gnutls\_pkcs11\_privkey\_export\_pubkey(3) gnutls gnutls\_pkcs11\_privkey\_export\_pubkey(3)

# [NAME](#NAME)

gnutls\_pkcs11\_privkey\_export\_pubkey - API function

# [SYNOPSIS](#SYNOPSIS)

**#include <gnutls/pkcs11.h>**

**int gnutls\_pkcs11\_privkey\_export\_pubkey(gnutls\_pkcs11\_privkey\_t pkey, gnutls\_x509\_crt\_fmt\_t fmt, gnutls\_datum\_t * data, unsigned int flags);**

# [ARGUMENTS](#ARGUMENTS)

[gnutls\_pkcs11\_privkey\_t pkey](#gnutls_pkcs11_privkey_t)

The private key

[gnutls\_x509\_crt\_fmt\_t fmt](#gnutls_x509_crt_fmt_t)

the format of output params. PEM or DER.

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

will hold the public key

[unsigned int flags](#unsigned)

should be zero

# [DESCRIPTION](#DESCRIPTION)

This function will extract the public key (modulus and public exponent) from the private key specified by the *url* private key. This public key will be stored in *pubkey* in the format specified by *fmt* . *pubkey* should be deinitialized using **gnutls\_free()**.

# [RETURNS](#RETURNS)

On success, **GNUTLS\_E\_SUCCESS** (0) is returned, otherwise a negative error value.

# [SINCE](#SINCE)

3.3.7

# [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

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Document: gnutls_pkcs11_privkey_export_pubkey(3) from gnutls 3.8.13-r3 (Chainguard OS)
Source: https://gitlab.com/gnutls/gnutls