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<img alt="Erlang logo" src="../../../../doc/erlang-logo.png"><br><small><a href="users_guide.html">User's Guide</a><br><a href="index.html">Reference Manual</a><br><a href="release_notes.html">Release Notes</a><br><a href="../pdf/crypto-2.2.pdf">PDF</a><br><a href="../../../../doc/index.html">Top</a></small><p><strong>crypto</strong><br><strong>Reference Manual</strong><br><small>Version 2.2</small></p>
<br><a href="javascript:openAllFlips()">Expand All</a><br><a href="javascript:closeAllFlips()">Contract All</a><p><small><strong>Table of Contents</strong></small></p>
<ul class="flipMenu">
<li title="crypto (App)"><a href="crypto_app.html">crypto (App)
</a></li>
<li id="loadscrollpos" title="crypto " expanded="true">crypto<ul>
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Top of manual page
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<li title="start-0"><a href="crypto.html#start-0">start/0</a></li>
<li title="stop-0"><a href="crypto.html#stop-0">stop/0</a></li>
<li title="info-0"><a href="crypto.html#info-0">info/0</a></li>
<li title="info_lib-0"><a href="crypto.html#info_lib-0">info_lib/0</a></li>
<li title="md4-1"><a href="crypto.html#md4-1">md4/1</a></li>
<li title="md4_init-0"><a href="crypto.html#md4_init-0">md4_init/0</a></li>
<li title="md4_update-2"><a href="crypto.html#md4_update-2">md4_update/2</a></li>
<li title="md4_final-1"><a href="crypto.html#md4_final-1">md4_final/1</a></li>
<li title="md5-1"><a href="crypto.html#md5-1">md5/1</a></li>
<li title="md5_init-0"><a href="crypto.html#md5_init-0">md5_init/0</a></li>
<li title="md5_update-2"><a href="crypto.html#md5_update-2">md5_update/2</a></li>
<li title="md5_final-1"><a href="crypto.html#md5_final-1">md5_final/1</a></li>
<li title="sha-1"><a href="crypto.html#sha-1">sha/1</a></li>
<li title="sha_init-0"><a href="crypto.html#sha_init-0">sha_init/0</a></li>
<li title="sha_update-2"><a href="crypto.html#sha_update-2">sha_update/2</a></li>
<li title="sha_final-1"><a href="crypto.html#sha_final-1">sha_final/1</a></li>
<li title="hash-2"><a href="crypto.html#hash-2">hash/2</a></li>
<li title="hash_init-1"><a href="crypto.html#hash_init-1">hash_init/1</a></li>
<li title="hash_update-2"><a href="crypto.html#hash_update-2">hash_update/2</a></li>
<li title="hash_final-1"><a href="crypto.html#hash_final-1">hash_final/1</a></li>
<li title="md5_mac-2"><a href="crypto.html#md5_mac-2">md5_mac/2</a></li>
<li title="md5_mac_96-2"><a href="crypto.html#md5_mac_96-2">md5_mac_96/2</a></li>
<li title="hmac_init-2"><a href="crypto.html#hmac_init-2">hmac_init/2</a></li>
<li title="hmac_update-2"><a href="crypto.html#hmac_update-2">hmac_update/2</a></li>
<li title="hmac_final-1"><a href="crypto.html#hmac_final-1">hmac_final/1</a></li>
<li title="hmac_final_n-2"><a href="crypto.html#hmac_final_n-2">hmac_final_n/2</a></li>
<li title="sha_mac-2"><a href="crypto.html#sha_mac-2">sha_mac/2</a></li>
<li title="sha_mac-3"><a href="crypto.html#sha_mac-3">sha_mac/3</a></li>
<li title="sha_mac_96-2"><a href="crypto.html#sha_mac_96-2">sha_mac_96/2</a></li>
<li title="des_cbc_encrypt-3"><a href="crypto.html#des_cbc_encrypt-3">des_cbc_encrypt/3</a></li>
<li title="des_cbc_decrypt-3"><a href="crypto.html#des_cbc_decrypt-3">des_cbc_decrypt/3</a></li>
<li title="des_cbc_ivec-1"><a href="crypto.html#des_cbc_ivec-1">des_cbc_ivec/1</a></li>
<li title="des_cfb_encrypt-3"><a href="crypto.html#des_cfb_encrypt-3">des_cfb_encrypt/3</a></li>
<li title="des_cfb_decrypt-3"><a href="crypto.html#des_cfb_decrypt-3">des_cfb_decrypt/3</a></li>
<li title="des_cfb_ivec-2"><a href="crypto.html#des_cfb_ivec-2">des_cfb_ivec/2</a></li>
<li title="des3_cbc_encrypt-5"><a href="crypto.html#des3_cbc_encrypt-5">des3_cbc_encrypt/5</a></li>
<li title="des3_cbc_decrypt-5"><a href="crypto.html#des3_cbc_decrypt-5">des3_cbc_decrypt/5</a></li>
<li title="des3_cfb_encrypt-5"><a href="crypto.html#des3_cfb_encrypt-5">des3_cfb_encrypt/5</a></li>
<li title="des3_cfb_decrypt-5"><a href="crypto.html#des3_cfb_decrypt-5">des3_cfb_decrypt/5</a></li>
<li title="des_ecb_encrypt-2"><a href="crypto.html#des_ecb_encrypt-2">des_ecb_encrypt/2</a></li>
<li title="des_ecb_decrypt-2"><a href="crypto.html#des_ecb_decrypt-2">des_ecb_decrypt/2</a></li>
<li title="blowfish_ecb_encrypt-2"><a href="crypto.html#blowfish_ecb_encrypt-2">blowfish_ecb_encrypt/2</a></li>
<li title="blowfish_ecb_decrypt-2"><a href="crypto.html#blowfish_ecb_decrypt-2">blowfish_ecb_decrypt/2</a></li>
<li title="blowfish_cbc_encrypt-3"><a href="crypto.html#blowfish_cbc_encrypt-3">blowfish_cbc_encrypt/3</a></li>
<li title="blowfish_cbc_decrypt-3"><a href="crypto.html#blowfish_cbc_decrypt-3">blowfish_cbc_decrypt/3</a></li>
<li title="blowfish_cfb64_encrypt-3"><a href="crypto.html#blowfish_cfb64_encrypt-3">blowfish_cfb64_encrypt/3</a></li>
<li title="blowfish_cfb64_decrypt-3"><a href="crypto.html#blowfish_cfb64_decrypt-3">blowfish_cfb64_decrypt/3</a></li>
<li title="blowfish_ofb64_encrypt-3"><a href="crypto.html#blowfish_ofb64_encrypt-3">blowfish_ofb64_encrypt/3</a></li>
<li title="aes_cfb_128_encrypt-3"><a href="crypto.html#aes_cfb_128_encrypt-3">aes_cfb_128_encrypt/3</a></li>
<li title="aes_cfb_128_decrypt-3"><a href="crypto.html#aes_cfb_128_decrypt-3">aes_cfb_128_decrypt/3</a></li>
<li title="aes_cbc_128_encrypt-3"><a href="crypto.html#aes_cbc_128_encrypt-3">aes_cbc_128_encrypt/3</a></li>
<li title="aes_cbc_128_decrypt-3"><a href="crypto.html#aes_cbc_128_decrypt-3">aes_cbc_128_decrypt/3</a></li>
<li title="aes_cbc_ivec-1"><a href="crypto.html#aes_cbc_ivec-1">aes_cbc_ivec/1</a></li>
<li title="aes_ctr_encrypt-3"><a href="crypto.html#aes_ctr_encrypt-3">aes_ctr_encrypt/3</a></li>
<li title="aes_ctr_decrypt-3"><a href="crypto.html#aes_ctr_decrypt-3">aes_ctr_decrypt/3</a></li>
<li title="aes_ctr_stream_init-2"><a href="crypto.html#aes_ctr_stream_init-2">aes_ctr_stream_init/2</a></li>
<li title="aes_ctr_stream_encrypt-2"><a href="crypto.html#aes_ctr_stream_encrypt-2">aes_ctr_stream_encrypt/2</a></li>
<li title="aes_ctr_stream_decrypt-2"><a href="crypto.html#aes_ctr_stream_decrypt-2">aes_ctr_stream_decrypt/2</a></li>
<li title="erlint-1"><a href="crypto.html#erlint-1">erlint/1</a></li>
<li title="mpint-1"><a href="crypto.html#mpint-1">mpint/1</a></li>
<li title="rand_bytes-1"><a href="crypto.html#rand_bytes-1">rand_bytes/1</a></li>
<li title="strong_rand_bytes-1"><a href="crypto.html#strong_rand_bytes-1">strong_rand_bytes/1</a></li>
<li title="rand_uniform-2"><a href="crypto.html#rand_uniform-2">rand_uniform/2</a></li>
<li title="strong_rand_mpint-3"><a href="crypto.html#strong_rand_mpint-3">strong_rand_mpint/3</a></li>
<li title="mod_exp-3"><a href="crypto.html#mod_exp-3">mod_exp/3</a></li>
<li title="rsa_sign-2"><a href="crypto.html#rsa_sign-2">rsa_sign/2</a></li>
<li title="rsa_sign-3"><a href="crypto.html#rsa_sign-3">rsa_sign/3</a></li>
<li title="rsa_verify-3"><a href="crypto.html#rsa_verify-3">rsa_verify/3</a></li>
<li title="rsa_verify-4"><a href="crypto.html#rsa_verify-4">rsa_verify/4</a></li>
<li title="rsa_public_encrypt-3"><a href="crypto.html#rsa_public_encrypt-3">rsa_public_encrypt/3</a></li>
<li title="rsa_private_decrypt-3"><a href="crypto.html#rsa_private_decrypt-3">rsa_private_decrypt/3</a></li>
<li title="rsa_private_encrypt-3"><a href="crypto.html#rsa_private_encrypt-3">rsa_private_encrypt/3</a></li>
<li title="rsa_public_decrypt-3"><a href="crypto.html#rsa_public_decrypt-3">rsa_public_decrypt/3</a></li>
<li title="dss_sign-2"><a href="crypto.html#dss_sign-2">dss_sign/2</a></li>
<li title="dss_sign-3"><a href="crypto.html#dss_sign-3">dss_sign/3</a></li>
<li title="dss_verify-3"><a href="crypto.html#dss_verify-3">dss_verify/3</a></li>
<li title="dss_verify-4"><a href="crypto.html#dss_verify-4">dss_verify/4</a></li>
<li title="rc2_cbc_encrypt-3"><a href="crypto.html#rc2_cbc_encrypt-3">rc2_cbc_encrypt/3</a></li>
<li title="rc2_cbc_decrypt-3"><a href="crypto.html#rc2_cbc_decrypt-3">rc2_cbc_decrypt/3</a></li>
<li title="rc4_encrypt-2"><a href="crypto.html#rc4_encrypt-2">rc4_encrypt/2</a></li>
<li title="dh_generate_key-1"><a href="crypto.html#dh_generate_key-1">dh_generate_key/1</a></li>
<li title="dh_generate_key-2"><a href="crypto.html#dh_generate_key-2">dh_generate_key/2</a></li>
<li title="dh_compute_key-3"><a href="crypto.html#dh_compute_key-3">dh_compute_key/3</a></li>
<li title="exor-2"><a href="crypto.html#exor-2">exor/2</a></li>
</ul>
</li>
</ul>
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<div id="content">
<div class="innertube">
<!-- refpage --><center><h1>crypto</h1></center>
<h3>APPLICATION</h3>
<div class="REFBODY">crypto</div>
<h3>APPLICATION SUMMARY</h3>
<div class="REFBODY">The Crypto Application</div>
<h3>DESCRIPTION</h3>
<div class="REFBODY"><p>
<p>The purpose of the Crypto application is to provide message
digest and DES encryption for SMNPv3. It provides computation of
message digests MD5 and SHA, and CBC-DES encryption and
decryption.</p>
<p></p>
</p></div>
<h3><a name="id60530">Configuration</a></h3>
<div class="REFBODY">
<p>The following environment configuration parameters are defined
for the Crypto application. Refer to application(3) for more
information about configuration parameters.
</p>
<dl>
<dt><strong><span class="code">debug = true | false <optional></span></strong></dt>
<dd>
<p>Causes debug information to be written to standard
error or standard output. Default is <span class="code">false</span>.
</p>
</dd>
</dl>
</div>
<h3><a name="id60514">OpenSSL libraries</a></h3>
<div class="REFBODY">
<p>The current implementation of the Erlang Crypto application is
based on the <strong>OpenSSL</strong> package version 0.9.7 or higher.
There are source and binary releases on the web.
</p>
<p>Source releases of OpenSSL can be downloaded from the <span class="bold_code"><a href="http://www.openssl.org">OpenSSL</a></span> project home page,
or mirror sites listed there.
</p>
<p>The same URL also contains links to some compiled binaries and
libraries of OpenSSL (see the <span class="code">Related/Binaries</span> menu) of
which the <span class="bold_code"><a href="http://www.shininglightpro.com/search.php?searchname=Win32+OpenSSL">Shining Light Productions Win32 and OpenSSL</a></span> pages are of
interest for the Win32 user.
</p>
<p>For some Unix flavours there are binary packages available
on the net.
</p>
<p>If you cannot find a suitable binary OpenSSL package, you
have to fetch an OpenSSL source release and compile it.
</p>
<p>You then have to compile and install the library
<span class="code">libcrypto.so</span> (Unix), or the library <span class="code">libeay32.dll</span>
(Win32).
</p>
<p>For Unix The <span class="code">crypto_drv</span> dynamic driver is delivered linked
to OpenSSL libraries in <span class="code">/usr/local/lib</span>, but the default
dynamic linking will also accept libraries in <span class="code">/lib</span> and
<span class="code">/usr/lib</span>.
</p>
<p>If that is not applicable to the particular Unix operating
system used, the example <span class="code">Makefile</span> in the Crypto
<span class="code">priv/obj</span> directory, should be used as a basis for
relinking the final version of the port program.
</p>
<p>For <span class="code">Win32</span> it is only required that the library can be
found from the <span class="code">PATH</span> environment variable, or that they
reside in the appropriate <span class="code">SYSTEM32</span> directory; hence no
particular relinking is need. Hence no example <span class="code">Makefile</span>
for Win32 is provided.</p>
</div>
<h3><a name="id57346">SEE ALSO</a></h3>
<div class="REFBODY">
<p>application(3)</p>
</div>
</div>
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