Revert "Switch to BoringSSL."

net/cert/x509_certificate_openssl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/cert/x509_certificate.h"
 
 #include <openssl/asn1.h>
-#include <openssl/bytestring.h>
 #include <openssl/crypto.h>
 #include <openssl/obj_mac.h>
 #include <openssl/pem.h>
+#include <openssl/pkcs7.h>
 #include <openssl/sha.h>
 #include <openssl/ssl.h>
 #include <openssl/x509v3.h>
 
 #include "base/memory/singleton.h"
 #include "base/pickle.h"
 #include "base/sha1.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "crypto/openssl_util.h"
@@ skipping 11 matching lines @@
 
 namespace {
 
 typedef crypto::ScopedOpenSSL<GENERAL_NAMES, GENERAL_NAMES_free>::Type
     ScopedGENERAL_NAMES;
 
 void CreateOSCertHandlesFromPKCS7Bytes(
     const char* data, int length,
     X509Certificate::OSCertHandles* handles) {
   crypto::EnsureOpenSSLInit();
-  crypto::OpenSSLErrStackTracer err_cleaner(FROM_HERE);
+  const unsigned char* der_data = reinterpret_cast<const unsigned char*>(data);
+  crypto::ScopedOpenSSL<PKCS7, PKCS7_free>::Type pkcs7_cert(
+      d2i_PKCS7(NULL, &der_data, length));
+  if (!pkcs7_cert.get())
+    return;
 
-  CBS der_data;
-  CBS_init(&der_data, reinterpret_cast<const uint8_t*>(data), length);
-  STACK_OF(X509)* certs = sk_X509_new_null();
+  STACK_OF(X509)* certs = NULL;
+  int nid = OBJ_obj2nid(pkcs7_cert.get()->type);
+  if (nid == NID_pkcs7_signed) {
+    certs = pkcs7_cert.get()->d.sign->cert;
+  } else if (nid == NID_pkcs7_signedAndEnveloped) {
+    certs = pkcs7_cert.get()->d.signed_and_enveloped->cert;
+  }
 
-  if (PKCS7_get_certificates(certs, &der_data)) {
-    for (size_t i = 0; i < sk_X509_num(certs); ++i) {
+  if (certs) {
+    for (int i = 0; i < sk_X509_num(certs); ++i) {
       X509* x509_cert =
           X509Certificate::DupOSCertHandle(sk_X509_value(certs, i));
       handles->push_back(x509_cert);
     }
   }
-  sk_X509_pop_free(certs, X509_free);
 }
 
 void ParsePrincipalValues(X509_NAME* name,
                           int nid,
                           std::vector<std::string>* fields) {
   for (int index = -1;
        (index = X509_NAME_get_index_by_NID(name, nid, index)) != -1;) {
     std::string field;
     if (!x509_util::ParsePrincipalValueByIndex(name, index, &field))
       break;
@@ skipping 33 matching lines @@
   int index = X509_get_ext_by_NID(cert, NID_subject_alt_name, -1);
   X509_EXTENSION* alt_name_ext = X509_get_ext(cert, index);
   if (!alt_name_ext)
     return;
 
   ScopedGENERAL_NAMES alt_names(
       reinterpret_cast<GENERAL_NAMES*>(X509V3_EXT_d2i(alt_name_ext)));
   if (!alt_names.get())
     return;
 
-  for (size_t i = 0; i < sk_GENERAL_NAME_num(alt_names.get()); ++i) {
+  for (int i = 0; i < sk_GENERAL_NAME_num(alt_names.get()); ++i) {
     const GENERAL_NAME* name = sk_GENERAL_NAME_value(alt_names.get(), i);
     if (name->type == GEN_DNS && dns_names) {
       const unsigned char* dns_name = ASN1_STRING_data(name->d.dNSName);
       if (!dns_name)
         continue;
       int dns_name_len = ASN1_STRING_length(name->d.dNSName);
       dns_names->push_back(
           std::string(reinterpret_cast<const char*>(dns_name), dns_name_len));
     } else if (name->type == GEN_IPADD && ip_addresses) {
       const unsigned char* ip_addr = name->d.iPAddress->data;
@@ skipping 374 matching lines @@
   for (OSCertHandles::iterator it = intermediate_ca_certs_.begin();
       it != intermediate_ca_certs_.end(); ++it) {
     issuer = X509_get_issuer_name(*it);
     if (issuer == NULL)
       return false;
     cert_names.push_back(issuer);
   }
 
   // and 'cert_names'.
   for (size_t n = 0; n < cert_names.size(); ++n) {
-    for (size_t m = 0; m < sk_X509_NAME_num(issuer_names.get()); ++m) {
+    for (int m = 0; m < sk_X509_NAME_num(issuer_names.get()); ++m) {
       X509_NAME* issuer = sk_X509_NAME_value(issuer_names.get(), m);
       if (X509_NAME_cmp(issuer, cert_names[n]) == 0) {
         return true;
       }
     }
   }
 
   return false;
 }
 
 }  // namespace net