[gnutls-devel] GnuTLS | GnuTLS Verification Error (#1669)

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dulanshuangqiao created an issue: https://gitlab.com/gnutls/gnutls/-/issues/1669



## Description of problem:
GnuTLS incorrectly passed the certificate validation, which is different from the validation results of OpenSSL and WolfSSL, and violates RFC5280.
The test case I provided includes the CRLDistributionPoints extension, but the extension value is empty
RFC5280 mentions: When a conforming CA includes a CRLDistributionPoints extension in a certificate, it MUST include at least one DistributionPoint that points to a CRL that covers the certificate for all reasons.

## Version of gnutls used:
gnutls-cli 3.7.3

## Distributor of gnutls (e.g., Ubuntu, Fedora, RHEL)
Ubuntu

## How reproducible:

Steps to Reproduce:

 * one certtool --verify --load-ca-certificate RootCA.pem --infile Cert1732784533877D1.pem

## Actual results:
Chain verification output: Verified. The certificate is trusted. 

## Expected results:
Chain verification output: Not verified.

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