extern ecdsa_t *ecdsa_read_pem_public_key(FILE *fp) __attribute__((__malloc__));
extern ecdsa_t *ecdsa_read_pem_private_key(FILE *fp) __attribute__((__malloc__));
extern size_t ecdsa_size(ecdsa_t *ecdsa);
extern ecdsa_t *ecdsa_read_pem_public_key(FILE *fp) __attribute__((__malloc__));
extern ecdsa_t *ecdsa_read_pem_private_key(FILE *fp) __attribute__((__malloc__));
extern size_t ecdsa_size(ecdsa_t *ecdsa);