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cc69629626
openssl/apps/ts.c
FdaSilvaYY cc69629626 Constify char* input parameters in apps code 
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
2016-08-17 17:09:19 +01:00

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/*
* Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <openssl/opensslconf.h>
#ifdef OPENSSL_NO_TS
NON_EMPTY_TRANSLATION_UNIT
#else
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include "apps.h"
# include <openssl/bio.h>
# include <openssl/err.h>
# include <openssl/pem.h>
# include <openssl/rand.h>
# include <openssl/ts.h>
# include <openssl/bn.h>
/* Request nonce length, in bits (must be a multiple of 8). */
# define NONCE_LENGTH 64
/* Name of config entry that defines the OID file. */
# define ENV_OID_FILE "oid_file"
/* Is |EXACTLY_ONE| of three pointers set? */
# define EXACTLY_ONE(a, b, c) \
(( a && !b && !c) || \
( b && !a && !c) || \
( c && !a && !b))
static ASN1_OBJECT *txt2obj(const char *oid);
static CONF *load_config_file(const char *configfile);
/* Query related functions. */
static int query_command(const char *data, const char *digest,
const EVP_MD *md, const char *policy, int no_nonce,
int cert, const char *in, const char *out, int text);
static TS_REQ *create_query(BIO *data_bio, const char *digest, const EVP_MD *md,
const char *policy, int no_nonce, int cert);
static int create_digest(BIO *input, const char *digest,
const EVP_MD *md, unsigned char **md_value);
static ASN1_INTEGER *create_nonce(int bits);
/* Reply related functions. */
static int reply_command(CONF *conf, const char *section, const char *engine,
const char *queryfile, const char *passin, const char *inkey,
const EVP_MD *md, const char *signer, const char *chain,
const char *policy, const char *in, int token_in,
const char *out, int token_out, int text);
static TS_RESP *read_PKCS7(BIO *in_bio);
static TS_RESP *create_response(CONF *conf, const char *section, const char *engine,
const char *queryfile, const char *passin,
const char *inkey, const EVP_MD *md, const char *signer,
const char *chain, const char *policy);
static ASN1_INTEGER *serial_cb(TS_RESP_CTX *ctx, void *data);
static ASN1_INTEGER *next_serial(const char *serialfile);
static int save_ts_serial(const char *serialfile, ASN1_INTEGER *serial);
/* Verify related functions. */
static int verify_command(const char *data, const char *digest, const char *queryfile,
const char *in, int token_in,
const char *CApath, const char *CAfile, const char *untrusted,
X509_VERIFY_PARAM *vpm);
static TS_VERIFY_CTX *create_verify_ctx(const char *data, const char *digest,
const char *queryfile,
const char *CApath, const char *CAfile,
const char *untrusted,
X509_VERIFY_PARAM *vpm);
static X509_STORE *create_cert_store(const char *CApath, const char *CAfile,
X509_VERIFY_PARAM *vpm);
static int verify_cb(int ok, X509_STORE_CTX *ctx);
typedef enum OPTION_choice {
OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
OPT_ENGINE, OPT_CONFIG, OPT_SECTION, OPT_QUERY, OPT_DATA,
OPT_DIGEST, OPT_RAND, OPT_TSPOLICY, OPT_NO_NONCE, OPT_CERT,
OPT_IN, OPT_TOKEN_IN, OPT_OUT, OPT_TOKEN_OUT, OPT_TEXT,
OPT_REPLY, OPT_QUERYFILE, OPT_PASSIN, OPT_INKEY, OPT_SIGNER,
OPT_CHAIN, OPT_VERIFY, OPT_CAPATH, OPT_CAFILE, OPT_UNTRUSTED,
OPT_MD, OPT_V_ENUM
} OPTION_CHOICE;
OPTIONS ts_options[] = {
{"help", OPT_HELP, '-', "Display this summary"},
{"config", OPT_CONFIG, '<', "Configuration file"},
{"section", OPT_SECTION, 's', "Section to use within config file"},
{"query", OPT_QUERY, '-', "Generate a TS query"},
{"data", OPT_DATA, '<', "File to hash"},
{"digest", OPT_DIGEST, 's', "Digest (as a hex string)"},
{"rand", OPT_RAND, 's',
"Load the file(s) into the random number generator"},
{"tspolicy", OPT_TSPOLICY, 's', "Policy OID to use"},
{"no_nonce", OPT_NO_NONCE, '-', "Do not include a nonce"},
{"cert", OPT_CERT, '-', "Put cert request into query"},
{"in", OPT_IN, '<', "Input file"},
{"token_in", OPT_TOKEN_IN, '-', "Input is a PKCS#7 file"},
{"out", OPT_OUT, '>', "Output file"},
{"token_out", OPT_TOKEN_OUT, '-', "Output is a PKCS#7 file"},
{"text", OPT_TEXT, '-', "Output text (not DER)"},
{"reply", OPT_REPLY, '-', "Generate a TS reply"},
{"queryfile", OPT_QUERYFILE, '<', "File containing a TS query"},
{"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
{"inkey", OPT_INKEY, '<', "File with private key for reply"},
{"signer", OPT_SIGNER, 's'},
{"chain", OPT_CHAIN, '<', "File with signer CA chain"},
{"verify", OPT_VERIFY, '-', "Verify a TS response"},
{"CApath", OPT_CAPATH, '/', "Path to trusted CA files"},
{"CAfile", OPT_CAFILE, '<', "File with trusted CA certs"},
{"untrusted", OPT_UNTRUSTED, '<', "File with untrusted certs"},
{"", OPT_MD, '-', "Any supported digest"},
# ifndef OPENSSL_NO_ENGINE
{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
# endif
{OPT_HELP_STR, 1, '-', "\nOptions specific to 'ts -verify': \n"},
OPT_V_OPTIONS,
{OPT_HELP_STR, 1, '-', "\n"},
{NULL}
};
/*
* This command is so complex, special help is needed.
*/
static char* opt_helplist[] = {
"Typical uses:",
"ts -query [-rand file...] [-config file] [-data file]",
" [-digest hexstring] [-tspolicy oid] [-no_nonce] [-cert]",
" [-in file] [-out file] [-text]",
" or",
"ts -reply [-config file] [-section tsa_section]",
" [-queryfile file] [-passin password]",
" [-signer tsa_cert.pem] [-inkey private_key.pem]",
" [-chain certs_file.pem] [-tspolicy oid]",
" [-in file] [-token_in] [-out file] [-token_out]",
# ifndef OPENSSL_NO_ENGINE
" [-text] [-engine id]",
# else
" [-text]",
# endif
" or",
"ts -verify -CApath dir -CAfile file.pem -untrusted file.pem",
" [-data file] [-digest hexstring]",
" [-queryfile file] -in file [-token_in]",
" [[options specific to 'ts -verify']]",
NULL,
};
int ts_main(int argc, char **argv)
{
CONF *conf = NULL;
const char *CAfile = NULL, *untrusted = NULL, *prog;
const char *configfile = default_config_file, *engine = NULL;
const char *section = NULL;
char **helpp;
char *password = NULL;
char *data = NULL, *digest = NULL, *rnd = NULL, *policy = NULL;
char *in = NULL, *out = NULL, *queryfile = NULL, *passin = NULL;
char *inkey = NULL, *signer = NULL, *chain = NULL, *CApath = NULL;
const EVP_MD *md = NULL;
OPTION_CHOICE o, mode = OPT_ERR;
int ret = 1, no_nonce = 0, cert = 0, text = 0;
int vpmtouched = 0;
X509_VERIFY_PARAM *vpm = NULL;
/* Input is ContentInfo instead of TimeStampResp. */
int token_in = 0;
/* Output is ContentInfo instead of TimeStampResp. */
int token_out = 0;
if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
goto end;
prog = opt_init(argc, argv, ts_options);
while ((o = opt_next()) != OPT_EOF) {
switch (o) {
case OPT_EOF:
case OPT_ERR:
opthelp:
BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
goto end;
case OPT_HELP:
opt_help(ts_options);
for (helpp = opt_helplist; *helpp; ++helpp)
BIO_printf(bio_err, "%s\n", *helpp);
ret = 0;
goto end;
case OPT_CONFIG:
configfile = opt_arg();
break;
case OPT_SECTION:
section = opt_arg();
break;
case OPT_QUERY:
case OPT_REPLY:
case OPT_VERIFY:
if (mode != OPT_ERR)
goto opthelp;
mode = o;
break;
case OPT_DATA:
data = opt_arg();
break;
case OPT_DIGEST:
digest = opt_arg();
break;
case OPT_RAND:
rnd = opt_arg();
break;
case OPT_TSPOLICY:
policy = opt_arg();
break;
case OPT_NO_NONCE:
no_nonce = 1;
break;
case OPT_CERT:
cert = 1;
break;
case OPT_IN:
in = opt_arg();
break;
case OPT_TOKEN_IN:
token_in = 1;
break;
case OPT_OUT:
out = opt_arg();
break;
case OPT_TOKEN_OUT:
token_out = 1;
break;
case OPT_TEXT:
text = 1;
break;
case OPT_QUERYFILE:
queryfile = opt_arg();
break;
case OPT_PASSIN:
passin = opt_arg();
break;
case OPT_INKEY:
inkey = opt_arg();
break;
case OPT_SIGNER:
signer = opt_arg();
break;
case OPT_CHAIN:
chain = opt_arg();
break;
case OPT_CAPATH:
CApath = opt_arg();
break;
case OPT_CAFILE:
CAfile = opt_arg();
break;
case OPT_UNTRUSTED:
untrusted = opt_arg();
break;
case OPT_ENGINE:
engine = opt_arg();
break;
case OPT_MD:
if (!opt_md(opt_unknown(), &md))
goto opthelp;
break;
case OPT_V_CASES:
if (!opt_verify(o, vpm))
goto end;
vpmtouched++;
break;
}
}
if (mode == OPT_ERR || opt_num_rest() != 0)
goto opthelp;
/* Seed the random number generator if it is going to be used. */
if (mode == OPT_QUERY && !no_nonce) {
if (!app_RAND_load_file(NULL, 1) && rnd == NULL)
BIO_printf(bio_err, "warning, not much extra random "
"data, consider using the -rand option\n");
if (rnd != NULL)
BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
app_RAND_load_files(rnd));
}
if (mode == OPT_REPLY && passin &&
!app_passwd(passin, NULL, &password, NULL)) {
BIO_printf(bio_err, "Error getting password.\n");
goto end;
}
conf = load_config_file(configfile);
if (configfile != default_config_file && !app_load_modules(conf))
goto end;
/* Check parameter consistency and execute the appropriate function. */
switch (mode) {
default:
case OPT_ERR:
goto opthelp;
case OPT_QUERY:
if (vpmtouched)
goto opthelp;
if ((data != NULL) && (digest != NULL))
goto opthelp;
ret = !query_command(data, digest, md, policy, no_nonce, cert,
in, out, text);
break;
case OPT_REPLY:
if (vpmtouched)
goto opthelp;
if ((in != NULL) && (queryfile != NULL))
goto opthelp;
if (in == NULL) {
if ((conf == NULL) || (token_in != 0))
goto opthelp;
}
ret = !reply_command(conf, section, engine, queryfile,
password, inkey, md, signer, chain, policy,
in, token_in, out, token_out, text);
break;
case OPT_VERIFY:
if ((in == NULL) || !EXACTLY_ONE(queryfile, data, digest))
goto opthelp;
ret = !verify_command(data, digest, queryfile, in, token_in,
CApath, CAfile, untrusted,
vpmtouched ? vpm : NULL);
}
end:
X509_VERIFY_PARAM_free(vpm);
app_RAND_write_file(NULL);
NCONF_free(conf);
OPENSSL_free(password);
return (ret);
}
/*
* Configuration file-related function definitions.
*/
static ASN1_OBJECT *txt2obj(const char *oid)
{
ASN1_OBJECT *oid_obj = NULL;
if ((oid_obj = OBJ_txt2obj(oid, 0)) == NULL)
BIO_printf(bio_err, "cannot convert %s to OID\n", oid);
return oid_obj;
}
static CONF *load_config_file(const char *configfile)
{
CONF *conf = app_load_config(configfile);
if (conf != NULL) {
const char *p;
BIO_printf(bio_err, "Using configuration from %s\n", configfile);
p = NCONF_get_string(conf, NULL, ENV_OID_FILE);
if (p != NULL) {
BIO *oid_bio = BIO_new_file(p, "r");
if (!oid_bio)
ERR_print_errors(bio_err);
else {
OBJ_create_objects(oid_bio);
BIO_free_all(oid_bio);
}
} else
ERR_clear_error();
if (!add_oid_section(conf))
ERR_print_errors(bio_err);
}
return conf;
}
/*
* Query-related method definitions.
*/
static int query_command(const char *data, const char *digest, const EVP_MD *md,
const char *policy, int no_nonce,
int cert, const char *in, const char *out, int text)
{
int ret = 0;
TS_REQ *query = NULL;
BIO *in_bio = NULL;
BIO *data_bio = NULL;
BIO *out_bio = NULL;
/* Build query object. */
if (in != NULL) {
if ((in_bio = bio_open_default(in, 'r', FORMAT_ASN1)) == NULL)
goto end;
query = d2i_TS_REQ_bio(in_bio, NULL);
} else {
if (digest == NULL
&& (data_bio = bio_open_default(data, 'r', FORMAT_ASN1)) == NULL)
goto end;
query = create_query(data_bio, digest, md, policy, no_nonce, cert);
}
if (query == NULL)
goto end;
if (text) {
if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
goto end;
if (!TS_REQ_print_bio(out_bio, query))
goto end;
} else {
if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
goto end;
if (!i2d_TS_REQ_bio(out_bio, query))
goto end;
}
ret = 1;
end:
ERR_print_errors(bio_err);
BIO_free_all(in_bio);
BIO_free_all(data_bio);
BIO_free_all(out_bio);
TS_REQ_free(query);
return ret;
}
static TS_REQ *create_query(BIO *data_bio, const char *digest, const EVP_MD *md,
const char *policy, int no_nonce, int cert)
{
int ret = 0;
TS_REQ *ts_req = NULL;
int len;
TS_MSG_IMPRINT *msg_imprint = NULL;
X509_ALGOR *algo = NULL;
unsigned char *data = NULL;
ASN1_OBJECT *policy_obj = NULL;
ASN1_INTEGER *nonce_asn1 = NULL;
if (md == NULL && (md = EVP_get_digestbyname("sha1")) == NULL)
goto err;
if ((ts_req = TS_REQ_new()) == NULL)
goto err;
if (!TS_REQ_set_version(ts_req, 1))
goto err;
if ((msg_imprint = TS_MSG_IMPRINT_new()) == NULL)
goto err;
if ((algo = X509_ALGOR_new()) == NULL)
goto err;
if ((algo->algorithm = OBJ_nid2obj(EVP_MD_type(md))) == NULL)
goto err;
if ((algo->parameter = ASN1_TYPE_new()) == NULL)
goto err;
algo->parameter->type = V_ASN1_NULL;
if (!TS_MSG_IMPRINT_set_algo(msg_imprint, algo))
goto err;
if ((len = create_digest(data_bio, digest, md, &data)) == 0)
goto err;
if (!TS_MSG_IMPRINT_set_msg(msg_imprint, data, len))
goto err;
if (!TS_REQ_set_msg_imprint(ts_req, msg_imprint))
goto err;
if (policy && (policy_obj = txt2obj(policy)) == NULL)
goto err;
if (policy_obj && !TS_REQ_set_policy_id(ts_req, policy_obj))
goto err;
/* Setting nonce if requested. */
if (!no_nonce && (nonce_asn1 = create_nonce(NONCE_LENGTH)) == NULL)
goto err;
if (nonce_asn1 && !TS_REQ_set_nonce(ts_req, nonce_asn1))
goto err;
if (!TS_REQ_set_cert_req(ts_req, cert))
goto err;
ret = 1;
err:
if (!ret) {
TS_REQ_free(ts_req);
ts_req = NULL;
BIO_printf(bio_err, "could not create query\n");
ERR_print_errors(bio_err);
}
TS_MSG_IMPRINT_free(msg_imprint);
X509_ALGOR_free(algo);
OPENSSL_free(data);
ASN1_OBJECT_free(policy_obj);
ASN1_INTEGER_free(nonce_asn1);
return ts_req;
}
static int create_digest(BIO *input, const char *digest, const EVP_MD *md,
unsigned char **md_value)
{
int md_value_len;
int rv = 0;
EVP_MD_CTX *md_ctx = NULL;
md_value_len = EVP_MD_size(md);
if (md_value_len < 0)
return 0;
if (input) {
unsigned char buffer[4096];
int length;
md_ctx = EVP_MD_CTX_new();
if (md_ctx == NULL)
return 0;
*md_value = app_malloc(md_value_len, "digest buffer");
if (!EVP_DigestInit(md_ctx, md))
goto err;
while ((length = BIO_read(input, buffer, sizeof(buffer))) > 0) {
if (!EVP_DigestUpdate(md_ctx, buffer, length))
goto err;
}
if (!EVP_DigestFinal(md_ctx, *md_value, NULL))
goto err;
md_value_len = EVP_MD_size(md);
} else {
long digest_len;
*md_value = OPENSSL_hexstr2buf(digest, &digest_len);
if (!*md_value || md_value_len != digest_len) {
OPENSSL_free(*md_value);
*md_value = NULL;
BIO_printf(bio_err, "bad digest, %d bytes "
"must be specified\n", md_value_len);
return 0;
}
}
rv = md_value_len;
err:
EVP_MD_CTX_free(md_ctx);
return rv;
}
static ASN1_INTEGER *create_nonce(int bits)
{
unsigned char buf[20];
ASN1_INTEGER *nonce = NULL;
int len = (bits - 1) / 8 + 1;
int i;
if (len > (int)sizeof(buf))
goto err;
if (RAND_bytes(buf, len) <= 0)
goto err;
/* Find the first non-zero byte and creating ASN1_INTEGER object. */
for (i = 0; i < len && !buf[i]; ++i)
continue;
if ((nonce = ASN1_INTEGER_new()) == NULL)
goto err;
OPENSSL_free(nonce->data);
nonce->length = len - i;
nonce->data = app_malloc(nonce->length + 1, "nonce buffer");
memcpy(nonce->data, buf + i, nonce->length);
return nonce;
err:
BIO_printf(bio_err, "could not create nonce\n");
ASN1_INTEGER_free(nonce);
return NULL;
}
/*
* Reply-related method definitions.
*/
static int reply_command(CONF *conf, const char *section, const char *engine,
const char *queryfile, const char *passin, const char *inkey,
const EVP_MD *md, const char *signer, const char *chain,
const char *policy, const char *in, int token_in,
const char *out, int token_out, int text)
{
int ret = 0;
TS_RESP *response = NULL;
BIO *in_bio = NULL;
BIO *query_bio = NULL;
BIO *inkey_bio = NULL;
BIO *signer_bio = NULL;
BIO *out_bio = NULL;
if (in != NULL) {
if ((in_bio = BIO_new_file(in, "rb")) == NULL)
goto end;
if (token_in) {
response = read_PKCS7(in_bio);
} else {
response = d2i_TS_RESP_bio(in_bio, NULL);
}
} else {
response = create_response(conf, section, engine, queryfile,
passin, inkey, md, signer, chain, policy);
if (response)
BIO_printf(bio_err, "Response has been generated.\n");
else
BIO_printf(bio_err, "Response is not generated.\n");
}
if (response == NULL)
goto end;
/* Write response. */
if (text) {
if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
goto end;
if (token_out) {
TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response);
if (!TS_TST_INFO_print_bio(out_bio, tst_info))
goto end;
} else {
if (!TS_RESP_print_bio(out_bio, response))
goto end;
}
} else {
if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
goto end;
if (token_out) {
PKCS7 *token = TS_RESP_get_token(response);
if (!i2d_PKCS7_bio(out_bio, token))
goto end;
} else {
if (!i2d_TS_RESP_bio(out_bio, response))
goto end;
}
}
ret = 1;
end:
ERR_print_errors(bio_err);
BIO_free_all(in_bio);
BIO_free_all(query_bio);
BIO_free_all(inkey_bio);
BIO_free_all(signer_bio);
BIO_free_all(out_bio);
TS_RESP_free(response);
return ret;
}
/* Reads a PKCS7 token and adds default 'granted' status info to it. */
static TS_RESP *read_PKCS7(BIO *in_bio)
{
int ret = 0;
PKCS7 *token = NULL;
TS_TST_INFO *tst_info = NULL;
TS_RESP *resp = NULL;
TS_STATUS_INFO *si = NULL;
if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
goto end;
if ((tst_info = PKCS7_to_TS_TST_INFO(token)) == NULL)
goto end;
if ((resp = TS_RESP_new()) == NULL)
goto end;
if ((si = TS_STATUS_INFO_new()) == NULL)
goto end;
if (!TS_STATUS_INFO_set_status(si, TS_STATUS_GRANTED))
goto end;
if (!TS_RESP_set_status_info(resp, si))
goto end;
TS_RESP_set_tst_info(resp, token, tst_info);
token = NULL; /* Ownership is lost. */
tst_info = NULL; /* Ownership is lost. */
ret = 1;
end:
PKCS7_free(token);
TS_TST_INFO_free(tst_info);
if (!ret) {
TS_RESP_free(resp);
resp = NULL;
}
TS_STATUS_INFO_free(si);
return resp;
}
static TS_RESP *create_response(CONF *conf, const char *section, const char *engine,
const char *queryfile, const char *passin,
const char *inkey, const EVP_MD *md, const char *signer,
const char *chain, const char *policy)
{
int ret = 0;
TS_RESP *response = NULL;
BIO *query_bio = NULL;
TS_RESP_CTX *resp_ctx = NULL;
if ((query_bio = BIO_new_file(queryfile, "rb")) == NULL)
goto end;
if ((section = TS_CONF_get_tsa_section(conf, section)) == NULL)
goto end;
if ((resp_ctx = TS_RESP_CTX_new()) == NULL)
goto end;
if (!TS_CONF_set_serial(conf, section, serial_cb, resp_ctx))
goto end;
# ifndef OPENSSL_NO_ENGINE
if (!TS_CONF_set_crypto_device(conf, section, engine))
goto end;
# endif
if (!TS_CONF_set_signer_cert(conf, section, signer, resp_ctx))
goto end;
if (!TS_CONF_set_certs(conf, section, chain, resp_ctx))
goto end;
if (!TS_CONF_set_signer_key(conf, section, inkey, passin, resp_ctx))
goto end;
if (md) {
if (!TS_RESP_CTX_set_signer_digest(resp_ctx, md))
goto end;
} else if (!TS_CONF_set_signer_digest(conf, section, NULL, resp_ctx)) {
goto end;
}
if (!TS_CONF_set_def_policy(conf, section, policy, resp_ctx))
goto end;
if (!TS_CONF_set_policies(conf, section, resp_ctx))
goto end;
if (!TS_CONF_set_digests(conf, section, resp_ctx))
goto end;
if (!TS_CONF_set_accuracy(conf, section, resp_ctx))
goto end;
if (!TS_CONF_set_clock_precision_digits(conf, section, resp_ctx))
goto end;
if (!TS_CONF_set_ordering(conf, section, resp_ctx))
goto end;
if (!TS_CONF_set_tsa_name(conf, section, resp_ctx))
goto end;
if (!TS_CONF_set_ess_cert_id_chain(conf, section, resp_ctx))
goto end;
if ((response = TS_RESP_create_response(resp_ctx, query_bio)) == NULL)
goto end;
ret = 1;
end:
if (!ret) {
TS_RESP_free(response);
response = NULL;
}
TS_RESP_CTX_free(resp_ctx);
BIO_free_all(query_bio);
return response;
}
static ASN1_INTEGER *serial_cb(TS_RESP_CTX *ctx, void *data)
{
const char *serial_file = (const char *)data;
ASN1_INTEGER *serial = next_serial(serial_file);
if (!serial) {
TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
"Error during serial number "
"generation.");
TS_RESP_CTX_add_failure_info(ctx, TS_INFO_ADD_INFO_NOT_AVAILABLE);
} else
save_ts_serial(serial_file, serial);
return serial;
}
static ASN1_INTEGER *next_serial(const char *serialfile)
{
int ret = 0;
BIO *in = NULL;
ASN1_INTEGER *serial = NULL;
BIGNUM *bn = NULL;
if ((serial = ASN1_INTEGER_new()) == NULL)
goto err;
if ((in = BIO_new_file(serialfile, "r")) == NULL) {
ERR_clear_error();
BIO_printf(bio_err, "Warning: could not open file %s for "
"reading, using serial number: 1\n", serialfile);
if (!ASN1_INTEGER_set(serial, 1))
goto err;
} else {
char buf[1024];
if (!a2i_ASN1_INTEGER(in, serial, buf, sizeof(buf))) {
BIO_printf(bio_err, "unable to load number from %s\n",
serialfile);
goto err;
}
if ((bn = ASN1_INTEGER_to_BN(serial, NULL)) == NULL)
goto err;
ASN1_INTEGER_free(serial);
serial = NULL;
if (!BN_add_word(bn, 1))
goto err;
if ((serial = BN_to_ASN1_INTEGER(bn, NULL)) == NULL)
goto err;
}
ret = 1;
err:
if (!ret) {
ASN1_INTEGER_free(serial);
serial = NULL;
}
BIO_free_all(in);
BN_free(bn);
return serial;
}
static int save_ts_serial(const char *serialfile, ASN1_INTEGER *serial)
{
int ret = 0;
BIO *out = NULL;
if ((out = BIO_new_file(serialfile, "w")) == NULL)
goto err;
if (i2a_ASN1_INTEGER(out, serial) <= 0)
goto err;
if (BIO_puts(out, "\n") <= 0)
goto err;
ret = 1;
err:
if (!ret)
BIO_printf(bio_err, "could not save serial number to %s\n",
serialfile);
BIO_free_all(out);
return ret;
}
/*
* Verify-related method definitions.
*/
static int verify_command(const char *data, const char *digest, const char *queryfile,
const char *in, int token_in,
const char *CApath, const char *CAfile, const char *untrusted,
X509_VERIFY_PARAM *vpm)
{
BIO *in_bio = NULL;
PKCS7 *token = NULL;
TS_RESP *response = NULL;
TS_VERIFY_CTX *verify_ctx = NULL;
int ret = 0;
if ((in_bio = BIO_new_file(in, "rb")) == NULL)
goto end;
if (token_in) {
if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
goto end;
} else {
if ((response = d2i_TS_RESP_bio(in_bio, NULL)) == NULL)
goto end;
}
if ((verify_ctx = create_verify_ctx(data, digest, queryfile,
CApath, CAfile, untrusted,
vpm)) == NULL)
goto end;
ret = token_in
? TS_RESP_verify_token(verify_ctx, token)
: TS_RESP_verify_response(verify_ctx, response);
end:
printf("Verification: ");
if (ret)
printf("OK\n");
else {
printf("FAILED\n");
ERR_print_errors(bio_err);
}
BIO_free_all(in_bio);
PKCS7_free(token);
TS_RESP_free(response);
TS_VERIFY_CTX_free(verify_ctx);
return ret;
}
static TS_VERIFY_CTX *create_verify_ctx(const char *data, const char *digest,
const char *queryfile,
const char *CApath, const char *CAfile,
const char *untrusted,
X509_VERIFY_PARAM *vpm)
{
TS_VERIFY_CTX *ctx = NULL;
BIO *input = NULL;
TS_REQ *request = NULL;
int ret = 0;
int f = 0;
if (data != NULL || digest != NULL) {
if ((ctx = TS_VERIFY_CTX_new()) == NULL)
goto err;
f = TS_VFY_VERSION | TS_VFY_SIGNER;
if (data != NULL) {
f |= TS_VFY_DATA;
if (TS_VERIFY_CTX_set_data(ctx, BIO_new_file(data, "rb")) == NULL)
goto err;
} else if (digest != NULL) {
long imprint_len;
unsigned char *hexstr = OPENSSL_hexstr2buf(digest, &imprint_len);
f |= TS_VFY_IMPRINT;
if (TS_VERIFY_CTX_set_imprint(ctx, hexstr, imprint_len) == NULL) {
BIO_printf(bio_err, "invalid digest string\n");
goto err;
}
}
} else if (queryfile != NULL) {
if ((input = BIO_new_file(queryfile, "rb")) == NULL)
goto err;
if ((request = d2i_TS_REQ_bio(input, NULL)) == NULL)
goto err;
if ((ctx = TS_REQ_to_TS_VERIFY_CTX(request, NULL)) == NULL)
goto err;
} else
return NULL;
/* Add the signature verification flag and arguments. */
TS_VERIFY_CTX_add_flags(ctx, f | TS_VFY_SIGNATURE);
/* Initialising the X509_STORE object. */
if (TS_VERIFY_CTX_set_store(ctx, create_cert_store(CApath, CAfile, vpm))
== NULL)
goto err;
/* Loading untrusted certificates. */
if (untrusted
&& TS_VERIFY_CTS_set_certs(ctx, TS_CONF_load_certs(untrusted)) == NULL)
goto err;
ret = 1;
err:
if (!ret) {
TS_VERIFY_CTX_free(ctx);
ctx = NULL;
}
BIO_free_all(input);
TS_REQ_free(request);
return ctx;
}
static X509_STORE *create_cert_store(const char *CApath, const char *CAfile,
X509_VERIFY_PARAM *vpm)
{
X509_STORE *cert_ctx = NULL;
X509_LOOKUP *lookup = NULL;
int i;
cert_ctx = X509_STORE_new();
X509_STORE_set_verify_cb(cert_ctx, verify_cb);
if (CApath != NULL) {
lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
if (lookup == NULL) {
BIO_printf(bio_err, "memory allocation failure\n");
goto err;
}
i = X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM);
if (!i) {
BIO_printf(bio_err, "Error loading directory %s\n", CApath);
goto err;
}
}
if (CAfile != NULL) {
lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
if (lookup == NULL) {
BIO_printf(bio_err, "memory allocation failure\n");
goto err;
}
i = X509_LOOKUP_load_file(lookup, CAfile, X509_FILETYPE_PEM);
if (!i) {
BIO_printf(bio_err, "Error loading file %s\n", CAfile);
goto err;
}
}
if (vpm != NULL)
X509_STORE_set1_param(cert_ctx, vpm);
return cert_ctx;
err:
X509_STORE_free(cert_ctx);
return NULL;
}
static int verify_cb(int ok, X509_STORE_CTX *ctx)
{
return ok;
}
#endif /* ndef OPENSSL_NO_TS */
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