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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 &#39;:&#39;. The memory is allocated by calling OPENSSL_malloc() and should be released by calling OPENSSL_free().</p>

<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 bet