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  74. NAME="function.openssl-pkcs7-encrypt"
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  75. ></A
    76. 

  76. >openssl_pkcs7_encrypt</H1
    77. 

  77. ><DIV
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  78. CLASS="refnamediv"
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  79. ><A
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  80. NAME="AEN68248"
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    82. 

  82. ><P
    83. 

  83. >    (PHP 4 &#62;= 4.0.6)</P
    84. 

  84. >openssl_pkcs7_encrypt&nbsp;--&nbsp;Encrypt an S/MIME message</DIV
    85. 

  85. ><DIV
    86. 

  86. CLASS="refsect1"
    87. 

  87. ><A
    88. 

  88. NAME="AEN68251"
    89. 

  89. ></A
    90. 

  90. ><H2
    91. 

  91. >Description</H2
    92. 

  92. >bool <B
    93. 

  93. CLASS="methodname"
    94. 

  94. >openssl_pkcs7_encrypt</B
    95. 

  95. > ( string infile, string outfile, mixed recipcerts, array headers [, long flags])<BR
    96. 

  96. ></BR
    97. 

  97. ><P
    98. 

  98. >&#13;     <B
    99. 

  99. CLASS="function"
    100. 

  100. >openssl_pkcs7_encrypt()</B
    101. 

  101. > takes the contents of the
    102. 

  102.      file named <TT
    103. 

  103. CLASS="parameter"
    104. 

  104. ><I
    105. 

  105. >infile</I
    106. 

  106. ></TT
    107. 

  107. > and encrypts them using an RC2
    108. 

  108.      40-bit cipher so that they can only be read by the intended recipients
    109. 

  109.      specified by <TT
    110. 

  110. CLASS="parameter"
    111. 

  111. ><I
    112. 

  112. >recipcerts</I
    113. 

  113. ></TT
    114. 

  114. >, which is either a
    115. 

  115.      lone X.509 certificate, or an array of X.509 certificates.
    116. 

  116.      <TT
    117. 

  117. CLASS="parameter"
    118. 

  118. ><I
    119. 

  119. >headers</I
    120. 

  120. ></TT
    121. 

  121. > is an array of headers that
    122. 

  122.      will be prepended to the data after it has been encrypted.
    123. 

  123.      <TT
    124. 

  124. CLASS="parameter"
    125. 

  125. ><I
    126. 

  126. >flags</I
    127. 

  127. ></TT
    128. 

  128. > can be used to specify options that affect
    129. 

  129.      the encoding process - see <A
    130. 

  130. HREF="ref.openssl.html#openssl.pkcs7.flags"
    131. 

  131. >PKCS7
    132. 

  132.      constants</A
    133. 

  133. >.
    134. 

  134.      <TT
    135. 

  135. CLASS="parameter"
    136. 

  136. ><I
    137. 

  137. >headers</I
    138. 

  138. ></TT
    139. 

  139. > can be either an associative array
    140. 

  140.      keyed by header name, or an indexed array, where each element contains
    141. 

  141.      a single header line.
    142. 

  142.     </P
    143. 

  143. ><P
    144. 

  144. >&#13;     <TABLE
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    151. 

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    152. 

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    157. 

  157. ><P
    158. 

  158. ><B
    159. 

  159. >Example 1. <B
    160. 

  160. CLASS="function"
    161. 

  161. >openssl_pkcs7_encrypt()</B
    162. 

  162. > example</B
    163. 

  163. ></P
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    170. 

  170. ><PRE
    171. 

  171. CLASS="php"
    172. 

  172. >// the message you want to encrypt and send to your secret agent
    173. 

  173. // in the field, known as nighthawk.  You have his certificate
    174. 

  174. // in the file nighthawk.pem
    175. 

  175. $data = &#60;&#60;&#60;EOD
    176. 

  176. Nighthawk,
    177. 

  177. 

  178. Top secret, for your eyes only!
    179. 

  179. 

  180. The enemy is closing in! Meet me at the cafe at 8.30am
    181. 

  181. to collect your forged passport!
    182. 

  182. 

  183. HQ
    184. 

  184. EOD;
    185. 

  185. 

  186. // load key
    187. 

  187. $key = file_get_contents("nighthawk.pem");
    188. 

  188. 

  189. // save message to file
    190. 

  190. $fp = fopen("msg.txt", "w");
    191. 

  191. fwrite($fp, $data);
    192. 

  192. fclose($fp);
    193. 

  193. 

  194. // encrypt it
    195. 

  195. if (openssl_pkcs7_encrypt("msg.txt", "enc.txt", $key,
    196. 

  196.     array("To" =&#62; "nighthawk@example.com", // keyed syntax
    197. 

  197.           "From: HQ &#60;hq@example.com&#62;", // indexed syntax
    198. 

  198.           "Subject" =&#62; "Eyes only")))
    199. 

  199. {
    200. 

  200.     // message encrypted - send it!
    201. 

  201.     exec(ini_get("sendmail_path") . " &#60; enc.txt");
    202. 

  202. }</PRE
    203. 

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