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gnutls_x509_c..._signature_oid(3) gnutlsgnutls_x509_c..._signature_oid(3)
       gnutls_x509_crq_get_signature_oid - API function
       #include <gnutls/x509.h>
       int gnutls_x509_crq_get_signature_oid(gnutls_x509_crq_t crq, char
       * oid, size_t * oid_size);
       gnutls_x509_crq_t crq
                   should contain a gnutls_x509_crq_t type
       char * oid  a pointer to a buffer to hold the OID (may be null)
       size_t * oid_size
                   initially holds the size of  oid
       This function will return the OID of the signature algorithm that
       has been used to sign this certificate request. This function is
       useful in the case gnutls_x509_crq_get_signature_algorithm()
       returned GNUTLS_SIGN_UNKNOWN.
       zero or a negative error code on error.
       3.5.0
       Report bugs to <[email protected]>.
       Home page: https://www.gnutls.org
       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.
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       the HTML form visit
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       Library) project.  Information about the project can be found at
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gnutls                            3.8.10gnutls_x509_c..._signature_oid(3)