* Store bignum in byte array of given length, prepending by zeros if
* nesseccary
*/
-int store_bignum(BIGNUM *bn, unsigned char *buf, int len);
+int store_bignum(const BIGNUM *bn, unsigned char *buf, int len);
/* Pack GOST R 34.10 signature according to CryptoPro rules */
int pack_sign_cp(DSA_SIG *s, int order, unsigned char *sig, size_t *siglen);
/* from ameth.c */