gnutls\_decode\_rs\_value(3) gnutls gnutls\_decode\_rs\_value(3)

# [NAME](#NAME)

gnutls\_decode\_rs\_value - API function

# [SYNOPSIS](#SYNOPSIS)

**#include <gnutls/crypto.h>**

**int gnutls\_decode\_rs\_value(const gnutls\_datum\_t * sig\_value, gnutls\_datum\_t * r, gnutls\_datum\_t * s);**

# [ARGUMENTS](#ARGUMENTS)

[const gnutls\_datum\_t * sig\_value](#const)

holds a Dss-Sig-Value DER or BER encoded structure

[gnutls\_datum\_t * r](#gnutls_datum_t)

will contain the r value

[gnutls\_datum\_t * s](#gnutls_datum_t~2)

will contain the s value

# [DESCRIPTION](#DESCRIPTION)

This function will decode the provided *sig\_value* , into *r* and *s* elements. The Dss-Sig-Value is used for DSA and ECDSA signatures.

The output values may be padded with a zero byte to prevent them from being interpreted as negative values. The value should be deallocated using **gnutls\_free()**.

# [RETURNS](#RETURNS)

On success, **GNUTLS\_E\_SUCCESS** (0) is returned, otherwise an error code is returned.

# [SINCE](#SINCE)

3.6.0

# [REPORTING BUGS](#REPORTING_BUGS)

Report bugs to <bugs@gnutls.org>.  
Home page: https://www.gnutls.org

# [COPYRIGHT](#COPYRIGHT)

Copyright © 2001-2023 Free Software Foundation, Inc., and others.  
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.

# [SEE ALSO](#SEE_ALSO)

The full documentation for **gnutls** is maintained as a Texinfo manual. If the /usr/share/doc/gnutls/ directory does not contain the HTML form visit

[https://www.gnutls.org/manual/](https://www.gnutls.org/manual/)

3.8.13 gnutls

---

Document: gnutls_decode_rs_value(3) from gnutls 3.8.13-r1 (Chainguard OS)
Source: https://gitlab.com/gnutls/gnutls