Revert 283813 "Switch to BoringSSL."

trunk/src/content/child/webcrypto/platform_crypto_openssl.cc

Index: trunk/src/content/child/webcrypto/platform_crypto_openssl.cc
===================================================================
--- trunk/src/content/child/webcrypto/platform_crypto_openssl.cc	(revision 283844)
+++ trunk/src/content/child/webcrypto/platform_crypto_openssl.cc	(working copy)
@@ -53,10 +53,12 @@
 namespace {
 
 const EVP_CIPHER* GetAESCipherByKeyLength(unsigned int key_length_bytes) {
-  // OpenSSL supports AES CBC ciphers for only 2 key lengths: 128, 256 bits
+  // OpenSSL supports AES CBC ciphers for only 3 key lengths: 128, 192, 256 bits
   switch (key_length_bytes) {
     case 16:
       return EVP_aes_128_cbc();
+    case 24:
+      return EVP_aes_192_cbc();
     case 32:
       return EVP_aes_256_cbc();
     default:
@@ -437,8 +439,7 @@
   crypto::ScopedOpenSSL<EVP_AEAD_CTX, EVP_AEAD_CTX_cleanup>::Type ctx_cleanup(
       &ctx);
 
-  size_t len;
-  int ok;
+  ssize_t len;
 
   if (mode == DECRYPT) {
     if (data.byte_length() < tag_length_bytes)
@@ -446,34 +447,32 @@
 
     buffer->resize(data.byte_length() - tag_length_bytes);
 
-    ok = EVP_AEAD_CTX_open(&ctx,
-                           Uint8VectorStart(buffer),
-                           &len,
-                           buffer->size(),
-                           iv.bytes(),
-                           iv.byte_length(),
-                           data.bytes(),
-                           data.byte_length(),
-                           additional_data.bytes(),
-                           additional_data.byte_length());
+    len = EVP_AEAD_CTX_open(&ctx,
+                            Uint8VectorStart(buffer),
+                            buffer->size(),
+                            iv.bytes(),
+                            iv.byte_length(),
+                            data.bytes(),
+                            data.byte_length(),
+                            additional_data.bytes(),
+                            additional_data.byte_length());
   } else {
     // No need to check for unsigned integer overflow here (seal fails if
     // the output buffer is too small).
     buffer->resize(data.byte_length() + tag_length_bytes);
 
-    ok = EVP_AEAD_CTX_seal(&ctx,
-                           Uint8VectorStart(buffer),
-                           &len,
-                           buffer->size(),
-                           iv.bytes(),
-                           iv.byte_length(),
-                           data.bytes(),
-                           data.byte_length(),
-                           additional_data.bytes(),
-                           additional_data.byte_length());
+    len = EVP_AEAD_CTX_seal(&ctx,
+                            Uint8VectorStart(buffer),
+                            buffer->size(),
+                            iv.bytes(),
+                            iv.byte_length(),
+                            data.bytes(),
+                            data.byte_length(),
+                            additional_data.bytes(),
+                            additional_data.byte_length());
   }
 
-  if (!ok)
+  if (len < 0)
     return Status::OperationError();
   buffer->resize(len);
   return Status::Success();