.\" $NetBSD: OPENSSL_hexchar2int.3,v 1.2.2.3 2023/11/02 19:32:25 sborrill Exp $ .\" .\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.43) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" OPENSSL_hexchar2int, OPENSSL_hexstr2buf_ex, OPENSSL_hexstr2buf, OPENSSL_buf2hexstr_ex, OPENSSL_buf2hexstr \&\- Hex encoding and decoding functions .SH "LIBRARY" libcrypto, -lcrypto .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include \& \& int OPENSSL_hexchar2int(unsigned char c); \& int OPENSSL_hexstr2buf_ex(unsigned char *buf, size_t buf_n, long *buflen, \& const char *str, const char sep); \& 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); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBOPENSSL_hexchar2int()\fR converts a hexadecimal character to its numeric equivalent. .PP \&\fBOPENSSL_hexstr2buf_ex()\fR decodes the hex string \fBstr\fR and places the resulting string of bytes in the given \fIbuf\fR. The character \fIsep\fR is the separator between the bytes, setting this to '\e0' means that there is no separator. \&\fIbuf_n\fR gives the size of the buffer. If \fIbuflen\fR is not \s-1NULL,\s0 it is filled in with the result length. To find out how large the result will be, call this function with \s-1NULL\s0 for \fIbuf\fR. Colons between two-character hex \*(L"bytes\*(R" are accepted and ignored. An odd number of hex digits is an error. .PP \&\fBOPENSSL_hexstr2buf()\fR does the same thing as \fBOPENSSL_hexstr2buf_ex()\fR, but allocates the space for the result, and returns the result. It uses a default separator of ':'. The memory is allocated by calling \fBOPENSSL_malloc()\fR and should be released by calling \fBOPENSSL_free()\fR. .PP \&\fBOPENSSL_buf2hexstr_ex()\fR encodes the contents of the given \fIbuf\fR with length \fIbuflen\fR and places the resulting hexadecimal character string in the given \fIstr\fR. The character \fIsep\fR is the separator between the bytes, setting this to '\e0' means that there is no separator. \&\fIstr_n\fR gives the size of the of the string buffer. If \fIstrlength\fR is not \s-1NULL,\s0 it is filled in with the result length. To find out how large the result will be, call this function with \s-1NULL\s0 for \fIstr\fR. .PP \&\fBOPENSSL_buf2hexstr()\fR does the same thing as \fBOPENSSL_buf2hexstr_ex()\fR, but allocates the space for the result, and returns the result. It uses a default separator of ':'. The memory is allocated by calling \fBOPENSSL_malloc()\fR and should be released by calling \fBOPENSSL_free()\fR. .SH "RETURN VALUES" .IX Header "RETURN VALUES" OPENSSL_hexchar2int returns the value of a decoded hex character, or \-1 on error. .PP \&\fBOPENSSL_buf2hexstr()\fR and \fBOPENSSL_hexstr2buf()\fR return a pointer to allocated memory, or \s-1NULL\s0 on error. .PP \&\fBOPENSSL_buf2hexstr_ex()\fR and \fBOPENSSL_hexstr2buf_ex()\fR return 1 on success, or 0 on error. .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2016\-2022 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at .