/* $OpenBSD: ts.c,v 1.29 2024/08/26 18:40:50 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 #include #include #include "apps.h" #include #include #include #include #include /* 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 **out_md_value) { EVP_MD_CTX *md_ctx = NULL; unsigned char *md_value = NULL; int md_value_len; int ret = 0; 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; } 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) { BIO_printf(bio_err, "bad digest, %d bytes " "must be specified\n", md_value_len); goto err; } } *out_md_value = md_value; md_value = NULL; ret = md_value_len; err: free(md_value); EVP_MD_CTX_free(md_ctx); return ret; } 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 flag 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; }