static int get_ecdsa_sig_rs_bytes(const unsigned char *sig, size_t sig_len,
unsigned char **r, unsigned char **s,
size_t *rlen, size_t *slen)
static int get_ecdsa_sig_rs_bytes(const unsigned char *sig, size_t sig_len,
unsigned char **r, unsigned char **s,
size_t *rlen, size_t *slen)