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| 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "net/quic/crypto/aead_base_encrypter.h" | 5 #include "net/quic/crypto/aead_base_encrypter.h" |
| 6 | 6 |
| 7 #include <openssl/err.h> | 7 #include <openssl/err.h> |
| 8 #include <openssl/evp.h> | 8 #include <openssl/evp.h> |
| 9 #include <string.h> | 9 #include <string.h> |
| 10 | 10 |
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| 49 bool AeadBaseEncrypter::SetKey(StringPiece key) { | 49 bool AeadBaseEncrypter::SetKey(StringPiece key) { |
| 50 DCHECK_EQ(key.size(), key_size_); | 50 DCHECK_EQ(key.size(), key_size_); |
| 51 if (key.size() != key_size_) { | 51 if (key.size() != key_size_) { |
| 52 return false; | 52 return false; |
| 53 } | 53 } |
| 54 memcpy(key_, key.data(), key.size()); | 54 memcpy(key_, key.data(), key.size()); |
| 55 | 55 |
| 56 EVP_AEAD_CTX_cleanup(ctx_.get()); | 56 EVP_AEAD_CTX_cleanup(ctx_.get()); |
| 57 | 57 |
| 58 if (!EVP_AEAD_CTX_init(ctx_.get(), aead_alg_, key_, key_size_, | 58 if (!EVP_AEAD_CTX_init(ctx_.get(), aead_alg_, key_, key_size_, |
| 59 auth_tag_size_, NULL)) { | 59 auth_tag_size_, nullptr)) { |
| 60 DLogOpenSslErrors(); | 60 DLogOpenSslErrors(); |
| 61 return false; | 61 return false; |
| 62 } | 62 } |
| 63 | 63 |
| 64 return true; | 64 return true; |
| 65 } | 65 } |
| 66 | 66 |
| 67 bool AeadBaseEncrypter::SetNoncePrefix(StringPiece nonce_prefix) { | 67 bool AeadBaseEncrypter::SetNoncePrefix(StringPiece nonce_prefix) { |
| 68 DCHECK_EQ(nonce_prefix.size(), nonce_prefix_size_); | 68 DCHECK_EQ(nonce_prefix.size(), nonce_prefix_size_); |
| 69 if (nonce_prefix.size() != nonce_prefix_size_) { | 69 if (nonce_prefix.size() != nonce_prefix_size_) { |
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| 110 // TODO(ianswett): Introduce a check to ensure that we don't encrypt with the | 110 // TODO(ianswett): Introduce a check to ensure that we don't encrypt with the |
| 111 // same sequence number twice. | 111 // same sequence number twice. |
| 112 uint8 nonce[sizeof(nonce_prefix_) + sizeof(sequence_number)]; | 112 uint8 nonce[sizeof(nonce_prefix_) + sizeof(sequence_number)]; |
| 113 const size_t nonce_size = nonce_prefix_size_ + sizeof(sequence_number); | 113 const size_t nonce_size = nonce_prefix_size_ + sizeof(sequence_number); |
| 114 DCHECK_LE(nonce_size, sizeof(nonce)); | 114 DCHECK_LE(nonce_size, sizeof(nonce)); |
| 115 memcpy(nonce, nonce_prefix_, nonce_prefix_size_); | 115 memcpy(nonce, nonce_prefix_, nonce_prefix_size_); |
| 116 memcpy(nonce + nonce_prefix_size_, &sequence_number, sizeof(sequence_number)); | 116 memcpy(nonce + nonce_prefix_size_, &sequence_number, sizeof(sequence_number)); |
| 117 if (!Encrypt(StringPiece(reinterpret_cast<char*>(nonce), nonce_size), | 117 if (!Encrypt(StringPiece(reinterpret_cast<char*>(nonce), nonce_size), |
| 118 associated_data, plaintext, | 118 associated_data, plaintext, |
| 119 reinterpret_cast<unsigned char*>(ciphertext.get()))) { | 119 reinterpret_cast<unsigned char*>(ciphertext.get()))) { |
| 120 return NULL; | 120 return nullptr; |
| 121 } | 121 } |
| 122 | 122 |
| 123 return new QuicData(ciphertext.release(), ciphertext_size, true); | 123 return new QuicData(ciphertext.release(), ciphertext_size, true); |
| 124 } | 124 } |
| 125 | 125 |
| 126 size_t AeadBaseEncrypter::GetKeySize() const { return key_size_; } | 126 size_t AeadBaseEncrypter::GetKeySize() const { return key_size_; } |
| 127 | 127 |
| 128 size_t AeadBaseEncrypter::GetNoncePrefixSize() const { | 128 size_t AeadBaseEncrypter::GetNoncePrefixSize() const { |
| 129 return nonce_prefix_size_; | 129 return nonce_prefix_size_; |
| 130 } | 130 } |
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| 143 | 143 |
| 144 StringPiece AeadBaseEncrypter::GetNoncePrefix() const { | 144 StringPiece AeadBaseEncrypter::GetNoncePrefix() const { |
| 145 if (nonce_prefix_size_ == 0) { | 145 if (nonce_prefix_size_ == 0) { |
| 146 return StringPiece(); | 146 return StringPiece(); |
| 147 } | 147 } |
| 148 return StringPiece(reinterpret_cast<const char*>(nonce_prefix_), | 148 return StringPiece(reinterpret_cast<const char*>(nonce_prefix_), |
| 149 nonce_prefix_size_); | 149 nonce_prefix_size_); |
| 150 } | 150 } |
| 151 | 151 |
| 152 } // namespace net | 152 } // namespace net |
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