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src/usr.bin/openssl/ts.c

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/* $OpenBSD: ts.c,v 1.27 2023/11/19 09:19:54 tb Exp $ */
/* Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL
* project 2002.
*/
/* ====================================================================
* Copyright (c) 2001 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/ts.h>
/* Length of the nonce of the request in bits (must be a multiple of 8). */
#define NONCE_LENGTH 64
/* Macro definitions for the configuration file. */
#define ENV_OID_FILE "oid_file"
/* Local function declarations. */
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, char *digest, const EVP_MD *md,
const char *policy, int no_nonce, int cert, const char *in, const char *out,
int text);
static BIO *BIO_open_with_default(const char *file, const char *mode,
FILE *default_fp);
static TS_REQ *create_query(BIO *data_bio, char *digest, const EVP_MD *md,
const char *policy, int no_nonce, int cert);
static int create_digest(BIO *input, 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, char *section, char *queryfile,
char *passin, char *inkey, char *signer, char *chain, const char *policy,
char *in, int token_in, 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,
char *queryfile, char *passin, char *inkey, char *signer, 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(char *data, char *digest, char *queryfile, char *in,
int token_in, char *ca_path, char *ca_file, char *untrusted);
static TS_VERIFY_CTX *create_verify_ctx(char *data, char *digest,
char *queryfile, char *ca_path, char *ca_file, char *untrusted);
static X509_STORE *create_cert_store(char *ca_path, char *ca_file);
static int verify_cb(int ok, X509_STORE_CTX *ctx);
enum mode {
CMD_NONE, CMD_QUERY, CMD_REPLY, CMD_VERIFY
};
static struct {
char *ca_file;
char *ca_path;
int cert;
char *chain;
char *configfile;
char *data;
char *digest;
char *in;
char *inkey;
const EVP_MD *md;
int mode;
int no_nonce;
char *out;
char *passin;
char *policy;
char *queryfile;
char *section;
char *signer;
int text;
int token_in;
int token_out;
char *untrusted;
} cfg;
static int
ts_opt_md(int argc, char **argv, int *argsused)
{
char *name = argv[0];
if (*name++ != '-')
return (1);
if ((cfg.md = EVP_get_digestbyname(name)) == NULL)
return (1);
*argsused = 1;
return (0);
}
static int
ts_opt_query(void)
{
if (cfg.mode != CMD_NONE)
return (1);
cfg.mode = CMD_QUERY;
return (0);
}
static int
ts_opt_reply(void)
{
if (cfg.mode != CMD_NONE)
return (1);
cfg.mode = CMD_REPLY;
return (0);
}
static int
ts_opt_verify(void)
{
if (cfg.mode != CMD_NONE)
return (1);
cfg.mode = CMD_VERIFY;
return (0);
}
static const struct option ts_options[] = {
{
.name = "CAfile",
.argname = "file",
.desc = "Certificate Authority file",
.type = OPTION_ARG,
.opt.arg = &cfg.ca_file,
},
{
.name = "CApath",
.argname = "path",
.desc = "Certificate Authority path",
.type = OPTION_ARG,
.opt.arg = &cfg.ca_path,
},
{
.name = "cert",
.desc = "Include signing certificate in the response",
.type = OPTION_FLAG,
.opt.flag = &cfg.cert,
},
{
.name = "chain",
.argname = "file",
.desc = "PEM certificates that will be included in the response",
.type = OPTION_ARG,
.opt.arg = &cfg.chain,
},
{
.name = "config",
.argname = "file",
.desc = "Specify an alternative configuration file",
.type = OPTION_ARG,
.opt.arg = &cfg.configfile,
},
{
.name = "data",
.argname = "file",
.desc = "Data file for which the time stamp request needs to be created",
.type = OPTION_ARG,
.opt.arg = &cfg.data,
},
{
.name = "digest",
.argname = "arg",
.desc = "Specify the message imprint explicitly without the data file",
.type = OPTION_ARG,
.opt.arg = &cfg.digest,
},
{
.name = "in",
.argname = "file",
.desc = "Input file",
.type = OPTION_ARG,
.opt.arg = &cfg.in,
},
{
.name = "inkey",
.argname = "file",
.desc = "Input key file",
.type = OPTION_ARG,
.opt.arg = &cfg.inkey,
},
{
.name = "no_nonce",
.desc = "Specify no nonce in the request",
.type = OPTION_FLAG,
.opt.flag = &cfg.no_nonce,
},
{
.name = "out",
.argname = "file",
.desc = "Output file",
.type = OPTION_ARG,
.opt.arg = &cfg.out,
},
{
.name = "passin",
.argname = "src",
.desc = "Private key password source",
.type = OPTION_ARG,
.opt.arg = &cfg.passin,
},
{
.name = "policy",
.argname = "object_id",
.desc = "Policy for the TSA to use when creating the time stamp token",
.type = OPTION_ARG,
.opt.arg = &cfg.policy,
},
{
.name = "query",
.desc = "Create and print a time stamp request",
.type = OPTION_FUNC,
.opt.func = ts_opt_query,
},
{
.name = "queryfile",
.argname = "file",
.desc = "File containing a DER-encoded time stamp request",
.type = OPTION_ARG,
.opt.arg = &cfg.queryfile,
},
{
.name = "reply",
.desc = "Create a time stamp response",
.type = OPTION_FUNC,
.opt.func = ts_opt_reply,
},
{
.name = "section",
.argname = "arg",
.desc = "TSA section containing the settings for response generation",
.type = OPTION_ARG,
.opt.arg = &cfg.section,
},
{
.name = "signer",
.argname = "file",
.desc = "Signer certificate file",
.type = OPTION_ARG,
.opt.arg = &cfg.signer,
},
{
.name = "text",
.desc = "Output in human-readable text format",
.type = OPTION_FLAG,
.opt.flag = &cfg.text,
},
{
.name = "token_in",
.desc = "Input is a DER-encoded time stamp token",
.type = OPTION_FLAG,
.opt.flag = &cfg.token_in,
},
{
.name = "token_out",
.desc = "Output is a DER-encoded time stamp token",
.type = OPTION_FLAG,
.opt.flag = &cfg.token_out,
},
{
.name = "untrusted",
.argname = "file",
.desc = "File containing untrusted certificates",
.type = OPTION_ARG,
.opt.arg = &cfg.untrusted,
},
{
.name = "verify",
.desc = "Verify a time stamp response",
.type = OPTION_FUNC,
.opt.func = ts_opt_verify,
},
{
.name = NULL,
.desc = "",
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = ts_opt_md,
},
{ NULL },
};
static void
ts_usage(void)
{
fprintf(stderr, "usage:\n"
"ts -query [-md4 | -md5 | -ripemd160 | -sha1] [-cert]\n"
" [-config configfile] [-data file_to_hash]\n"
" [-digest digest_bytes] [-in request.tsq] [-no_nonce]\n"
" [-out request.tsq] [-policy object_id] [-text]\n");
fprintf(stderr, "\n"
"ts -reply [-chain certs_file.pem] [-config configfile]\n"
" [-in response.tsr] [-inkey private.pem] [-out response.tsr]\n"
" [-passin arg] [-policy object_id] [-queryfile request.tsq]\n"
" [-section tsa_section] [-signer tsa_cert.pem] [-text]\n"
" [-token_in] [-token_out]\n");
fprintf(stderr, "\n"
"ts -verify [-CAfile trusted_certs.pem]\n"
" [-CApath trusted_cert_path] [-data file_to_hash]\n"
" [-digest digest_bytes] [-in response.tsr]\n"
" [-queryfile request.tsq] [-token_in]\n"
" [-untrusted cert_file.pem]\n");
fprintf(stderr, "\n");
options_usage(ts_options);
fprintf(stderr, "\n");
}
int
ts_main(int argc, char **argv)
{
int ret = 1;
CONF *conf = NULL;
char *password = NULL; /* Password itself. */
if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
perror("pledge");
exit(1);
}
memset(&cfg, 0, sizeof(cfg));
cfg.mode = CMD_NONE;
if (options_parse(argc, argv, ts_options, NULL, NULL) != 0)
goto usage;
/* Get the password if required. */
if (cfg.mode == CMD_REPLY && cfg.passin != NULL &&
!app_passwd(bio_err, cfg.passin, NULL, &password, NULL)) {
BIO_printf(bio_err, "Error getting password.\n");
goto cleanup;
}
/*
* Check consistency of parameters and execute the appropriate
* function.
*/
switch (cfg.mode) {
case CMD_NONE:
goto usage;
case CMD_QUERY:
/*
* Data file and message imprint cannot be specified at the
* same time.
*/
ret = cfg.data != NULL && cfg.digest != NULL;
if (ret)
goto usage;
/* Load the config file for possible policy OIDs. */
conf = load_config_file(cfg.configfile);
ret = !query_command(cfg.data, cfg.digest,
cfg.md, cfg.policy, cfg.no_nonce,
cfg.cert, cfg.in, cfg.out,
cfg.text);
break;
case CMD_REPLY:
conf = load_config_file(cfg.configfile);
if (cfg.in == NULL) {
ret = !(cfg.queryfile != NULL && conf != NULL &&
!cfg.token_in);
if (ret)
goto usage;
} else {
/* 'in' and 'queryfile' are exclusive. */
ret = !(cfg.queryfile == NULL);
if (ret)
goto usage;
}
ret = !reply_command(conf, cfg.section,
cfg.queryfile, password, cfg.inkey,
cfg.signer, cfg.chain, cfg.policy,
cfg.in, cfg.token_in, cfg.out,
cfg.token_out, cfg.text);
break;
case CMD_VERIFY:
ret = !(((cfg.queryfile != NULL && cfg.data == NULL &&
cfg.digest == NULL) ||
(cfg.queryfile == NULL && cfg.data != NULL &&
cfg.digest == NULL) ||
(cfg.queryfile == NULL && cfg.data == NULL &&
cfg.digest != NULL)) &&
cfg.in != NULL);
if (ret)
goto usage;
ret = !verify_command(cfg.data, cfg.digest,
cfg.queryfile, cfg.in, cfg.token_in,
cfg.ca_path, cfg.ca_file, cfg.untrusted);
}
goto cleanup;
usage:
ts_usage();
cleanup:
/* Clean up. */
NCONF_free(conf);
free(password);
OBJ_cleanup();
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 = NULL;
long errorline = -1;
if (configfile == NULL)
configfile = getenv("OPENSSL_CONF");
if (configfile != NULL &&
((conf = NCONF_new(NULL)) == NULL ||
NCONF_load(conf, configfile, &errorline) <= 0)) {
if (errorline <= 0)
BIO_printf(bio_err, "error loading the config file "
"'%s'\n", configfile);
else
BIO_printf(bio_err, "error on line %ld of config file "
"'%s'\n", errorline, 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 == NULL)
ERR_print_errors(bio_err);
else {
OBJ_create_objects(oid_bio);
BIO_free_all(oid_bio);
}
} else
ERR_clear_error();
if (!add_oid_section(bio_err, conf))
ERR_print_errors(bio_err);
}
return conf;
}
/*
* Query-related method definitions.
*/
static int
query_command(const char *data, 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 either from file or from scratch. */
if (in != NULL) {
if ((in_bio = BIO_new_file(in, "rb")) == NULL)
goto end;
query = d2i_TS_REQ_bio(in_bio, NULL);
} else {
/* Open the file if no explicit digest bytes were specified. */
if (digest == NULL &&
(data_bio = BIO_open_with_default(data, "rb", stdin)) == NULL)
goto end;
/* Creating the query object. */
query = create_query(data_bio, digest, md,
policy, no_nonce, cert);
/* Saving the random number generator state. */
}
if (query == NULL)
goto end;
/* Write query either in ASN.1 or in text format. */
if ((out_bio = BIO_open_with_default(out, "wb", stdout)) == NULL)
goto end;
if (text) {
/* Text output. */
if (!TS_REQ_print_bio(out_bio, query))
goto end;
} else {
/* ASN.1 output. */
if (!i2d_TS_REQ_bio(out_bio, query))
goto end;
}
ret = 1;
end:
ERR_print_errors(bio_err);
/* Clean up. */
BIO_free_all(in_bio);
BIO_free_all(data_bio);
BIO_free_all(out_bio);
TS_REQ_free(query);
return ret;
}
static BIO *
BIO_open_with_default(const char *file, const char *mode, FILE *default_fp)
{
return file == NULL ? BIO_new_fp(default_fp, BIO_NOCLOSE) :
BIO_new_file(file, mode);
}
static TS_REQ *
create_query(BIO *data_bio, 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 *md_obj = NULL, *policy_obj = NULL;
ASN1_INTEGER *nonce_asn1 = NULL;
/* Setting default message digest. */
if (md == NULL && (md = EVP_get_digestbyname("sha1")) == NULL)
goto err;
/* Creating request object. */
if ((ts_req = TS_REQ_new()) == NULL)
goto err;
/* Setting version. */
if (!TS_REQ_set_version(ts_req, 1))
goto err;
/* Creating and adding MSG_IMPRINT object. */
if ((msg_imprint = TS_MSG_IMPRINT_new()) == NULL)
goto err;
/* Adding algorithm. */
if ((algo = X509_ALGOR_new()) == NULL)
goto err;
if ((md_obj = OBJ_nid2obj(EVP_MD_type(md))) == NULL)
goto err;
/*
* This does not use X509_ALGOR_set_md() for historical reasons.
* See the comment in PKCS7_SIGNER_INFO_set() for details.
*/
if (!X509_ALGOR_set0(algo, md_obj, V_ASN1_NULL, NULL))
goto err;
if (!TS_MSG_IMPRINT_set_algo(msg_imprint, algo))
goto err;
/* Adding message digest. */
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;
/* Setting policy if requested. */
if (policy != NULL && (policy_obj = txt2obj(policy)) == NULL)
goto err;
if (policy_obj != NULL && !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 != NULL && !TS_REQ_set_nonce(ts_req, nonce_asn1))
goto err;
/* Setting certificate request flag if requested. */
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");
}
TS_MSG_IMPRINT_free(msg_imprint);
X509_ALGOR_free(algo);
free(data);
ASN1_OBJECT_free(policy_obj);
ASN1_INTEGER_free(nonce_asn1);
return ts_req;
}
static int
create_digest(BIO *input, char *digest, const EVP_MD *md,
unsigned char **md_value)
{
int md_value_len;
EVP_MD_CTX *md_ctx = NULL;
md_value_len = EVP_MD_size(md);
if (md_value_len < 0)
goto err;
if (input != NULL) {
/* Digest must be computed from an input file. */
unsigned char buffer[4096];
int length;
*md_value = malloc(md_value_len);
if (*md_value == NULL)
goto err;
if ((md_ctx = EVP_MD_CTX_new()) == NULL)
goto err;
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;
EVP_MD_CTX_free(md_ctx);
md_ctx = NULL;
} else {
/* Digest bytes are specified with digest. */
long digest_len;
*md_value = string_to_hex(digest, &digest_len);
if (*md_value == NULL || md_value_len != digest_len) {
free(*md_value);
*md_value = NULL;
BIO_printf(bio_err, "bad digest, %d bytes "
"must be specified\n", md_value_len);
goto err;
}
}
return md_value_len;
err:
EVP_MD_CTX_free(md_ctx);
return 0;
}
static ASN1_INTEGER *
create_nonce(int bits)
{
unsigned char buf[20];
ASN1_INTEGER *nonce = NULL;
int len = (bits - 1) / 8 + 1;
int i;
/* Generating random byte sequence. */
if (len > (int) sizeof(buf))
goto err;
arc4random_buf(buf, len);
/* Find the first non-zero byte and creating ASN1_INTEGER object. */
for (i = 0; i < len && !buf[i]; ++i)
;
if ((nonce = ASN1_INTEGER_new()) == NULL)
goto err;
free(nonce->data);
/* Allocate at least one byte. */
nonce->length = len - i;
if ((nonce->data = malloc(nonce->length + 1)) == NULL)
goto err;
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, char *section, char *queryfile, char *passin,
char *inkey, char *signer, char *chain, const char *policy, char *in,
int token_in, 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;
/* Build response object either from response or query. */
if (in != NULL) {
if ((in_bio = BIO_new_file(in, "rb")) == NULL)
goto end;
if (token_in) {
/*
* We have a ContentInfo (PKCS7) object, add
* 'granted' status info around it.
*/
response = read_PKCS7(in_bio);
} else {
/* We have a ready-made TS_RESP object. */
response = d2i_TS_RESP_bio(in_bio, NULL);
}
} else {
response = create_response(conf, section, queryfile, passin,
inkey, signer, chain, policy);
if (response != NULL)
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 either in ASN.1 or text format. */
if ((out_bio = BIO_open_with_default(out, "wb", stdout)) == NULL)
goto end;
if (text) {
/* Text output. */
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 {
/* ASN.1 DER output. */
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);
/* Clean up. */
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;
/* Read PKCS7 object and extract the signed time stamp info. */
if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
goto end;
if ((tst_info = PKCS7_to_TS_TST_INFO(token)) == NULL)
goto end;
/* Creating response object. */
if ((resp = TS_RESP_new()) == NULL)
goto end;
/* Create granted status info. */
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;
/* Setting encapsulated token. */
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, char *queryfile, char *passin,
char *inkey, char *signer, 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;
/* Getting TSA configuration section. */
if ((section = TS_CONF_get_tsa_section(conf, section)) == NULL)
goto end;
/* Setting up response generation context. */
if ((resp_ctx = TS_RESP_CTX_new()) == NULL)
goto end;
/* Setting serial number provider callback. */
if (!TS_CONF_set_serial(conf, section, serial_cb, resp_ctx))
goto end;
/* Setting TSA signer certificate. */
if (!TS_CONF_set_signer_cert(conf, section, signer, resp_ctx))
goto end;
/* Setting TSA signer certificate chain. */
if (!TS_CONF_set_certs(conf, section, chain, resp_ctx))
goto end;
/* Setting TSA signer private key. */
if (!TS_CONF_set_signer_key(conf, section, inkey, passin, resp_ctx))
goto end;
/* Setting default policy OID. */
if (!TS_CONF_set_def_policy(conf, section, policy, resp_ctx))
goto end;
/* Setting acceptable policy OIDs. */
if (!TS_CONF_set_policies(conf, section, resp_ctx))
goto end;
/* Setting the acceptable one-way hash algorithms. */
if (!TS_CONF_set_digests(conf, section, resp_ctx))
goto end;
/* Setting guaranteed time stamp accuracy. */
if (!TS_CONF_set_accuracy(conf, section, resp_ctx))
goto end;
/* Setting the precision of the time. */
if (!TS_CONF_set_clock_precision_digits(conf, section, resp_ctx))
goto end;
/* Setting the ordering flaf if requested. */
if (!TS_CONF_set_ordering(conf, section, resp_ctx))
goto end;
/* Setting the TSA name required flag if requested. */
if (!TS_CONF_set_tsa_name(conf, section, resp_ctx))
goto end;
/* Setting the ESS cert id chain flag if requested. */
if (!TS_CONF_set_ess_cert_id_chain(conf, section, resp_ctx))
goto end;
/* Creating the response. */
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 == NULL) {
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(char *data, char *digest, char *queryfile, char *in,
int token_in, char *ca_path, char *ca_file, char *untrusted)
{
BIO *in_bio = NULL;
PKCS7 *token = NULL;
TS_RESP *response = NULL;
TS_VERIFY_CTX *verify_ctx = NULL;
int ret = 0;
/* Decode the token (PKCS7) or response (TS_RESP) files. */
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,
ca_path, ca_file, untrusted)) == NULL)
goto end;
/* Checking the token or response against the request. */
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");
/* Print errors, if there are any. */
ERR_print_errors(bio_err);
}
/* Clean up. */
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(char *data, char *digest, char *queryfile, char *ca_path,
char *ca_file, char *untrusted)
{
TS_VERIFY_CTX *ctx = NULL;
BIO *input = NULL;
TS_REQ *request = NULL;
X509_STORE *store;
STACK_OF(X509) *certs;
int ret = 0;
if (data != NULL || digest != NULL) {
if ((ctx = TS_VERIFY_CTX_new()) == NULL)
goto err;
TS_VERIFY_CTX_set_flags(ctx, TS_VFY_VERSION | TS_VFY_SIGNER);
if (data != NULL) {
BIO *data_bio;
TS_VERIFY_CTX_add_flags(ctx, TS_VFY_DATA);
if ((data_bio = BIO_new_file(data, "rb")) == NULL)
goto err;
TS_VERIFY_CTX_set_data(ctx, data_bio);
} else if (digest != NULL) {
unsigned char *imprint;
long imprint_len;
TS_VERIFY_CTX_add_flags(ctx, TS_VFY_IMPRINT);
if ((imprint = string_to_hex(digest,
&imprint_len)) == NULL) {
BIO_printf(bio_err, "invalid digest string\n");
goto err;
}
TS_VERIFY_CTX_set_imprint(ctx, imprint, imprint_len);
}
} else if (queryfile != NULL) {
/*
* The request has just to be read, decoded and converted to
* a verify context object.
*/
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, TS_VFY_SIGNATURE);
/* Initialising the X509_STORE object. */
if ((store = create_cert_store(ca_path, ca_file)) == NULL)
goto err;
TS_VERIFY_CTX_set_store(ctx, store);
/* Loading untrusted certificates. */
if (untrusted != NULL) {
if ((certs = TS_CONF_load_certs(untrusted)) == NULL)
goto err;
TS_VERIFY_CTX_set_certs(ctx, certs);
}
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(char *ca_path, char *ca_file)
{
X509_STORE *cert_ctx = NULL;
X509_LOOKUP *lookup = NULL;
int i;
/* Creating the X509_STORE object. */
if ((cert_ctx = X509_STORE_new()) == NULL)
goto err;
/* Setting the callback for certificate chain verification. */
X509_STORE_set_verify_cb(cert_ctx, verify_cb);
/* Adding a trusted certificate directory source. */
if (ca_path != 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, ca_path, X509_FILETYPE_PEM);
if (!i) {
BIO_printf(bio_err, "Error loading directory %s\n",
ca_path);
goto err;
}
}
/* Adding a trusted certificate file source. */
if (ca_file != 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, ca_file, X509_FILETYPE_PEM);
if (!i) {
BIO_printf(bio_err, "Error loading file %s\n", ca_file);
goto err;
}
}
return cert_ctx;
err:
X509_STORE_free(cert_ctx);
return NULL;
}
static int
verify_cb(int ok, X509_STORE_CTX *ctx)
{
/*
char buf[256];
if (!ok)
{
X509_NAME_oneline(X509_get_subject_name(ctx->current_cert),
buf, sizeof(buf));
printf("%s\n", buf);
printf("error %d at %d depth lookup: %s\n",
ctx->error, ctx->error_depth,
X509_verify_cert_error_string(ctx->error));
}
*/
return ok;
}
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