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 WebCore {
14
toWebCryptoAlgorithmId(HashAlgorithm algorithm)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
computeDigest(HashAlgorithm algorithm,const char * digestable,size_t length,DigestValue & digestResult)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
createDigestor(HashAlgorithm algorithm)49 PassOwnPtr<blink::WebCryptoDigestor> createDigestor(HashAlgorithm algorithm)
50 {
51 return adoptPtr(blink::Platform::current()->crypto()->createDigestor(toWebCryptoAlgorithmId(algorithm)));
52 }
53
finishDigestor(blink::WebCryptoDigestor * digestor,DigestValue & digestResult)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 WebCore
68