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< li class = "navelem" > < a class = "el" href = "../../dir_39dc0668bd5a501998f94e8b4e546c71.html" > media< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_c6ada2450b25ab5438a4dba6c9b890af.html" > base< / a > < / li > < / ul >
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< div class = "title" > aes_encryptor.cc< / div > < / div >
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< div class = "contents" >
< div class = "fragment" > < div class = "line" > < a name = "l00001" > < / a > < span class = "lineno" > 1< / span >   < span class = "comment" > // Copyright 2014 Google Inc. All rights reserved.< / span > < / div >
< div class = "line" > < a name = "l00002" > < / a > < span class = "lineno" > 2< / span >   < span class = "comment" > //< / span > < / div >
< div class = "line" > < a name = "l00003" > < / a > < span class = "lineno" > 3< / span >   < span class = "comment" > // Use of this source code is governed by a BSD-style< / span > < / div >
< div class = "line" > < a name = "l00004" > < / a > < span class = "lineno" > 4< / span >   < span class = "comment" > // license that can be found in the LICENSE file or at< / span > < / div >
< div class = "line" > < a name = "l00005" > < / a > < span class = "lineno" > 5< / span >   < span class = "comment" > // https://developers.google.com/open-source/licenses/bsd< / span > < / div >
< div class = "line" > < a name = "l00006" > < / a > < span class = "lineno" > 6< / span >   < / div >
< div class = "line" > < a name = "l00007" > < / a > < span class = "lineno" > 7< / span >   < span class = "preprocessor" > #include " packager/media/base/aes_encryptor.h" < / span > < / div >
< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < / div >
< div class = "line" > < a name = "l00009" > < / a > < span class = "lineno" > 9< / span >   < span class = "preprocessor" > #include < openssl/aes.h> < / span > < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < span class = "preprocessor" > #include < openssl/err.h> < / span > < / div >
< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   < span class = "preprocessor" > #include < openssl/rand.h> < / span > < / div >
< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   < / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < span class = "preprocessor" > #include " packager/base/logging.h" < / span > < / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < span class = "keyword" > namespace < / span > {< / div >
< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   < / div >
< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   < span class = "comment" > // Increment an 8-byte counter by 1. Return true if overflowed.< / span > < / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < span class = "keywordtype" > bool< / span > Increment64(uint8_t* counter) {< / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   DCHECK(counter);< / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 7; i > = 0; --i)< / div >
< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   < span class = "keywordflow" > if< / span > (++counter[i] != 0)< / div >
< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   }< / div >
< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > 25< / span >   < / div >
< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   < span class = "comment" > // According to ISO/IEC FDIS 23001-7: CENC spec, IV should be either< / span > < / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   < span class = "comment" > // 64-bit (8-byte) or 128-bit (16-byte).< / span > < / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   < span class = "keywordtype" > bool< / span > IsIvSizeValid(< span class = "keywordtype" > size_t< / span > iv_size) { < span class = "keywordflow" > return< / span > iv_size == 8 || iv_size == 16; }< / div >
< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   < / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   < span class = "comment" > // AES defines three key sizes: 128, 192 and 256 bits.< / span > < / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   < span class = "keywordtype" > bool< / span > IsKeySizeValidForAes(< span class = "keywordtype" > size_t< / span > key_size) {< / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   < span class = "keywordflow" > return< / span > key_size == 16 || key_size == 24 || key_size == 32;< / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   }< / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   < / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   < span class = "comment" > // CENC protection scheme uses 128-bit keys in counter mode.< / span > < / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   < span class = "keyword" > const< / span > uint32_t kCencKeySize = 16;< / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   < / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   } < span class = "comment" > // namespace< / span > < / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   < / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   < span class = "keyword" > namespace < / span > edash_packager {< / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   < span class = "keyword" > namespace < / span > media {< / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   < / div >
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< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   AesEncryptor::AesEncryptor() {}< / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   AesEncryptor::~AesEncryptor() {}< / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   < / div >
< div class = "line" > < a name = "l00046" > < / a > < span class = "lineno" > < a class = "line" href = "../../dc/d92/classedash__packager_1_1media_1_1AesEncryptor.html#a49631d3d3d834bf7d78e0d51d7b33651" > 46< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../dc/d92/classedash__packager_1_1media_1_1AesEncryptor.html#a49631d3d3d834bf7d78e0d51d7b33651" > AesEncryptor::InitializeWithRandomIv< / a > (< / div >
< div class = "line" > < a name = "l00047" > < / a > < span class = "lineno" > 47< / span >   < span class = "keyword" > const< / span > std::vector< uint8_t> & key,< / div >
< div class = "line" > < a name = "l00048" > < / a > < span class = "lineno" > 48< / span >   uint8_t iv_size) {< / div >
< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   std::vector< uint8_t> iv(iv_size, 0);< / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   < span class = "keywordflow" > if< / span > (RAND_bytes(& iv[0], iv_size) != 1) {< / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   LOG(ERROR) < < < span class = "stringliteral" > " RAND_bytes failed with error: " < / span > < / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   < < ERR_error_string(ERR_get_error(), NULL);< / div >
< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   }< / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   < span class = "keywordflow" > return< / span > < a class = "code" href = "../../dc/d92/classedash__packager_1_1media_1_1AesEncryptor.html#a6c225492907f281a7c08a76e012f8ba7" > InitializeWithIv< / a > (key, iv);< / div >
< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   }< / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   < / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   < span class = "keywordtype" > bool< / span > AesEncryptor::Encrypt(< span class = "keyword" > const< / span > std::vector< uint8_t> & plaintext,< / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   std::vector< uint8_t> * ciphertext) {< / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   < span class = "keywordflow" > if< / span > (plaintext.empty())< / div >
< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > 61< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   ciphertext-> resize(plaintext.size() + NumPaddingBytes(plaintext.size()));< / div >
< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   < span class = "keywordflow" > return< / span > EncryptData(plaintext.data(), plaintext.size(), ciphertext-> data());< / div >
< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   }< / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   < / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   < span class = "keywordtype" > bool< / span > AesEncryptor::Encrypt(< span class = "keyword" > const< / span > std::string& plaintext,< / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   std::string* ciphertext) {< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   ciphertext-> resize(plaintext.size() + NumPaddingBytes(plaintext.size()));< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < span class = "keywordflow" > return< / span > EncryptData(reinterpret_cast< const uint8_t*> (plaintext.data()),< / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > 70< / span >   plaintext.size(),< / div >
< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   < span class = "keyword" > reinterpret_cast< < / span > uint8_t*< span class = "keyword" > > < / span > (string_as_array(ciphertext)));< / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   }< / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   < / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   AesCtrEncryptor::AesCtrEncryptor()< / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   : block_offset_(0),< / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   encrypted_counter_(AES_BLOCK_SIZE, 0),< / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   counter_overflow_(false) {< / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   COMPILE_ASSERT(AES_BLOCK_SIZE == kCencKeySize,< / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   cenc_key_size_should_be_the_same_as_aes_block_size);< / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   }< / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   < / div >
< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   AesCtrEncryptor::~AesCtrEncryptor() {}< / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   < / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > < a class = "line" href = "../../dd/d79/classedash__packager_1_1media_1_1AesCtrEncryptor.html#a2fa3278643f5d2ef4083a04ad44933f3" > 84< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../dd/d79/classedash__packager_1_1media_1_1AesCtrEncryptor.html#a2fa3278643f5d2ef4083a04ad44933f3" > AesCtrEncryptor::InitializeWithIv< / a > (< span class = "keyword" > const< / span > std::vector< uint8_t> & key,< / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   < span class = "keyword" > const< / span > std::vector< uint8_t> & iv) {< / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   < span class = "keywordflow" > if< / span > (key.size() != kCencKeySize) {< / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Invalid key size of " < / span > < < key.size() < < < span class = "stringliteral" > " for CENC." < / span > ;< / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   }< / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   < span class = "keywordflow" > if< / span > (!IsIvSizeValid(iv.size())) {< / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Invalid IV size: " < / span > < < iv.size();< / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   }< / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   < / div >
< div class = "line" > < a name = "l00095" > < / a > < span class = "lineno" > 95< / span >   aes_key_.reset(< span class = "keyword" > new< / span > AES_KEY());< / div >
< div class = "line" > < a name = "l00096" > < / a > < span class = "lineno" > 96< / span >   CHECK_EQ(AES_set_encrypt_key(& key[0], AES_BLOCK_SIZE * 8, aes_key_.get()), 0);< / div >
< div class = "line" > < a name = "l00097" > < / a > < span class = "lineno" > 97< / span >   < span class = "keywordflow" > return< / span > < a class = "code" href = "../../dd/d79/classedash__packager_1_1media_1_1AesCtrEncryptor.html#ac70e6553917ad948fb2c18101de0f8d9" > SetIv< / a > (iv);< / div >
< div class = "line" > < a name = "l00098" > < / a > < span class = "lineno" > 98< / span >   }< / div >
< div class = "line" > < a name = "l00099" > < / a > < span class = "lineno" > 99< / span >   < / div >
< div class = "line" > < a name = "l00100" > < / a > < span class = "lineno" > 100< / span >   < span class = "keywordtype" > size_t< / span > AesCtrEncryptor::NumPaddingBytes(< span class = "keywordtype" > size_t< / span > size) {< / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   < span class = "keywordflow" > return< / span > 0;< / div >
2015-10-16 00:33:37 +00:00
< div class = "line" > < a name = "l00102" > < / a > < span class = "lineno" > 102< / span >   }< / div >
< div class = "line" > < a name = "l00103" > < / a > < span class = "lineno" > 103< / span >   < / div >
2016-03-18 05:18:31 +00:00
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   < span class = "keywordtype" > bool< / span > AesCtrEncryptor::EncryptData(< span class = "keyword" > const< / span > uint8_t* plaintext,< / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   < span class = "keywordtype" > size_t< / span > plaintext_size,< / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   uint8_t* ciphertext) {< / div >
< div class = "line" > < a name = "l00107" > < / a > < span class = "lineno" > 107< / span >   DCHECK(plaintext);< / div >
< div class = "line" > < a name = "l00108" > < / a > < span class = "lineno" > 108< / span >   DCHECK(ciphertext);< / div >
< div class = "line" > < a name = "l00109" > < / a > < span class = "lineno" > 109< / span >   DCHECK(aes_key_);< / div >
< div class = "line" > < a name = "l00110" > < / a > < span class = "lineno" > 110< / span >   < / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < plaintext_size; ++i) {< / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   < span class = "keywordflow" > if< / span > (block_offset_ == 0) {< / div >
< div class = "line" > < a name = "l00113" > < / a > < span class = "lineno" > 113< / span >   AES_encrypt(& counter_[0], & encrypted_counter_[0], aes_key_.get());< / div >
< div class = "line" > < a name = "l00114" > < / a > < span class = "lineno" > 114< / span >   < span class = "comment" > // As mentioned in ISO/IEC FDIS 23001-7: CENC spec, of the 16 byte counter< / span > < / div >
< div class = "line" > < a name = "l00115" > < / a > < span class = "lineno" > 115< / span >   < span class = "comment" > // block, bytes 8 to 15 (i.e. the least significant bytes) are used as a< / span > < / div >
< div class = "line" > < a name = "l00116" > < / a > < span class = "lineno" > 116< / span >   < span class = "comment" > // simple 64 bit unsigned integer that is incremented by one for each< / span > < / div >
< div class = "line" > < a name = "l00117" > < / a > < span class = "lineno" > 117< / span >   < span class = "comment" > // subsequent block of sample data processed and is kept in network byte< / span > < / div >
< div class = "line" > < a name = "l00118" > < / a > < span class = "lineno" > 118< / span >   < span class = "comment" > // order.< / span > < / div >
< div class = "line" > < a name = "l00119" > < / a > < span class = "lineno" > 119< / span >   < span class = "keywordflow" > if< / span > (Increment64(& counter_[8]))< / div >
< div class = "line" > < a name = "l00120" > < / a > < span class = "lineno" > 120< / span >   counter_overflow_ = < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00121" > < / a > < span class = "lineno" > 121< / span >   }< / div >
< div class = "line" > < a name = "l00122" > < / a > < span class = "lineno" > 122< / span >   ciphertext[i] = plaintext[i] ^ encrypted_counter_[block_offset_];< / div >
< div class = "line" > < a name = "l00123" > < / a > < span class = "lineno" > 123< / span >   block_offset_ = (block_offset_ + 1) % AES_BLOCK_SIZE;< / div >
< div class = "line" > < a name = "l00124" > < / a > < span class = "lineno" > 124< / span >   }< / div >
< div class = "line" > < a name = "l00125" > < / a > < span class = "lineno" > 125< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00126" > < / a > < span class = "lineno" > 126< / span >   }< / div >
< div class = "line" > < a name = "l00127" > < / a > < span class = "lineno" > 127< / span >   < / div >
< div class = "line" > < a name = "l00128" > < / a > < span class = "lineno" > < a class = "line" href = "../../dd/d79/classedash__packager_1_1media_1_1AesCtrEncryptor.html#a27cc6076b6f5edd8c096753ae157a1db" > 128< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "../../dd/d79/classedash__packager_1_1media_1_1AesCtrEncryptor.html#a27cc6076b6f5edd8c096753ae157a1db" > AesCtrEncryptor::UpdateIv< / a > () {< / div >
< div class = "line" > < a name = "l00129" > < / a > < span class = "lineno" > 129< / span >   block_offset_ = 0;< / div >
< div class = "line" > < a name = "l00130" > < / a > < span class = "lineno" > 130< / span >   < / div >
< div class = "line" > < a name = "l00131" > < / a > < span class = "lineno" > 131< / span >   < span class = "comment" > // As recommended in ISO/IEC FDIS 23001-7: CENC spec, for 64-bit (8-byte)< / span > < / div >
< div class = "line" > < a name = "l00132" > < / a > < span class = "lineno" > 132< / span >   < span class = "comment" > // IV_Sizes, initialization vectors for subsequent samples can be created by< / span > < / div >
< div class = "line" > < a name = "l00133" > < / a > < span class = "lineno" > 133< / span >   < span class = "comment" > // incrementing the initialization vector of the previous sample.< / span > < / div >
< div class = "line" > < a name = "l00134" > < / a > < span class = "lineno" > 134< / span >   < span class = "comment" > // For 128-bit (16-byte) IV_Sizes, initialization vectors for subsequent< / span > < / div >
< div class = "line" > < a name = "l00135" > < / a > < span class = "lineno" > 135< / span >   < span class = "comment" > // samples should be created by adding the block count of the previous sample< / span > < / div >
< div class = "line" > < a name = "l00136" > < / a > < span class = "lineno" > 136< / span >   < span class = "comment" > // to the initialization vector of the previous sample.< / span > < / div >
< div class = "line" > < a name = "l00137" > < / a > < span class = "lineno" > 137< / span >   < span class = "keywordflow" > if< / span > (iv_.size() == 8) {< / div >
< div class = "line" > < a name = "l00138" > < / a > < span class = "lineno" > 138< / span >   Increment64(& iv_[0]);< / div >
< div class = "line" > < a name = "l00139" > < / a > < span class = "lineno" > 139< / span >   counter_ = iv_;< / div >
< div class = "line" > < a name = "l00140" > < / a > < span class = "lineno" > 140< / span >   counter_.resize(AES_BLOCK_SIZE, 0);< / div >
< div class = "line" > < a name = "l00141" > < / a > < span class = "lineno" > 141< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00142" > < / a > < span class = "lineno" > 142< / span >   DCHECK_EQ(16u, iv_.size());< / div >
< div class = "line" > < a name = "l00143" > < / a > < span class = "lineno" > 143< / span >   < span class = "comment" > // Even though the block counter portion of the counter (bytes 8 to 15) is< / span > < / div >
< div class = "line" > < a name = "l00144" > < / a > < span class = "lineno" > 144< / span >   < span class = "comment" > // treated as a 64-bit number, it is recommended that the initialization< / span > < / div >
< div class = "line" > < a name = "l00145" > < / a > < span class = "lineno" > 145< / span >   < span class = "comment" > // vector is treated as a 128-bit number when calculating the next< / span > < / div >
< div class = "line" > < a name = "l00146" > < / a > < span class = "lineno" > 146< / span >   < span class = "comment" > // initialization vector from the previous one. The block counter portion< / span > < / div >
< div class = "line" > < a name = "l00147" > < / a > < span class = "lineno" > 147< / span >   < span class = "comment" > // is already incremented by number of blocks, the other 64 bits of the< / span > < / div >
< div class = "line" > < a name = "l00148" > < / a > < span class = "lineno" > 148< / span >   < span class = "comment" > // counter (bytes 0 to 7) is incremented here if the block counter portion< / span > < / div >
< div class = "line" > < a name = "l00149" > < / a > < span class = "lineno" > 149< / span >   < span class = "comment" > // has overflowed.< / span > < / div >
< div class = "line" > < a name = "l00150" > < / a > < span class = "lineno" > 150< / span >   < span class = "keywordflow" > if< / span > (counter_overflow_)< / div >
< div class = "line" > < a name = "l00151" > < / a > < span class = "lineno" > 151< / span >   Increment64(& counter_[0]);< / div >
< div class = "line" > < a name = "l00152" > < / a > < span class = "lineno" > 152< / span >   iv_ = counter_;< / div >
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< div class = "line" > < a name = "l00153" > < / a > < span class = "lineno" > 153< / span >   }< / div >
2016-03-18 05:18:31 +00:00
< div class = "line" > < a name = "l00154" > < / a > < span class = "lineno" > 154< / span >   counter_overflow_ = < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00155" > < / a > < span class = "lineno" > 155< / span >   }< / div >
< div class = "line" > < a name = "l00156" > < / a > < span class = "lineno" > 156< / span >   < / div >
< div class = "line" > < a name = "l00157" > < / a > < span class = "lineno" > < a class = "line" href = "../../dd/d79/classedash__packager_1_1media_1_1AesCtrEncryptor.html#ac70e6553917ad948fb2c18101de0f8d9" > 157< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../dd/d79/classedash__packager_1_1media_1_1AesCtrEncryptor.html#ac70e6553917ad948fb2c18101de0f8d9" > AesCtrEncryptor::SetIv< / a > (< span class = "keyword" > const< / span > std::vector< uint8_t> & iv) {< / div >
< div class = "line" > < a name = "l00158" > < / a > < span class = "lineno" > 158< / span >   < span class = "keywordflow" > if< / span > (!IsIvSizeValid(iv.size())) {< / div >
< div class = "line" > < a name = "l00159" > < / a > < span class = "lineno" > 159< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Invalid IV size: " < / span > < < iv.size();< / div >
< div class = "line" > < a name = "l00160" > < / a > < span class = "lineno" > 160< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00161" > < / a > < span class = "lineno" > 161< / span >   }< / div >
< div class = "line" > < a name = "l00162" > < / a > < span class = "lineno" > 162< / span >   < / div >
< div class = "line" > < a name = "l00163" > < / a > < span class = "lineno" > 163< / span >   block_offset_ = 0;< / div >
< div class = "line" > < a name = "l00164" > < / a > < span class = "lineno" > 164< / span >   counter_ = iv_ = iv;< / div >
< div class = "line" > < a name = "l00165" > < / a > < span class = "lineno" > 165< / span >   counter_.resize(AES_BLOCK_SIZE, 0);< / div >
< div class = "line" > < a name = "l00166" > < / a > < span class = "lineno" > 166< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00167" > < / a > < span class = "lineno" > 167< / span >   }< / div >
< div class = "line" > < a name = "l00168" > < / a > < span class = "lineno" > 168< / span >   < / div >
< div class = "line" > < a name = "l00169" > < / a > < span class = "lineno" > 169< / span >   AesCbcPkcs5Encryptor::AesCbcPkcs5Encryptor() {}< / div >
< div class = "line" > < a name = "l00170" > < / a > < span class = "lineno" > 170< / span >   AesCbcPkcs5Encryptor::~AesCbcPkcs5Encryptor() {}< / div >
< div class = "line" > < a name = "l00171" > < / a > < span class = "lineno" > 171< / span >   < / div >
< div class = "line" > < a name = "l00172" > < / a > < span class = "lineno" > < a class = "line" href = "../../d6/dc4/classedash__packager_1_1media_1_1AesCbcPkcs5Encryptor.html#acff7cfca3a800344952a86e13dfad896" > 172< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../d6/dc4/classedash__packager_1_1media_1_1AesCbcPkcs5Encryptor.html#acff7cfca3a800344952a86e13dfad896" > AesCbcPkcs5Encryptor::InitializeWithIv< / a > (< span class = "keyword" > const< / span > std::vector< uint8_t> & key,< / div >
< div class = "line" > < a name = "l00173" > < / a > < span class = "lineno" > 173< / span >   < span class = "keyword" > const< / span > std::vector< uint8_t> & iv) {< / div >
< div class = "line" > < a name = "l00174" > < / a > < span class = "lineno" > 174< / span >   < span class = "keywordflow" > if< / span > (!IsKeySizeValidForAes(key.size())) {< / div >
< div class = "line" > < a name = "l00175" > < / a > < span class = "lineno" > 175< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Invalid AES key size: " < / span > < < key.size();< / div >
< div class = "line" > < a name = "l00176" > < / a > < span class = "lineno" > 176< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00177" > < / a > < span class = "lineno" > 177< / span >   }< / div >
< div class = "line" > < a name = "l00178" > < / a > < span class = "lineno" > 178< / span >   < span class = "keywordflow" > if< / span > (iv.size() != AES_BLOCK_SIZE) {< / div >
< div class = "line" > < a name = "l00179" > < / a > < span class = "lineno" > 179< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Invalid IV size: " < / span > < < iv.size();< / div >
< div class = "line" > < a name = "l00180" > < / a > < span class = "lineno" > 180< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00181" > < / a > < span class = "lineno" > 181< / span >   }< / div >
< div class = "line" > < a name = "l00182" > < / a > < span class = "lineno" > 182< / span >   < / div >
< div class = "line" > < a name = "l00183" > < / a > < span class = "lineno" > 183< / span >   aes_key_.reset(< span class = "keyword" > new< / span > AES_KEY());< / div >
< div class = "line" > < a name = "l00184" > < / a > < span class = "lineno" > 184< / span >   CHECK_EQ(AES_set_encrypt_key(& key[0], key.size() * 8, aes_key_.get()), 0);< / div >
< div class = "line" > < a name = "l00185" > < / a > < span class = "lineno" > 185< / span >   < / div >
< div class = "line" > < a name = "l00186" > < / a > < span class = "lineno" > 186< / span >   iv_ = iv;< / div >
< div class = "line" > < a name = "l00187" > < / a > < span class = "lineno" > 187< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00188" > < / a > < span class = "lineno" > 188< / span >   }< / div >
< div class = "line" > < a name = "l00189" > < / a > < span class = "lineno" > 189< / span >   < / div >
< div class = "line" > < a name = "l00190" > < / a > < span class = "lineno" > 190< / span >   < span class = "keywordtype" > size_t< / span > AesCbcPkcs5Encryptor::NumPaddingBytes(< span class = "keywordtype" > size_t< / span > size) {< / div >
< div class = "line" > < a name = "l00191" > < / a > < span class = "lineno" > 191< / span >   < span class = "keywordflow" > return< / span > AES_BLOCK_SIZE - (size % AES_BLOCK_SIZE);< / div >
< div class = "line" > < a name = "l00192" > < / a > < span class = "lineno" > 192< / span >   }< / div >
< div class = "line" > < a name = "l00193" > < / a > < span class = "lineno" > 193< / span >   < / div >
< div class = "line" > < a name = "l00194" > < / a > < span class = "lineno" > 194< / span >   < span class = "keywordtype" > bool< / span > AesCbcPkcs5Encryptor::EncryptData(< span class = "keyword" > const< / span > uint8_t* plaintext,< / div >
< div class = "line" > < a name = "l00195" > < / a > < span class = "lineno" > 195< / span >   < span class = "keywordtype" > size_t< / span > plaintext_size,< / div >
< div class = "line" > < a name = "l00196" > < / a > < span class = "lineno" > 196< / span >   uint8_t* ciphertext) {< / div >
< div class = "line" > < a name = "l00197" > < / a > < span class = "lineno" > 197< / span >   DCHECK(ciphertext);< / div >
< div class = "line" > < a name = "l00198" > < / a > < span class = "lineno" > 198< / span >   DCHECK(aes_key_);< / div >
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< div class = "line" > < a name = "l00199" > < / a > < span class = "lineno" > 199< / span >   < / div >
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< div class = "line" > < a name = "l00200" > < / a > < span class = "lineno" > 200< / span >   < span class = "comment" > // Pad the input with PKCS5 padding.< / span > < / div >
< div class = "line" > < a name = "l00201" > < / a > < span class = "lineno" > 201< / span >   < span class = "comment" > // TODO(kqyang): Consider more efficient implementation.< / span > < / div >
< div class = "line" > < a name = "l00202" > < / a > < span class = "lineno" > 202< / span >   memcpy(ciphertext, plaintext, plaintext_size);< / div >
< div class = "line" > < a name = "l00203" > < / a > < span class = "lineno" > 203< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = plaintext_size;< / div >
< div class = "line" > < a name = "l00204" > < / a > < span class = "lineno" > 204< / span >   i < plaintext_size + NumPaddingBytes(plaintext_size); ++i) {< / div >
< div class = "line" > < a name = "l00205" > < / a > < span class = "lineno" > 205< / span >   ciphertext[i] = NumPaddingBytes(plaintext_size);< / div >
< div class = "line" > < a name = "l00206" > < / a > < span class = "lineno" > 206< / span >   }< / div >
< div class = "line" > < a name = "l00207" > < / a > < span class = "lineno" > 207< / span >   < / div >
< div class = "line" > < a name = "l00208" > < / a > < span class = "lineno" > 208< / span >   std::vector< uint8_t> iv(iv_);< / div >
< div class = "line" > < a name = "l00209" > < / a > < span class = "lineno" > 209< / span >   AES_cbc_encrypt(ciphertext, ciphertext,< / div >
< div class = "line" > < a name = "l00210" > < / a > < span class = "lineno" > 210< / span >   plaintext_size + NumPaddingBytes(plaintext_size),< / div >
< div class = "line" > < a name = "l00211" > < / a > < span class = "lineno" > 211< / span >   aes_key_.get(), & iv[0], AES_ENCRYPT);< / div >
< div class = "line" > < a name = "l00212" > < / a > < span class = "lineno" > 212< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00213" > < / a > < span class = "lineno" > 213< / span >   }< / div >
< div class = "line" > < a name = "l00214" > < / a > < span class = "lineno" > 214< / span >   < / div >
< div class = "line" > < a name = "l00215" > < / a > < span class = "lineno" > < a class = "line" href = "../../d6/dc4/classedash__packager_1_1media_1_1AesCbcPkcs5Encryptor.html#aab27a1d7244f1dcdd7aa75b0fc1be995" > 215< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "../../d6/dc4/classedash__packager_1_1media_1_1AesCbcPkcs5Encryptor.html#aab27a1d7244f1dcdd7aa75b0fc1be995" > AesCbcPkcs5Encryptor::UpdateIv< / a > () {}< / div >
< div class = "line" > < a name = "l00216" > < / a > < span class = "lineno" > 216< / span >   < / div >
< div class = "line" > < a name = "l00217" > < / a > < span class = "lineno" > < a class = "line" href = "../../d6/dc4/classedash__packager_1_1media_1_1AesCbcPkcs5Encryptor.html#ad21bb8d1ea5aa49645c9b3476f6bcc8a" > 217< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../d6/dc4/classedash__packager_1_1media_1_1AesCbcPkcs5Encryptor.html#ad21bb8d1ea5aa49645c9b3476f6bcc8a" > AesCbcPkcs5Encryptor::SetIv< / a > (< span class = "keyword" > const< / span > std::vector< uint8_t> & iv) {< / div >
< div class = "line" > < a name = "l00218" > < / a > < span class = "lineno" > 218< / span >   < span class = "keywordflow" > if< / span > (iv.size() != AES_BLOCK_SIZE) {< / div >
< div class = "line" > < a name = "l00219" > < / a > < span class = "lineno" > 219< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Invalid IV size: " < / span > < < iv.size();< / div >
< div class = "line" > < a name = "l00220" > < / a > < span class = "lineno" > 220< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00221" > < / a > < span class = "lineno" > 221< / span >   }< / div >
< div class = "line" > < a name = "l00222" > < / a > < span class = "lineno" > 222< / span >   < / div >
< div class = "line" > < a name = "l00223" > < / a > < span class = "lineno" > 223< / span >   iv_ = iv;< / div >
< div class = "line" > < a name = "l00224" > < / a > < span class = "lineno" > 224< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00225" > < / a > < span class = "lineno" > 225< / span >   }< / div >
< div class = "line" > < a name = "l00226" > < / a > < span class = "lineno" > 226< / span >   < / div >
< div class = "line" > < a name = "l00227" > < / a > < span class = "lineno" > 227< / span >   AesCbcCtsEncryptor::AesCbcCtsEncryptor() {}< / div >
< div class = "line" > < a name = "l00228" > < / a > < span class = "lineno" > 228< / span >   AesCbcCtsEncryptor::~AesCbcCtsEncryptor() {}< / div >
< div class = "line" > < a name = "l00229" > < / a > < span class = "lineno" > 229< / span >   < / div >
< div class = "line" > < a name = "l00230" > < / a > < span class = "lineno" > < a class = "line" href = "../../d6/da2/classedash__packager_1_1media_1_1AesCbcCtsEncryptor.html#ad9f134c35f24ebf4c1877ad76f8622b7" > 230< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../d6/da2/classedash__packager_1_1media_1_1AesCbcCtsEncryptor.html#ad9f134c35f24ebf4c1877ad76f8622b7" > AesCbcCtsEncryptor::InitializeWithIv< / a > (< span class = "keyword" > const< / span > std::vector< uint8_t> & key,< / div >
< div class = "line" > < a name = "l00231" > < / a > < span class = "lineno" > 231< / span >   < span class = "keyword" > const< / span > std::vector< uint8_t> & iv) {< / div >
< div class = "line" > < a name = "l00232" > < / a > < span class = "lineno" > 232< / span >   < span class = "keywordflow" > if< / span > (!IsKeySizeValidForAes(key.size())) {< / div >
< div class = "line" > < a name = "l00233" > < / a > < span class = "lineno" > 233< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Invalid AES key size: " < / span > < < key.size();< / div >
< div class = "line" > < a name = "l00234" > < / a > < span class = "lineno" > 234< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00235" > < / a > < span class = "lineno" > 235< / span >   }< / div >
< div class = "line" > < a name = "l00236" > < / a > < span class = "lineno" > 236< / span >   < span class = "keywordflow" > if< / span > (iv.size() != AES_BLOCK_SIZE) {< / div >
< div class = "line" > < a name = "l00237" > < / a > < span class = "lineno" > 237< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Invalid IV size: " < / span > < < iv.size();< / div >
< div class = "line" > < a name = "l00238" > < / a > < span class = "lineno" > 238< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00239" > < / a > < span class = "lineno" > 239< / span >   }< / div >
< div class = "line" > < a name = "l00240" > < / a > < span class = "lineno" > 240< / span >   < / div >
< div class = "line" > < a name = "l00241" > < / a > < span class = "lineno" > 241< / span >   aes_key_.reset(< span class = "keyword" > new< / span > AES_KEY());< / div >
< div class = "line" > < a name = "l00242" > < / a > < span class = "lineno" > 242< / span >   CHECK_EQ(AES_set_encrypt_key(& key[0], key.size() * 8, aes_key_.get()), 0);< / div >
< div class = "line" > < a name = "l00243" > < / a > < span class = "lineno" > 243< / span >   < / div >
< div class = "line" > < a name = "l00244" > < / a > < span class = "lineno" > 244< / span >   iv_ = iv;< / div >
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< div class = "line" > < a name = "l00245" > < / a > < span class = "lineno" > 245< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00246" > < / a > < span class = "lineno" > 246< / span >   }< / div >
< div class = "line" > < a name = "l00247" > < / a > < span class = "lineno" > 247< / span >   < / div >
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< div class = "line" > < a name = "l00248" > < / a > < span class = "lineno" > 248< / span >   < span class = "keywordtype" > size_t< / span > AesCbcCtsEncryptor::NumPaddingBytes(< span class = "keywordtype" > size_t< / span > size) {< / div >
< div class = "line" > < a name = "l00249" > < / a > < span class = "lineno" > 249< / span >   < span class = "keywordflow" > return< / span > 0;< / div >
< div class = "line" > < a name = "l00250" > < / a > < span class = "lineno" > 250< / span >   }< / div >
< div class = "line" > < a name = "l00251" > < / a > < span class = "lineno" > 251< / span >   < / div >
< div class = "line" > < a name = "l00252" > < / a > < span class = "lineno" > 252< / span >   < span class = "keywordtype" > bool< / span > AesCbcCtsEncryptor::EncryptData(< span class = "keyword" > const< / span > uint8_t* plaintext,< / div >
< div class = "line" > < a name = "l00253" > < / a > < span class = "lineno" > 253< / span >   < span class = "keywordtype" > size_t< / span > size,< / div >
< div class = "line" > < a name = "l00254" > < / a > < span class = "lineno" > 254< / span >   uint8_t* ciphertext) {< / div >
< div class = "line" > < a name = "l00255" > < / a > < span class = "lineno" > 255< / span >   DCHECK(plaintext);< / div >
< div class = "line" > < a name = "l00256" > < / a > < span class = "lineno" > 256< / span >   DCHECK(ciphertext);< / div >
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< div class = "line" > < a name = "l00257" > < / a > < span class = "lineno" > 257< / span >   < / div >
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< div class = "line" > < a name = "l00258" > < / a > < span class = "lineno" > 258< / span >   < span class = "keywordflow" > if< / span > (size < AES_BLOCK_SIZE) {< / div >
< div class = "line" > < a name = "l00259" > < / a > < span class = "lineno" > 259< / span >   < span class = "comment" > // Don' t have a full block, leave unencrypted.< / span > < / div >
< div class = "line" > < a name = "l00260" > < / a > < span class = "lineno" > 260< / span >   memcpy(ciphertext, plaintext, size);< / div >
< div class = "line" > < a name = "l00261" > < / a > < span class = "lineno" > 261< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00262" > < / a > < span class = "lineno" > 262< / span >   }< / div >
< div class = "line" > < a name = "l00263" > < / a > < span class = "lineno" > 263< / span >   < / div >
< div class = "line" > < a name = "l00264" > < / a > < span class = "lineno" > 264< / span >   std::vector< uint8_t> iv(iv_);< / div >
< div class = "line" > < a name = "l00265" > < / a > < span class = "lineno" > 265< / span >   < span class = "keywordtype" > size_t< / span > residual_block_size = size % AES_BLOCK_SIZE;< / div >
< div class = "line" > < a name = "l00266" > < / a > < span class = "lineno" > 266< / span >   < span class = "keywordtype" > size_t< / span > cbc_size = size - residual_block_size;< / div >
< div class = "line" > < a name = "l00267" > < / a > < span class = "lineno" > 267< / span >   < / div >
< div class = "line" > < a name = "l00268" > < / a > < span class = "lineno" > 268< / span >   < span class = "comment" > // Encrypt everything but the residual block using CBC.< / span > < / div >
< div class = "line" > < a name = "l00269" > < / a > < span class = "lineno" > 269< / span >   AES_cbc_encrypt(plaintext,< / div >
< div class = "line" > < a name = "l00270" > < / a > < span class = "lineno" > 270< / span >   ciphertext,< / div >
< div class = "line" > < a name = "l00271" > < / a > < span class = "lineno" > 271< / span >   cbc_size,< / div >
< div class = "line" > < a name = "l00272" > < / a > < span class = "lineno" > 272< / span >   aes_key_.get(),< / div >
< div class = "line" > < a name = "l00273" > < / a > < span class = "lineno" > 273< / span >   & iv[0],< / div >
< div class = "line" > < a name = "l00274" > < / a > < span class = "lineno" > 274< / span >   AES_ENCRYPT);< / div >
< div class = "line" > < a name = "l00275" > < / a > < span class = "lineno" > 275< / span >   < span class = "keywordflow" > if< / span > (residual_block_size == 0) {< / div >
< div class = "line" > < a name = "l00276" > < / a > < span class = "lineno" > 276< / span >   < span class = "comment" > // No residual block. No need to do ciphertext stealing.< / span > < / div >
< div class = "line" > < a name = "l00277" > < / a > < span class = "lineno" > 277< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00278" > < / a > < span class = "lineno" > 278< / span >   }< / div >
< div class = "line" > < a name = "l00279" > < / a > < span class = "lineno" > 279< / span >   < / div >
< div class = "line" > < a name = "l00280" > < / a > < span class = "lineno" > 280< / span >   < span class = "comment" > // Zero-pad the residual block and encrypt using CBC.< / span > < / div >
< div class = "line" > < a name = "l00281" > < / a > < span class = "lineno" > 281< / span >   std::vector< uint8_t> residual_block(plaintext + size - residual_block_size,< / div >
< div class = "line" > < a name = "l00282" > < / a > < span class = "lineno" > 282< / span >   plaintext + size);< / div >
< div class = "line" > < a name = "l00283" > < / a > < span class = "lineno" > 283< / span >   residual_block.resize(AES_BLOCK_SIZE, 0);< / div >
< div class = "line" > < a name = "l00284" > < / a > < span class = "lineno" > 284< / span >   AES_cbc_encrypt(& residual_block[0],< / div >
< div class = "line" > < a name = "l00285" > < / a > < span class = "lineno" > 285< / span >   & residual_block[0],< / div >
< div class = "line" > < a name = "l00286" > < / a > < span class = "lineno" > 286< / span >   AES_BLOCK_SIZE,< / div >
< div class = "line" > < a name = "l00287" > < / a > < span class = "lineno" > 287< / span >   aes_key_.get(),< / div >
< div class = "line" > < a name = "l00288" > < / a > < span class = "lineno" > 288< / span >   & iv[0],< / div >
< div class = "line" > < a name = "l00289" > < / a > < span class = "lineno" > 289< / span >   AES_ENCRYPT);< / div >
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< div class = "line" > < a name = "l00290" > < / a > < span class = "lineno" > 290< / span >   < / div >
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< div class = "line" > < a name = "l00291" > < / a > < span class = "lineno" > 291< / span >   < span class = "comment" > // Replace the last full block with the zero-padded, encrypted residual block,< / span > < / div >
< div class = "line" > < a name = "l00292" > < / a > < span class = "lineno" > 292< / span >   < span class = "comment" > // and replace the residual block with the equivalent portion of the last full< / span > < / div >
< div class = "line" > < a name = "l00293" > < / a > < span class = "lineno" > 293< / span >   < span class = "comment" > // encrypted block. It may appear that some encrypted bits of the last full< / span > < / div >
< div class = "line" > < a name = "l00294" > < / a > < span class = "lineno" > 294< / span >   < span class = "comment" > // block are lost, but they are not, as they were used as the IV when< / span > < / div >
< div class = "line" > < a name = "l00295" > < / a > < span class = "lineno" > 295< / span >   < span class = "comment" > // encrypting the zero-padded residual block.< / span > < / div >
< div class = "line" > < a name = "l00296" > < / a > < span class = "lineno" > 296< / span >   uint8_t* residual_ciphertext_block = ciphertext + size - residual_block_size;< / div >
< div class = "line" > < a name = "l00297" > < / a > < span class = "lineno" > 297< / span >   memcpy(residual_ciphertext_block,< / div >
< div class = "line" > < a name = "l00298" > < / a > < span class = "lineno" > 298< / span >   residual_ciphertext_block - AES_BLOCK_SIZE,< / div >
< div class = "line" > < a name = "l00299" > < / a > < span class = "lineno" > 299< / span >   residual_block_size);< / div >
< div class = "line" > < a name = "l00300" > < / a > < span class = "lineno" > 300< / span >   memcpy(residual_ciphertext_block - AES_BLOCK_SIZE,< / div >
< div class = "line" > < a name = "l00301" > < / a > < span class = "lineno" > 301< / span >   residual_block.data(),< / div >
< div class = "line" > < a name = "l00302" > < / a > < span class = "lineno" > 302< / span >   AES_BLOCK_SIZE);< / div >
< div class = "line" > < a name = "l00303" > < / a > < span class = "lineno" > 303< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00304" > < / a > < span class = "lineno" > 304< / span >   }< / div >
< div class = "line" > < a name = "l00305" > < / a > < span class = "lineno" > 305< / span >   < / div >
< div class = "line" > < a name = "l00306" > < / a > < span class = "lineno" > < a class = "line" href = "../../d6/da2/classedash__packager_1_1media_1_1AesCbcCtsEncryptor.html#abd04cf7a533527022735eb79151db262" > 306< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "../../d6/da2/classedash__packager_1_1media_1_1AesCbcCtsEncryptor.html#abd04cf7a533527022735eb79151db262" > AesCbcCtsEncryptor::UpdateIv< / a > () {}< / div >
< div class = "line" > < a name = "l00307" > < / a > < span class = "lineno" > 307< / span >   < / div >
< div class = "line" > < a name = "l00308" > < / a > < span class = "lineno" > < a class = "line" href = "../../d6/da2/classedash__packager_1_1media_1_1AesCbcCtsEncryptor.html#ae6df0c4b5a1db50537f74deb36b96292" > 308< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../d6/da2/classedash__packager_1_1media_1_1AesCbcCtsEncryptor.html#ae6df0c4b5a1db50537f74deb36b96292" > AesCbcCtsEncryptor::SetIv< / a > (< span class = "keyword" > const< / span > std::vector< uint8_t> & iv) {< / div >
< div class = "line" > < a name = "l00309" > < / a > < span class = "lineno" > 309< / span >   < span class = "keywordflow" > if< / span > (iv.size() != AES_BLOCK_SIZE) {< / div >
< div class = "line" > < a name = "l00310" > < / a > < span class = "lineno" > 310< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Invalid IV size: " < / span > < < iv.size();< / div >
< div class = "line" > < a name = "l00311" > < / a > < span class = "lineno" > 311< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00312" > < / a > < span class = "lineno" > 312< / span >   }< / div >
< div class = "line" > < a name = "l00313" > < / a > < span class = "lineno" > 313< / span >   < / div >
< div class = "line" > < a name = "l00314" > < / a > < span class = "lineno" > 314< / span >   iv_ = iv;< / div >
< div class = "line" > < a name = "l00315" > < / a > < span class = "lineno" > 315< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00316" > < / a > < span class = "lineno" > 316< / span >   }< / div >
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< div class = "line" > < a name = "l00317" > < / a > < span class = "lineno" > 317< / span >   < / div >
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< div class = "line" > < a name = "l00318" > < / a > < span class = "lineno" > 318< / span >   } < span class = "comment" > // namespace media< / span > < / div >
< div class = "line" > < a name = "l00319" > < / a > < span class = "lineno" > 319< / span >   } < span class = "comment" > // namespace edash_packager< / span > < / div >
< div class = "ttc" id = "classedash__packager_1_1media_1_1AesEncryptor_html_a6c225492907f281a7c08a76e012f8ba7" > < div class = "ttname" > < a href = "../../dc/d92/classedash__packager_1_1media_1_1AesEncryptor.html#a6c225492907f281a7c08a76e012f8ba7" > edash_packager::media::AesEncryptor::InitializeWithIv< / a > < / div > < div class = "ttdeci" > virtual bool InitializeWithIv(const std::vector< uint8_t > & key, const std::vector< uint8_t > & iv)=0< / div > < / div >
< div class = "ttc" id = "classedash__packager_1_1media_1_1AesCtrEncryptor_html_a2fa3278643f5d2ef4083a04ad44933f3" > < div class = "ttname" > < a href = "../../dd/d79/classedash__packager_1_1media_1_1AesCtrEncryptor.html#a2fa3278643f5d2ef4083a04ad44933f3" > edash_packager::media::AesCtrEncryptor::InitializeWithIv< / a > < / div > < div class = "ttdeci" > bool InitializeWithIv(const std::vector< uint8_t > & key, const std::vector< uint8_t > & iv) override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/da4/aes__encryptor_8cc_source.html#l00084" > aes_encryptor.cc:84< / a > < / div > < / div >
< div class = "ttc" id = "classedash__packager_1_1media_1_1AesCtrEncryptor_html_a27cc6076b6f5edd8c096753ae157a1db" > < div class = "ttname" > < a href = "../../dd/d79/classedash__packager_1_1media_1_1AesCtrEncryptor.html#a27cc6076b6f5edd8c096753ae157a1db" > edash_packager::media::AesCtrEncryptor::UpdateIv< / a > < / div > < div class = "ttdeci" > void UpdateIv() override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/da4/aes__encryptor_8cc_source.html#l00128" > aes_encryptor.cc:128< / a > < / div > < / div >
< div class = "ttc" id = "classedash__packager_1_1media_1_1AesCbcPkcs5Encryptor_html_acff7cfca3a800344952a86e13dfad896" > < div class = "ttname" > < a href = "../../d6/dc4/classedash__packager_1_1media_1_1AesCbcPkcs5Encryptor.html#acff7cfca3a800344952a86e13dfad896" > edash_packager::media::AesCbcPkcs5Encryptor::InitializeWithIv< / a > < / div > < div class = "ttdeci" > bool InitializeWithIv(const std::vector< uint8_t > & key, const std::vector< uint8_t > & iv) override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/da4/aes__encryptor_8cc_source.html#l00172" > aes_encryptor.cc:172< / a > < / div > < / div >
< div class = "ttc" id = "classedash__packager_1_1media_1_1AesCtrEncryptor_html_ac70e6553917ad948fb2c18101de0f8d9" > < div class = "ttname" > < a href = "../../dd/d79/classedash__packager_1_1media_1_1AesCtrEncryptor.html#ac70e6553917ad948fb2c18101de0f8d9" > edash_packager::media::AesCtrEncryptor::SetIv< / a > < / div > < div class = "ttdeci" > bool SetIv(const std::vector< uint8_t > & iv) override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/da4/aes__encryptor_8cc_source.html#l00157" > aes_encryptor.cc:157< / a > < / div > < / div >
< div class = "ttc" id = "classedash__packager_1_1media_1_1AesCbcCtsEncryptor_html_ae6df0c4b5a1db50537f74deb36b96292" > < div class = "ttname" > < a href = "../../d6/da2/classedash__packager_1_1media_1_1AesCbcCtsEncryptor.html#ae6df0c4b5a1db50537f74deb36b96292" > edash_packager::media::AesCbcCtsEncryptor::SetIv< / a > < / div > < div class = "ttdeci" > bool SetIv(const std::vector< uint8_t > & iv) override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/da4/aes__encryptor_8cc_source.html#l00308" > aes_encryptor.cc:308< / a > < / div > < / div >
< div class = "ttc" id = "classedash__packager_1_1media_1_1AesCbcPkcs5Encryptor_html_ad21bb8d1ea5aa49645c9b3476f6bcc8a" > < div class = "ttname" > < a href = "../../d6/dc4/classedash__packager_1_1media_1_1AesCbcPkcs5Encryptor.html#ad21bb8d1ea5aa49645c9b3476f6bcc8a" > edash_packager::media::AesCbcPkcs5Encryptor::SetIv< / a > < / div > < div class = "ttdeci" > bool SetIv(const std::vector< uint8_t > & iv) override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/da4/aes__encryptor_8cc_source.html#l00217" > aes_encryptor.cc:217< / a > < / div > < / div >
< div class = "ttc" id = "classedash__packager_1_1media_1_1AesCbcPkcs5Encryptor_html_aab27a1d7244f1dcdd7aa75b0fc1be995" > < div class = "ttname" > < a href = "../../d6/dc4/classedash__packager_1_1media_1_1AesCbcPkcs5Encryptor.html#aab27a1d7244f1dcdd7aa75b0fc1be995" > edash_packager::media::AesCbcPkcs5Encryptor::UpdateIv< / a > < / div > < div class = "ttdeci" > void UpdateIv() override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/da4/aes__encryptor_8cc_source.html#l00215" > aes_encryptor.cc:215< / a > < / div > < / div >
< div class = "ttc" id = "classedash__packager_1_1media_1_1AesEncryptor_html_a49631d3d3d834bf7d78e0d51d7b33651" > < div class = "ttname" > < a href = "../../dc/d92/classedash__packager_1_1media_1_1AesEncryptor.html#a49631d3d3d834bf7d78e0d51d7b33651" > edash_packager::media::AesEncryptor::InitializeWithRandomIv< / a > < / div > < div class = "ttdeci" > virtual bool InitializeWithRandomIv(const std::vector< uint8_t > & key, uint8_t iv_size)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/da4/aes__encryptor_8cc_source.html#l00046" > aes_encryptor.cc:46< / a > < / div > < / div >
< div class = "ttc" id = "classedash__packager_1_1media_1_1AesCbcCtsEncryptor_html_abd04cf7a533527022735eb79151db262" > < div class = "ttname" > < a href = "../../d6/da2/classedash__packager_1_1media_1_1AesCbcCtsEncryptor.html#abd04cf7a533527022735eb79151db262" > edash_packager::media::AesCbcCtsEncryptor::UpdateIv< / a > < / div > < div class = "ttdeci" > void UpdateIv() override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/da4/aes__encryptor_8cc_source.html#l00306" > aes_encryptor.cc:306< / a > < / div > < / div >
< div class = "ttc" id = "classedash__packager_1_1media_1_1AesCbcCtsEncryptor_html_ad9f134c35f24ebf4c1877ad76f8622b7" > < div class = "ttname" > < a href = "../../d6/da2/classedash__packager_1_1media_1_1AesCbcCtsEncryptor.html#ad9f134c35f24ebf4c1877ad76f8622b7" > edash_packager::media::AesCbcCtsEncryptor::InitializeWithIv< / a > < / div > < div class = "ttdeci" > bool InitializeWithIv(const std::vector< uint8_t > & key, const std::vector< uint8_t > & iv) override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/da4/aes__encryptor_8cc_source.html#l00230" > aes_encryptor.cc:230< / a > < / div > < / div >
2015-10-16 00:33:37 +00:00
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