71 lines
3.9 KiB
HTML
71 lines
3.9 KiB
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<?xml version="1.0" ?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>OPENSSL_hexchar2int</title>
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<meta http-equiv="content-type" content="text/html; charset=utf-8" />
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<link rev="made" href="mailto:" />
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</head>
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<body>
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<ul id="index">
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<li><a href="#NAME">NAME</a></li>
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<li><a href="#SYNOPSIS">SYNOPSIS</a></li>
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<li><a href="#DESCRIPTION">DESCRIPTION</a></li>
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<li><a href="#RETURN-VALUES">RETURN VALUES</a></li>
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<li><a href="#COPYRIGHT">COPYRIGHT</a></li>
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</ul>
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<h1 id="NAME">NAME</h1>
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<p>OPENSSL_hexchar2int, OPENSSL_hexstr2buf_ex, OPENSSL_hexstr2buf, OPENSSL_buf2hexstr_ex, OPENSSL_buf2hexstr - Hex encoding and decoding functions</p>
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<h1 id="SYNOPSIS">SYNOPSIS</h1>
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<pre><code> #include <openssl/crypto.h>
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int OPENSSL_hexchar2int(unsigned char c);
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int OPENSSL_hexstr2buf_ex(unsigned char *buf, size_t buf_n, long *buflen,
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const char *str, const char sep);
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unsigned char *OPENSSL_hexstr2buf(const char *str, long *len);
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int OPENSSL_buf2hexstr_ex(char *str, size_t str_n, size_t *strlength,
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const unsigned char *buf, long buflen,
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const char sep);
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char *OPENSSL_buf2hexstr(const unsigned char *buf, long buflen);</code></pre>
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<h1 id="DESCRIPTION">DESCRIPTION</h1>
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<p>OPENSSL_hexchar2int() converts a hexadecimal character to its numeric equivalent.</p>
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<p>OPENSSL_hexstr2buf_ex() decodes the hex string <b>str</b> and places the resulting string of bytes in the given <i>buf</i>. The character <i>sep</i> is the separator between the bytes, setting this to '\0' means that there is no separator. <i>buf_n</i> gives the size of the buffer. If <i>buflen</i> is not NULL, it is filled in with the result length. To find out how large the result will be, call this function with NULL for <i>buf</i>. Colons between two-character hex "bytes" are accepted and ignored. An odd number of hex digits is an error.</p>
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<p>OPENSSL_hexstr2buf() does the same thing as OPENSSL_hexstr2buf_ex(), but allocates the space for the result, and returns the result. It uses a default separator of ':'. The memory is allocated by calling OPENSSL_malloc() and should be released by calling OPENSSL_free().</p>
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<p>OPENSSL_buf2hexstr_ex() encodes the contents of the given <i>buf</i> with length <i>buflen</i> and places the resulting hexadecimal character string in the given <i>str</i>. The character <i>sep</i> is the separator between the bytes, setting this to '\0' means that there is no separator. <i>str_n</i> gives the size of the of the string buffer. If <i>strlength</i> is not NULL, it is filled in with the result length. To find out how large the result will be, call this function with NULL for <i>str</i>.</p>
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<p>OPENSSL_buf2hexstr() does the same thing as OPENSSL_buf2hexstr_ex(), but allocates the space for the result, and returns the result. It uses a default separator of ':'. The memory is allocated by calling OPENSSL_malloc() and should be released by calling OPENSSL_free().</p>
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<h1 id="RETURN-VALUES">RETURN VALUES</h1>
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<p>OPENSSL_hexchar2int returns the value of a decoded hex character, or -1 on error.</p>
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<p>OPENSSL_buf2hexstr() and OPENSSL_hexstr2buf() return a pointer to allocated memory, or NULL on error.</p>
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<p>OPENSSL_buf2hexstr_ex() and OPENSSL_hexstr2buf_ex() return 1 on success, or 0 on error.</p>
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<h1 id="COPYRIGHT">COPYRIGHT</h1>
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<p>Copyright 2016-2022 The OpenSSL Project Authors. All Rights Reserved.</p>
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<p>Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>
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</body>
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</html>
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