This commit was manufactured by cvs2git to create tag 'tb_20250414'.tb_20250414

1 files changed, 0 insertions, 847 deletions

diff --git a/src/lib/libcrypto/ts/ts_rsp_verify.c b/src/lib/libcrypto/ts/ts_rsp_verify.c
deleted file mode 100644
index 69236f68ab..0000000000
--- a/src/lib/libcrypto/ts/ts_rsp_verify.c
+++ /dev/null
@@ -1,847 +0,0 @@
-/* $OpenBSD: ts_rsp_verify.c,v 1.30 2023/07/07 07:25:21 beck Exp $ */
-/* 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 <stdio.h>
-#include <string.h>
-
-#include <openssl/err.h>
-#include <openssl/objects.h>
-#include <openssl/pkcs7.h>
-#include <openssl/ts.h>
-
-#include "evp_local.h"
-#include "ts_local.h"
-#include "x509_local.h"
-
-/* Private function declarations. */
-
-static int TS_verify_cert(X509_STORE *store, STACK_OF(X509) *untrusted,
-    X509 *signer, STACK_OF(X509) **chain);
-static int TS_check_signing_certs(PKCS7_SIGNER_INFO *si, STACK_OF(X509) *chain);
-static ESS_SIGNING_CERT *ESS_get_signing_cert(PKCS7_SIGNER_INFO *si);
-static int TS_find_cert(STACK_OF(ESS_CERT_ID) *cert_ids, X509 *cert);
-static ESS_SIGNING_CERT_V2 *ESS_get_signing_cert_v2(PKCS7_SIGNER_INFO *si);
-static int TS_find_cert_v2(STACK_OF(ESS_CERT_ID_V2) *cert_ids, X509 *cert);
-static int TS_issuer_serial_cmp(ESS_ISSUER_SERIAL *is, X509 *cert);
-static int int_TS_RESP_verify_token(TS_VERIFY_CTX *ctx,
-    PKCS7 *token, TS_TST_INFO *tst_info);
-static int TS_check_status_info(TS_RESP *response);
-static char *TS_get_status_text(STACK_OF(ASN1_UTF8STRING) *text);
-static int TS_check_policy(ASN1_OBJECT *req_oid, TS_TST_INFO *tst_info);
-static int TS_compute_imprint(BIO *data, TS_TST_INFO *tst_info,
-    X509_ALGOR **md_alg,
-    unsigned char **imprint, unsigned *imprint_len);
-static int TS_check_imprints(X509_ALGOR *algor_a,
-    unsigned char *imprint_a, unsigned len_a,
-    TS_TST_INFO *tst_info);
-static int TS_check_nonces(const ASN1_INTEGER *a, TS_TST_INFO *tst_info);
-static int TS_check_signer_name(GENERAL_NAME *tsa_name, X509 *signer);
-static int TS_find_name(STACK_OF(GENERAL_NAME) *gen_names, GENERAL_NAME *name);
-
-/*
- * Local mapping between response codes and descriptions.
- * Don't forget to change TS_STATUS_BUF_SIZE when modifying
- * the elements of this array.
- */
-static const char *TS_status_text[] = {
-        "granted",
-        "grantedWithMods",
-        "rejection",
-        "waiting",
-        "revocationWarning",
-        "revocationNotification"
-};
-
-#define TS_STATUS_TEXT_SIZE     (sizeof(TS_status_text)/sizeof(*TS_status_text))
-
-/*
- * This must be greater or equal to the sum of the strings in TS_status_text
- * plus the number of its elements.
- */
-#define TS_STATUS_BUF_SIZE      256
-
-static struct {
-        int code;
-        const char *text;
-} TS_failure_info[] = {
-        { TS_INFO_BAD_ALG, "badAlg" },
-        { TS_INFO_BAD_REQUEST, "badRequest" },
-        { TS_INFO_BAD_DATA_FORMAT, "badDataFormat" },
-        { TS_INFO_TIME_NOT_AVAILABLE, "timeNotAvailable" },
-        { TS_INFO_UNACCEPTED_POLICY, "unacceptedPolicy" },
-        { TS_INFO_UNACCEPTED_EXTENSION, "unacceptedExtension" },
-        { TS_INFO_ADD_INFO_NOT_AVAILABLE, "addInfoNotAvailable" },
-        { TS_INFO_SYSTEM_FAILURE, "systemFailure" }
-};
-
-#define TS_FAILURE_INFO_SIZE    (sizeof(TS_failure_info) / \
-                                sizeof(*TS_failure_info))
-
-/* Functions for verifying a signed TS_TST_INFO structure. */
-
-/*
- * This function carries out the following tasks:
- *      - Checks if there is one and only one signer.
- *      - Search for the signing certificate in 'certs' and in the response.
- *      - Check the extended key usage and key usage fields of the signer
- *      certificate (done by the path validation).
- *      - Build and validate the certificate path.
- *      - Check if the certificate path meets the requirements of the
- *      SigningCertificate ESS signed attribute.
- *      - Verify the signature value.
- *      - Returns the signer certificate in 'signer', if 'signer' is not NULL.
- */
-int
-TS_RESP_verify_signature(PKCS7 *token, STACK_OF(X509) *certs,
-    X509_STORE *store, X509 **signer_out)
-{
-        STACK_OF(PKCS7_SIGNER_INFO) *sinfos = NULL;
-        PKCS7_SIGNER_INFO *si;
-        STACK_OF(X509) *signers = NULL;
-        X509    *signer;
-        STACK_OF(X509) *chain = NULL;
-        char    buf[4096];
-        int     i, j = 0, ret = 0;
-        BIO     *p7bio = NULL;
-
-        /* Some sanity checks first. */
-        if (!token) {
-                TSerror(TS_R_INVALID_NULL_POINTER);
-                goto err;
-        }
-
-        /* Check for the correct content type */
-        if (!PKCS7_type_is_signed(token)) {
-                TSerror(TS_R_WRONG_CONTENT_TYPE);
-                goto err;
-        }
-
-        /* Check if there is one and only one signer. */
-        sinfos = PKCS7_get_signer_info(token);
-        if (!sinfos || sk_PKCS7_SIGNER_INFO_num(sinfos) != 1) {
-                TSerror(TS_R_THERE_MUST_BE_ONE_SIGNER);
-                goto err;
-        }
-        si = sk_PKCS7_SIGNER_INFO_value(sinfos, 0);
-
-        /* Check for no content: no data to verify signature. */
-        if (PKCS7_get_detached(token)) {
-                TSerror(TS_R_NO_CONTENT);
-                goto err;
-        }
-
-        /* Get hold of the signer certificate, search only internal
-           certificates if it was requested. */
-        signers = PKCS7_get0_signers(token, certs, 0);
-        if (!signers || sk_X509_num(signers) != 1)
-                goto err;
-        signer = sk_X509_value(signers, 0);
-
-        /* Now verify the certificate. */
-        if (!TS_verify_cert(store, certs, signer, &chain))
-                goto err;
-
-        /* Check if the signer certificate is consistent with the
-           ESS extension. */
-        if (!TS_check_signing_certs(si, chain))
-                goto err;
-
-        /* Creating the message digest. */
-        p7bio = PKCS7_dataInit(token, NULL);
-
-        /* We now have to 'read' from p7bio to calculate digests etc. */
-        while ((i = BIO_read(p7bio, buf, sizeof(buf))) > 0)
-                ;
-
-        /* Verifying the signature. */
-        j = PKCS7_signatureVerify(p7bio, token, si, signer);
-        if (j <= 0) {
-                TSerror(TS_R_SIGNATURE_FAILURE);
-                goto err;
-        }
-
-        /* Return the signer certificate if needed. */
-        if (signer_out) {
-                *signer_out = signer;
-                CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
-        }
-
-        ret = 1;
-
-err:
-        BIO_free_all(p7bio);
-        sk_X509_pop_free(chain, X509_free);
-        sk_X509_free(signers);
-
-        return ret;
-}
-LCRYPTO_ALIAS(TS_RESP_verify_signature);
-
-/*
- * The certificate chain is returned in chain. Caller is responsible for
- * freeing the vector.
- */
-static int
-TS_verify_cert(X509_STORE *store, STACK_OF(X509) *untrusted, X509 *signer,
-    STACK_OF(X509) **chain)
-{
-        X509_STORE_CTX cert_ctx;
-        int i;
-        int ret = 0;
-
-        /* chain is an out argument. */
-        *chain = NULL;
-        if (X509_STORE_CTX_init(&cert_ctx, store, signer, untrusted) == 0) {
-                TSerror(ERR_R_X509_LIB);
-                goto err;
-        }
-        if (X509_STORE_CTX_set_purpose(&cert_ctx,
-            X509_PURPOSE_TIMESTAMP_SIGN) == 0)
-                goto err;
-        i = X509_verify_cert(&cert_ctx);
-        if (i <= 0) {
-                int j = X509_STORE_CTX_get_error(&cert_ctx);
-
-                TSerror(TS_R_CERTIFICATE_VERIFY_ERROR);
-                ERR_asprintf_error_data("Verify error:%s",
-                    X509_verify_cert_error_string(j));
-                goto err;
-        } else {
-                /* Get a copy of the certificate chain. */
-                *chain = X509_STORE_CTX_get1_chain(&cert_ctx);
-                ret = 1;
-        }
-
-err:
-        X509_STORE_CTX_cleanup(&cert_ctx);
-
-        return ret;
-}
-
-static int
-TS_check_signing_certs(PKCS7_SIGNER_INFO *si, STACK_OF(X509) *chain)
-{
-        ESS_SIGNING_CERT *ss = NULL;
-        STACK_OF(ESS_CERT_ID) *cert_ids;
-        ESS_SIGNING_CERT_V2 *ssv2 = NULL;
-        STACK_OF(ESS_CERT_ID_V2) *cert_ids_v2;
-        X509 *cert;
-        int i = 0;
-        int ret = 0;
-
-        if ((ss = ESS_get_signing_cert(si)) != NULL) {
-                cert_ids = ss->cert_ids;
-                /* The signer certificate must be the first in cert_ids. */
-                cert = sk_X509_value(chain, 0);
-
-                if (TS_find_cert(cert_ids, cert) != 0)
-                        goto err;
-
-                /*
-                 * Check the other certificates of the chain if there are more
-                 * than one certificate ids in cert_ids.
-                 */
-                if (sk_ESS_CERT_ID_num(cert_ids) > 1) {
-                        /* All the certificates of the chain must be in cert_ids. */
-                        for (i = 1; i < sk_X509_num(chain); i++) {
-                                cert = sk_X509_value(chain, i);
-
-                                if (TS_find_cert(cert_ids, cert) < 0)
-                                        goto err;
-                        }
-                }
-        }
-
-        if ((ssv2 = ESS_get_signing_cert_v2(si)) != NULL) {
-                cert_ids_v2 = ssv2->cert_ids;
-                /* The signer certificate must be the first in cert_ids_v2. */
-                cert = sk_X509_value(chain, 0);
-
-                if (TS_find_cert_v2(cert_ids_v2, cert) != 0)
-                        goto err;
-
-                /*
-                 * Check the other certificates of the chain if there are more
-                 * than one certificate ids in cert_ids_v2.
-                 */
-                if (sk_ESS_CERT_ID_V2_num(cert_ids_v2) > 1) {
-                        /* All the certificates of the chain must be in cert_ids_v2. */
-                        for (i = 1; i < sk_X509_num(chain); i++) {
-                                cert = sk_X509_value(chain, i);
-
-                                if (TS_find_cert_v2(cert_ids_v2, cert) < 0)
-                                        goto err;
-                        }
-                }
-        }
-
-        ret = 1;
-
-err:
-        if (!ret)
-                TSerror(TS_R_ESS_SIGNING_CERTIFICATE_ERROR);
-        ESS_SIGNING_CERT_free(ss);
-        ESS_SIGNING_CERT_V2_free(ssv2);
-        return ret;
-}
-
-static ESS_SIGNING_CERT *
-ESS_get_signing_cert(PKCS7_SIGNER_INFO *si)
-{
-        ASN1_TYPE *attr;
-        const unsigned char *p;
-
-        attr = PKCS7_get_signed_attribute(si,
-            NID_id_smime_aa_signingCertificate);
-        if (!attr)
-                return NULL;
-        if (attr->type != V_ASN1_SEQUENCE)
-                return NULL;
-        p = attr->value.sequence->data;
-        return d2i_ESS_SIGNING_CERT(NULL, &p, attr->value.sequence->length);
-}
-
-static ESS_SIGNING_CERT_V2 *
-ESS_get_signing_cert_v2(PKCS7_SIGNER_INFO *si)
-{
-        ASN1_TYPE *attr;
-        const unsigned char *p;
-
-        attr = PKCS7_get_signed_attribute(si, NID_id_smime_aa_signingCertificateV2);
-        if (attr == NULL)
-                return NULL;
-        p = attr->value.sequence->data;
-        return d2i_ESS_SIGNING_CERT_V2(NULL, &p, attr->value.sequence->length);
-}
-
-/* Returns < 0 if certificate is not found, certificate index otherwise. */
-static int
-TS_find_cert(STACK_OF(ESS_CERT_ID) *cert_ids, X509 *cert)
-{
-        int i;
-        unsigned char cert_hash[TS_HASH_LEN];
-
-        if (!cert_ids || !cert)
-                return -1;
-
-        if (!X509_digest(cert, TS_HASH_EVP, cert_hash, NULL))
-                return -1;
-
-        /* Recompute SHA1 hash of certificate if necessary (side effect). */
-        if (X509_check_purpose(cert, -1, 0) == -1)
-                return -1;
-
-        /* Look for cert in the cert_ids vector. */
-        for (i = 0; i < sk_ESS_CERT_ID_num(cert_ids); ++i) {
-                ESS_CERT_ID *cid = sk_ESS_CERT_ID_value(cert_ids, i);
-
-                /* Check the SHA-1 hash first. */
-                if (cid->hash->length == TS_HASH_LEN && !memcmp(cid->hash->data,
-                    cert_hash, TS_HASH_LEN)) {
-                        /* Check the issuer/serial as well if specified. */
-                        ESS_ISSUER_SERIAL *is = cid->issuer_serial;
-
-                        if (is == NULL || TS_issuer_serial_cmp(is, cert) == 0)
-                                return i;
-                }
-        }
-
-        return -1;
-}
-
-/* Returns < 0 if certificate is not found, certificate index otherwise. */
-static int
-TS_find_cert_v2(STACK_OF(ESS_CERT_ID_V2) *cert_ids, X509 *cert)
-{
-        int i;
-        unsigned char cert_digest[EVP_MAX_MD_SIZE];
-        unsigned int len;
-
-        /* Look for cert in the cert_ids vector. */
-        for (i = 0; i < sk_ESS_CERT_ID_V2_num(cert_ids); ++i) {
-                ESS_CERT_ID_V2 *cid = sk_ESS_CERT_ID_V2_value(cert_ids, i);
-                const EVP_MD *md = EVP_sha256();
-
-                if (cid->hash_alg != NULL)
-                        md = EVP_get_digestbyobj(cid->hash_alg->algorithm);
-                if (md == NULL)
-                        return -1;
-
-                if (!X509_digest(cert, md, cert_digest, &len))
-                        return -1;
-
-                if ((unsigned int)cid->hash->length != len)
-                        return -1;
-
-                if (memcmp(cid->hash->data, cert_digest, cid->hash->length) == 0) {
-                        ESS_ISSUER_SERIAL *is = cid->issuer_serial;
-
-                        if (is == NULL || TS_issuer_serial_cmp(is, cert) == 0)
-                                return i;
-                }
-        }
-
-        return -1;
-}
-
-static int
-TS_issuer_serial_cmp(ESS_ISSUER_SERIAL *is, X509 *cert)
-{
-        GENERAL_NAME *issuer;
-
-        if (is == NULL || cert == NULL || sk_GENERAL_NAME_num(is->issuer) != 1)
-                return -1;
-
-        /* Check the issuer first. It must be a directory name. */
-        issuer = sk_GENERAL_NAME_value(is->issuer, 0);
-        if (issuer->type != GEN_DIRNAME ||
-            X509_NAME_cmp(issuer->d.dirn, X509_get_issuer_name(cert)))
-                return -1;
-
-        /* Check the serial number, too. */
-        if (ASN1_INTEGER_cmp(is->serial, X509_get_serialNumber(cert)))
-                return -1;
-
-        return 0;
-}
-
-/*
- * Verifies whether 'response' contains a valid response with regards
- * to the settings of the context:
- *      - Gives an error message if the TS_TST_INFO is not present.
- *      - Calls _TS_RESP_verify_token to verify the token content.
- */
-int
-TS_RESP_verify_response(TS_VERIFY_CTX *ctx, TS_RESP *response)
-{
-        PKCS7 *token = TS_RESP_get_token(response);
-        TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response);
-        int ret = 0;
-
-        /* Check if we have a successful TS_TST_INFO object in place. */
-        if (!TS_check_status_info(response))
-                goto err;
-
-        /* Check the contents of the time stamp token. */
-        if (!int_TS_RESP_verify_token(ctx, token, tst_info))
-                goto err;
-
-        ret = 1;
-
-err:
-        return ret;
-}
-LCRYPTO_ALIAS(TS_RESP_verify_response);
-
-/*
- * Tries to extract a TS_TST_INFO structure from the PKCS7 token and
- * calls the internal int_TS_RESP_verify_token function for verifying it.
- */
-int
-TS_RESP_verify_token(TS_VERIFY_CTX *ctx, PKCS7 *token)
-{
-        TS_TST_INFO *tst_info = PKCS7_to_TS_TST_INFO(token);
-        int ret = 0;
-
-        if (tst_info) {
-                ret = int_TS_RESP_verify_token(ctx, token, tst_info);
-                TS_TST_INFO_free(tst_info);
-        }
-        return ret;
-}
-LCRYPTO_ALIAS(TS_RESP_verify_token);
-
-/*
- * Verifies whether the 'token' contains a valid time stamp token
- * with regards to the settings of the context. Only those checks are
- * carried out that are specified in the context:
- *      - Verifies the signature of the TS_TST_INFO.
- *      - Checks the version number of the response.
- *      - Check if the requested and returned policies math.
- *      - Check if the message imprints are the same.
- *      - Check if the nonces are the same.
- *      - Check if the TSA name matches the signer.
- *      - Check if the TSA name is the expected TSA.
- */
-static int
-int_TS_RESP_verify_token(TS_VERIFY_CTX *ctx, PKCS7 *token,
-    TS_TST_INFO *tst_info)
-{
-        X509 *signer = NULL;
-        GENERAL_NAME *tsa_name = TS_TST_INFO_get_tsa(tst_info);
-        X509_ALGOR *md_alg = NULL;
-        unsigned char *imprint = NULL;
-        unsigned imprint_len = 0;
-        int ret = 0;
-
-        /* Verify the signature. */
-        if ((ctx->flags & TS_VFY_SIGNATURE) &&
-            !TS_RESP_verify_signature(token, ctx->certs, ctx->store, &signer))
-                goto err;
-
-        /* Check version number of response. */
-        if ((ctx->flags & TS_VFY_VERSION) &&
-            TS_TST_INFO_get_version(tst_info) != 1) {
-                TSerror(TS_R_UNSUPPORTED_VERSION);
-                goto err;
-        }
-
-        /* Check policies. */
-        if ((ctx->flags & TS_VFY_POLICY) &&
-            !TS_check_policy(ctx->policy, tst_info))
-                goto err;
-
-        /* Check message imprints. */
-        if ((ctx->flags & TS_VFY_IMPRINT) &&
-            !TS_check_imprints(ctx->md_alg, ctx->imprint, ctx->imprint_len,
-                tst_info))
-                goto err;
-
-        /* Compute and check message imprints. */
-        if ((ctx->flags & TS_VFY_DATA) &&
-            (!TS_compute_imprint(ctx->data, tst_info,
-            &md_alg, &imprint, &imprint_len) ||
-            !TS_check_imprints(md_alg, imprint, imprint_len, tst_info)))
-                goto err;
-
-        /* Check nonces. */
-        if ((ctx->flags & TS_VFY_NONCE) &&
-            !TS_check_nonces(ctx->nonce, tst_info))
-                goto err;
-
-        /* Check whether TSA name and signer certificate match. */
-        if ((ctx->flags & TS_VFY_SIGNER) &&
-            tsa_name && !TS_check_signer_name(tsa_name, signer)) {
-                TSerror(TS_R_TSA_NAME_MISMATCH);
-                goto err;
-        }
-
-        /* Check whether the TSA is the expected one. */
-        if ((ctx->flags & TS_VFY_TSA_NAME) &&
-            !TS_check_signer_name(ctx->tsa_name, signer)) {
-                TSerror(TS_R_TSA_UNTRUSTED);
-                goto err;
-        }
-
-        ret = 1;
-
-err:
-        X509_free(signer);
-        X509_ALGOR_free(md_alg);
-        free(imprint);
-        return ret;
-}
-
-static int
-TS_check_status_info(TS_RESP *response)
-{
-        TS_STATUS_INFO *info = TS_RESP_get_status_info(response);
-        long status = ASN1_INTEGER_get(info->status);
-        const char *status_text = NULL;
-        char *embedded_status_text = NULL;
-        char failure_text[TS_STATUS_BUF_SIZE] = "";
-
-        /* Check if everything went fine. */
-        if (status == 0 || status == 1)
-                return 1;
-
-        /* There was an error, get the description in status_text. */
-        if (0 <= status && status < (long)TS_STATUS_TEXT_SIZE)
-                status_text = TS_status_text[status];
-        else
-                status_text = "unknown code";
-
-        /* Set the embedded_status_text to the returned description. */
-        if (sk_ASN1_UTF8STRING_num(info->text) > 0 &&
-            !(embedded_status_text = TS_get_status_text(info->text)))
-                return 0;
-
-        /* Filling in failure_text with the failure information. */
-        if (info->failure_info) {
-                int i;
-                int first = 1;
-                for (i = 0; i < (int)TS_FAILURE_INFO_SIZE; ++i) {
-                        if (ASN1_BIT_STRING_get_bit(info->failure_info,
-                            TS_failure_info[i].code)) {
-                                if (!first)
-                                        strlcat(failure_text, ",",
-                                            TS_STATUS_BUF_SIZE);
-                                else
-                                        first = 0;
-                                strlcat(failure_text, TS_failure_info[i].text,
-                                    TS_STATUS_BUF_SIZE);
-                        }
-                }
-        }
-        if (failure_text[0] == '\0')
-                strlcpy(failure_text, "unspecified", TS_STATUS_BUF_SIZE);
-
-        /* Making up the error string. */
-        TSerror(TS_R_NO_TIME_STAMP_TOKEN);
-        ERR_asprintf_error_data
-            ("status code: %s, status text: %s, failure codes: %s",
-            status_text,
-            embedded_status_text ? embedded_status_text : "unspecified",
-            failure_text);
-        free(embedded_status_text);
-
-        return 0;
-}
-
-static char *
-TS_get_status_text(STACK_OF(ASN1_UTF8STRING) *text)
-{
-        int i;
-        unsigned int length = 0;
-        char *result = NULL;
-
-        /* Determine length first. */
-        for (i = 0; i < sk_ASN1_UTF8STRING_num(text); ++i) {
-                ASN1_UTF8STRING *current = sk_ASN1_UTF8STRING_value(text, i);
-                length += ASN1_STRING_length(current);
-                length += 1;    /* separator character */
-        }
-        /* Allocate memory (closing '\0' included). */
-        if (!(result = malloc(length))) {
-                TSerror(ERR_R_MALLOC_FAILURE);
-                return NULL;
-        }
-        /* Concatenate the descriptions. */
-        result[0] = '\0';
-        for (i = 0; i < sk_ASN1_UTF8STRING_num(text); ++i) {
-                ASN1_UTF8STRING *current = sk_ASN1_UTF8STRING_value(text, i);
-                if (i > 0)
-                        strlcat(result, "/", length);
-                strlcat(result, (const char *)ASN1_STRING_data(current), length);
-        }
-        return result;
-}
-
-static int
-TS_check_policy(ASN1_OBJECT *req_oid, TS_TST_INFO *tst_info)
-{
-        ASN1_OBJECT *resp_oid = TS_TST_INFO_get_policy_id(tst_info);
-
-        if (OBJ_cmp(req_oid, resp_oid) != 0) {
-                TSerror(TS_R_POLICY_MISMATCH);
-                return 0;
-        }
-
-        return 1;
-}
-
-static int
-TS_compute_imprint(BIO *data, TS_TST_INFO *tst_info, X509_ALGOR **out_md_alg,
-    unsigned char **out_imprint, unsigned int *out_imprint_len)
-{
-        TS_MSG_IMPRINT *msg_imprint;
-        X509_ALGOR *md_alg_resp;
-        X509_ALGOR *md_alg = NULL;
-        unsigned char *imprint = NULL;
-        unsigned int imprint_len = 0;
-        const EVP_MD *md;
-        EVP_MD_CTX md_ctx;
-        unsigned char buffer[4096];
-        int length;
-
-        *out_md_alg = NULL;
-        *out_imprint = NULL;
-        *out_imprint_len = 0;
-
-        /* Retrieve the MD algorithm of the response. */
-        msg_imprint = TS_TST_INFO_get_msg_imprint(tst_info);
-        md_alg_resp = TS_MSG_IMPRINT_get_algo(msg_imprint);
-        if ((md_alg = X509_ALGOR_dup(md_alg_resp)) == NULL)
-                goto err;
-
-        /* Getting the MD object. */
-        if ((md = EVP_get_digestbyobj((md_alg)->algorithm)) == NULL) {
-                TSerror(TS_R_UNSUPPORTED_MD_ALGORITHM);
-                goto err;
-        }
-
-        /* Compute message digest. */
-        if ((length = EVP_MD_size(md)) < 0)
-                goto err;
-        imprint_len = length;
-        if ((imprint = malloc(imprint_len)) == NULL) {
-                TSerror(ERR_R_MALLOC_FAILURE);
-                goto err;
-        }
-
-        if (!EVP_DigestInit(&md_ctx, md))
-                goto err;
-        while ((length = BIO_read(data, buffer, sizeof(buffer))) > 0) {
-                if (!EVP_DigestUpdate(&md_ctx, buffer, length))
-                        goto err;
-        }
-        if (!EVP_DigestFinal(&md_ctx, imprint, NULL))
-                goto err;
-
-        *out_md_alg = md_alg;
-        md_alg = NULL;
-        *out_imprint = imprint;
-        imprint = NULL;
-        *out_imprint_len = imprint_len;
-
-        return 1;
-
-err:
-        X509_ALGOR_free(md_alg);
-        free(imprint);
-        return 0;
-}
-
-static int
-TS_check_imprints(X509_ALGOR *algor_a, unsigned char *imprint_a, unsigned len_a,
-    TS_TST_INFO *tst_info)
-{
-        TS_MSG_IMPRINT *b = TS_TST_INFO_get_msg_imprint(tst_info);
-        X509_ALGOR *algor_b = TS_MSG_IMPRINT_get_algo(b);
-        int ret = 0;
-
-        /* algor_a is optional. */
-        if (algor_a) {
-                /* Compare algorithm OIDs. */
-                if (OBJ_cmp(algor_a->algorithm, algor_b->algorithm))
-                        goto err;
-
-                /* The parameter must be NULL in both. */
-                if ((algor_a->parameter &&
-                    ASN1_TYPE_get(algor_a->parameter) != V_ASN1_NULL) ||
-                    (algor_b->parameter &&
-                    ASN1_TYPE_get(algor_b->parameter) != V_ASN1_NULL))
-                        goto err;
-        }
-
-        /* Compare octet strings. */
-        ret = len_a == (unsigned) ASN1_STRING_length(b->hashed_msg) &&
-            memcmp(imprint_a, ASN1_STRING_data(b->hashed_msg), len_a) == 0;
-
-err:
-        if (!ret)
-                TSerror(TS_R_MESSAGE_IMPRINT_MISMATCH);
-        return ret;
-}
-
-static int
-TS_check_nonces(const ASN1_INTEGER *a, TS_TST_INFO *tst_info)
-{
-        const ASN1_INTEGER *b = TS_TST_INFO_get_nonce(tst_info);
-
-        /* Error if nonce is missing. */
-        if (!b) {
-                TSerror(TS_R_NONCE_NOT_RETURNED);
-                return 0;
-        }
-
-        /* No error if a nonce is returned without being requested. */
-        if (ASN1_INTEGER_cmp(a, b) != 0) {
-                TSerror(TS_R_NONCE_MISMATCH);
-                return 0;
-        }
-
-        return 1;
-}
-
-/* Check if the specified TSA name matches either the subject
-   or one of the subject alternative names of the TSA certificate. */
-static int
-TS_check_signer_name(GENERAL_NAME *tsa_name, X509 *signer)
-{
-        STACK_OF(GENERAL_NAME) *gen_names = NULL;
-        int idx = -1;
-        int found = 0;
-
-        if (signer == NULL)
-                return 0;
-
-        /* Check the subject name first. */
-        if (tsa_name->type == GEN_DIRNAME &&
-            X509_name_cmp(tsa_name->d.dirn, X509_get_subject_name(signer)) == 0)
-                return 1;
-
-        /* Check all the alternative names. */
-        gen_names = X509_get_ext_d2i(signer, NID_subject_alt_name,
-            NULL, &idx);
-        while (gen_names != NULL &&
-            !(found = (TS_find_name(gen_names, tsa_name) >= 0))) {
-                /* Get the next subject alternative name,
-                   although there should be no more than one. */
-                GENERAL_NAMES_free(gen_names);
-                gen_names = X509_get_ext_d2i(signer, NID_subject_alt_name,
-                    NULL, &idx);
-        }
-        if (gen_names)
-                GENERAL_NAMES_free(gen_names);
-
-        return found;
-}
-
-/* Returns 1 if name is in gen_names, 0 otherwise. */
-static int
-TS_find_name(STACK_OF(GENERAL_NAME) *gen_names, GENERAL_NAME *name)
-{
-        int i, found;
-        for (i = 0, found = 0; !found && i < sk_GENERAL_NAME_num(gen_names);
-            ++i) {
-                GENERAL_NAME *current = sk_GENERAL_NAME_value(gen_names, i);
-                found = GENERAL_NAME_cmp(current, name) == 0;
-        }
-        return found ? i - 1 : -1;
-}