diff options
Diffstat (limited to 'crypto/ts/ts_rsp_verify.c')
| -rw-r--r-- | crypto/ts/ts_rsp_verify.c | 1171 |
1 files changed, 589 insertions, 582 deletions
diff --git a/crypto/ts/ts_rsp_verify.c b/crypto/ts/ts_rsp_verify.c index b7d170afac0a..32b4d9923f46 100644 --- a/crypto/ts/ts_rsp_verify.c +++ b/crypto/ts/ts_rsp_verify.c @@ -1,6 +1,7 @@ /* crypto/ts/ts_resp_verify.c */ -/* Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL - * project 2002. +/* + * Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL project + * 2002. */ /* ==================================================================== * Copyright (c) 2006 The OpenSSL Project. All rights reserved. @@ -10,7 +11,7 @@ * are met: * * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. + * 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 @@ -65,665 +66,671 @@ /* 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); + 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 int TS_issuer_serial_cmp(ESS_ISSUER_SERIAL *is, X509_CINF *cinfo); -static int int_TS_RESP_verify_token(TS_VERIFY_CTX *ctx, - PKCS7 *token, TS_TST_INFO *tst_info); +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); + 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); +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 + * 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" }; +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)) +#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)) +#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. + * - 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) - { - TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE, TS_R_INVALID_NULL_POINTER); - goto err; - } - - /* Check for the correct content type */ - if(!PKCS7_type_is_signed(token)) - { - TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE, 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) - { - TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE, - 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)) - { - TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE, 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) - { - TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE, 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; + 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) { + TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE, TS_R_INVALID_NULL_POINTER); + goto err; + } + + /* Check for the correct content type */ + if (!PKCS7_type_is_signed(token)) { + TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE, 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) { + TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE, 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)) { + TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE, 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) { + TSerr(TS_F_TS_RESP_VERIFY_SIGNATURE, 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); + BIO_free_all(p7bio); + sk_X509_pop_free(chain, X509_free); + sk_X509_free(signers); - return ret; - } + return ret; +} /* * 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 = 1; - - /* chain is an out argument. */ - *chain = NULL; - X509_STORE_CTX_init(&cert_ctx, store, signer, untrusted); - X509_STORE_CTX_set_purpose(&cert_ctx, X509_PURPOSE_TIMESTAMP_SIGN); - i = X509_verify_cert(&cert_ctx); - if (i <= 0) - { - int j = X509_STORE_CTX_get_error(&cert_ctx); - TSerr(TS_F_TS_VERIFY_CERT, TS_R_CERTIFICATE_VERIFY_ERROR); - ERR_add_error_data(2, "Verify error:", - X509_verify_cert_error_string(j)); - ret = 0; - } - else - { - /* Get a copy of the certificate chain. */ - *chain = X509_STORE_CTX_get1_chain(&cert_ctx); - } - - 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 = ESS_get_signing_cert(si); - STACK_OF(ESS_CERT_ID) *cert_ids = NULL; - X509 *cert; - int i = 0; - int ret = 0; - - if (!ss) goto err; - 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; - } - } - ret = 1; + X509 *signer, STACK_OF(X509) **chain) +{ + X509_STORE_CTX cert_ctx; + int i; + int ret = 1; + + /* chain is an out argument. */ + *chain = NULL; + X509_STORE_CTX_init(&cert_ctx, store, signer, untrusted); + X509_STORE_CTX_set_purpose(&cert_ctx, X509_PURPOSE_TIMESTAMP_SIGN); + i = X509_verify_cert(&cert_ctx); + if (i <= 0) { + int j = X509_STORE_CTX_get_error(&cert_ctx); + TSerr(TS_F_TS_VERIFY_CERT, TS_R_CERTIFICATE_VERIFY_ERROR); + ERR_add_error_data(2, "Verify error:", + X509_verify_cert_error_string(j)); + ret = 0; + } else { + /* Get a copy of the certificate chain. */ + *chain = X509_STORE_CTX_get1_chain(&cert_ctx); + } + + 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 = ESS_get_signing_cert(si); + STACK_OF(ESS_CERT_ID) *cert_ids = NULL; + X509 *cert; + int i = 0; + int ret = 0; + + if (!ss) + goto err; + 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; + } + } + ret = 1; err: - if (!ret) - TSerr(TS_F_TS_CHECK_SIGNING_CERTS, - TS_R_ESS_SIGNING_CERTIFICATE_ERROR); - ESS_SIGNING_CERT_free(ss); - return ret; - } + if (!ret) + TSerr(TS_F_TS_CHECK_SIGNING_CERTS, + TS_R_ESS_SIGNING_CERTIFICATE_ERROR); + ESS_SIGNING_CERT_free(ss); + 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; - p = attr->value.sequence->data; - return d2i_ESS_SIGNING_CERT(NULL, &p, attr->value.sequence->length); - } +{ + ASN1_TYPE *attr; + const unsigned char *p; + attr = PKCS7_get_signed_attribute(si, NID_id_smime_aa_signingCertificate); + if (!attr) + return NULL; + p = attr->value.sequence->data; + return d2i_ESS_SIGNING_CERT(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; - - if (!cert_ids || !cert) return -1; - - /* Recompute SHA1 hash of certificate if necessary (side effect). */ - X509_check_purpose(cert, -1, 0); - - /* 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 == sizeof(cert->sha1_hash) - && !memcmp(cid->hash->data, cert->sha1_hash, - sizeof(cert->sha1_hash))) - { - /* Check the issuer/serial as well if specified. */ - ESS_ISSUER_SERIAL *is = cid->issuer_serial; - if (!is || !TS_issuer_serial_cmp(is, cert->cert_info)) - return i; - } - } - - return -1; - } +{ + int i; + + if (!cert_ids || !cert) + return -1; + + /* Recompute SHA1 hash of certificate if necessary (side effect). */ + X509_check_purpose(cert, -1, 0); + + /* 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 == sizeof(cert->sha1_hash) + && !memcmp(cid->hash->data, cert->sha1_hash, + sizeof(cert->sha1_hash))) { + /* Check the issuer/serial as well if specified. */ + ESS_ISSUER_SERIAL *is = cid->issuer_serial; + if (!is || !TS_issuer_serial_cmp(is, cert->cert_info)) + return i; + } + } + + return -1; +} static int TS_issuer_serial_cmp(ESS_ISSUER_SERIAL *is, X509_CINF *cinfo) - { - GENERAL_NAME *issuer; +{ + GENERAL_NAME *issuer; - if (!is || !cinfo || sk_GENERAL_NAME_num(is->issuer) != 1) return -1; + if (!is || !cinfo || 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, cinfo->issuer)) - 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, cinfo->issuer)) + return -1; - /* Check the serial number, too. */ - if (ASN1_INTEGER_cmp(is->serial, cinfo->serialNumber)) - return -1; + /* Check the serial number, too. */ + if (ASN1_INTEGER_cmp(is->serial, cinfo->serialNumber)) + return -1; - return 0; - } + return 0; +} -/* - * Verifies whether 'response' contains a valid response with regards +/*- + * 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. + * - 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; +{ + 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 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; + /* Check the contents of the time stamp token. */ + if (!int_TS_RESP_verify_token(ctx, token, tst_info)) + goto err; - ret = 1; + ret = 1; err: - return ret; - } + return ret; +} /* * 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; - } - -/* - * Verifies whether the 'token' contains a valid time stamp 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; +} + +/*- + * 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. + * - 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) - { - TSerr(TS_F_INT_TS_RESP_VERIFY_TOKEN, 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)) - { - TSerr(TS_F_INT_TS_RESP_VERIFY_TOKEN, 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)) - { - TSerr(TS_F_INT_TS_RESP_VERIFY_TOKEN, TS_R_TSA_UNTRUSTED); - goto err; - } - - ret = 1; +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) { + TSerr(TS_F_INT_TS_RESP_VERIFY_TOKEN, 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)) { + TSerr(TS_F_INT_TS_RESP_VERIFY_TOKEN, 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)) { + TSerr(TS_F_INT_TS_RESP_VERIFY_TOKEN, TS_R_TSA_UNTRUSTED); + goto err; + } + + ret = 1; err: - X509_free(signer); - X509_ALGOR_free(md_alg); - OPENSSL_free(imprint); - return ret; - } + X509_free(signer); + X509_ALGOR_free(md_alg); + OPENSSL_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) - strcpy(failure_text, ","); - else - first = 0; - strcat(failure_text, TS_failure_info[i].text); - } - } - } - if (failure_text[0] == '\0') - strcpy(failure_text, "unspecified"); - - /* Making up the error string. */ - TSerr(TS_F_TS_CHECK_STATUS_INFO, TS_R_NO_TIME_STAMP_TOKEN); - ERR_add_error_data(6, - "status code: ", status_text, - ", status text: ", embedded_status_text ? - embedded_status_text : "unspecified", - ", failure codes: ", failure_text); - OPENSSL_free(embedded_status_text); - - return 0; - } +{ + 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) + strcpy(failure_text, ","); + else + first = 0; + strcat(failure_text, TS_failure_info[i].text); + } + } + } + if (failure_text[0] == '\0') + strcpy(failure_text, "unspecified"); + + /* Making up the error string. */ + TSerr(TS_F_TS_CHECK_STATUS_INFO, TS_R_NO_TIME_STAMP_TOKEN); + ERR_add_error_data(6, + "status code: ", status_text, + ", status text: ", embedded_status_text ? + embedded_status_text : "unspecified", + ", failure codes: ", failure_text); + OPENSSL_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; - char *p; - - /* 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 = OPENSSL_malloc(length))) - { - TSerr(TS_F_TS_GET_STATUS_TEXT, ERR_R_MALLOC_FAILURE); - return NULL; - } - /* Concatenate the descriptions. */ - for (i = 0, p = result; i < sk_ASN1_UTF8STRING_num(text); ++i) - { - ASN1_UTF8STRING *current = sk_ASN1_UTF8STRING_value(text, i); - length = ASN1_STRING_length(current); - if (i > 0) *p++ = '/'; - strncpy(p, (const char *)ASN1_STRING_data(current), length); - p += length; - } - /* We do have space for this, too. */ - *p = '\0'; - - return result; - } +{ + int i; + unsigned int length = 0; + char *result = NULL; + char *p; + + /* 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 = OPENSSL_malloc(length))) { + TSerr(TS_F_TS_GET_STATUS_TEXT, ERR_R_MALLOC_FAILURE); + return NULL; + } + /* Concatenate the descriptions. */ + for (i = 0, p = result; i < sk_ASN1_UTF8STRING_num(text); ++i) { + ASN1_UTF8STRING *current = sk_ASN1_UTF8STRING_value(text, i); + length = ASN1_STRING_length(current); + if (i > 0) + *p++ = '/'; + strncpy(p, (const char *)ASN1_STRING_data(current), length); + p += length; + } + /* We do have space for this, too. */ + *p = '\0'; + + 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); +{ + ASN1_OBJECT *resp_oid = TS_TST_INFO_get_policy_id(tst_info); - if (OBJ_cmp(req_oid, resp_oid) != 0) - { - TSerr(TS_F_TS_CHECK_POLICY, TS_R_POLICY_MISMATCH); - return 0; - } + if (OBJ_cmp(req_oid, resp_oid) != 0) { + TSerr(TS_F_TS_CHECK_POLICY, TS_R_POLICY_MISMATCH); + return 0; + } - return 1; - } + return 1; +} static int TS_compute_imprint(BIO *data, TS_TST_INFO *tst_info, - X509_ALGOR **md_alg, - unsigned char **imprint, unsigned *imprint_len) - { - TS_MSG_IMPRINT *msg_imprint = TS_TST_INFO_get_msg_imprint(tst_info); - X509_ALGOR *md_alg_resp = TS_MSG_IMPRINT_get_algo(msg_imprint); - const EVP_MD *md; - EVP_MD_CTX md_ctx; - unsigned char buffer[4096]; - int length; - - *md_alg = NULL; - *imprint = NULL; - - /* Return the MD algorithm of the response. */ - if (!(*md_alg = X509_ALGOR_dup(md_alg_resp))) goto err; - - /* Getting the MD object. */ - if (!(md = EVP_get_digestbyobj((*md_alg)->algorithm))) - { - TSerr(TS_F_TS_COMPUTE_IMPRINT, TS_R_UNSUPPORTED_MD_ALGORITHM); - goto err; - } - - /* Compute message digest. */ - length = EVP_MD_size(md); - if (length < 0) - goto err; - *imprint_len = length; - if (!(*imprint = OPENSSL_malloc(*imprint_len))) - { - TSerr(TS_F_TS_COMPUTE_IMPRINT, 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; - - return 1; + X509_ALGOR **md_alg, + unsigned char **imprint, unsigned *imprint_len) +{ + TS_MSG_IMPRINT *msg_imprint = TS_TST_INFO_get_msg_imprint(tst_info); + X509_ALGOR *md_alg_resp = TS_MSG_IMPRINT_get_algo(msg_imprint); + const EVP_MD *md; + EVP_MD_CTX md_ctx; + unsigned char buffer[4096]; + int length; + + *md_alg = NULL; + *imprint = NULL; + + /* Return the MD algorithm of the response. */ + if (!(*md_alg = X509_ALGOR_dup(md_alg_resp))) + goto err; + + /* Getting the MD object. */ + if (!(md = EVP_get_digestbyobj((*md_alg)->algorithm))) { + TSerr(TS_F_TS_COMPUTE_IMPRINT, TS_R_UNSUPPORTED_MD_ALGORITHM); + goto err; + } + + /* Compute message digest. */ + length = EVP_MD_size(md); + if (length < 0) + goto err; + *imprint_len = length; + if (!(*imprint = OPENSSL_malloc(*imprint_len))) { + TSerr(TS_F_TS_COMPUTE_IMPRINT, 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; + + return 1; err: - X509_ALGOR_free(*md_alg); - OPENSSL_free(*imprint); - *imprint_len = 0; - *imprint = NULL; - 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; + X509_ALGOR_free(*md_alg); + OPENSSL_free(*imprint); + *imprint_len = 0; + *imprint = NULL; + 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) - TSerr(TS_F_TS_CHECK_IMPRINTS, TS_R_MESSAGE_IMPRINT_MISMATCH); - return ret; - } + if (!ret) + TSerr(TS_F_TS_CHECK_IMPRINTS, 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) - { - TSerr(TS_F_TS_CHECK_NONCES, TS_R_NONCE_NOT_RETURNED); - return 0; - } - - /* No error if a nonce is returned without being requested. */ - if (ASN1_INTEGER_cmp(a, b) != 0) - { - TSerr(TS_F_TS_CHECK_NONCES, 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. */ +{ + const ASN1_INTEGER *b = TS_TST_INFO_get_nonce(tst_info); + + /* Error if nonce is missing. */ + if (!b) { + TSerr(TS_F_TS_CHECK_NONCES, TS_R_NONCE_NOT_RETURNED); + return 0; + } + + /* No error if a nonce is returned without being requested. */ + if (ASN1_INTEGER_cmp(a, b) != 0) { + TSerr(TS_F_TS_CHECK_NONCES, 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; - - /* Check the subject name first. */ - if (tsa_name->type == GEN_DIRNAME - && X509_name_cmp(tsa_name->d.dirn, signer->cert_info->subject) == 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; - } +{ + STACK_OF(GENERAL_NAME) *gen_names = NULL; + int idx = -1; + int found = 0; + + /* Check the subject name first. */ + if (tsa_name->type == GEN_DIRNAME + && X509_name_cmp(tsa_name->d.dirn, signer->cert_info->subject) == 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; - } +{ + 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; +} |