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1020 lines
29 KiB
1020 lines
29 KiB
/* crypto/ts/ts_resp_sign.c */
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/* Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL
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* project 2002.
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*/
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/* ====================================================================
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* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include "cryptlib.h"
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#if defined(OPENSSL_SYS_UNIX)
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#include <sys/time.h>
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#endif
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#include <openssl/objects.h>
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#include <openssl/ts.h>
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#include <openssl/pkcs7.h>
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/* Private function declarations. */
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static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *, void *);
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static int def_time_cb(struct TS_resp_ctx *, void *, long *sec, long *usec);
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static int def_extension_cb(struct TS_resp_ctx *, X509_EXTENSION *, void *);
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static void TS_RESP_CTX_init(TS_RESP_CTX *ctx);
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static void TS_RESP_CTX_cleanup(TS_RESP_CTX *ctx);
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static int TS_RESP_check_request(TS_RESP_CTX *ctx);
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static ASN1_OBJECT *TS_RESP_get_policy(TS_RESP_CTX *ctx);
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static TS_TST_INFO *TS_RESP_create_tst_info(TS_RESP_CTX *ctx,
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ASN1_OBJECT *policy);
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static int TS_RESP_process_extensions(TS_RESP_CTX *ctx);
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static int TS_RESP_sign(TS_RESP_CTX *ctx);
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static ESS_SIGNING_CERT *ESS_SIGNING_CERT_new_init(X509 *signcert,
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STACK_OF(X509) *certs);
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static ESS_CERT_ID *ESS_CERT_ID_new_init(X509 *cert, int issuer_needed);
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static int TS_TST_INFO_content_new(PKCS7 *p7);
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static int ESS_add_signing_cert(PKCS7_SIGNER_INFO *si, ESS_SIGNING_CERT *sc);
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static ASN1_GENERALIZEDTIME *TS_RESP_set_genTime_with_precision(
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ASN1_GENERALIZEDTIME *, long, long, unsigned);
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/* Default callbacks for response generation. */
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static ASN1_INTEGER *def_serial_cb(struct TS_resp_ctx *ctx, void *data)
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{
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ASN1_INTEGER *serial = ASN1_INTEGER_new();
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if (!serial) goto err;
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if (!ASN1_INTEGER_set(serial, 1)) goto err;
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return serial;
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err:
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TSerr(TS_F_DEF_SERIAL_CB, ERR_R_MALLOC_FAILURE);
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TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
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"Error during serial number generation.");
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return NULL;
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}
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#if defined(OPENSSL_SYS_UNIX)
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/* Use the gettimeofday function call. */
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static int def_time_cb(struct TS_resp_ctx *ctx, void *data,
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long *sec, long *usec)
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{
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struct timeval tv;
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if (gettimeofday(&tv, NULL) != 0)
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{
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TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR);
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TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
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"Time is not available.");
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TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE);
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return 0;
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}
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/* Return time to caller. */
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*sec = tv.tv_sec;
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*usec = tv.tv_usec;
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return 1;
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}
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#else
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/* Use the time function call that provides only seconds precision. */
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static int def_time_cb(struct TS_resp_ctx *ctx, void *data,
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long *sec, long *usec)
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{
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time_t t;
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if (time(&t) == (time_t) -1)
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{
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TSerr(TS_F_DEF_TIME_CB, TS_R_TIME_SYSCALL_ERROR);
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TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
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"Time is not available.");
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TS_RESP_CTX_add_failure_info(ctx, TS_INFO_TIME_NOT_AVAILABLE);
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return 0;
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}
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/* Return time to caller, only second precision. */
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*sec = (long) t;
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*usec = 0;
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return 1;
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}
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#endif
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static int def_extension_cb(struct TS_resp_ctx *ctx, X509_EXTENSION *ext,
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void *data)
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{
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/* No extensions are processed here. */
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TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
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"Unsupported extension.");
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TS_RESP_CTX_add_failure_info(ctx, TS_INFO_UNACCEPTED_EXTENSION);
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return 0;
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}
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/* TS_RESP_CTX management functions. */
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TS_RESP_CTX *TS_RESP_CTX_new()
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{
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TS_RESP_CTX *ctx;
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if (!(ctx = (TS_RESP_CTX *) OPENSSL_malloc(sizeof(TS_RESP_CTX))))
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{
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TSerr(TS_F_TS_RESP_CTX_NEW, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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memset(ctx, 0, sizeof(TS_RESP_CTX));
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/* Setting default callbacks. */
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ctx->serial_cb = def_serial_cb;
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ctx->time_cb = def_time_cb;
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ctx->extension_cb = def_extension_cb;
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return ctx;
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}
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void TS_RESP_CTX_free(TS_RESP_CTX *ctx)
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{
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if (!ctx) return;
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X509_free(ctx->signer_cert);
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EVP_PKEY_free(ctx->signer_key);
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sk_X509_pop_free(ctx->certs, X509_free);
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sk_ASN1_OBJECT_pop_free(ctx->policies, ASN1_OBJECT_free);
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ASN1_OBJECT_free(ctx->default_policy);
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sk_EVP_MD_free(ctx->mds); /* No EVP_MD_free method exists. */
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ASN1_INTEGER_free(ctx->seconds);
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ASN1_INTEGER_free(ctx->millis);
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ASN1_INTEGER_free(ctx->micros);
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OPENSSL_free(ctx);
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}
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int TS_RESP_CTX_set_signer_cert(TS_RESP_CTX *ctx, X509 *signer)
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{
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if (X509_check_purpose(signer, X509_PURPOSE_TIMESTAMP_SIGN, 0) != 1)
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{
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TSerr(TS_F_TS_RESP_CTX_SET_SIGNER_CERT,
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TS_R_INVALID_SIGNER_CERTIFICATE_PURPOSE);
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return 0;
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}
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if (ctx->signer_cert) X509_free(ctx->signer_cert);
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ctx->signer_cert = signer;
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CRYPTO_add(&ctx->signer_cert->references, +1, CRYPTO_LOCK_X509);
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return 1;
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}
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int TS_RESP_CTX_set_signer_key(TS_RESP_CTX *ctx, EVP_PKEY *key)
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{
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if (ctx->signer_key) EVP_PKEY_free(ctx->signer_key);
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ctx->signer_key = key;
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CRYPTO_add(&ctx->signer_key->references, +1, CRYPTO_LOCK_EVP_PKEY);
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return 1;
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}
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int TS_RESP_CTX_set_def_policy(TS_RESP_CTX *ctx, ASN1_OBJECT *def_policy)
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{
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if (ctx->default_policy) ASN1_OBJECT_free(ctx->default_policy);
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if (!(ctx->default_policy = OBJ_dup(def_policy))) goto err;
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return 1;
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err:
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TSerr(TS_F_TS_RESP_CTX_SET_DEF_POLICY, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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int TS_RESP_CTX_set_certs(TS_RESP_CTX *ctx, STACK_OF(X509) *certs)
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{
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int i;
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if (ctx->certs)
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{
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sk_X509_pop_free(ctx->certs, X509_free);
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ctx->certs = NULL;
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}
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if (!certs) return 1;
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if (!(ctx->certs = sk_X509_dup(certs)))
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{
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TSerr(TS_F_TS_RESP_CTX_SET_CERTS, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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for (i = 0; i < sk_X509_num(ctx->certs); ++i)
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{
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X509 *cert = sk_X509_value(ctx->certs, i);
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CRYPTO_add(&cert->references, +1, CRYPTO_LOCK_X509);
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}
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return 1;
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}
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int TS_RESP_CTX_add_policy(TS_RESP_CTX *ctx, ASN1_OBJECT *policy)
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{
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ASN1_OBJECT *copy = NULL;
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/* Create new policy stack if necessary. */
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if (!ctx->policies && !(ctx->policies = sk_ASN1_OBJECT_new_null()))
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goto err;
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if (!(copy = OBJ_dup(policy))) goto err;
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if (!sk_ASN1_OBJECT_push(ctx->policies, copy)) goto err;
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return 1;
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err:
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TSerr(TS_F_TS_RESP_CTX_ADD_POLICY, ERR_R_MALLOC_FAILURE);
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ASN1_OBJECT_free(copy);
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return 0;
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}
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int TS_RESP_CTX_add_md(TS_RESP_CTX *ctx, const EVP_MD *md)
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{
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/* Create new md stack if necessary. */
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if (!ctx->mds && !(ctx->mds = sk_EVP_MD_new_null()))
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goto err;
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/* Add the shared md, no copy needed. */
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if (!sk_EVP_MD_push(ctx->mds, (EVP_MD *)md)) goto err;
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return 1;
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err:
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TSerr(TS_F_TS_RESP_CTX_ADD_MD, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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#define TS_RESP_CTX_accuracy_free(ctx) \
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ASN1_INTEGER_free(ctx->seconds); \
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ctx->seconds = NULL; \
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ASN1_INTEGER_free(ctx->millis); \
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ctx->millis = NULL; \
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ASN1_INTEGER_free(ctx->micros); \
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ctx->micros = NULL;
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int TS_RESP_CTX_set_accuracy(TS_RESP_CTX *ctx,
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int secs, int millis, int micros)
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{
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TS_RESP_CTX_accuracy_free(ctx);
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if (secs && (!(ctx->seconds = ASN1_INTEGER_new())
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|| !ASN1_INTEGER_set(ctx->seconds, secs)))
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goto err;
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if (millis && (!(ctx->millis = ASN1_INTEGER_new())
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|| !ASN1_INTEGER_set(ctx->millis, millis)))
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goto err;
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if (micros && (!(ctx->micros = ASN1_INTEGER_new())
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|| !ASN1_INTEGER_set(ctx->micros, micros)))
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goto err;
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return 1;
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err:
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TS_RESP_CTX_accuracy_free(ctx);
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TSerr(TS_F_TS_RESP_CTX_SET_ACCURACY, ERR_R_MALLOC_FAILURE);
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return 0;
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}
|
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void TS_RESP_CTX_add_flags(TS_RESP_CTX *ctx, int flags)
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{
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ctx->flags |= flags;
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}
|
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|
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void TS_RESP_CTX_set_serial_cb(TS_RESP_CTX *ctx, TS_serial_cb cb, void *data)
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{
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ctx->serial_cb = cb;
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ctx->serial_cb_data = data;
|
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}
|
|
|
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void TS_RESP_CTX_set_time_cb(TS_RESP_CTX *ctx, TS_time_cb cb, void *data)
|
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{
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ctx->time_cb = cb;
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ctx->time_cb_data = data;
|
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}
|
|
|
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void TS_RESP_CTX_set_extension_cb(TS_RESP_CTX *ctx,
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TS_extension_cb cb, void *data)
|
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{
|
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ctx->extension_cb = cb;
|
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ctx->extension_cb_data = data;
|
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}
|
|
|
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int TS_RESP_CTX_set_status_info(TS_RESP_CTX *ctx,
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int status, const char *text)
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{
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TS_STATUS_INFO *si = NULL;
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ASN1_UTF8STRING *utf8_text = NULL;
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int ret = 0;
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|
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if (!(si = TS_STATUS_INFO_new())) goto err;
|
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if (!ASN1_INTEGER_set(si->status, status)) goto err;
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if (text)
|
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{
|
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if (!(utf8_text = ASN1_UTF8STRING_new())
|
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|| !ASN1_STRING_set(utf8_text, text, strlen(text)))
|
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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;
|
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utf8_text = NULL; /* Ownership is lost. */
|
|
}
|
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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;
|
|
}
|
|
|