| /* 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, ".%06ld", 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; |
| } |
