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  5.   <title>Encrypts data with public key</title>
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  13. </div><hr /><div id="function.openssl-public-encrypt" class="refentry">
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  14.  <div class="refnamediv">
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  15.   <h1 class="refname">openssl_public_encrypt</h1>
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  16.   <p class="verinfo">(PHP 4 &gt;= 4.0.6, PHP 5)</p><p class="refpurpose"><span class="refname">openssl_public_encrypt</span> &mdash; <span class="dc-title">Encrypts data with public key </span></p>
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  18.  </div>
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  19.  
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  20.  <div class="refsect1 description" id="refsect1-function.openssl-public-encrypt-description">
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  21.   <h3 class="title">说明</h3>
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  22.   <div class="methodsynopsis dc-description">
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  23.    <span class="type">bool</span> <span class="methodname"><strong>openssl_public_encrypt</strong></span>
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  24.     ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$data</code></span>
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  25.    , <span class="methodparam"><span class="type">string</span> <code class="parameter reference">&$crypted</code></span>
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  26.    , <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$key</code></span>
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  27.    [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$padding</code><span class="initializer"> = OPENSSL_PKCS1_PADDING</span></span>
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  28.   ] )</div>
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  29. 

  30.   <p class="para rdfs-comment">
    31. 

  31.     <span class="function"><strong>openssl_public_encrypt()</strong></span> encrypts <em><code class="parameter">data</code></em>
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  32.    with public <em><code class="parameter">key</code></em> and stores the result into
    33. 

  33.    <em><code class="parameter">crypted</code></em>. Encrypted data can be decrypted via
    34. 

  34.     <span class="function"><a href="function.openssl-private-decrypt.html" class="function">openssl_private_decrypt()</a></span>. 
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  35.   </p>
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  36.   <p class="para">
    37. 

  37.    This function can be used e.g. to encrypt message which can be then read
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  38.    only by owner of the private key. It can be also used to store secure data
    39. 

  39.    in database.
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  40.   </p>
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  41.  </div>
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  42. 

  43. 

  44.  <div class="refsect1 parameters" id="refsect1-function.openssl-public-encrypt-parameters">
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  45.   <h3 class="title">参数</h3>
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  46.   <p class="para">
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  47.    <dl>
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  48. 

  49.     <dt>
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  50. 

  51.      <span class="term"><em><code class="parameter">data</code></em></span>
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  52.      <dd>
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  53. 

  54.       <p class="para">
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  55.       </p>
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  56.      </dd>
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  57. 

  58.     </dt>
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  59. 

  60.     <dt>
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  61. 

  62.      <span class="term"><em><code class="parameter">crypted</code></em></span>
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  63.      <dd>
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  64. 

  65.       <p class="para">
    66. 

  66.        This will hold the result of the encryption.
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  67.       </p>
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  68.      </dd>
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  69. 

  70.     </dt>
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  71. 

  72.     <dt>
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  73. 

  74.      <span class="term"><em><code class="parameter">key</code></em></span>
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  75.      <dd>
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  76. 

  77.       <p class="para">
    78. 

  78.        The public key.
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  79.       </p>
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  80.      </dd>
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  81. 

  82.     </dt>
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  83. 

  84.     <dt>
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  85. 

  86.      <span class="term"><em><code class="parameter">padding</code></em></span>
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  87.      <dd>
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  88. 

  89.       <p class="para">
    90. 

  90.        <em><code class="parameter">padding</code></em> can be one of
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  91.        <strong><code>OPENSSL_PKCS1_PADDING</code></strong>,
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  92.        <strong><code>OPENSSL_SSLV23_PADDING</code></strong>,
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  93.        <strong><code>OPENSSL_PKCS1_OAEP_PADDING</code></strong>,
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  94.        <strong><code>OPENSSL_NO_PADDING</code></strong>.
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  95.       </p>
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  96.      </dd>
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  97. 

  98.     </dt>
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  99. 

  100.    </dl>
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  101. 

  102.   </p>
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  103.  </div>
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  104. 

  105. 

  106.  <div class="refsect1 returnvalues" id="refsect1-function.openssl-public-encrypt-returnvalues">
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  107.   <h3 class="title">返回值</h3>
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  108.   <p class="para">
    109. 

  109.    成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>.
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  110.   </p>
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  111.  </div>
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  112. 

  113. 

  114.  <div class="refsect1 seealso" id="refsect1-function.openssl-public-encrypt-seealso">
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  115.   <h3 class="title">参见</h3>
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  116.   <p class="para">
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  117.    <ul class="simplelist">
    118. 

  118.     <li class="member"> <span class="function"><a href="function.openssl-private-encrypt.html" class="function" rel="rdfs-seeAlso">openssl_private_encrypt()</a> - Encrypts data with private key</span></li>
    119. 

  119.     <li class="member"> <span class="function"><a href="function.openssl-private-decrypt.html" class="function" rel="rdfs-seeAlso">openssl_private_decrypt()</a> - Decrypts data with private key</span></li>
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  120.    </ul>
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  121.   </p>
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