Certificate Transparency: Code for unpacking EV cert hashes whitelist

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>
@@ skipping 282 matching lines @@
 SHA1HashValue X509Certificate::CalculateFingerprint(OSCertHandle cert) {
   SHA1HashValue sha1;
   unsigned int sha1_size = static_cast<unsigned int>(sizeof(sha1.data));
   int ret = X509_digest(cert, EVP_sha1(), sha1.data, &sha1_size);
   CHECK(ret);
   CHECK_EQ(sha1_size, sizeof(sha1.data));
   return sha1;
 }
 
 // static
+SHA256HashValue X509Certificate::CalculateFingerprint256(OSCertHandle cert) {
+  SHA256HashValue sha256;
+  unsigned int sha256_size = static_cast<unsigned int>(sizeof(sha256.data));
+  int ret = X509_digest(cert, EVP_sha256(), sha256.data, &sha256_size);
+  CHECK(ret);
+  CHECK_EQ(sha256_size, sizeof(sha256.data));
+  return sha256;
+}
+
+// static
 SHA1HashValue X509Certificate::CalculateCAFingerprint(
     const OSCertHandles& intermediates) {
   SHA1HashValue sha1;
   memset(sha1.data, 0, sizeof(sha1.data));
 
   SHA_CTX sha1_ctx;
   SHA1_Init(&sha1_ctx);
   DERCache der_cache;
   for (size_t i = 0; i < intermediates.size(); ++i) {
     if (!GetDERAndCacheIfNeeded(intermediates[i], &der_cache))
@@ skipping 194 matching lines @@
       if (X509_NAME_cmp(issuer, cert_names[n]) == 0) {
         return true;
       }
     }
   }
 
   return false;
 }
 
 }  // namespace net