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.
5 #include "content/child/webcrypto/openssl/util_openssl.h"
7 #include <openssl/evp.h>
9 #include "base/stl_util.h"
10 #include "content/child/webcrypto/crypto_data.h"
11 #include "content/child/webcrypto/openssl/key_openssl.h"
12 #include "content/child/webcrypto/platform_crypto.h"
13 #include "content/child/webcrypto/status.h"
14 #include "crypto/openssl_util.h"
21 crypto::EnsureOpenSSLInit();
24 const EVP_MD* GetDigest(blink::WebCryptoAlgorithmId id) {
26 case blink::WebCryptoAlgorithmIdSha1:
28 case blink::WebCryptoAlgorithmIdSha256:
30 case blink::WebCryptoAlgorithmIdSha384:
32 case blink::WebCryptoAlgorithmIdSha512:
39 Status AeadEncryptDecrypt(EncryptOrDecrypt mode,
40 const std::vector<uint8_t>& raw_key,
41 const CryptoData& data,
42 unsigned int tag_length_bytes,
44 const CryptoData& additional_data,
45 const EVP_AEAD* aead_alg,
46 std::vector<uint8_t>* buffer) {
47 crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE);
51 return Status::ErrorUnexpected();
53 if (!EVP_AEAD_CTX_init(&ctx,
55 vector_as_array(&raw_key),
59 return Status::OperationError();
62 crypto::ScopedOpenSSL<EVP_AEAD_CTX, EVP_AEAD_CTX_cleanup>::Type ctx_cleanup(
68 if (mode == DECRYPT) {
69 if (data.byte_length() < tag_length_bytes)
70 return Status::ErrorDataTooSmall();
72 buffer->resize(data.byte_length() - tag_length_bytes);
74 ok = EVP_AEAD_CTX_open(&ctx,
75 vector_as_array(buffer),
82 additional_data.bytes(),
83 additional_data.byte_length());
85 // No need to check for unsigned integer overflow here (seal fails if
86 // the output buffer is too small).
87 buffer->resize(data.byte_length() + EVP_AEAD_max_overhead(aead_alg));
89 ok = EVP_AEAD_CTX_seal(&ctx,
90 vector_as_array(buffer),
97 additional_data.bytes(),
98 additional_data.byte_length());
102 return Status::OperationError();
104 return Status::Success();
107 } // namespace webcrypto
109 } // namespace content