dh_cb );
#ifdef HAVE_OPENSSL_CRL
if ( tls_opt_crlcheck ) {
X509_STORE *x509_s = SSL_CTX_get_cert_store( tls_def_ctx );
@ -1116,6 +1120,7 @@ ldap_int_tls_config( LDAP *ld, int option, const char *arg )
case LDAP_OPT_X_TLS_KEYFILE:
case LDAP_OPT_X_TLS_RANDOM_FILE:
case LDAP_OPT_X_TLS_CIPHER_SUITE:
case LDAP_OPT_X_TLS_DHPARAMDIR:
return ldap_pvt_tls_set_option( ld, option, (void *) arg );
case LDAP_OPT_X_TLS_REQUIRE_CERT:
@ -1213,6 +1218,10 @@ ldap_pvt_tls_get_option( LDAP *ld, int option, void *arg )
*(char **)arg = tls_opt_keyfile ?
LDAP_STRDUP( tls_opt_keyfile ) : NULL;
break;
case LDAP_OPT_X_TLS_DHPARAMDIR:
*(char **)arg = tls_opt_dhparamdir ?
LDAP_STRDUP( tls_opt_dhparamdir ) : NULL;
break;
case LDAP_OPT_X_TLS_REQUIRE_CERT:
*(int *)arg = tls_opt_require_cert;
break;
@ -1324,6 +1333,12 @@ ldap_pvt_tls_set_option( LDAP *ld, int option, void *arg )
if ( tls_opt_keyfile ) LDAP_FREE( tls_opt_keyfile );
tls_opt_keyfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
break;
case LDAP_OPT_X_TLS_DHPARAMDIR:
if ( tls_opt_dhparamdir ) LDAP_FREE( tls_opt_dhparamdir );
tls_opt_dhparamdir = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
if ( tls_opt_dhparamdir )
tls_opt_dhparamdirlen = strlen( tls_opt_dhparamdir );
break;
case LDAP_OPT_X_TLS_REQUIRE_CERT:
switch( *(int *) arg ) {
case LDAP_OPT_X_TLS_NEVER:
@ -1621,13 +1636,148 @@ tls_seed_PRNG( const char *randfile )
return 0;
}
#if 0
struct dhinfo {
int keylength;
const char *pem;
size_t size;
};
struct dhplist {
struct dhplist *next;
int keylength;
DH *param;
};
static struct dhplist *dhparams;
/* From the OpenSSL 0.9.7 distro */
static const char dhpem512[] =
"-----BEGIN DH PARAMETERS-----\n\
MEYCQQDaWDwW2YUiidDkr3VvTMqS3UvlM7gE+w/tlO+cikQD7VdGUNNpmdsp13Yn\n\
a6LT1BLiGPTdHghM9tgAPnxHdOgzAgEC\n\
-----END DH PARAMETERS-----\n";
static const char dhpem1024[] =
"-----BEGIN DH PARAMETERS-----\n\
MIGHAoGBAJf2QmHKtQXdKCjhPx1ottPb0PMTBH9A6FbaWMsTuKG/K3g6TG1Z1fkq\n\
/Gz/PWk/eLI9TzFgqVAuPvr3q14a1aZeVUMTgo2oO5/y2UHe6VaJ+trqCTat3xlx\n\
/mNbIK9HA2RgPC3gWfVLZQrY+gz3ASHHR5nXWHEyvpuZm7m3h+irAgEC\n\
-----END DH PARAMETERS-----\n";
static const char dhpem2048[] =
"-----BEGIN DH PARAMETERS-----\n\
MIIBCAKCAQEA7ZKJNYJFVcs7+6J2WmkEYb8h86tT0s0h2v94GRFS8Q7B4lW9aG9o\n\
AFO5Imov5Jo0H2XMWTKKvbHbSe3fpxJmw/0hBHAY8H/W91hRGXKCeyKpNBgdL8sh\n\
z22SrkO2qCnHJ6PLAMXy5fsKpFmFor2tRfCzrfnggTXu2YOzzK7q62bmqVdmufEo\n\
pT8igNcLpvZxk5uBDvhakObMym9mX3rAEBoe8PwttggMYiiw7NuJKO4MqD1llGkW\n\
aVM8U2ATsCun1IKHrRxynkE1/MJ86VHeYYX8GZt2YA8z+GuzylIOKcMH6JAWzMwA\n\
Gbatw6QwizOhr9iMjZ0B26TE3X8LvW84wwIBAg==\n\
-----END DH PARAMETERS-----\n";
static const char dhpem4096[] =
"-----BEGIN DH PARAMETERS-----\n\
MIICCAKCAgEA/urRnb6vkPYc/KEGXWnbCIOaKitq7ySIq9dTH7s+Ri59zs77zty7\n\
vfVlSe6VFTBWgYjD2XKUFmtqq6CqXMhVX5ElUDoYDpAyTH85xqNFLzFC7nKrff/H\n\
TFKNttp22cZE9V0IPpzedPfnQkE7aUdmF9JnDyv21Z/818O93u1B4r0szdnmEvEF\n\
bKuIxEHX+bp0ZR7RqE1AeifXGJX3d6tsd2PMAObxwwsv55RGkn50vHO4QxtTARr1\n\
rRUV5j3B3oPMgC7Offxx+98Xn45B1/G0Prp11anDsR1PGwtaCYipqsvMwQUSJtyE\n\
EOQWk+yFkeMe4vWv367eEi0Sd/wnC+TSXBE3pYvpYerJ8n1MceI5GQTdarJ77OW9\n\
bGTHmxRsLSCM1jpLdPja5jjb4siAa6EHc4qN9c/iFKS3PQPJEnX7pXKBRs5f7AF3\n\
W3RIGt+G9IVNZfXaS7Z/iCpgzgvKCs0VeqN38QsJGtC1aIkwOeyjPNy2G6jJ4yqH\n\
ovXYt/0mc00vCWeSNS1wren0pR2EiLxX0ypjjgsU1mk/Z3b/+zVf7fZSIB+nDLjb\n\
NPtUlJCVGnAeBK1J1nG3TQicqowOXoM6ISkdaXj5GPJdXHab2+S7cqhKGv5qC7rR\n\
jT6sx7RUr0CNTxzLI7muV2/a4tGmj0PSdXQdsZ7tw7gbXlaWT1+MM2MCAQI=\n\
-----END DH PARAMETERS-----\n";
static const struct dhinfo dhpem[] = {
{ 512, dhpem512, sizeof(dhpem512) },
{ 1024, dhpem1024, sizeof(dhpem1024) },
{ 2048, dhpem2048, sizeof(dhpem2048) },
{ 4096, dhpem4096, sizeof(dhpem4096) },
{ 0, NULL, 0 }
};
#define MAXDIGITS 12
#define DHFILEPATTERN "dh%d.pem"
static DH *
tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length )
{
return NULL;
}
struct dhplist *p = NULL;
BIO *b = NULL;
FILE *f;
char *file;
DH *dh = NULL;
/* Do we have params of this length already? */
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_lock( &tls_def_ctx_mutex );
#endif
for ( p = dhparams; p; p=p->next ) {
if ( p->keylength == key_length ) {
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
#endif
return p->param;
}
}
/* See if there's a file to load */
if ( tls_opt_dhparamdir ) {
file = LDAP_MALLOC( tls_opt_dhparamdirlen + 1 + MAXDIGITS +
sizeof(DHFILEPATTERN) );
if ( file == NULL )
goto done;
sprintf( file, "%s/" DHFILEPATTERN, tls_opt_dhparamdir, key_length );
} else {
file = LDAP_MALLOC( STRLENOF(LDAP_SYSCONFDIR) + 1 + MAXDIGITS +
sizeof(DHFILEPATTERN) );
if ( file == NULL )
goto done;
sprintf( file, LDAP_SYSCONFDIR "/" DHFILEPATTERN, key_length );
}
f = fopen(file,"r");
/* Did we get the file? */
if ( f ) {
b = BIO_new_fp( f, BIO_CLOSE );
if ( b == NULL )
fclose( f );
} else {
/* No - check for hardcoded params */
int i;
for (i=0; dhpem[i].keylength; i++) {
if ( dhpem[i].keylength == key_length ) {
b = BIO_new_mem_buf( (char *)dhpem[i].pem, dhpem[i].size );
break;
}
}
}
if ( b ) {
dh = PEM_read_bio_DHparams( b, NULL, NULL, NULL );
BIO_free( b );
}
/* Generating on the fly is expensive/slow... */
if ( !dh ) {
dh = DH_generate_parameters( key_length, DH_GENERATOR_2, NULL, NULL );
}
if ( dh ) {
p = LDAP_MALLOC( sizeof(struct dhplist) );
if ( p != NULL ) {
p->keylength = key_length;
p->param = dh;
p->next = dhparams;
dhparams = p;
}
}
done:
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
#endif
return dh;
}
#endif
void *