--- /dev/null
+/* 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;
+ }
projects / cassiopeia.git / blobdiff