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<h1>Source code for M2Crypto.RSA</h1><div class="highlight"><pre>
<span></span><span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">absolute_import</span>
<span class="sd">"""M2Crypto wrapper for OpenSSL RSA API.</span>
<span class="sd">Copyright (c) 1999-2004 Ng Pheng Siong. All rights reserved."""</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="kn">from</span> <span class="nn">M2Crypto</span> <span class="kn">import</span> <span class="n">BIO</span><span class="p">,</span> <span class="n">Err</span><span class="p">,</span> <span class="n">m2</span><span class="p">,</span> <span class="n">util</span>
<span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">Any</span><span class="p">,</span> <span class="n">AnyStr</span><span class="p">,</span> <span class="n">Callable</span><span class="p">,</span> <span class="n">IO</span><span class="p">,</span> <span class="n">Optional</span><span class="p">,</span> <span class="n">Tuple</span> <span class="c1"># noqa</span>
<div class="viewcode-block" id="RSAError"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSAError">[docs]</a><span class="k">class</span> <span class="nc">RSAError</span><span class="p">(</span><span class="ne">Exception</span><span class="p">):</span>
<span class="k">pass</span></div>
<span class="n">m2</span><span class="o">.</span><span class="n">rsa_init</span><span class="p">(</span><span class="n">RSAError</span><span class="p">)</span>
<span class="n">no_padding</span> <span class="o">=</span> <span class="n">m2</span><span class="o">.</span><span class="n">no_padding</span>
<span class="n">pkcs1_padding</span> <span class="o">=</span> <span class="n">m2</span><span class="o">.</span><span class="n">pkcs1_padding</span>
<span class="n">sslv23_padding</span> <span class="o">=</span> <span class="n">m2</span><span class="o">.</span><span class="n">sslv23_padding</span>
<span class="n">pkcs1_oaep_padding</span> <span class="o">=</span> <span class="n">m2</span><span class="o">.</span><span class="n">pkcs1_oaep_padding</span>
<div class="viewcode-block" id="RSA"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA">[docs]</a><span class="k">class</span> <span class="nc">RSA</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> RSA Key Pair.</span>
<span class="sd"> """</span>
<span class="n">m2_rsa_free</span> <span class="o">=</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_free</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">rsa</span><span class="p">,</span> <span class="n">_pyfree</span><span class="o">=</span><span class="mi">0</span><span class="p">):</span>
<span class="c1"># type: (bytes, int) -> None</span>
<span class="sd">"""</span>
<span class="sd"> :param rsa: binary representation of OpenSSL RSA type</span>
<span class="sd"> """</span>
<span class="k">assert</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_type_check</span><span class="p">(</span><span class="n">rsa</span><span class="p">),</span> <span class="s2">"'rsa' type error"</span>
<span class="bp">self</span><span class="o">.</span><span class="n">rsa</span> <span class="o">=</span> <span class="n">rsa</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_pyfree</span> <span class="o">=</span> <span class="n">_pyfree</span>
<span class="k">def</span> <span class="fm">__del__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># type: () -> None</span>
<span class="k">if</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="s1">'_pyfree'</span><span class="p">,</span> <span class="mi">0</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">m2_rsa_free</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">)</span>
<span class="k">def</span> <span class="fm">__len__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># type: () -> int</span>
<span class="k">return</span> <span class="nb">int</span><span class="p">(</span><span class="n">m2</span><span class="o">.</span><span class="n">rsa_size</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">)</span> <span class="o"><<</span> <span class="mi">3</span><span class="p">)</span>
<span class="k">def</span> <span class="fm">__getattr__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span>
<span class="c1"># type: (str) -> bytes</span>
<span class="k">if</span> <span class="n">name</span> <span class="o">==</span> <span class="s1">'e'</span><span class="p">:</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_get_e</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">)</span>
<span class="k">elif</span> <span class="n">name</span> <span class="o">==</span> <span class="s1">'n'</span><span class="p">:</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_get_n</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">AttributeError</span>
<div class="viewcode-block" id="RSA.pub"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.pub">[docs]</a> <span class="k">def</span> <span class="nf">pub</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># type: () -> Tuple[bytes, bytes]</span>
<span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">check_key</span><span class="p">(),</span> <span class="s1">'key is not initialised'</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_get_e</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">),</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_get_n</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">)</span></div>
<div class="viewcode-block" id="RSA.public_encrypt"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.public_encrypt">[docs]</a> <span class="k">def</span> <span class="nf">public_encrypt</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">padding</span><span class="p">):</span>
<span class="c1"># type: (bytes, int) -> bytes</span>
<span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">check_key</span><span class="p">(),</span> <span class="s1">'key is not initialised'</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_public_encrypt</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">padding</span><span class="p">)</span></div>
<div class="viewcode-block" id="RSA.public_decrypt"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.public_decrypt">[docs]</a> <span class="k">def</span> <span class="nf">public_decrypt</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">padding</span><span class="p">):</span>
<span class="c1"># type: (bytes, int) -> bytes</span>
<span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">check_key</span><span class="p">(),</span> <span class="s1">'key is not initialised'</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_public_decrypt</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">padding</span><span class="p">)</span></div>
<div class="viewcode-block" id="RSA.private_encrypt"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.private_encrypt">[docs]</a> <span class="k">def</span> <span class="nf">private_encrypt</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">padding</span><span class="p">):</span>
<span class="c1"># type: (bytes, int) -> bytes</span>
<span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">check_key</span><span class="p">(),</span> <span class="s1">'key is not initialised'</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_private_encrypt</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">padding</span><span class="p">)</span></div>
<div class="viewcode-block" id="RSA.private_decrypt"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.private_decrypt">[docs]</a> <span class="k">def</span> <span class="nf">private_decrypt</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">padding</span><span class="p">):</span>
<span class="c1"># type: (bytes, int) -> bytes</span>
<span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">check_key</span><span class="p">(),</span> <span class="s1">'key is not initialised'</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_private_decrypt</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">padding</span><span class="p">)</span></div>
<div class="viewcode-block" id="RSA.save_key_bio"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.save_key_bio">[docs]</a> <span class="k">def</span> <span class="nf">save_key_bio</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bio</span><span class="p">,</span> <span class="n">cipher</span><span class="o">=</span><span class="s1">'aes_128_cbc'</span><span class="p">,</span>
<span class="n">callback</span><span class="o">=</span><span class="n">util</span><span class="o">.</span><span class="n">passphrase_callback</span><span class="p">):</span>
<span class="c1"># type: (BIO.BIO, Optional[str], Callable) -> int</span>
<span class="sd">"""</span>
<span class="sd"> Save the key pair to an M2Crypto.BIO.BIO object in PEM format.</span>
<span class="sd"> :param bio: M2Crypto.BIO.BIO object to save key to.</span>
<span class="sd"> :param cipher: Symmetric cipher to protect the key. The default</span>
<span class="sd"> cipher is 'aes_128_cbc'. If cipher is None, then</span>
<span class="sd"> the key is saved in the clear.</span>
<span class="sd"> :param callback: A Python callable object that is invoked</span>
<span class="sd"> to acquire a passphrase with which to protect</span>
<span class="sd"> the key. The default is</span>
<span class="sd"> util.passphrase_callback.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">cipher</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_write_key_no_cipher</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">,</span> <span class="n">bio</span><span class="o">.</span><span class="n">_ptr</span><span class="p">(),</span> <span class="n">callback</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">ciph</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">m2</span><span class="p">,</span> <span class="n">cipher</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">if</span> <span class="n">ciph</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">RSAError</span><span class="p">(</span><span class="s1">'not such cipher </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="n">cipher</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">ciph</span> <span class="o">=</span> <span class="n">ciph</span><span class="p">()</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_write_key</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">,</span> <span class="n">bio</span><span class="o">.</span><span class="n">_ptr</span><span class="p">(),</span> <span class="n">ciph</span><span class="p">,</span> <span class="n">callback</span><span class="p">)</span></div>
<div class="viewcode-block" id="RSA.save_key"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.save_key">[docs]</a> <span class="k">def</span> <span class="nf">save_key</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">file</span><span class="p">,</span> <span class="n">cipher</span><span class="o">=</span><span class="s1">'aes_128_cbc'</span><span class="p">,</span>
<span class="n">callback</span><span class="o">=</span><span class="n">util</span><span class="o">.</span><span class="n">passphrase_callback</span><span class="p">):</span>
<span class="c1"># type: (AnyStr, Optional[str], Callable) -> int</span>
<span class="sd">"""</span>
<span class="sd"> Save the key pair to a file in PEM format.</span>
<span class="sd"> :param file: Name of file to save key to.</span>
<span class="sd"> :param cipher: Symmetric cipher to protect the key. The default</span>
<span class="sd"> cipher is 'aes_128_cbc'. If cipher is None, then</span>
<span class="sd"> the key is saved in the clear.</span>
<span class="sd"> :param callback: A Python callable object that is invoked</span>
<span class="sd"> to acquire a passphrase with which to protect</span>
<span class="sd"> the key. The default is</span>
<span class="sd"> util.passphrase_callback.</span>
<span class="sd"> """</span>
<span class="k">with</span> <span class="n">BIO</span><span class="o">.</span><span class="n">openfile</span><span class="p">(</span><span class="n">file</span><span class="p">,</span> <span class="s1">'wb'</span><span class="p">)</span> <span class="k">as</span> <span class="n">bio</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">save_key_bio</span><span class="p">(</span><span class="n">bio</span><span class="p">,</span> <span class="n">cipher</span><span class="p">,</span> <span class="n">callback</span><span class="p">)</span></div>
<span class="n">save_pem</span> <span class="o">=</span> <span class="n">save_key</span>
<div class="viewcode-block" id="RSA.as_pem"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.as_pem">[docs]</a> <span class="k">def</span> <span class="nf">as_pem</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">cipher</span><span class="o">=</span><span class="s1">'aes_128_cbc'</span><span class="p">,</span> <span class="n">callback</span><span class="o">=</span><span class="n">util</span><span class="o">.</span><span class="n">passphrase_callback</span><span class="p">):</span>
<span class="c1"># type: (Optional[str], Callable) -> bytes</span>
<span class="sd">"""</span>
<span class="sd"> Returns the key(pair) as a string in PEM format.</span>
<span class="sd"> """</span>
<span class="n">bio</span> <span class="o">=</span> <span class="n">BIO</span><span class="o">.</span><span class="n">MemoryBuffer</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">save_key_bio</span><span class="p">(</span><span class="n">bio</span><span class="p">,</span> <span class="n">cipher</span><span class="p">,</span> <span class="n">callback</span><span class="p">)</span>
<span class="k">return</span> <span class="n">bio</span><span class="o">.</span><span class="n">read</span><span class="p">()</span></div>
<div class="viewcode-block" id="RSA.save_key_der_bio"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.save_key_der_bio">[docs]</a> <span class="k">def</span> <span class="nf">save_key_der_bio</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bio</span><span class="p">):</span>
<span class="c1"># type: (BIO.BIO) -> int</span>
<span class="sd">"""</span>
<span class="sd"> Save the key pair to an M2Crypto.BIO.BIO object in DER format.</span>
<span class="sd"> :param bio: M2Crypto.BIO.BIO object to save key to.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_write_key_der</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">,</span> <span class="n">bio</span><span class="o">.</span><span class="n">_ptr</span><span class="p">())</span></div>
<div class="viewcode-block" id="RSA.save_key_der"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.save_key_der">[docs]</a> <span class="k">def</span> <span class="nf">save_key_der</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">file</span><span class="p">):</span>
<span class="c1"># type: (AnyStr) -> int</span>
<span class="sd">"""</span>
<span class="sd"> Save the key pair to a file in DER format.</span>
<span class="sd"> :param file: Filename to save key to</span>
<span class="sd"> """</span>
<span class="k">with</span> <span class="n">BIO</span><span class="o">.</span><span class="n">openfile</span><span class="p">(</span><span class="n">file</span><span class="p">,</span> <span class="s1">'wb'</span><span class="p">)</span> <span class="k">as</span> <span class="n">bio</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">save_key_der_bio</span><span class="p">(</span><span class="n">bio</span><span class="p">)</span></div>
<div class="viewcode-block" id="RSA.save_pub_key_bio"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.save_pub_key_bio">[docs]</a> <span class="k">def</span> <span class="nf">save_pub_key_bio</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bio</span><span class="p">):</span>
<span class="c1"># type: (BIO.BIO) -> int</span>
<span class="sd">"""</span>
<span class="sd"> Save the public key to an M2Crypto.BIO.BIO object in PEM format.</span>
<span class="sd"> :param bio: M2Crypto.BIO.BIO object to save key to.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_write_pub_key</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">,</span> <span class="n">bio</span><span class="o">.</span><span class="n">_ptr</span><span class="p">())</span></div>
<div class="viewcode-block" id="RSA.save_pub_key"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.save_pub_key">[docs]</a> <span class="k">def</span> <span class="nf">save_pub_key</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">file</span><span class="p">):</span>
<span class="c1"># type: (AnyStr) -> int</span>
<span class="sd">"""</span>
<span class="sd"> Save the public key to a file in PEM format.</span>
<span class="sd"> :param file: Name of file to save key to.</span>
<span class="sd"> """</span>
<span class="k">with</span> <span class="n">BIO</span><span class="o">.</span><span class="n">openfile</span><span class="p">(</span><span class="n">file</span><span class="p">,</span> <span class="s1">'wb'</span><span class="p">)</span> <span class="k">as</span> <span class="n">bio</span><span class="p">:</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_write_pub_key</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">,</span> <span class="n">bio</span><span class="o">.</span><span class="n">_ptr</span><span class="p">())</span></div>
<div class="viewcode-block" id="RSA.check_key"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.check_key">[docs]</a> <span class="k">def</span> <span class="nf">check_key</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># type: () -> int</span>
<span class="sd">"""</span>
<span class="sd"> Validate RSA keys.</span>
<span class="sd"> It checks that p and q are in fact prime, and that n = p*q.</span>
<span class="sd"> :return: returns 1 if rsa is a valid RSA key, and 0 otherwise.</span>
<span class="sd"> -1 is returned if an error occurs while checking the key.</span>
<span class="sd"> If the key is invalid or an error occurred, the reason</span>
<span class="sd"> code can be obtained using ERR_get_error(3).</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_check_key</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">)</span></div>
<div class="viewcode-block" id="RSA.sign_rsassa_pss"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.sign_rsassa_pss">[docs]</a> <span class="k">def</span> <span class="nf">sign_rsassa_pss</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">digest</span><span class="p">,</span> <span class="n">algo</span><span class="o">=</span><span class="s1">'sha1'</span><span class="p">,</span> <span class="n">salt_length</span><span class="o">=</span><span class="mi">20</span><span class="p">):</span>
<span class="c1"># type: (bytes, str, int) -> bytes</span>
<span class="sd">"""</span>
<span class="sd"> Signs a digest with the private key using RSASSA-PSS</span>
<span class="sd"> :param digest: A digest created by using the digest method</span>
<span class="sd"> :param salt_length: The length of the salt to use</span>
<span class="sd"> :param algo: The hash algorithm to use</span>
<span class="sd"> Legal values like 'sha1','sha224', 'sha256',</span>
<span class="sd"> 'ripemd160', and 'md5'.</span>
<span class="sd"> :return: a string which is the signature</span>
<span class="sd"> """</span>
<span class="nb">hash</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">m2</span><span class="p">,</span> <span class="n">algo</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">hash</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">RSAError</span><span class="p">(</span><span class="s1">'not such hash algorithm </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="n">algo</span><span class="p">)</span>
<span class="n">signature</span> <span class="o">=</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_padding_add_pkcs1_pss</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">,</span> <span class="n">digest</span><span class="p">,</span> <span class="nb">hash</span><span class="p">(),</span> <span class="n">salt_length</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">private_encrypt</span><span class="p">(</span><span class="n">signature</span><span class="p">,</span> <span class="n">m2</span><span class="o">.</span><span class="n">no_padding</span><span class="p">)</span></div>
<div class="viewcode-block" id="RSA.verify_rsassa_pss"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.verify_rsassa_pss">[docs]</a> <span class="k">def</span> <span class="nf">verify_rsassa_pss</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">signature</span><span class="p">,</span> <span class="n">algo</span><span class="o">=</span><span class="s1">'sha1'</span><span class="p">,</span> <span class="n">salt_length</span><span class="o">=</span><span class="mi">20</span><span class="p">):</span>
<span class="c1"># type: (bytes, bytes, str, int) -> int</span>
<span class="sd">"""</span>
<span class="sd"> Verifies the signature RSASSA-PSS</span>
<span class="sd"> :param data: Data that has been signed</span>
<span class="sd"> :param signature: The signature signed with RSASSA-PSS</span>
<span class="sd"> :param salt_length: The length of the salt that was used</span>
<span class="sd"> :param algo: The hash algorithm to use</span>
<span class="sd"> Legal values are for example 'sha1','sha224',</span>
<span class="sd"> 'sha256', 'ripemd160', and 'md5'.</span>
<span class="sd"> :return: 1 or 0, depending on whether the signature was</span>
<span class="sd"> verified or not.</span>
<span class="sd"> """</span>
<span class="nb">hash</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">m2</span><span class="p">,</span> <span class="n">algo</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">hash</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">RSAError</span><span class="p">(</span><span class="s1">'not such hash algorithm </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="n">algo</span><span class="p">)</span>
<span class="n">plain_signature</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">public_decrypt</span><span class="p">(</span><span class="n">signature</span><span class="p">,</span> <span class="n">m2</span><span class="o">.</span><span class="n">no_padding</span><span class="p">)</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_verify_pkcs1_pss</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">plain_signature</span><span class="p">,</span> <span class="nb">hash</span><span class="p">(),</span> <span class="n">salt_length</span><span class="p">)</span></div>
<div class="viewcode-block" id="RSA.sign"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.sign">[docs]</a> <span class="k">def</span> <span class="nf">sign</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">digest</span><span class="p">,</span> <span class="n">algo</span><span class="o">=</span><span class="s1">'sha1'</span><span class="p">):</span>
<span class="c1"># type: (bytes, str) -> bytes</span>
<span class="sd">"""</span>
<span class="sd"> Signs a digest with the private key</span>
<span class="sd"> :param digest: A digest created by using the digest method</span>
<span class="sd"> :param algo: The method that created the digest.</span>
<span class="sd"> Legal values like 'sha1','sha224', 'sha256',</span>
<span class="sd"> 'ripemd160', and 'md5'.</span>
<span class="sd"> :return: a string which is the signature</span>
<span class="sd"> """</span>
<span class="n">digest_type</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">m2</span><span class="p">,</span> <span class="s1">'NID_'</span> <span class="o">+</span> <span class="n">algo</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">if</span> <span class="n">digest_type</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'unknown algorithm'</span><span class="p">,</span> <span class="n">algo</span><span class="p">)</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_sign</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">,</span> <span class="n">digest</span><span class="p">,</span> <span class="n">digest_type</span><span class="p">)</span></div>
<div class="viewcode-block" id="RSA.verify"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA.verify">[docs]</a> <span class="k">def</span> <span class="nf">verify</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">signature</span><span class="p">,</span> <span class="n">algo</span><span class="o">=</span><span class="s1">'sha1'</span><span class="p">):</span>
<span class="c1"># type: (bytes, bytes, str) -> int</span>
<span class="sd">"""</span>
<span class="sd"> Verifies the signature with the public key</span>
<span class="sd"> :param data: Data that has been signed</span>
<span class="sd"> :param signature: The signature signed with the private key</span>
<span class="sd"> :param algo: The method use to create digest from the data</span>
<span class="sd"> before it was signed. Legal values like</span>
<span class="sd"> 'sha1','sha224', 'sha256', 'ripemd160', and 'md5'.</span>
<span class="sd"> :return: 1 or 0, depending on whether the signature was</span>
<span class="sd"> verified or not.</span>
<span class="sd"> """</span>
<span class="n">digest_type</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">m2</span><span class="p">,</span> <span class="s1">'NID_'</span> <span class="o">+</span> <span class="n">algo</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">if</span> <span class="n">digest_type</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'unknown algorithm'</span><span class="p">,</span> <span class="n">algo</span><span class="p">)</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_verify</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">signature</span><span class="p">,</span> <span class="n">digest_type</span><span class="p">)</span></div></div>
<div class="viewcode-block" id="RSA_pub"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA_pub">[docs]</a><span class="k">class</span> <span class="nc">RSA_pub</span><span class="p">(</span><span class="n">RSA</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Object interface to an RSA public key.</span>
<span class="sd"> """</span>
<span class="k">def</span> <span class="fm">__setattr__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span>
<span class="c1"># type: (str, bytes) -> None</span>
<span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="p">[</span><span class="s1">'e'</span><span class="p">,</span> <span class="s1">'n'</span><span class="p">]:</span>
<span class="k">raise</span> <span class="n">RSAError</span><span class="p">(</span><span class="s1">'use factory function new_pub_key() to set (e, n)'</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="vm">__dict__</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">value</span>
<div class="viewcode-block" id="RSA_pub.private_encrypt"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA_pub.private_encrypt">[docs]</a> <span class="k">def</span> <span class="nf">private_encrypt</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">argv</span><span class="p">):</span>
<span class="c1"># type: (*Any) -> None</span>
<span class="k">raise</span> <span class="n">RSAError</span><span class="p">(</span><span class="s1">'RSA_pub object has no private key'</span><span class="p">)</span></div>
<div class="viewcode-block" id="RSA_pub.private_decrypt"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA_pub.private_decrypt">[docs]</a> <span class="k">def</span> <span class="nf">private_decrypt</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">argv</span><span class="p">):</span>
<span class="c1"># type: (*Any) -> None</span>
<span class="k">raise</span> <span class="n">RSAError</span><span class="p">(</span><span class="s1">'RSA_pub object has no private key'</span><span class="p">)</span></div>
<div class="viewcode-block" id="RSA_pub.save_key"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA_pub.save_key">[docs]</a> <span class="k">def</span> <span class="nf">save_key</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">file</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kw</span><span class="p">):</span>
<span class="c1"># type: (AnyStr, *Any, **Any) -> int</span>
<span class="sd">"""</span>
<span class="sd"> Save public key to file.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">save_pub_key</span><span class="p">(</span><span class="n">file</span><span class="p">)</span></div>
<div class="viewcode-block" id="RSA_pub.save_key_bio"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA_pub.save_key_bio">[docs]</a> <span class="k">def</span> <span class="nf">save_key_bio</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">bio</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kw</span><span class="p">):</span>
<span class="c1"># type: (BIO.BIO, *Any, **Any) -> int</span>
<span class="sd">"""</span>
<span class="sd"> Save public key to BIO.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">save_pub_key_bio</span><span class="p">(</span><span class="n">bio</span><span class="p">)</span></div>
<span class="c1"># save_key_der</span>
<span class="c1"># save_key_der_bio</span>
<div class="viewcode-block" id="RSA_pub.check_key"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.RSA_pub.check_key">[docs]</a> <span class="k">def</span> <span class="nf">check_key</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># type: () -> int</span>
<span class="k">return</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_check_pub_key</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rsa</span><span class="p">)</span></div></div>
<div class="viewcode-block" id="rsa_error"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.rsa_error">[docs]</a><span class="k">def</span> <span class="nf">rsa_error</span><span class="p">():</span>
<span class="c1"># type: () -> None</span>
<span class="k">raise</span> <span class="n">RSAError</span><span class="p">(</span><span class="n">Err</span><span class="o">.</span><span class="n">get_error_message</span><span class="p">())</span></div>
<div class="viewcode-block" id="keygen_callback"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.keygen_callback">[docs]</a><span class="k">def</span> <span class="nf">keygen_callback</span><span class="p">(</span><span class="n">p</span><span class="p">,</span> <span class="n">n</span><span class="p">,</span> <span class="n">out</span><span class="o">=</span><span class="n">sys</span><span class="o">.</span><span class="n">stdout</span><span class="p">):</span>
<span class="c1"># type: (int, Any, IO[str]) -> None</span>
<span class="sd">"""</span>
<span class="sd"> Default callback for gen_key().</span>
<span class="sd"> """</span>
<span class="n">ch</span> <span class="o">=</span> <span class="p">[</span><span class="s1">'.'</span><span class="p">,</span> <span class="s1">'+'</span><span class="p">,</span> <span class="s1">'*'</span><span class="p">,</span> <span class="s1">'</span><span class="se">\n</span><span class="s1">'</span><span class="p">]</span>
<span class="n">out</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">ch</span><span class="p">[</span><span class="n">p</span><span class="p">])</span>
<span class="n">out</span><span class="o">.</span><span class="n">flush</span><span class="p">()</span></div>
<div class="viewcode-block" id="gen_key"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.gen_key">[docs]</a><span class="k">def</span> <span class="nf">gen_key</span><span class="p">(</span><span class="n">bits</span><span class="p">,</span> <span class="n">e</span><span class="p">,</span> <span class="n">callback</span><span class="o">=</span><span class="n">keygen_callback</span><span class="p">):</span>
<span class="c1"># type: (int, int, Callable) -> RSA</span>
<span class="sd">"""</span>
<span class="sd"> Generate an RSA key pair.</span>
<span class="sd"> :param bits: Key length, in bits.</span>
<span class="sd"> :param e: The RSA public exponent.</span>
<span class="sd"> :param callback: A Python callable object that is invoked</span>
<span class="sd"> during key generation; its usual purpose is to</span>
<span class="sd"> provide visual feedback. The default callback is</span>
<span class="sd"> keygen_callback.</span>
<span class="sd"> :return: M2Crypto.RSA.RSA object.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">RSA</span><span class="p">(</span><span class="n">m2</span><span class="o">.</span><span class="n">rsa_generate_key</span><span class="p">(</span><span class="n">bits</span><span class="p">,</span> <span class="n">e</span><span class="p">,</span> <span class="n">callback</span><span class="p">),</span> <span class="mi">1</span><span class="p">)</span></div>
<div class="viewcode-block" id="load_key"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.load_key">[docs]</a><span class="k">def</span> <span class="nf">load_key</span><span class="p">(</span><span class="n">file</span><span class="p">,</span> <span class="n">callback</span><span class="o">=</span><span class="n">util</span><span class="o">.</span><span class="n">passphrase_callback</span><span class="p">):</span>
<span class="c1"># type: (AnyStr, Callable) -> RSA</span>
<span class="sd">"""</span>
<span class="sd"> Load an RSA key pair from file.</span>
<span class="sd"> :param file: Name of file containing RSA public key in PEM format.</span>
<span class="sd"> :param callback: A Python callable object that is invoked</span>
<span class="sd"> to acquire a passphrase with which to unlock the</span>
<span class="sd"> key. The default is util.passphrase_callback.</span>
<span class="sd"> :return: M2Crypto.RSA.RSA object.</span>
<span class="sd"> """</span>
<span class="k">with</span> <span class="n">BIO</span><span class="o">.</span><span class="n">openfile</span><span class="p">(</span><span class="n">file</span><span class="p">)</span> <span class="k">as</span> <span class="n">bio</span><span class="p">:</span>
<span class="k">return</span> <span class="n">load_key_bio</span><span class="p">(</span><span class="n">bio</span><span class="p">,</span> <span class="n">callback</span><span class="p">)</span></div>
<div class="viewcode-block" id="load_key_bio"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.load_key_bio">[docs]</a><span class="k">def</span> <span class="nf">load_key_bio</span><span class="p">(</span><span class="n">bio</span><span class="p">,</span> <span class="n">callback</span><span class="o">=</span><span class="n">util</span><span class="o">.</span><span class="n">passphrase_callback</span><span class="p">):</span>
<span class="c1"># type: (BIO.BIO, Callable) -> RSA</span>
<span class="sd">"""</span>
<span class="sd"> Load an RSA key pair from an M2Crypto.BIO.BIO object.</span>
<span class="sd"> :param bio: M2Crypto.BIO.BIO object containing RSA key pair in PEM</span>
<span class="sd"> format.</span>
<span class="sd"> :param callback: A Python callable object that is invoked</span>
<span class="sd"> to acquire a passphrase with which to unlock the</span>
<span class="sd"> key. The default is util.passphrase_callback.</span>
<span class="sd"> :return: M2Crypto.RSA.RSA object.</span>
<span class="sd"> """</span>
<span class="n">rsa</span> <span class="o">=</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_read_key</span><span class="p">(</span><span class="n">bio</span><span class="o">.</span><span class="n">_ptr</span><span class="p">(),</span> <span class="n">callback</span><span class="p">)</span>
<span class="k">if</span> <span class="n">rsa</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">rsa_error</span><span class="p">()</span>
<span class="k">return</span> <span class="n">RSA</span><span class="p">(</span><span class="n">rsa</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span></div>
<div class="viewcode-block" id="load_key_string"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.load_key_string">[docs]</a><span class="k">def</span> <span class="nf">load_key_string</span><span class="p">(</span><span class="n">string</span><span class="p">,</span> <span class="n">callback</span><span class="o">=</span><span class="n">util</span><span class="o">.</span><span class="n">passphrase_callback</span><span class="p">):</span>
<span class="c1"># type: (AnyStr, Callable) -> RSA</span>
<span class="sd">"""</span>
<span class="sd"> Load an RSA key pair from a string.</span>
<span class="sd"> :param string: String containing RSA key pair in PEM format.</span>
<span class="sd"> :param callback: A Python callable object that is invoked</span>
<span class="sd"> to acquire a passphrase with which to unlock the</span>
<span class="sd"> key. The default is util.passphrase_callback.</span>
<span class="sd"> :return: M2Crypto.RSA.RSA object.</span>
<span class="sd"> """</span>
<span class="n">bio</span> <span class="o">=</span> <span class="n">BIO</span><span class="o">.</span><span class="n">MemoryBuffer</span><span class="p">(</span><span class="n">string</span><span class="p">)</span>
<span class="k">return</span> <span class="n">load_key_bio</span><span class="p">(</span><span class="n">bio</span><span class="p">,</span> <span class="n">callback</span><span class="p">)</span></div>
<div class="viewcode-block" id="load_pub_key"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.load_pub_key">[docs]</a><span class="k">def</span> <span class="nf">load_pub_key</span><span class="p">(</span><span class="n">file</span><span class="p">):</span>
<span class="c1"># type: (AnyStr) -> RSA_pub</span>
<span class="sd">"""</span>
<span class="sd"> Load an RSA public key from file.</span>
<span class="sd"> :param file: Name of file containing RSA public key in PEM format.</span>
<span class="sd"> :return: M2Crypto.RSA.RSA_pub object.</span>
<span class="sd"> """</span>
<span class="k">with</span> <span class="n">BIO</span><span class="o">.</span><span class="n">openfile</span><span class="p">(</span><span class="n">file</span><span class="p">)</span> <span class="k">as</span> <span class="n">bio</span><span class="p">:</span>
<span class="k">return</span> <span class="n">load_pub_key_bio</span><span class="p">(</span><span class="n">bio</span><span class="p">)</span></div>
<div class="viewcode-block" id="load_pub_key_bio"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.load_pub_key_bio">[docs]</a><span class="k">def</span> <span class="nf">load_pub_key_bio</span><span class="p">(</span><span class="n">bio</span><span class="p">):</span>
<span class="c1"># type: (BIO.BIO) -> RSA_pub</span>
<span class="sd">"""</span>
<span class="sd"> Load an RSA public key from an M2Crypto.BIO.BIO object.</span>
<span class="sd"> :param bio: M2Crypto.BIO.BIO object containing RSA public key in PEM</span>
<span class="sd"> format.</span>
<span class="sd"> :return: M2Crypto.RSA.RSA_pub object.</span>
<span class="sd"> """</span>
<span class="n">rsa</span> <span class="o">=</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_read_pub_key</span><span class="p">(</span><span class="n">bio</span><span class="o">.</span><span class="n">_ptr</span><span class="p">())</span>
<span class="k">if</span> <span class="n">rsa</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">rsa_error</span><span class="p">()</span>
<span class="k">return</span> <span class="n">RSA_pub</span><span class="p">(</span><span class="n">rsa</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span></div>
<div class="viewcode-block" id="new_pub_key"><a class="viewcode-back" href="../../M2Crypto.html#M2Crypto.RSA.new_pub_key">[docs]</a><span class="k">def</span> <span class="nf">new_pub_key</span><span class="p">(</span><span class="n">e_n</span><span class="p">):</span>
<span class="c1"># type: (Tuple[bytes, bytes]) -> RSA_pub</span>
<span class="sd">"""</span>
<span class="sd"> Instantiate an RSA_pub object from an (e, n) tuple.</span>
<span class="sd"> :param e: The RSA public exponent; it is a string in OpenSSL's MPINT</span>
<span class="sd"> format - 4-byte big-endian bit-count followed by the</span>
<span class="sd"> appropriate number of bits.</span>
<span class="sd"> :param n: The RSA composite of primes; it is a string in OpenSSL's</span>
<span class="sd"> MPINT format - 4-byte big-endian bit-count followed by the</span>
<span class="sd"> appropriate number of bits.</span>
<span class="sd"> :return: M2Crypto.RSA.RSA_pub object.</span>
<span class="sd"> """</span>
<span class="p">(</span><span class="n">e</span><span class="p">,</span> <span class="n">n</span><span class="p">)</span> <span class="o">=</span> <span class="n">e_n</span>
<span class="n">rsa</span> <span class="o">=</span> <span class="n">m2</span><span class="o">.</span><span class="n">rsa_new</span><span class="p">()</span>
<span class="n">m2</span><span class="o">.</span><span class="n">rsa_set_en</span><span class="p">(</span><span class="n">rsa</span><span class="p">,</span> <span class="n">e</span><span class="p">,</span> <span class="n">n</span><span class="p">)</span>
<span class="k">return</span> <span class="n">RSA_pub</span><span class="p">(</span><span class="n">rsa</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span></div>
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