---
name: "oath_bin2hex"
section: "3"
platform: "linux"
package: "oath-toolkit"
version: "2.6.15-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/oath_bin2hex"
---

# oath\_bin2hex(3)

API function

## NAME

oath\_bin2hex - API function

## SYNOPSIS

**#include \<oath.h\>**

**void oath\_bin2hex(const char \*** *binstr***, size\_t** *binlen***, char \*** *hexstr***);**

## ARGUMENTS

- const char \* binstr

  input binary data

- size\_t binlen

  length of input binary data *binstr*

- char \* hexstr

  output string with hex data, must have room for 2\**binlen*+1.

## DESCRIPTION

Convert binary data to NUL-terminated string with hex data.  The output *hexstr* is allocated by the caller and must have room for at least 2\**binlen*+1, to make room for the encoded data and the terminating NUL byte.

## SINCE

1\.12.0

## REPORTING BUGS

Report bugs to \<oath-toolkit-help@nongnu.org\>. liboath home page: https://oath-toolkit.codeberg.page/ General help using GNU software: http://www.gnu.org/gethelp/

## COPYRIGHT

Copyright © 2009-2026 Simon Josefsson.\
 Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.