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<li class="navelem"><a class="el" href="../../dir_3f8eec2fc361645de4b1ec14c19fffc7.html">packager</a></li><li class="navelem"><a class="el" href="../../dir_bf7f1d16febc509cca62cff27fb88644.html">app</a></li> </ul>
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<div class="title">crypto_flags.cc</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2017 Google Inc. All rights reserved.</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">//</span></div>
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<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>
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<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>
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<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>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>  </div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include "packager/app/crypto_flags.h"</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  </div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include <stdio.h></span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>  </div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> DEFINE_string(protection_scheme,</div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  <span class="stringliteral">"cenc"</span>,</div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  <span class="stringliteral">"Specify a protection scheme, 'cenc' or 'cbc1' or pattern-based "</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  <span class="stringliteral">"protection schemes 'cens' or 'cbcs'."</span>);</div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> DEFINE_int32(</div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  crypt_byte_block,</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  1,</div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  <span class="stringliteral">"Specify the count of the encrypted blocks in the protection pattern, "</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  <span class="stringliteral">"where block is of size 16-bytes. There are three common "</span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <span class="stringliteral">"patterns (crypt_byte_block:skip_byte_block): 1:9 (default), 5:5, 10:0. "</span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="stringliteral">"Apply to video streams with 'cbcs' and 'cens' protection schemes only; "</span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="stringliteral">"ignored otherwise."</span>);</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> DEFINE_int32(</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  skip_byte_block,</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  9,</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="stringliteral">"Specify the count of the unencrypted blocks in the protection pattern. "</span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="stringliteral">"Apply to video streams with 'cbcs' and 'cens' protection schemes only; "</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="stringliteral">"ignored otherwise."</span>);</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> DEFINE_bool(vp9_subsample_encryption, <span class="keyword">true</span>, <span class="stringliteral">"Enable VP9 subsample encryption."</span>);</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> DEFINE_string(playready_extra_header_data,</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="stringliteral">""</span>,</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="stringliteral">"Extra XML data to add to PlayReady headers."</span>);</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  </div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keywordtype">bool</span> ValueNotGreaterThanTen(<span class="keyword">const</span> <span class="keywordtype">char</span>* flagname, int32_t value) {</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keywordflow">if</span> (value > 10) {</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  fprintf(stderr, <span class="stringliteral">"ERROR: %s must not be greater than 10.\n"</span>, flagname);</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  }</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordflow">if</span> (value < 0) {</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  fprintf(stderr, <span class="stringliteral">"ERROR: %s must be non-negative.\n"</span>, flagname);</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<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>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> }</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  </div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="keywordtype">bool</span> ValueIsXml(<span class="keyword">const</span> <span class="keywordtype">char</span>* flagname, <span class="keyword">const</span> std::string& value) {</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordflow">if</span> (value.empty())</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  </div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">if</span> (value[0] != <span class="charliteral">'<'</span> || value[value.size() - 1] != <span class="charliteral">'>'</span>) {</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  fprintf(stderr, <span class="stringliteral">"ERROR: %s must be valid XML.\n"</span>, flagname);</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  }</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> }</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  </div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> DEFINE_validator(crypt_byte_block, &ValueNotGreaterThanTen);</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> DEFINE_validator(skip_byte_block, &ValueNotGreaterThanTen);</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> DEFINE_validator(playready_extra_header_data, &ValueIsXml);</div>
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