2016-04-12 00:33:21 +00:00
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
< html xmlns = "http://www.w3.org/1999/xhtml" >
< head >
< meta http-equiv = "Content-Type" content = "text/xhtml;charset=UTF-8" / >
< meta http-equiv = "X-UA-Compatible" content = "IE=9" / >
< meta name = "generator" content = "Doxygen 1.8.6" / >
< title > DASH Media Packaging SDK: media/base/aes_cryptor.cc Source File< / title >
< link href = "../../tabs.css" rel = "stylesheet" type = "text/css" / >
< script type = "text/javascript" src = "../../jquery.js" > < / script >
< script type = "text/javascript" src = "../../dynsections.js" > < / script >
< link href = "../../search/search.css" rel = "stylesheet" type = "text/css" / >
< script type = "text/javascript" src = "../../search/search.js" > < / script >
< script type = "text/javascript" >
$(document).ready(function() { searchBox.OnSelectItem(0); });
< / script >
< link href = "../../doxygen.css" rel = "stylesheet" type = "text/css" / >
< / head >
< body >
< div id = "top" > <!-- do not remove this div, it is closed by doxygen! -->
< div id = "titlearea" >
< table cellspacing = "0" cellpadding = "0" >
< tbody >
< tr style = "height: 56px;" >
< td style = "padding-left: 0.5em;" >
< div id = "projectname" > DASH Media Packaging SDK
< / div >
< / td >
< / tr >
< / tbody >
< / table >
< / div >
<!-- end header part -->
<!-- Generated by Doxygen 1.8.6 -->
< script type = "text/javascript" >
var searchBox = new SearchBox("searchBox", "../../search",false,'Search');
< / script >
< div id = "navrow1" class = "tabs" >
< ul class = "tablist" >
< li > < a href = "../../index.html" > < span > Main  Page< / span > < / a > < / li >
< li > < a href = "../../namespaces.html" > < span > Namespaces< / span > < / a > < / li >
< li > < a href = "../../annotated.html" > < span > Classes< / span > < / a > < / li >
< li class = "current" > < a href = "../../files.html" > < span > Files< / span > < / a > < / li >
< li >
< div id = "MSearchBox" class = "MSearchBoxInactive" >
< span class = "left" >
< img id = "MSearchSelect" src = "../../search/mag_sel.png"
onmouseover="return searchBox.OnSearchSelectShow()"
onmouseout="return searchBox.OnSearchSelectHide()"
alt=""/>
< input type = "text" id = "MSearchField" value = "Search" accesskey = "S"
onfocus="searchBox.OnSearchFieldFocus(true)"
onblur="searchBox.OnSearchFieldFocus(false)"
onkeyup="searchBox.OnSearchFieldChange(event)"/>
< / span > < span class = "right" >
< a id = "MSearchClose" href = "javascript:searchBox.CloseResultsWindow()" > < img id = "MSearchCloseImg" border = "0" src = "../../search/close.png" alt = "" / > < / a >
< / span >
< / div >
< / li >
< / ul >
< / div >
< div id = "navrow2" class = "tabs2" >
< ul class = "tablist" >
< li > < a href = "../../files.html" > < span > File  List< / span > < / a > < / li >
< / ul >
< / div >
<!-- window showing the filter options -->
< div id = "MSearchSelectWindow"
onmouseover="return searchBox.OnSearchSelectShow()"
onmouseout="return searchBox.OnSearchSelectHide()"
onkeydown="return searchBox.OnSearchSelectKey(event)">
2016-05-11 18:03:07 +00:00
< a class = "SelectItem" href = "javascript:void(0)" onclick = "searchBox.OnSelectItem(0)" > < span class = "SelectionMark" >   < / span > All< / a > < a class = "SelectItem" href = "javascript:void(0)" onclick = "searchBox.OnSelectItem(1)" > < span class = "SelectionMark" >   < / span > Classes< / a > < a class = "SelectItem" href = "javascript:void(0)" onclick = "searchBox.OnSelectItem(2)" > < span class = "SelectionMark" >   < / span > Namespaces< / a > < a class = "SelectItem" href = "javascript:void(0)" onclick = "searchBox.OnSelectItem(3)" > < span class = "SelectionMark" >   < / span > Functions< / a > < a class = "SelectItem" href = "javascript:void(0)" onclick = "searchBox.OnSelectItem(4)" > < span class = "SelectionMark" >   < / span > Variables< / a > < a class = "SelectItem" href = "javascript:void(0)" onclick = "searchBox.OnSelectItem(5)" > < span class = "SelectionMark" >   < / span > Typedefs< / a > < a class = "SelectItem" href = "javascript:void(0)" onclick = "searchBox.OnSelectItem(6)" > < span class = "SelectionMark" >   < / span > Enumerations< / a > < a class = "SelectItem" href = "javascript:void(0)" onclick = "searchBox.OnSelectItem(7)" > < span class = "SelectionMark" >   < / span > Enumerator< / a > < / div >
2016-04-12 00:33:21 +00:00
<!-- iframe showing the search results (closed by default) -->
< div id = "MSearchResultsWindow" >
< iframe src = "javascript:void(0)" frameborder = "0"
name="MSearchResults" id="MSearchResults">
< / iframe >
< / div >
< div id = "nav-path" class = "navpath" >
< ul >
< 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 >
< / div >
< / div > <!-- top -->
< div class = "header" >
< div class = "headertitle" >
< div class = "title" > aes_cryptor.cc< / div > < / div >
< / div > <!-- header -->
< div class = "contents" >
< div class = "fragment" > < div class = "line" > < a name = "l00001" > < / a > < span class = "lineno" > 1< / span >   < span class = "comment" > // Copyright 2016 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_cryptor.h" < / span > < / div >
< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < / div >
2016-09-01 17:53:10 +00:00
< 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 < string> < / span > < / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < span class = "preprocessor" > #include < vector> < / span > < / div >
2016-04-12 23:13:12 +00:00
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < / div >
2016-04-20 21:57:59 +00:00
< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   < span class = "preprocessor" > #include " packager/base/logging.h" < / span > < / div >
2016-09-01 17:53:10 +00:00
< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   < / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < span class = "keyword" > namespace < / span > {< / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   < / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < span class = "comment" > // According to ISO/IEC 23001-7:2016 CENC spec, IV should be either< / span > < / div >
< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   < span class = "comment" > // 64-bit (8-byte) or 128-bit (16-byte).< / span > < / div >
< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   < span class = "keywordtype" > bool< / span > IsIvSizeValid(< span class = "keywordtype" > size_t< / span > iv_size) {< / div >
< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   < span class = "keywordflow" > return< / span > iv_size == 8 || iv_size == 16;< / 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" > // namespace< / span > < / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   < / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   < span class = "keyword" > namespace < / span > shaka {< / div >
< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   < span class = "keyword" > namespace < / span > media {< / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   < / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > < a class = "line" href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a47fbdacc296fbddd899c47ec0c17e5e8" > 31< / a > < / span >   < a class = "code" href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a47fbdacc296fbddd899c47ec0c17e5e8" > AesCryptor::AesCryptor< / a > (ConstantIvFlag constant_iv_flag)< / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   : aes_key_(new AES_KEY),< / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   constant_iv_flag_(constant_iv_flag),< / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   num_crypt_bytes_(0) {}< / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   < / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   AesCryptor::~AesCryptor() {}< / 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 = "keywordtype" > bool< / span > AesCryptor::Crypt(< span class = "keyword" > const< / span > std::vector< uint8_t> & text,< / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   std::vector< uint8_t> * crypt_text) {< / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   < span class = "comment" > // Save text size to make it work for in-place conversion, since the< / span > < / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   < span class = "comment" > // next statement will update the text size.< / span > < / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > text_size = text.size();< / div >
< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   crypt_text-> resize(text_size + NumPaddingBytes(text_size));< / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   < span class = "keywordtype" > size_t< / span > crypt_text_size = crypt_text-> size();< / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   < span class = "keywordflow" > if< / span > (!Crypt(text.data(), text_size, crypt_text-> data(), & crypt_text_size)) {< / div >
< div class = "line" > < a name = "l00046" > < / a > < span class = "lineno" > 46< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00047" > < / a > < span class = "lineno" > 47< / span >   }< / div >
< div class = "line" > < a name = "l00048" > < / a > < span class = "lineno" > 48< / span >   DCHECK_LE(crypt_text_size, crypt_text-> size());< / div >
< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   crypt_text-> resize(crypt_text_size);< / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   }< / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   < / div >
< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   < span class = "keywordtype" > bool< / span > AesCryptor::Crypt(< span class = "keyword" > const< / span > std::string& text, std::string* crypt_text) {< / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   < span class = "comment" > // Save text size to make it work for in-place conversion, since the< / span > < / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   < span class = "comment" > // next statement will update the text size.< / span > < / div >
< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > text_size = text.size();< / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   crypt_text-> resize(text_size + NumPaddingBytes(text_size));< / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   < span class = "keywordtype" > size_t< / span > crypt_text_size = crypt_text-> size();< / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   < span class = "keywordflow" > if< / span > (!Crypt(reinterpret_cast< const uint8_t*> (text.data()), text_size,< / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   reinterpret_cast< uint8_t*> (& (*crypt_text)[0]), & crypt_text_size))< / div >
< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > 61< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   DCHECK_LE(crypt_text_size, crypt_text-> size());< / div >
< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   crypt_text-> resize(crypt_text_size);< / div >
< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / 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 >   < / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > < a class = "line" href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a4875146da4761bb757d6b00132ae6fea" > 67< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a4875146da4761bb757d6b00132ae6fea" > AesCryptor::SetIv< / a > (< span class = "keyword" > const< / span > std::vector< uint8_t> & iv) {< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   < span class = "keywordflow" > if< / span > (!IsIvSizeValid(iv.size())) {< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Invalid IV size: " < / span > < < iv.size();< / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > 70< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   }< / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   iv_ = < a class = "code" href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a96dde16f12a82a563c77f6d5522571f3" > iv< / a > ;< / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   num_crypt_bytes_ = 0;< / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   SetIvInternal();< / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   }< / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   < / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > < a class = "line" href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a812dfc641212f8eb877ab153de7fbb37" > 78< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a812dfc641212f8eb877ab153de7fbb37" > AesCryptor::UpdateIv< / a > () {< / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   < span class = "keywordflow" > if< / span > (constant_iv_flag_ == kUseConstantIv)< / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   < span class = "keywordflow" > return< / 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 >   uint64_t increment = 0;< / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   < span class = "comment" > // As recommended in ISO/IEC 23001-7:2016 CENC spec, for 64-bit (8-byte)< / span > < / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > 84< / span >   < span class = "comment" > // IV_Sizes, initialization vectors for subsequent samples can be created by< / span > < / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   < span class = "comment" > // incrementing the initialization vector of the previous sample.< / span > < / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   < span class = "comment" > // For 128-bit (16-byte) IV_Sizes, initialization vectors for subsequent< / span > < / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   < span class = "comment" > // samples should be created by adding the block count of the previous sample< / span > < / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   < span class = "comment" > // to the initialization vector of the previous sample.< / span > < / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   < span class = "comment" > // There is no official recommendation of how IV for next sample should be< / span > < / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   < span class = "comment" > // generated for CBC mode. We use the same generation algorithm as CTR here.< / span > < / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   < span class = "keywordflow" > if< / span > (iv_.size() == 8) {< / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   increment = 1;< / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   DCHECK_EQ(16u, iv_.size());< / div >
< div class = "line" > < a name = "l00095" > < / a > < span class = "lineno" > 95< / span >   increment = (num_crypt_bytes_ + AES_BLOCK_SIZE - 1) / AES_BLOCK_SIZE;< / div >
< div class = "line" > < a name = "l00096" > < / a > < span class = "lineno" > 96< / span >   }< / div >
< div class = "line" > < a name = "l00097" > < / a > < span class = "lineno" > 97< / span >   < / div >
< div class = "line" > < a name = "l00098" > < / a > < span class = "lineno" > 98< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = iv_.size() - 1; increment > 0 & & i > = 0; --i) {< / div >
< div class = "line" > < a name = "l00099" > < / a > < span class = "lineno" > 99< / span >   increment += iv_[i];< / div >
< div class = "line" > < a name = "l00100" > < / a > < span class = "lineno" > 100< / span >   iv_[i] = increment & 0xFF;< / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   increment > > = 8;< / div >
< 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 >   num_crypt_bytes_ = 0;< / div >
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   SetIvInternal();< / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   }< / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   < / div >
< div class = "line" > < a name = "l00107" > < / a > < span class = "lineno" > < a class = "line" href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a40d9a82d274d6fbaee5346328f11dedd" > 107< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a40d9a82d274d6fbaee5346328f11dedd" > AesCryptor::GenerateRandomIv< / a > (FourCC protection_scheme,< / div >
< div class = "line" > < a name = "l00108" > < / a > < span class = "lineno" > 108< / span >   std::vector< uint8_t> * iv) {< / div >
< div class = "line" > < a name = "l00109" > < / a > < span class = "lineno" > 109< / span >   < span class = "comment" > // ISO/IEC 23001-7:2016 10.1 and 10.3 For ' cenc' and ' cens' < / span > < / div >
< div class = "line" > < a name = "l00110" > < / a > < span class = "lineno" > 110< / span >   < span class = "comment" > // default_Per_Sample_IV_Size and Per_Sample_IV_Size SHOULD be 8-bytes.< / span > < / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   < span class = "comment" > // There is no official guideline on the iv size for ' cbc1' and ' cbcs' ,< / span > < / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   < span class = "comment" > // but 16-byte provides better security.< / span > < / div >
< div class = "line" > < a name = "l00113" > < / a > < span class = "lineno" > 113< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > iv_size =< / div >
< div class = "line" > < a name = "l00114" > < / a > < span class = "lineno" > 114< / span >   (protection_scheme == FOURCC_cenc || protection_scheme == FOURCC_cens)< / div >
< div class = "line" > < a name = "l00115" > < / a > < span class = "lineno" > 115< / span >   ? 8< / div >
< div class = "line" > < a name = "l00116" > < / a > < span class = "lineno" > 116< / span >   : 16;< / div >
< div class = "line" > < a name = "l00117" > < / a > < span class = "lineno" > 117< / span >   iv-> resize(iv_size);< / div >
< div class = "line" > < a name = "l00118" > < / a > < span class = "lineno" > 118< / span >   < span class = "keywordflow" > if< / span > (RAND_bytes(iv-> data(), iv_size) != 1) {< / div >
< div class = "line" > < a name = "l00119" > < / a > < span class = "lineno" > 119< / span >   LOG(ERROR) < < < span class = "stringliteral" > " RAND_bytes failed with error: " < / span > < / div >
< div class = "line" > < a name = "l00120" > < / a > < span class = "lineno" > 120< / span >   < < ERR_error_string(ERR_get_error(), NULL);< / div >
< div class = "line" > < a name = "l00121" > < / a > < span class = "lineno" > 121< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00122" > < / a > < span class = "lineno" > 122< / span >   }< / div >
< div class = "line" > < a name = "l00123" > < / a > < span class = "lineno" > 123< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / 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 >   < / div >
< div class = "line" > < a name = "l00126" > < / a > < span class = "lineno" > 126< / span >   < span class = "keywordtype" > size_t< / span > AesCryptor::NumPaddingBytes(< span class = "keywordtype" > size_t< / span > size)< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l00127" > < / a > < span class = "lineno" > 127< / span >   < span class = "comment" > // No padding by default.< / span > < / div >
< div class = "line" > < a name = "l00128" > < / a > < span class = "lineno" > 128< / span >   < span class = "keywordflow" > return< / span > 0;< / div >
< div class = "line" > < a name = "l00129" > < / a > < span class = "lineno" > 129< / span >   }< / 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" > // namespace media< / span > < / div >
< div class = "line" > < a name = "l00132" > < / a > < span class = "lineno" > 132< / span >   } < span class = "comment" > // namespace shaka< / span > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1AesCryptor_html_a812dfc641212f8eb877ab153de7fbb37" > < div class = "ttname" > < a href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a812dfc641212f8eb877ab153de7fbb37" > shaka::media::AesCryptor::UpdateIv< / a > < / div > < div class = "ttdeci" > void UpdateIv()< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d6/d55/aes__cryptor_8cc_source.html#l00078" > aes_cryptor.cc:78< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1AesCryptor_html_a47fbdacc296fbddd899c47ec0c17e5e8" > < div class = "ttname" > < a href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a47fbdacc296fbddd899c47ec0c17e5e8" > shaka::media::AesCryptor::AesCryptor< / a > < / div > < div class = "ttdeci" > AesCryptor(ConstantIvFlag constant_iv_flag)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d6/d55/aes__cryptor_8cc_source.html#l00031" > aes_cryptor.cc:31< / a > < / div > < / div >
2016-05-24 23:43:16 +00:00
< div class = "ttc" id = "classshaka_1_1media_1_1AesCryptor_html_a96dde16f12a82a563c77f6d5522571f3" > < div class = "ttname" > < a href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a96dde16f12a82a563c77f6d5522571f3" > shaka::media::AesCryptor::iv< / a > < / div > < div class = "ttdeci" > const std::vector< uint8_t > & iv() const < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d0/d42/aes__cryptor_8h_source.html#l00081" > aes_cryptor.h:81< / a > < / div > < / div >
2016-09-01 17:53:10 +00:00
< div class = "ttc" id = "classshaka_1_1media_1_1AesCryptor_html_a40d9a82d274d6fbaee5346328f11dedd" > < div class = "ttname" > < a href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a40d9a82d274d6fbaee5346328f11dedd" > shaka::media::AesCryptor::GenerateRandomIv< / a > < / div > < div class = "ttdeci" > static bool GenerateRandomIv(FourCC protection_scheme, std::vector< uint8_t > *iv)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d6/d55/aes__cryptor_8cc_source.html#l00107" > aes_cryptor.cc:107< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1AesCryptor_html_a4875146da4761bb757d6b00132ae6fea" > < div class = "ttname" > < a href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a4875146da4761bb757d6b00132ae6fea" > shaka::media::AesCryptor::SetIv< / a > < / div > < div class = "ttdeci" > bool SetIv(const std::vector< uint8_t > & iv)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d6/d55/aes__cryptor_8cc_source.html#l00067" > aes_cryptor.cc:67< / a > < / div > < / div >
2016-04-12 00:33:21 +00:00
< / div > <!-- fragment --> < / div > <!-- contents -->
<!-- start footer part -->
< hr class = "footer" / > < address class = "footer" > < small >
2016-12-14 19:38:53 +00:00
Generated on Wed Dec 14 2016 19:38:46 for DASH Media Packaging SDK by   < a href = "http://www.doxygen.org/index.html" >
2016-04-12 00:33:21 +00:00
< img class = "footer" src = "../../doxygen.png" alt = "doxygen" / >
< / a > 1.8.6
< / small > < / address >
< / body >
< / html >
