[gnutls-devel] GnuTLS | GnuTLS handling of escape characters (#1677)

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Qianxin Cheng created an issue: https://gitlab.com/gnutls/gnutls/-/issues/1677



## Description of problem:
Hello Developer：
       I have a CRL file, and the "O" field in its issuer section contains an escape character. The value of the "O" field is 'VeriSign\'. When I use GnuTLS to parse this CRL file, GnuTLS interprets the "O" field as 'VeriSign\'. However, when I open the CRL file as a .crl file, the "O" field in the issuer section shows as 'VeriSign'.
      Therefore, I suspect that the handling of the escape character '\' by GnuTLS may not be entirely reasonable.

## Version of gnutls used:
GnuTLS 3.8.9

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

## How reproducible:

certtool --crl-info --inder --infile crl_file_.der

## Actual results:
The issuer field is parsed as Issuer: OU=Class 3 Public Primary Certification Authority,CN=test,O=VeriSign\\,L=test,ST=test,C=US.

## Expected results:
[crl_file_.der](/uploads/b674b4d460fac0bcdd1590920f6edf65/crl_file_.der)[crl_file_.crl](/uploads/d9bdeab38ac289b18339de7f1d4bcb4c/crl_file_.crl)

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