Commit 474d84ec authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

EC_METHOD customisation operations. 



Extend EC_METHOD to permit additional customisation of private key and
ECDH operations.

Reviewed-by: default avatarRich Salz <rsalz@openssl.org>
Reviewed-by: default avatarEmilia Käsper <emilia@openssl.org>
parent 899cf48f

crypto/ec/ec_lcl.h

+17 −0
Original line number Diff line number Diff line
@@ -83,6 +83,9 @@ 
/* Use default functions for poin2oct, oct2point and compressed coordinates */

#define EC_FLAGS_DEFAULT_OCT    0x1



/* Use custom formats for EC_GROUP, EC_POINT and EC_KEY */

#define EC_FLAGS_CUSTOM_CURVE   0x2



/*

 * Structure details are not part of the exported interface, so all this may

 * change in future versions.
@@ -195,6 +198,20 @@ struct ec_method_st { 
    int (*field_decode) (const EC_GROUP *, BIGNUM *r, const BIGNUM *a,

                         BN_CTX *);

    int (*field_set_to_one) (const EC_GROUP *, BIGNUM *r, BN_CTX *);

    /* private key operations */

    size_t (*priv2oct)(const EC_KEY *eckey, unsigned char *buf, size_t len);

    int (*oct2priv)(EC_KEY *eckey, unsigned char *buf, size_t len);

    int (*set_private)(EC_KEY *eckey, const BIGNUM *priv_key);

    int (*keygen)(EC_KEY *eckey);

    int (*keycheck)(const EC_KEY *eckey);

    int (*keygenpub)(EC_KEY *eckey);

    int (*keycopy)(EC_KEY *dst, const EC_KEY *src);

    void (*keyfinish)(EC_KEY *eckey);

    /* custom ECDH operation */

    int (*ecdh_compute_key)(void *out, size_t outlen, const EC_POINT *pub_key,

                            const EC_KEY *ecdh,

                            void *(*KDF) (const void *in, size_t inlen,

                                          void *out, size_t *outlen));

} /* EC_METHOD */ ;



/*