/*
- * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
#include <openssl/objects.h>
#include <openssl/ts.h>
#include <openssl/pkcs7.h>
-#include "ts_lcl.h"
+#include "ts_local.h"
+#include "crypto/ess.h"
+
+DEFINE_STACK_OF(PKCS7_SIGNER_INFO)
+DEFINE_STACK_OF(ESS_CERT_ID)
+DEFINE_STACK_OF(ESS_CERT_ID_V2)
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 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_check_policy(const ASN1_OBJECT *req_oid,
+ const 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,
+ const 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_check_signing_certs(PKCS7_SIGNER_INFO *si,
STACK_OF(X509) *chain)
{
- ESS_SIGNING_CERT *ss = ess_get_signing_cert(si);
+ ESS_SIGNING_CERT *ss = ESS_SIGNING_CERT_get(si);
STACK_OF(ESS_CERT_ID) *cert_ids = NULL;
+ ESS_SIGNING_CERT_V2 *ssv2 = ESS_SIGNING_CERT_V2_get(si);
+ STACK_OF(ESS_CERT_ID_V2) *cert_ids_v2 = NULL;
X509 *cert;
int i = 0;
int ret = 0;
- if (!ss)
- goto err;
- cert_ids = ss->cert_ids;
- cert = sk_X509_value(chain, 0);
- if (ts_find_cert(cert_ids, cert) != 0)
- goto err;
+ if (ss != NULL) {
+ cert_ids = ss->cert_ids;
+ cert = sk_X509_value(chain, 0);
+ if (ess_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) {
- 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;
+ /*
+ * 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) {
+ for (i = 1; i < sk_X509_num(chain); ++i) {
+ cert = sk_X509_value(chain, i);
+ if (ess_find_cert(cert_ids, cert) < 0)
+ goto err;
+ }
+ }
+ } else if (ssv2 != NULL) {
+ cert_ids_v2 = ssv2->cert_ids;
+ cert = sk_X509_value(chain, 0);
+ if (ess_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.
+ */
+ if (sk_ESS_CERT_ID_V2_num(cert_ids_v2) > 1) {
+ for (i = 1; i < sk_X509_num(chain); ++i) {
+ cert = sk_X509_value(chain, i);
+ if (ess_find_cert_v2(cert_ids_v2, cert) < 0)
+ goto err;
+ }
}
+ } else {
+ 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);
+ 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;
- 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;
- unsigned char cert_sha1[SHA_DIGEST_LENGTH];
-
- if (!cert_ids || !cert)
- return -1;
-
- X509_digest(cert, EVP_sha1(), cert_sha1, NULL);
-
- /* 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);
-
- if (cid->hash->length == SHA_DIGEST_LENGTH
- && memcmp(cid->hash->data, cert_sha1, SHA_DIGEST_LENGTH) == 0) {
- ESS_ISSUER_SERIAL *is = cid->issuer_serial;
- if (!is || !ts_issuer_serial_cmp(is, cert))
- return i;
- }
- }
-
- return -1;
-}
-
-static int ts_issuer_serial_cmp(ESS_ISSUER_SERIAL *is, X509 *cert)
-{
- GENERAL_NAME *issuer;
-
- if (!is || !cert || sk_GENERAL_NAME_num(is->issuer) != 1)
- return -1;
-
- 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;
-
- 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:
unsigned char *imprint = NULL;
unsigned imprint_len = 0;
int ret = 0;
+ int flags = ctx->flags;
+
+ /* Some options require us to also check the signature */
+ if (((flags & TS_VFY_SIGNER) && tsa_name != NULL)
+ || (flags & TS_VFY_TSA_NAME)) {
+ flags |= TS_VFY_SIGNATURE;
+ }
- if ((ctx->flags & TS_VFY_SIGNATURE)
+ if ((flags & TS_VFY_SIGNATURE)
&& !TS_RESP_verify_signature(token, ctx->certs, ctx->store, &signer))
goto err;
- if ((ctx->flags & TS_VFY_VERSION)
+ if ((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;
}
- if ((ctx->flags & TS_VFY_POLICY)
+ if ((flags & TS_VFY_POLICY)
&& !ts_check_policy(ctx->policy, tst_info))
goto err;
- if ((ctx->flags & TS_VFY_IMPRINT)
+ if ((flags & TS_VFY_IMPRINT)
&& !ts_check_imprints(ctx->md_alg, ctx->imprint, ctx->imprint_len,
tst_info))
goto err;
- if ((ctx->flags & TS_VFY_DATA)
+ if ((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;
- if ((ctx->flags & TS_VFY_NONCE)
+ if ((flags & TS_VFY_NONCE)
&& !ts_check_nonces(ctx->nonce, tst_info))
goto err;
- if ((ctx->flags & TS_VFY_SIGNER)
+ if ((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;
}
- if ((ctx->flags & TS_VFY_TSA_NAME)
+ if ((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;
static char *ts_get_status_text(STACK_OF(ASN1_UTF8STRING) *text)
{
- int i;
- unsigned int length = 0;
- char *result = NULL;
- char *p;
-
- 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 */
- }
- if ((result = OPENSSL_malloc(length)) == NULL) {
- TSerr(TS_F_TS_GET_STATUS_TEXT, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
-
- 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;
- }
- *p = '\0';
-
- return result;
+ return sk_ASN1_UTF8STRING2text(text, "/", TS_MAX_STATUS_LENGTH);
}
-static int ts_check_policy(ASN1_OBJECT *req_oid, TS_TST_INFO *tst_info)
+static int ts_check_policy(const ASN1_OBJECT *req_oid,
+ const TS_TST_INFO *tst_info)
{
- ASN1_OBJECT *resp_oid = tst_info->policy_id;
+ const ASN1_OBJECT *resp_oid = tst_info->policy_id;
if (OBJ_cmp(req_oid, resp_oid) != 0) {
TSerr(TS_F_TS_CHECK_POLICY, TS_R_POLICY_MISMATCH);
}
static int ts_check_imprints(X509_ALGOR *algor_a,
- unsigned char *imprint_a, unsigned len_a,
+ const unsigned char *imprint_a, unsigned len_a,
TS_TST_INFO *tst_info)
{
TS_MSG_IMPRINT *b = tst_info->msg_imprint;
}
ret = len_a == (unsigned)ASN1_STRING_length(b->hashed_msg) &&
- memcmp(imprint_a, ASN1_STRING_data(b->hashed_msg), len_a) == 0;
+ memcmp(imprint_a, ASN1_STRING_get0_data(b->hashed_msg), len_a) == 0;
err:
if (!ret)
TSerr(TS_F_TS_CHECK_IMPRINTS, TS_R_MESSAGE_IMPRINT_MISMATCH);
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