p);
unsigned char *OPENSSL_hexstr2buf(const char *str, long *len);
int OPENSSL_buf2hexstr_ex(char *str, size_t str_n, size_t *strlength,
                          const unsigned char *buf, long buflen,
                          const char sep);
char *OPENSSL_buf2hexstr(const unsigned char *buf, long buflen);</code></pre>

<h1 id="DESCRIPTION">DESCRIPTION</h1>

<p>OPENSSL_hexchar2int() converts a hexadecimal character to its numeric equivalent.</p>

<p>OPENSSL_hexstr2buf_ex() decodes the hex string <b>str</b