size_t EC_KEY_key2buf(const EC_KEY *eckey, point_conversion_form_t form,
unsigned char **pbuf, BN_CTX *ctx);
- int EC_KEY_oct2priv(EC_KEY *eckey, unsigned char *buf, size_t len);
+ int EC_KEY_oct2priv(EC_KEY *eckey, const unsigned char *buf, size_t len);
size_t EC_KEY_priv2oct(const EC_KEY *eckey, unsigned char *buf, size_t len);
size_t EC_KEY_priv2buf(const EC_KEY *eckey, unsigned char **pbuf);