gnutls\_pubkey\_verify\_hash2(3) gnutls gnutls\_pubkey\_verify\_hash2(3)

# [NAME](#NAME)

gnutls\_pubkey\_verify\_hash2 - API function

# [SYNOPSIS](#SYNOPSIS)

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

**int gnutls\_pubkey\_verify\_hash2(gnutls\_pubkey\_t key, gnutls\_sign\_algorithm\_t algo, unsigned int flags, const gnutls\_datum\_t * hash, const gnutls\_datum\_t * signature);**

# [ARGUMENTS](#ARGUMENTS)

[gnutls\_pubkey\_t key](#gnutls_pubkey_t)

Holds the public key

[gnutls\_sign\_algorithm\_t algo](#gnutls_sign_algorithm_t)

The signature algorithm used

[unsigned int flags](#unsigned)

Zero or an OR list of **gnutls\_certificate\_verify\_flags**

[const gnutls\_datum\_t * hash](#const)

holds the hash digest to be verified

[const gnutls\_datum\_t * signature](#const~2)

contains the signature

# [DESCRIPTION](#DESCRIPTION)

This function will verify the given signed digest, using the parameters from the public key. Note that unlike **gnutls\_privkey\_sign\_hash()**, this function accepts a signature algorithm instead of a digest algorithm. You can use **gnutls\_pk\_to\_sign()** to get the appropriate value.

# [RETURNS](#RETURNS)

In case of a verification failure **GNUTLS\_E\_PK\_SIG\_VERIFY\_FAILED** is returned, and zero or positive code on success. For known to be insecure signatures this function will return **GNUTLS\_E\_INSUFFICIENT\_SECURITY** unless the flag **GNUTLS\_VERIFY\_ALLOW\_BROKEN** is specified.

# [SINCE](#SINCE)

3.0

# [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

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Document: gnutls_pubkey_verify_hash2(3) from gnutls 3.8.13-r1 (Chainguard OS)
Source: https://gitlab.com/gnutls/gnutls