+PKCS7_SIGNER_INFO *PKCS7_sign_add_signer(PKCS7 *p7, X509 *signcert,
+ EVP_PKEY *pkey, const EVP_MD *md,
+ int flags)
+{
+ PKCS7_SIGNER_INFO *si = NULL;
+ STACK_OF(X509_ALGOR) *smcap = NULL;
+ if (!X509_check_private_key(signcert, pkey)) {
+ PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
+ PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
+ return NULL;
+ }
+
+ if ((si = PKCS7_add_signature(p7, signcert, pkey, md)) == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
+ PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
+ return NULL;
+ }
+
+ if (!(flags & PKCS7_NOCERTS)) {
+ if (!PKCS7_add_certificate(p7, signcert))
+ goto err;
+ }
+
+ if (!(flags & PKCS7_NOATTR)) {
+ if (!PKCS7_add_attrib_content_type(si, NULL))
+ goto err;
+ /* Add SMIMECapabilities */
+ if (!(flags & PKCS7_NOSMIMECAP)) {
+ if ((smcap = sk_X509_ALGOR_new_null()) == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ if (!add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
+ || !add_digest_smcap(smcap, NID_id_GostR3411_2012_256, -1)
+ || !add_digest_smcap(smcap, NID_id_GostR3411_2012_512, -1)
+ || !add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
+ || !add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
+ || !add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
+ || !add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
+ || !add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
+ || !add_cipher_smcap(smcap, NID_rc2_cbc, 128)
+ || !add_cipher_smcap(smcap, NID_rc2_cbc, 64)
+ || !add_cipher_smcap(smcap, NID_des_cbc, -1)
+ || !add_cipher_smcap(smcap, NID_rc2_cbc, 40)
+ || !PKCS7_add_attrib_smimecap(si, smcap))
+ goto err;
+ sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
+ smcap = NULL;
+ }
+ if (flags & PKCS7_REUSE_DIGEST) {
+ if (!pkcs7_copy_existing_digest(p7, si))
+ goto err;
+ if (!(flags & PKCS7_PARTIAL) && !PKCS7_SIGNER_INFO_sign(si))
+ goto err;
+ }
+ }
+ return si;
+ err:
+ sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
+ return NULL;
+}
+
+/*
+ * Search for a digest matching SignerInfo digest type and if found copy
+ * across.
+ */
+
+static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
+{
+ int i;
+ STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
+ PKCS7_SIGNER_INFO *sitmp;
+ ASN1_OCTET_STRING *osdig = NULL;
+ sinfos = PKCS7_get_signer_info(p7);
+ for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
+ sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
+ if (si == sitmp)
+ break;
+ if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0)
+ continue;
+ if (!OBJ_cmp(si->digest_alg->algorithm, sitmp->digest_alg->algorithm)) {
+ osdig = PKCS7_digest_from_attributes(sitmp->auth_attr);
+ break;
+ }
+
+ }
+
+ if (osdig)
+ return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length);
+
+ PKCS7err(PKCS7_F_PKCS7_COPY_EXISTING_DIGEST,
+ PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND);
+ return 0;
+}
+
+int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
+ BIO *indata, BIO *out, int flags)
+{
+ STACK_OF(X509) *signers;
+ X509 *signer;
+ STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
+ PKCS7_SIGNER_INFO *si;
+ X509_STORE_CTX cert_ctx;
+ char *buf = NULL;
+ int i, j = 0, k, ret = 0;
+ BIO *p7bio = NULL;
+ BIO *tmpin = NULL, *tmpout = NULL;
+
+ if (!p7) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_INVALID_NULL_POINTER);
+ return 0;
+ }
+
+ if (!PKCS7_type_is_signed(p7)) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_WRONG_CONTENT_TYPE);
+ return 0;
+ }
+
+ /* Check for no data and no content: no data to verify signature */
+ if (PKCS7_get_detached(p7) && !indata) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_CONTENT);
+ return 0;
+ }
+
+ /* Check for data and content: two sets of data */
+ if (!PKCS7_get_detached(p7) && indata) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_CONTENT_AND_DATA_PRESENT);
+ return 0;
+ }
+
+ sinfos = PKCS7_get_signer_info(p7);
+
+ if (!sinfos || !sk_PKCS7_SIGNER_INFO_num(sinfos)) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_SIGNATURES_ON_DATA);
+ return 0;
+ }
+
+ signers = PKCS7_get0_signers(p7, certs, flags);
+ if (!signers)
+ return 0;
+
+ /* Now verify the certificates */
+
+ if (!(flags & PKCS7_NOVERIFY))
+ for (k = 0; k < sk_X509_num(signers); k++) {
+ signer = sk_X509_value(signers, k);
+ if (!(flags & PKCS7_NOCHAIN)) {
+ if (!X509_STORE_CTX_init(&cert_ctx, store, signer,
+ p7->d.sign->cert)) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
+ goto err;
+ }
+ X509_STORE_CTX_set_default(&cert_ctx, "smime_sign");
+ } else if (!X509_STORE_CTX_init(&cert_ctx, store, signer, NULL)) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
+ goto err;
+ }
+ if (!(flags & PKCS7_NOCRL))
+ X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl);
+ i = X509_verify_cert(&cert_ctx);
+ if (i <= 0)
+ j = X509_STORE_CTX_get_error(&cert_ctx);
+ X509_STORE_CTX_cleanup(&cert_ctx);
+ if (i <= 0) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY,
+ PKCS7_R_CERTIFICATE_VERIFY_ERROR);
+ ERR_add_error_data(2, "Verify error:",
+ X509_verify_cert_error_string(j));
+ goto err;
+ }
+ /* Check for revocation status here */
+ }
+
+ /*
+ * Performance optimization: if the content is a memory BIO then store
+ * its contents in a temporary read only memory BIO. This avoids
+ * potentially large numbers of slow copies of data which will occur when
+ * reading from a read write memory BIO when signatures are calculated.
+ */
+
+ if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM)) {
+ char *ptr;
+ long len;
+ len = BIO_get_mem_data(indata, &ptr);
+ tmpin = BIO_new_mem_buf(ptr, len);
+ if (tmpin == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ } else
+ tmpin = indata;
+
+ if ((p7bio = PKCS7_dataInit(p7, tmpin)) == NULL)
+ goto err;
+
+ if (flags & PKCS7_TEXT) {
+ if ((tmpout = BIO_new(BIO_s_mem())) == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ BIO_set_mem_eof_return(tmpout, 0);
+ } else
+ tmpout = out;
+
+ /* We now have to 'read' from p7bio to calculate digests etc. */
+ if ((buf = OPENSSL_malloc(BUFFERSIZE)) == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ for (;;) {
+ i = BIO_read(p7bio, buf, BUFFERSIZE);
+ if (i <= 0)
+ break;
+ if (tmpout)
+ BIO_write(tmpout, buf, i);
+ }
+
+ if (flags & PKCS7_TEXT) {
+ if (!SMIME_text(tmpout, out)) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SMIME_TEXT_ERROR);
+ BIO_free(tmpout);
+ goto err;
+ }
+ BIO_free(tmpout);
+ }
+
+ /* Now Verify All Signatures */
+ if (!(flags & PKCS7_NOSIGS))
+ for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
+ si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
+ signer = sk_X509_value(signers, i);
+ j = PKCS7_signatureVerify(p7bio, p7, si, signer);
+ if (j <= 0) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SIGNATURE_FAILURE);
+ goto err;
+ }
+ }
+
+ ret = 1;
+
+ err:
+ OPENSSL_free(buf);
+ if (tmpin == indata) {
+ if (indata)
+ BIO_pop(p7bio);
+ }
+ BIO_free_all(p7bio);
+ sk_X509_free(signers);
+ return ret;
+}
+
+STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs,
+ int flags)
+{
+ STACK_OF(X509) *signers;
+ STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
+ PKCS7_SIGNER_INFO *si;
+ PKCS7_ISSUER_AND_SERIAL *ias;
+ X509 *signer;
+ int i;
+
+ if (!p7) {
+ PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_INVALID_NULL_POINTER);
+ return NULL;
+ }
+
+ if (!PKCS7_type_is_signed(p7)) {
+ PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_WRONG_CONTENT_TYPE);
+ return NULL;
+ }
+
+ /* Collect all the signers together */
+
+ sinfos = PKCS7_get_signer_info(p7);
+
+ if (sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) {
+ PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_NO_SIGNERS);
+ return 0;
+ }
+
+ if ((signers = sk_X509_new_null()) == NULL) {
+ PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
+ si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
+ ias = si->issuer_and_serial;
+ signer = NULL;
+ /* If any certificates passed they take priority */
+ if (certs)
+ signer = X509_find_by_issuer_and_serial(certs,
+ ias->issuer, ias->serial);
+ if (!signer && !(flags & PKCS7_NOINTERN)
+ && p7->d.sign->cert)
+ signer =
+ X509_find_by_issuer_and_serial(p7->d.sign->cert,
+ ias->issuer, ias->serial);
+ if (!signer) {
+ PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,
+ PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND);
+ sk_X509_free(signers);
+ return 0;
+ }
+
+ if (!sk_X509_push(signers, signer)) {
+ sk_X509_free(signers);
+ return NULL;
+ }
+ }
+ return signers;
+}