gnutls_decode_rs_value − API function
#include <gnutls/crypto.h>
int gnutls_decode_rs_value(const gnutls_datum_t * sig_value, gnutls_datum_t * r, gnutls_datum_t * s);
const gnutls_datum_t * sig_value
holds a Dss−Sig−Value DER or BER encoded structure
gnutls_datum_t * r
will contain the r value
gnutls_datum_t * s
will contain the s value
This function will decode the provided sig_value , into r and s elements. The Dss−Sig−Value is used for DSA and ECDSA signatures.
The output values may be padded with a zero byte to prevent them from being interpreted as negative values. The value should be deallocated using gnutls_free().
On success, GNUTLS_E_SUCCESS (0) is returned, otherwise an error code is returned.
3.6.0
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