gnutls\_pkcs7\_verify\_direct(3) gnutls gnutls\_pkcs7\_verify\_direct(3)

# [NAME](#NAME)

gnutls\_pkcs7\_verify\_direct - API function

# [SYNOPSIS](#SYNOPSIS)

**#include <gnutls/pkcs7.h>**

**int gnutls\_pkcs7\_verify\_direct(gnutls\_pkcs7\_t pkcs7, gnutls\_x509\_crt\_t signer, unsigned idx, const gnutls\_datum\_t * data, unsigned flags);**

# [ARGUMENTS](#ARGUMENTS)

[gnutls\_pkcs7\_t pkcs7](#gnutls_pkcs7_t)

should contain a **gnutls\_pkcs7\_t** type

[gnutls\_x509\_crt\_t signer](#gnutls_x509_crt_t)

the certificate believed to have signed the structure

[unsigned idx](#unsigned)

the index of the signature info to check

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

The data to be verified or **NULL**

[unsigned flags](#unsigned~2)

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

# [DESCRIPTION](#DESCRIPTION)

This function will verify the provided data against the signature present in the SignedData of the PKCS **7** structure. If the data provided are NULL then the data in the encapsulatedContent field will be used instead.

Note that, unlike **gnutls\_pkcs7\_verify()** this function does not verify the key purpose of the signer. It is expected for the caller to verify the intended purpose of the **signer** -e.g., via **gnutls\_x509\_crt\_get\_key\_purpose\_oid()**, or **gnutls\_x509\_crt\_check\_key\_purpose()**.

Note also, that since GnuTLS 3.5.6 this function introduces checks in the end certificate ( *signer* ), including time checks and key usage checks.

# [RETURNS](#RETURNS)

On success, **GNUTLS\_E\_SUCCESS** (0) is returned, otherwise a negative error value. A verification error results to a **GNUTLS\_E\_PK\_SIG\_VERIFY\_FAILED** and the lack of encapsulated data to verify to a **GNUTLS\_E\_REQUESTED\_DATA\_NOT\_AVAILABLE**.

# [SINCE](#SINCE)

3.4.2

# [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_pkcs7_verify_direct(3) from gnutls 3.8.13-r1 (Chainguard OS)
Source: https://gitlab.com/gnutls/gnutls