--- /dev/null
+/* Copyright (c) 2017, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#include <openssl/pkcs7.h>
+
+#include <assert.h>
+#include <limits.h>
+
+#include <openssl/bytestring.h>
+#include <openssl/err.h>
+#include <openssl/mem.h>
+#include <openssl/pem.h>
+#include <openssl/pool.h>
+#include <openssl/stack.h>
+#include <openssl/x509.h>
+
+#include "internal.h"
+
+
+int PKCS7_get_certificates(STACK_OF(X509) *out_certs, CBS *cbs) {
+ int ret = 0;
+ const size_t initial_certs_len = sk_X509_num(out_certs);
+ STACK_OF(CRYPTO_BUFFER) *raw = sk_CRYPTO_BUFFER_new_null();
+ if (raw == NULL ||
+ !PKCS7_get_raw_certificates(raw, cbs, NULL)) {
+ goto err;
+ }
+
+ for (size_t i = 0; i < sk_CRYPTO_BUFFER_num(raw); i++) {
+ CRYPTO_BUFFER *buf = sk_CRYPTO_BUFFER_value(raw, i);
+ X509 *x509 = X509_parse_from_buffer(buf);
+ if (x509 == NULL ||
+ !sk_X509_push(out_certs, x509)) {
+ X509_free(x509);
+ goto err;
+ }
+ }
+
+ ret = 1;
+
+err:
+ sk_CRYPTO_BUFFER_pop_free(raw, CRYPTO_BUFFER_free);
+ if (!ret) {
+ while (sk_X509_num(out_certs) != initial_certs_len) {
+ X509 *x509 = sk_X509_pop(out_certs);
+ X509_free(x509);
+ }
+ }
+
+ return ret;
+}
+
+int PKCS7_get_CRLs(STACK_OF(X509_CRL) *out_crls, CBS *cbs) {
+ CBS signed_data, crls;
+ uint8_t *der_bytes = NULL;
+ int ret = 0;
+ const size_t initial_crls_len = sk_X509_CRL_num(out_crls);
+
+ if (!pkcs7_parse_header(&der_bytes, &signed_data, cbs)) {
+ return 0;
+ }
+
+ // See https://tools.ietf.org/html/rfc2315#section-9.1
+
+ // Even if only CRLs are included, there may be an empty certificates block.
+ // OpenSSL does this, for example.
+ if (CBS_peek_asn1_tag(&signed_data,
+ CBS_ASN1_CONTEXT_SPECIFIC | CBS_ASN1_CONSTRUCTED | 0) &&
+ !CBS_get_asn1(&signed_data, NULL /* certificates */,
+ CBS_ASN1_CONTEXT_SPECIFIC | CBS_ASN1_CONSTRUCTED | 0)) {
+ goto err;
+ }
+
+ if (!CBS_get_asn1(&signed_data, &crls,
+ CBS_ASN1_CONTEXT_SPECIFIC | CBS_ASN1_CONSTRUCTED | 1)) {
+ OPENSSL_PUT_ERROR(PKCS7, PKCS7_R_NO_CRLS_INCLUDED);
+ goto err;
+ }
+
+ while (CBS_len(&crls) > 0) {
+ CBS crl_data;
+ X509_CRL *crl;
+ const uint8_t *inp;
+
+ if (!CBS_get_asn1_element(&crls, &crl_data, CBS_ASN1_SEQUENCE)) {
+ goto err;
+ }
+
+ if (CBS_len(&crl_data) > LONG_MAX) {
+ goto err;
+ }
+ inp = CBS_data(&crl_data);
+ crl = d2i_X509_CRL(NULL, &inp, (long)CBS_len(&crl_data));
+ if (!crl) {
+ goto err;
+ }
+
+ assert(inp == CBS_data(&crl_data) + CBS_len(&crl_data));
+
+ if (sk_X509_CRL_push(out_crls, crl) == 0) {
+ X509_CRL_free(crl);
+ goto err;
+ }
+ }
+
+ ret = 1;
+
+err:
+ OPENSSL_free(der_bytes);
+
+ if (!ret) {
+ while (sk_X509_CRL_num(out_crls) != initial_crls_len) {
+ X509_CRL_free(sk_X509_CRL_pop(out_crls));
+ }
+ }
+
+ return ret;
+}
+
+int PKCS7_get_PEM_certificates(STACK_OF(X509) *out_certs, BIO *pem_bio) {
+ uint8_t *data;
+ long len;
+ int ret;
+
+ // Even though we pass PEM_STRING_PKCS7 as the expected PEM type here, PEM
+ // internally will actually allow several other values too, including
+ // "CERTIFICATE".
+ if (!PEM_bytes_read_bio(&data, &len, NULL /* PEM type output */,
+ PEM_STRING_PKCS7, pem_bio,
+ NULL /* password callback */,
+ NULL /* password callback argument */)) {
+ return 0;
+ }
+
+ CBS cbs;
+ CBS_init(&cbs, data, len);
+ ret = PKCS7_get_certificates(out_certs, &cbs);
+ OPENSSL_free(data);
+ return ret;
+}
+
+int PKCS7_get_PEM_CRLs(STACK_OF(X509_CRL) *out_crls, BIO *pem_bio) {
+ uint8_t *data;
+ long len;
+ int ret;
+
+ // Even though we pass PEM_STRING_PKCS7 as the expected PEM type here, PEM
+ // internally will actually allow several other values too, including
+ // "CERTIFICATE".
+ if (!PEM_bytes_read_bio(&data, &len, NULL /* PEM type output */,
+ PEM_STRING_PKCS7, pem_bio,
+ NULL /* password callback */,
+ NULL /* password callback argument */)) {
+ return 0;
+ }
+
+ CBS cbs;
+ CBS_init(&cbs, data, len);
+ ret = PKCS7_get_CRLs(out_crls, &cbs);
+ OPENSSL_free(data);
+ return ret;
+}
+
+static int pkcs7_bundle_certificates_cb(CBB *out, const void *arg) {
+ const STACK_OF(X509) *certs = arg;
+ size_t i;
+ CBB certificates;
+
+ // See https://tools.ietf.org/html/rfc2315#section-9.1
+ if (!CBB_add_asn1(out, &certificates,
+ CBS_ASN1_CONTEXT_SPECIFIC | CBS_ASN1_CONSTRUCTED | 0)) {
+ return 0;
+ }
+
+ for (i = 0; i < sk_X509_num(certs); i++) {
+ X509 *x509 = sk_X509_value(certs, i);
+ uint8_t *buf;
+ int len = i2d_X509(x509, NULL);
+
+ if (len < 0 ||
+ !CBB_add_space(&certificates, &buf, len) ||
+ i2d_X509(x509, &buf) < 0) {
+ return 0;
+ }
+ }
+
+ return CBB_flush(out);
+}
+
+int PKCS7_bundle_certificates(CBB *out, const STACK_OF(X509) *certs) {
+ return pkcs7_bundle(out, pkcs7_bundle_certificates_cb, certs);
+}
+
+static int pkcs7_bundle_crls_cb(CBB *out, const void *arg) {
+ const STACK_OF(X509_CRL) *crls = arg;
+ size_t i;
+ CBB crl_data;
+
+ // See https://tools.ietf.org/html/rfc2315#section-9.1
+ if (!CBB_add_asn1(out, &crl_data,
+ CBS_ASN1_CONTEXT_SPECIFIC | CBS_ASN1_CONSTRUCTED | 1)) {
+ return 0;
+ }
+
+ for (i = 0; i < sk_X509_CRL_num(crls); i++) {
+ X509_CRL *crl = sk_X509_CRL_value(crls, i);
+ uint8_t *buf;
+ int len = i2d_X509_CRL(crl, NULL);
+
+ if (len < 0 ||
+ !CBB_add_space(&crl_data, &buf, len) ||
+ i2d_X509_CRL(crl, &buf) < 0) {
+ return 0;
+ }
+ }
+
+ return CBB_flush(out);
+}
+
+int PKCS7_bundle_CRLs(CBB *out, const STACK_OF(X509_CRL) *crls) {
+ return pkcs7_bundle(out, pkcs7_bundle_crls_cb, crls);
+}
git://repos.xcallymotion.com / motion2.git / blobdiff