Fix SignWithOpenSSL in SSLPrivateKey tests.

net/ssl/ssl_private_key_test_util.cc

 // Copyright 2016 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/ssl/ssl_private_key_test_util.h"
 
 #include <stdint.h>
 
 #include <vector>
 
@@ skipping 99 matching lines @@
     return false;
   }
 
   return true;
 }
 
 bool SignWithOpenSSL(const EVP_MD* md,
                      const base::StringPiece& digest,
                      EVP_PKEY* key,
                      std::string* result) {
-  size_t sig_len;
+  size_t sig_len = EVP_PKEY_size(key);
   bssl::UniquePtr<EVP_PKEY_CTX> ctx(EVP_PKEY_CTX_new(key, nullptr));
   if (!ctx || !EVP_PKEY_sign_init(ctx.get()) ||
       !EVP_PKEY_CTX_set_signature_md(ctx.get(), md) ||
-      !EVP_PKEY_sign(ctx.get(), OpenSSLWriteInto(result, EVP_PKEY_size(key)),
-                     &sig_len, reinterpret_cast<const uint8_t*>(digest.data()),
+      !EVP_PKEY_sign(ctx.get(), OpenSSLWriteInto(result, sig_len), &sig_len,
+                     reinterpret_cast<const uint8_t*>(digest.data()),
                      digest.size())) {
     return false;
   }
 
   result->resize(sig_len);
   return true;
 }
 
 void OnSignComplete(base::RunLoop* loop,
                     Error* out_error,
@@ skipping 76 matching lines @@
     if (key->GetType() == SSLPrivateKey::Type::RSA) {
       std::string openssl_signature;
       ASSERT_TRUE(
           SignWithOpenSSL(md, digest, openssl_key.get(), &openssl_signature));
       EXPECT_EQ(openssl_signature, signature);
     }
   }
 }
 
 }  // namespace net