Revert of Removing #defines previously used for building without BoringSSL/OpenSSL.

webrtc/base/messagedigest.cc

 /*
  *  Copyright 2011 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include "webrtc/base/messagedigest.h"
 
 #include <memory>
 
 #include <string.h>
 
 #include "webrtc/base/basictypes.h"
+#include "webrtc/base/sslconfig.h"
+#if SSL_USE_OPENSSL
 #include "webrtc/base/openssldigest.h"
+#else
+#include "webrtc/base/md5digest.h"
+#include "webrtc/base/sha1digest.h"
+#endif
 #include "webrtc/base/stringencode.h"
 
 namespace rtc {
 
 // From RFC 4572.
 const char DIGEST_MD5[]     = "md5";
 const char DIGEST_SHA_1[]   = "sha-1";
 const char DIGEST_SHA_224[] = "sha-224";
 const char DIGEST_SHA_256[] = "sha-256";
 const char DIGEST_SHA_384[] = "sha-384";
 const char DIGEST_SHA_512[] = "sha-512";
 
 static const size_t kBlockSize = 64;  // valid for SHA-256 and down
 
 MessageDigest* MessageDigestFactory::Create(const std::string& alg) {
+#if SSL_USE_OPENSSL
   MessageDigest* digest = new OpenSSLDigest(alg);
   if (digest->Size() == 0) {  // invalid algorithm
     delete digest;
     digest = NULL;
   }
   return digest;
+#else
+  MessageDigest* digest = NULL;
+  if (alg == DIGEST_MD5) {
+    digest = new Md5Digest();
+  } else if (alg == DIGEST_SHA_1) {
+    digest = new Sha1Digest();
+  }
+  return digest;
+#endif
 }
 
 bool IsFips180DigestAlgorithm(const std::string& alg) {
   // These are the FIPS 180 algorithms.  According to RFC 4572 Section 5,
   // "Self-signed certificates (for which legacy certificates are not a
   // consideration) MUST use one of the FIPS 180 algorithms (SHA-1,
   // SHA-224, SHA-256, SHA-384, or SHA-512) as their signature algorithm,
   // and thus also MUST use it to calculate certificate fingerprints."
   return alg == DIGEST_SHA_1 ||
          alg == DIGEST_SHA_224 ||
@@ skipping 108 matching lines @@
 }
 
 std::string ComputeHmac(const std::string& alg, const std::string& key,
                         const std::string& input) {
   std::string output;
   ComputeHmac(alg, key, input, &output);
   return output;
 }
 
 }  // namespace rtc