diff options
Diffstat (limited to 'openssl/crypto/ts/ts_rsp_sign.c')
| -rw-r--r-- | openssl/crypto/ts/ts_rsp_sign.c | 1020 |
1 files changed, 1020 insertions, 0 deletions
diff --git a/openssl/crypto/ts/ts_rsp_sign.c b/openssl/crypto/ts/ts_rsp_sign.c new file mode 100644 index 000000000..b0f023c9d --- /dev/null +++ b/openssl/crypto/ts/ts_rsp_sign.c @@ -0,0 +1,1020 @@ +/* crypto/ts/ts_resp_sign.c */ +/* Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL + * project 2002. + */ +/* ==================================================================== + * Copyright (c) 2006 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 "cryptlib.h" + +#if defined(OPENSSL_SYS_UNIX) +#include <sys/time.h> +#endif + +#include <openssl/objects.h> +#include <openssl/ts.h> +#include <openssl/pkcs7.h> + +/* Private function declarations. */ + +static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *, void *); +static int def_time_cb(struct TS_resp_ctx *, void *, long *sec, long *usec); +static int def_extension_cb(struct TS_resp_ctx *, X509_EXTENSION *, void *); + +static void TS_RESP_CTX_init(TS_RESP_CTX *ctx); +static void TS_RESP_CTX_cleanup(TS_RESP_CTX *ctx); +static int TS_RESP_check_request(TS_RESP_CTX *ctx); +static ASN1_OBJECT *TS_RESP_get_policy(TS_RESP_CTX *ctx); +static TS_TST_INFO *TS_RESP_create_tst_info(TS_RESP_CTX *ctx, + ASN1_OBJECT *policy); +static int TS_RESP_process_extensions(TS_RESP_CTX *ctx); +static int TS_RESP_sign(TS_RESP_CTX *ctx); + +static ESS_SIGNING_CERT *ESS_SIGNING_CERT_new_init(X509 *signcert, + STACK_OF(X509) *certs); +static ESS_CERT_ID *ESS_CERT_ID_new_init(X509 *cert, int issuer_needed); +static int TS_TST_INFO_content_new(PKCS7 *p7); +static int ESS_add_signing_cert(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc); + +static ASN1_GENERALIZEDTIME *TS_RESP_set_genTime_with_precision( + ASN1_GENERALIZEDTIME *, long, long, unsigned); + +/* Default callbacks for response generation. */ + +static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *ctx, void *data) + { + ASN1_INTEGER *serial = ASN1_INTEGER_new(); + if (!serial) goto err; + if (!ASN1_INTEGER_set(serial, 1)) goto err; + return serial; + err: + TSerr(TS_F_DEF_SERIAL_CB, ERR_R_MALLOC_FAILURE); + TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, + "Error during serial number generation."); + return NULL; + } + +#if defined(OPENSSL_SYS_UNIX) + +/* Use the gettimeofday function call. */ +static int def_time_cb(struct TS_resp_ctx *ctx, void *data, + long *sec, long *usec) + { + struct timeval tv; + if (gettimeofday(&tv, NULL) != 0) + { + TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR); + TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, + "Time is not available."); + TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE); + return 0; + } + /* Return time to caller. */ + *sec = tv.tv_sec; + *usec = tv.tv_usec; + + return 1; + } + +#else + +/* Use the time function call that provides only seconds precision. */ +static int def_time_cb(struct TS_resp_ctx *ctx, void *data, + long *sec, long *usec) + { + time_t t; + if (time(&t) == (time_t) -1) + { + TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR); + TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, + "Time is not available."); + TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE); + return 0; + } + /* Return time to caller, only second precision. */ + *sec = (long) t; + *usec = 0; + + return 1; + } + +#endif + +static int def_extension_cb(struct TS_resp_ctx *ctx, X509_EXTENSION *ext, + void *data) + { + /* No extensions are processed here. */ + TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, + "Unsupported extension."); + TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_EXTENSION); + return 0; + } + +/* TS_RESP_CTX management functions. */ + +TS_RESP_CTX *TS_RESP_CTX_new() + { + TS_RESP_CTX *ctx; + + if (!(ctx = (TS_RESP_CTX *) OPENSSL_malloc(sizeof(TS_RESP_CTX)))) + { + TSerr(TS_F_TS_RESP_CTX_NEW, ERR_R_MALLOC_FAILURE); + return NULL; + } + memset(ctx, 0, sizeof(TS_RESP_CTX)); + + /* Setting default callbacks. */ + ctx->serial_cb = def_serial_cb; + ctx->time_cb = def_time_cb; + ctx->extension_cb = def_extension_cb; + + return ctx; + } + +void TS_RESP_CTX_free(TS_RESP_CTX *ctx) + { + if (!ctx) return; + + X509_free(ctx->signer_cert); + EVP_PKEY_free(ctx->signer_key); + sk_X509_pop_free(ctx->certs, X509_free); + sk_ASN1_OBJECT_pop_free(ctx->policies, ASN1_OBJECT_free); + ASN1_OBJECT_free(ctx->default_policy); + sk_EVP_MD_free(ctx->mds); /* No EVP_MD_free method exists. */ + ASN1_INTEGER_free(ctx->seconds); + ASN1_INTEGER_free(ctx->millis); + ASN1_INTEGER_free(ctx->micros); + OPENSSL_free(ctx); + } + +int TS_RESP_CTX_set_signer_cert(TS_RESP_CTX *ctx, X509 *signer) + { + if (X509_check_purpose(signer, X509_PURPOSE_TIMESTAMP_SIGN, 0) != 1) + { + TSerr(TS_F_TS_RESP_CTX_SET_SIGNER_CERT, + TS_R_INVALID_SIGNER_CERTIFICATE_PURPOSE); + return 0; + } + if (ctx->signer_cert) X509_free(ctx->signer_cert); + ctx->signer_cert = signer; + CRYPTO_add(&ctx->signer_cert->references, +1, CRYPTO_LOCK_X509); + return 1; + } + +int TS_RESP_CTX_set_signer_key(TS_RESP_CTX *ctx, EVP_PKEY *key) + { + if (ctx->signer_key) EVP_PKEY_free(ctx->signer_key); + ctx->signer_key = key; + CRYPTO_add(&ctx->signer_key->references, +1, CRYPTO_LOCK_EVP_PKEY); + + return 1; + } + +int TS_RESP_CTX_set_def_policy(TS_RESP_CTX *ctx, ASN1_OBJECT *def_policy) + { + if (ctx->default_policy) ASN1_OBJECT_free(ctx->default_policy); + if (!(ctx->default_policy = OBJ_dup(def_policy))) goto err; + return 1; + err: + TSerr(TS_F_TS_RESP_CTX_SET_DEF_POLICY, ERR_R_MALLOC_FAILURE); + return 0; + } + +int TS_RESP_CTX_set_certs(TS_RESP_CTX *ctx, STACK_OF(X509) *certs) + { + int i; + + if (ctx->certs) + { + sk_X509_pop_free(ctx->certs, X509_free); + ctx->certs = NULL; + } + if (!certs) return 1; + if (!(ctx->certs = sk_X509_dup(certs))) + { + TSerr(TS_F_TS_RESP_CTX_SET_CERTS, ERR_R_MALLOC_FAILURE); + return 0; + } + for (i = 0; i < sk_X509_num(ctx->certs); ++i) + { + X509 *cert = sk_X509_value(ctx->certs, i); + CRYPTO_add(&cert->references, +1, CRYPTO_LOCK_X509); + } + + return 1; + } + +int TS_RESP_CTX_add_policy(TS_RESP_CTX *ctx, ASN1_OBJECT *policy) + { + ASN1_OBJECT *copy = NULL; + + /* Create new policy stack if necessary. */ + if (!ctx->policies && !(ctx->policies = sk_ASN1_OBJECT_new_null())) + goto err; + if (!(copy = OBJ_dup(policy))) goto err; + if (!sk_ASN1_OBJECT_push(ctx->policies, copy)) goto err; + + return 1; + err: + TSerr(TS_F_TS_RESP_CTX_ADD_POLICY, ERR_R_MALLOC_FAILURE); + ASN1_OBJECT_free(copy); + return 0; + } + +int TS_RESP_CTX_add_md(TS_RESP_CTX *ctx, const EVP_MD *md) + { + /* Create new md stack if necessary. */ + if (!ctx->mds && !(ctx->mds = sk_EVP_MD_new_null())) + goto err; + /* Add the shared md, no copy needed. */ + if (!sk_EVP_MD_push(ctx->mds, (EVP_MD *)md)) goto err; + + return 1; + err: + TSerr(TS_F_TS_RESP_CTX_ADD_MD, ERR_R_MALLOC_FAILURE); + return 0; + } + +#define TS_RESP_CTX_accuracy_free(ctx) \ + ASN1_INTEGER_free(ctx->seconds); \ + ctx->seconds = NULL; \ + ASN1_INTEGER_free(ctx->millis); \ + ctx->millis = NULL; \ + ASN1_INTEGER_free(ctx->micros); \ + ctx->micros = NULL; + +int TS_RESP_CTX_set_accuracy(TS_RESP_CTX *ctx, + int secs, int millis, int micros) + { + + TS_RESP_CTX_accuracy_free(ctx); + if (secs && (!(ctx->seconds = ASN1_INTEGER_new()) + || !ASN1_INTEGER_set(ctx->seconds, secs))) + goto err; + if (millis && (!(ctx->millis = ASN1_INTEGER_new()) + || !ASN1_INTEGER_set(ctx->millis, millis))) + goto err; + if (micros && (!(ctx->micros = ASN1_INTEGER_new()) + || !ASN1_INTEGER_set(ctx->micros, micros))) + goto err; + + return 1; + err: + TS_RESP_CTX_accuracy_free(ctx); + TSerr(TS_F_TS_RESP_CTX_SET_ACCURACY, ERR_R_MALLOC_FAILURE); + return 0; + } + +void TS_RESP_CTX_add_flags(TS_RESP_CTX *ctx, int flags) + { + ctx->flags |= flags; + } + +void TS_RESP_CTX_set_serial_cb(TS_RESP_CTX *ctx, TS_serial_cb cb, void *data) + { + ctx->serial_cb = cb; + ctx->serial_cb_data = data; + } + +void TS_RESP_CTX_set_time_cb(TS_RESP_CTX *ctx, TS_time_cb cb, void *data) + { + ctx->time_cb = cb; + ctx->time_cb_data = data; + } + +void TS_RESP_CTX_set_extension_cb(TS_RESP_CTX *ctx, + TS_extension_cb cb, void *data) + { + ctx->extension_cb = cb; + ctx->extension_cb_data = data; + } + +int TS_RESP_CTX_set_status_info(TS_RESP_CTX *ctx, + int status, const char *text) + { + TS_STATUS_INFO *si = NULL; + ASN1_UTF8STRING *utf8_text = NULL; + int ret = 0; + + if (!(si = TS_STATUS_INFO_new())) goto err; + if (!ASN1_INTEGER_set(si->status, status)) goto err; + if (text) + { + if (!(utf8_text = ASN1_UTF8STRING_new()) + || !ASN1_STRING_set(utf8_text, text, strlen(text))) + goto err; + if (!si->text && !(si->text = sk_ASN1_UTF8STRING_new_null())) + goto err; + if (!sk_ASN1_UTF8STRING_push(si->text, utf8_text)) goto err; + utf8_text = NULL; /* Ownership is lost. */ + } + if (!TS_RESP_set_status_info(ctx->response, si)) goto err; + ret = 1; + err: + if (!ret) + TSerr(TS_F_TS_RESP_CTX_SET_STATUS_INFO, ERR_R_MALLOC_FAILURE); + TS_STATUS_INFO_free(si); + ASN1_UTF8STRING_free(utf8_text); + return ret; + } + +int TS_RESP_CTX_set_status_info_cond(TS_RESP_CTX *ctx, + int status, const char *text) + { + int ret = 1; + TS_STATUS_INFO *si = TS_RESP_get_status_info(ctx->response); + + if (ASN1_INTEGER_get(si->status) == TS_STATUS_GRANTED) + { + /* Status has not been set, set it now. */ + ret = TS_RESP_CTX_set_status_info(ctx, status, text); + } + return ret; + } + +int TS_RESP_CTX_add_failure_info(TS_RESP_CTX *ctx, int failure) + { + TS_STATUS_INFO *si = TS_RESP_get_status_info(ctx->response); + if (!si->failure_info && !(si->failure_info = ASN1_BIT_STRING_new())) + goto err; + if (!ASN1_BIT_STRING_set_bit(si->failure_info, failure, 1)) + goto err; + return 1; + err: + TSerr(TS_F_TS_RESP_CTX_ADD_FAILURE_INFO, ERR_R_MALLOC_FAILURE); + return 0; + } + +TS_REQ *TS_RESP_CTX_get_request(TS_RESP_CTX *ctx) + { + return ctx->request; + } + +TS_TST_INFO *TS_RESP_CTX_get_tst_info(TS_RESP_CTX *ctx) + { + return ctx->tst_info; + } + +int TS_RESP_CTX_set_clock_precision_digits(TS_RESP_CTX *ctx, unsigned precision) + { + if (precision > TS_MAX_CLOCK_PRECISION_DIGITS) + return 0; + ctx->clock_precision_digits = precision; + return 1; + } + +/* Main entry method of the response generation. */ +TS_RESP *TS_RESP_create_response(TS_RESP_CTX *ctx, BIO *req_bio) + { + ASN1_OBJECT *policy; + TS_RESP *response; + int result = 0; + + TS_RESP_CTX_init(ctx); + + /* Creating the response object. */ + if (!(ctx->response = TS_RESP_new())) + { + TSerr(TS_F_TS_RESP_CREATE_RESPONSE, ERR_R_MALLOC_FAILURE); + goto end; + } + + /* Parsing DER request. */ + if (!(ctx->request = d2i_TS_REQ_bio(req_bio, NULL))) + { + TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, + "Bad request format or " + "system error."); + TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT); + goto end; + } + + /* Setting default status info. */ + if (!TS_RESP_CTX_set_status_info(ctx, TS_STATUS_GRANTED, NULL)) + goto end; + + /* Checking the request format. */ + if (!TS_RESP_check_request(ctx)) goto end; + + /* Checking acceptable policies. */ + if (!(policy = TS_RESP_get_policy(ctx))) goto end; + + /* Creating the TS_TST_INFO object. */ + if (!(ctx->tst_info = TS_RESP_create_tst_info(ctx, policy))) + goto end; + + /* Processing extensions. */ + if (!TS_RESP_process_extensions(ctx)) goto end; + + /* Generating the signature. */ + if (!TS_RESP_sign(ctx)) goto end; + + /* Everything was successful. */ + result = 1; + end: + if (!result) + { + TSerr(TS_F_TS_RESP_CREATE_RESPONSE, TS_R_RESPONSE_SETUP_ERROR); + if (ctx->response != NULL) + { + if (TS_RESP_CTX_set_status_info_cond(ctx, + TS_STATUS_REJECTION, "Error during response " + "generation.") == 0) + { + TS_RESP_free(ctx->response); + ctx->response = NULL; + } + } + } + response = ctx->response; + ctx->response = NULL; /* Ownership will be returned to caller. */ + TS_RESP_CTX_cleanup(ctx); + return response; + } + +/* Initializes the variable part of the context. */ +static void TS_RESP_CTX_init(TS_RESP_CTX *ctx) + { + ctx->request = NULL; + ctx->response = NULL; + ctx->tst_info = NULL; + } + +/* Cleans up the variable part of the context. */ +static void TS_RESP_CTX_cleanup(TS_RESP_CTX *ctx) + { + TS_REQ_free(ctx->request); + ctx->request = NULL; + TS_RESP_free(ctx->response); + ctx->response = NULL; + TS_TST_INFO_free(ctx->tst_info); + ctx->tst_info = NULL; + } + +/* Checks the format and content of the request. */ +static int TS_RESP_check_request(TS_RESP_CTX *ctx) + { + TS_REQ *request = ctx->request; + TS_MSG_IMPRINT *msg_imprint; + X509_ALGOR *md_alg; + int md_alg_id; + const ASN1_OCTET_STRING *digest; + EVP_MD *md = NULL; + int i; + + /* Checking request version. */ + if (TS_REQ_get_version(request) != 1) + { + TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, + "Bad request version."); + TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_REQUEST); + return 0; + } + + /* Checking message digest algorithm. */ + msg_imprint = TS_REQ_get_msg_imprint(request); + md_alg = TS_MSG_IMPRINT_get_algo(msg_imprint); + md_alg_id = OBJ_obj2nid(md_alg->algorithm); + for (i = 0; !md && i < sk_EVP_MD_num(ctx->mds); ++i) + { + EVP_MD *current_md = sk_EVP_MD_value(ctx->mds, i); + if (md_alg_id == EVP_MD_type(current_md)) + md = current_md; + } + if (!md) + { + TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, + "Message digest algorithm is " + "not supported."); + TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG); + return 0; + } + + /* No message digest takes parameter. */ + if (md_alg->parameter + && ASN1_TYPE_get(md_alg->parameter) != V_ASN1_NULL) + { + TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, + "Superfluous message digest " + "parameter."); + TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_ALG); + return 0; + } + /* Checking message digest size. */ + digest = TS_MSG_IMPRINT_get_msg(msg_imprint); + if (digest->length != EVP_MD_size(md)) + { + TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, + "Bad message digest."); + TS_RESP_CTX_add_failure_info(ctx, TS_INFO_BAD_DATA_FORMAT); + return 0; + } + + return 1; + } + +/* Returns the TSA policy based on the requested and acceptable policies. */ +static ASN1_OBJECT *TS_RESP_get_policy(TS_RESP_CTX *ctx) + { + ASN1_OBJECT *requested = TS_REQ_get_policy_id(ctx->request); + ASN1_OBJECT *policy = NULL; + int i; + + if (ctx->default_policy == NULL) + { + TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_INVALID_NULL_POINTER); + return NULL; + } + /* Return the default policy if none is requested or the default is + requested. */ + if (!requested || !OBJ_cmp(requested, ctx->default_policy)) + policy = ctx->default_policy; + + /* Check if the policy is acceptable. */ + for (i = 0; !policy && i < sk_ASN1_OBJECT_num(ctx->policies); ++i) + { + ASN1_OBJECT *current = sk_ASN1_OBJECT_value(ctx->policies, i); + if (!OBJ_cmp(requested, current)) + policy = current; + } + if (!policy) + { + TSerr(TS_F_TS_RESP_GET_POLICY, TS_R_UNACCEPTABLE_POLICY); + TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, + "Requested policy is not " + "supported."); + TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_POLICY); + } + return policy; + } + +/* Creates the TS_TST_INFO object based on the settings of the context. */ +static TS_TST_INFO *TS_RESP_create_tst_info(TS_RESP_CTX *ctx, + ASN1_OBJECT *policy) + { + int result = 0; + TS_TST_INFO *tst_info = NULL; + ASN1_INTEGER *serial = NULL; + ASN1_GENERALIZEDTIME *asn1_time = NULL; + long sec, usec; + TS_ACCURACY *accuracy = NULL; + const ASN1_INTEGER *nonce; + GENERAL_NAME *tsa_name = NULL; + + if (!(tst_info = TS_TST_INFO_new())) goto end; + if (!TS_TST_INFO_set_version(tst_info, 1)) goto end; + if (!TS_TST_INFO_set_policy_id(tst_info, policy)) goto end; + if (!TS_TST_INFO_set_msg_imprint(tst_info, ctx->request->msg_imprint)) + goto end; + if (!(serial = (*ctx->serial_cb)(ctx, ctx->serial_cb_data)) + || !TS_TST_INFO_set_serial(tst_info, serial)) + goto end; + if (!(*ctx->time_cb)(ctx, ctx->time_cb_data, &sec, &usec) + || !(asn1_time = TS_RESP_set_genTime_with_precision(NULL, + sec, usec, + ctx->clock_precision_digits)) + || !TS_TST_INFO_set_time(tst_info, asn1_time)) + goto end; + + /* Setting accuracy if needed. */ + if ((ctx->seconds || ctx->millis || ctx->micros) + && !(accuracy = TS_ACCURACY_new())) + goto end; + + if (ctx->seconds && !TS_ACCURACY_set_seconds(accuracy, ctx->seconds)) + goto end; + if (ctx->millis && !TS_ACCURACY_set_millis(accuracy, ctx->millis)) + goto end; + if (ctx->micros && !TS_ACCURACY_set_micros(accuracy, ctx->micros)) + goto end; + if (accuracy && !TS_TST_INFO_set_accuracy(tst_info, accuracy)) + goto end; + + /* Setting ordering. */ + if ((ctx->flags & TS_ORDERING) + && !TS_TST_INFO_set_ordering(tst_info, 1)) + goto end; + + /* Setting nonce if needed. */ + if ((nonce = TS_REQ_get_nonce(ctx->request)) != NULL + && !TS_TST_INFO_set_nonce(tst_info, nonce)) + goto end; + + /* Setting TSA name to subject of signer certificate. */ + if (ctx->flags & TS_TSA_NAME) + { + if (!(tsa_name = GENERAL_NAME_new())) goto end; + tsa_name->type = GEN_DIRNAME; + tsa_name->d.dirn = + X509_NAME_dup(ctx->signer_cert->cert_info->subject); + if (!tsa_name->d.dirn) goto end; + if (!TS_TST_INFO_set_tsa(tst_info, tsa_name)) goto end; + } + + result = 1; + end: + if (!result) + { + TS_TST_INFO_free(tst_info); + tst_info = NULL; + TSerr(TS_F_TS_RESP_CREATE_TST_INFO, TS_R_TST_INFO_SETUP_ERROR); + TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION, + "Error during TSTInfo " + "generation."); + } + GENERAL_NAME_free(tsa_name); + TS_ACCURACY_free(accuracy); + ASN1_GENERALIZEDTIME_free(asn1_time); + ASN1_INTEGER_free(serial); + + return tst_info; + } + +/* Processing the extensions of the request. */ +static int TS_RESP_process_extensions(TS_RESP_CTX *ctx) + { + STACK_OF(X509_EXTENSION) *exts = TS_REQ_get_exts(ctx->request); + int i; + int ok = 1; + + for (i = 0; ok && i < sk_X509_EXTENSION_num(exts); ++i) + { + X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i); + /* XXXXX The last argument was previously + (void *)ctx->extension_cb, but ISO C doesn't permit + converting a function pointer to void *. For lack of + better information, I'm placing a NULL there instead. + The callback can pick its own address out from the ctx + anyway... + */ + ok = (*ctx->extension_cb)(ctx, ext, NULL); + } + + return ok; + } + +/* Functions for signing the TS_TST_INFO structure of the context. */ +static int TS_RESP_sign(TS_RESP_CTX *ctx) + { + int ret = 0; + PKCS7 *p7 = NULL; + PKCS7_SIGNER_INFO *si; + STACK_OF(X509) *certs; /* Certificates to include in sc. */ + ESS_SIGNING_CERT *sc = NULL; + ASN1_OBJECT *oid; + BIO *p7bio = NULL; + int i; + + /* Check if signcert and pkey match. */ + if (!X509_check_private_key(ctx->signer_cert, ctx->signer_key)) { + TSerr(TS_F_TS_RESP_SIGN, + TS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); + goto err; + } + + /* Create a new PKCS7 signed object. */ + if (!(p7 = PKCS7_new())) { + TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE); + goto err; + } + if (!PKCS7_set_type(p7, NID_pkcs7_signed)) goto err; + + /* Force SignedData version to be 3 instead of the default 1. */ + if (!ASN1_INTEGER_set(p7->d.sign->version, 3)) goto err; + + /* Add signer certificate and optional certificate chain. */ + if (TS_REQ_get_cert_req(ctx->request)) + { + PKCS7_add_certificate(p7, ctx->signer_cert); + if (ctx->certs) + { + for(i = 0; i < sk_X509_num(ctx->certs); ++i) + { + X509 *cert = sk_X509_value(ctx->certs, i); + PKCS7_add_certificate(p7, cert); + } + } + } + + /* Add a new signer info. */ + if (!(si = PKCS7_add_signature(p7, ctx->signer_cert, + ctx->signer_key, EVP_sha1()))) + { + TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNATURE_ERROR); + goto err; + } + + /* Add content type signed attribute to the signer info. */ + oid = OBJ_nid2obj(NID_id_smime_ct_TSTInfo); + if (!PKCS7_add_signed_attribute(si, NID_pkcs9_contentType, + V_ASN1_OBJECT, oid)) + { + TSerr(TS_F_TS_RESP_SIGN, TS_R_PKCS7_ADD_SIGNED_ATTR_ERROR); + goto err; + } + + /* Create the ESS SigningCertificate attribute which contains + the signer certificate id and optionally the certificate chain. */ + certs = ctx->flags & TS_ESS_CERT_ID_CHAIN ? ctx->certs : NULL; + if (!(sc = ESS_SIGNING_CERT_new_init(ctx->signer_cert, certs))) + goto err; + + /* Add SigningCertificate signed attribute to the signer info. */ + if (!ESS_add_signing_cert(si, sc)) + { + TSerr(TS_F_TS_RESP_SIGN, TS_R_ESS_ADD_SIGNING_CERT_ERROR); + goto err; + } + + /* Add a new empty NID_id_smime_ct_TSTInfo encapsulated content. */ + if (!TS_TST_INFO_content_new(p7)) goto err; + + /* Add the DER encoded tst_info to the PKCS7 structure. */ + if (!(p7bio = PKCS7_dataInit(p7, NULL))) { + TSerr(TS_F_TS_RESP_SIGN, ERR_R_MALLOC_FAILURE); + goto err; + } + + /* Convert tst_info to DER. */ + if (!i2d_TS_TST_INFO_bio(p7bio, ctx->tst_info)) + { + TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN); + goto err; + } + + /* Create the signature and add it to the signer info. */ + if (!PKCS7_dataFinal(p7, p7bio)) + { + TSerr(TS_F_TS_RESP_SIGN, TS_R_TS_DATASIGN); + goto err; + } + + /* Set new PKCS7 and TST_INFO objects. */ + TS_RESP_set_tst_info(ctx->response, p7, ctx->tst_info); + p7 = NULL; /* Ownership is lost. */ + ctx->tst_info = NULL; /* Ownership is lost. */ + + ret = 1; + err: + if (!ret) + TS_RESP_CTX_set_status_info_cond(ctx, TS_STATUS_REJECTION, + "Error during signature " + "generation."); + BIO_free_all(p7bio); + ESS_SIGNING_CERT_free(sc); + PKCS7_free(p7); + return ret; + } + +static ESS_SIGNING_CERT *ESS_SIGNING_CERT_new_init(X509 *signcert, + STACK_OF(X509) *certs) + { + ESS_CERT_ID *cid; + ESS_SIGNING_CERT *sc = NULL; + int i; + + /* Creating the ESS_CERT_ID stack. */ + if (!(sc = ESS_SIGNING_CERT_new())) goto err; + if (!sc->cert_ids && !(sc->cert_ids = sk_ESS_CERT_ID_new_null())) + goto err; + + /* Adding the signing certificate id. */ + if (!(cid = ESS_CERT_ID_new_init(signcert, 0)) + || !sk_ESS_CERT_ID_push(sc->cert_ids, cid)) + goto err; + /* Adding the certificate chain ids. */ + for (i = 0; i < sk_X509_num(certs); ++i) + { + X509 *cert = sk_X509_value(certs, i); + if (!(cid = ESS_CERT_ID_new_init(cert, 1)) + || !sk_ESS_CERT_ID_push(sc->cert_ids, cid)) + goto err; + } + + return sc; +err: + ESS_SIGNING_CERT_free(sc); + TSerr(TS_F_ESS_SIGNING_CERT_NEW_INIT, ERR_R_MALLOC_FAILURE); + return NULL; + } + +static ESS_CERT_ID *ESS_CERT_ID_new_init(X509 *cert, int issuer_needed) + { + ESS_CERT_ID *cid = NULL; + GENERAL_NAME *name = NULL; + + /* Recompute SHA1 hash of certificate if necessary (side effect). */ + X509_check_purpose(cert, -1, 0); + + if (!(cid = ESS_CERT_ID_new())) goto err; + if (!ASN1_OCTET_STRING_set(cid->hash, cert->sha1_hash, + sizeof(cert->sha1_hash))) + goto err; + + /* Setting the issuer/serial if requested. */ + if (issuer_needed) + { + /* Creating issuer/serial structure. */ + if (!cid->issuer_serial + && !(cid->issuer_serial = ESS_ISSUER_SERIAL_new())) + goto err; + /* Creating general name from the certificate issuer. */ + if (!(name = GENERAL_NAME_new())) goto err; + name->type = GEN_DIRNAME; + if (!(name->d.dirn = X509_NAME_dup(cert->cert_info->issuer))) + goto err; + if (!sk_GENERAL_NAME_push(cid->issuer_serial->issuer, name)) + goto err; + name = NULL; /* Ownership is lost. */ + /* Setting the serial number. */ + ASN1_INTEGER_free(cid->issuer_serial->serial); + if (!(cid->issuer_serial->serial = + ASN1_INTEGER_dup(cert->cert_info->serialNumber))) + goto err; + } + + return cid; +err: + GENERAL_NAME_free(name); + ESS_CERT_ID_free(cid); + TSerr(TS_F_ESS_CERT_ID_NEW_INIT, ERR_R_MALLOC_FAILURE); + return NULL; + } + +static int TS_TST_INFO_content_new(PKCS7 *p7) + { + PKCS7 *ret = NULL; + ASN1_OCTET_STRING *octet_string = NULL; + + /* Create new encapsulated NID_id_smime_ct_TSTInfo content. */ + if (!(ret = PKCS7_new())) goto err; + if (!(ret->d.other = ASN1_TYPE_new())) goto err; + ret->type = OBJ_nid2obj(NID_id_smime_ct_TSTInfo); + if (!(octet_string = ASN1_OCTET_STRING_new())) goto err; + ASN1_TYPE_set(ret->d.other, V_ASN1_OCTET_STRING, octet_string); + octet_string = NULL; + + /* Add encapsulated content to signed PKCS7 structure. */ + if (!PKCS7_set_content(p7, ret)) goto err; + + return 1; + err: + ASN1_OCTET_STRING_free(octet_string); + PKCS7_free(ret); + return 0; + } + +static int ESS_add_signing_cert(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc) + { + ASN1_STRING *seq = NULL; + unsigned char *p, *pp = NULL; + int len; + + len = i2d_ESS_SIGNING_CERT(sc, NULL); + if (!(pp = (unsigned char *) OPENSSL_malloc(len))) + { + TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE); + goto err; + } + p = pp; + i2d_ESS_SIGNING_CERT(sc, &p); + if (!(seq = ASN1_STRING_new()) || !ASN1_STRING_set(seq, pp, len)) + { + TSerr(TS_F_ESS_ADD_SIGNING_CERT, ERR_R_MALLOC_FAILURE); + goto err; + } + OPENSSL_free(pp); pp = NULL; + return PKCS7_add_signed_attribute(si, + NID_id_smime_aa_signingCertificate, + V_ASN1_SEQUENCE, seq); + err: + ASN1_STRING_free(seq); + OPENSSL_free(pp); + + return 0; + } + + +static ASN1_GENERALIZEDTIME * +TS_RESP_set_genTime_with_precision(ASN1_GENERALIZEDTIME *asn1_time, + long sec, long usec, unsigned precision) + { + time_t time_sec = (time_t) sec; + struct tm *tm = NULL; + char genTime_str[17 + TS_MAX_CLOCK_PRECISION_DIGITS]; + char *p = genTime_str; + char *p_end = genTime_str + sizeof(genTime_str); + + if (precision > TS_MAX_CLOCK_PRECISION_DIGITS) + goto err; + + + if (!(tm = gmtime(&time_sec))) + goto err; + + /* + * Put "genTime_str" in GeneralizedTime format. We work around the + * restrictions imposed by rfc3280 (i.e. "GeneralizedTime values MUST + * NOT include fractional seconds") and OpenSSL related functions to + * meet the rfc3161 requirement: "GeneralizedTime syntax can include + * fraction-of-second details". + */ + p += BIO_snprintf(p, p_end - p, + "%04d%02d%02d%02d%02d%02d", + tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, + tm->tm_hour, tm->tm_min, tm->tm_sec); + if (precision > 0) + { + /* Add fraction of seconds (leave space for dot and null). */ + BIO_snprintf(p, 2 + precision, ".%ld", usec); + /* We cannot use the snprintf return value, + because it might have been truncated. */ + p += strlen(p); + + /* To make things a bit harder, X.690 | ISO/IEC 8825-1 provides + the following restrictions for a DER-encoding, which OpenSSL + (specifically ASN1_GENERALIZEDTIME_check() function) doesn't + support: + "The encoding MUST terminate with a "Z" (which means "Zulu" + time). The decimal point element, if present, MUST be the + point option ".". The fractional-seconds elements, + if present, MUST omit all trailing 0's; + if the elements correspond to 0, they MUST be wholly + omitted, and the decimal point element also MUST be + omitted." */ + /* Remove trailing zeros. The dot guarantees the exit + condition of this loop even if all the digits are zero. */ + while (*--p == '0') + /* empty */; + /* p points to either the dot or the last non-zero digit. */ + if (*p != '.') ++p; + } + /* Add the trailing Z and the terminating null. */ + *p++ = 'Z'; + *p++ = '\0'; + + /* Now call OpenSSL to check and set our genTime value */ + if (!asn1_time && !(asn1_time = M_ASN1_GENERALIZEDTIME_new())) + goto err; + if (!ASN1_GENERALIZEDTIME_set_string(asn1_time, genTime_str)) + { + ASN1_GENERALIZEDTIME_free(asn1_time); + goto err; + } + + return asn1_time; + err: + TSerr(TS_F_TS_RESP_SET_GENTIME_WITH_PRECISION, TS_R_COULD_NOT_SET_TIME); + return NULL; + } |