1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "config.h" 6 #include "platform/Crypto.h" 7 8 #include "public/platform/Platform.h" 9 #include "public/platform/WebArrayBuffer.h" 10 #include "public/platform/WebCrypto.h" 11 #include "public/platform/WebCryptoAlgorithm.h" 12 13 namespace blink { 14 15 static blink::WebCryptoAlgorithmId toWebCryptoAlgorithmId(HashAlgorithm algorithm) 16 { 17 switch (algorithm) { 18 case HashAlgorithmSha1: 19 return blink::WebCryptoAlgorithmIdSha1; 20 case HashAlgorithmSha256: 21 return blink::WebCryptoAlgorithmIdSha256; 22 case HashAlgorithmSha384: 23 return blink::WebCryptoAlgorithmIdSha384; 24 case HashAlgorithmSha512: 25 return blink::WebCryptoAlgorithmIdSha512; 26 }; 27 28 ASSERT_NOT_REACHED(); 29 return blink::WebCryptoAlgorithmIdSha256; 30 } 31 32 bool computeDigest(HashAlgorithm algorithm, const char* digestable, size_t length, DigestValue& digestResult) 33 { 34 blink::WebCryptoAlgorithmId algorithmId = toWebCryptoAlgorithmId(algorithm); 35 blink::WebCrypto* crypto = blink::Platform::current()->crypto(); 36 unsigned char* result; 37 unsigned resultSize; 38 39 ASSERT(crypto); 40 41 OwnPtr<blink::WebCryptoDigestor> digestor = adoptPtr(crypto->createDigestor(algorithmId)); 42 if (!digestor.get() || !digestor->consume(reinterpret_cast<const unsigned char*>(digestable), length) || !digestor->finish(result, resultSize)) 43 return false; 44 45 digestResult.append(static_cast<uint8_t*>(result), resultSize); 46 return true; 47 } 48 49 PassOwnPtr<blink::WebCryptoDigestor> createDigestor(HashAlgorithm algorithm) 50 { 51 return adoptPtr(blink::Platform::current()->crypto()->createDigestor(toWebCryptoAlgorithmId(algorithm))); 52 } 53 54 void finishDigestor(blink::WebCryptoDigestor* digestor, DigestValue& digestResult) 55 { 56 unsigned char* result = 0; 57 unsigned resultSize = 0; 58 59 if (!digestor->finish(result, resultSize)) 60 return; 61 62 ASSERT(result); 63 64 digestResult.append(static_cast<uint8_t*>(result), resultSize); 65 } 66 67 } // namespace blink 68
