-/* crypto/ec/ec_lcl.h */
/*
* Originally written by Bodo Moeller for the OpenSSL project.
*/
/* 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.
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 */ ;
-typedef struct ec_extra_data_st {
- struct ec_extra_data_st *next;
- void *data;
- void *(*dup_func) (void *);
- void (*free_func) (void *);
- void (*clear_free_func) (void *);
-} EC_EXTRA_DATA; /* used in EC_GROUP */
+/*
+ * Types and functions to manipulate pre-computed values.
+ */
+typedef struct nistp224_pre_comp_st NISTP224_PRE_COMP;
+typedef struct nistp256_pre_comp_st NISTP256_PRE_COMP;
+typedef struct nistp521_pre_comp_st NISTP521_PRE_COMP;
+typedef struct nistz256_pre_comp_st NISTZ256_PRE_COMP;
+typedef struct ec_pre_comp_st EC_PRE_COMP;
struct ec_group_st {
const EC_METHOD *meth;
unsigned char *seed; /* optional seed for parameters (appears in
* ASN1) */
size_t seed_len;
- EC_EXTRA_DATA *extra_data; /* linked list */
/*
* The following members are handled by the method functions, even if
* they appear generic
BN_CTX *);
/* data for ECDSA inverse */
BN_MONT_CTX *mont_data;
+
+ /* precomputed values for speed. */
+ enum {
+ pct_none,
+ pct_nistp224, pct_nistp256, pct_nistp521, pct_nistz256,
+ pct_ec } pre_comp_type;
+ union {
+ NISTP224_PRE_COMP *nistp224;
+ NISTP256_PRE_COMP *nistp256;
+ NISTP521_PRE_COMP *nistp521;
+ NISTZ256_PRE_COMP *nistz256;
+ EC_PRE_COMP *ec;
+ } pre_comp;
} /* EC_GROUP */ ;
+#define SETPRECOMP(g, type, pre) \
+ g->pre_comp_type = pct_##type, g->pre_comp.type = pre
+#define HAVEPRECOMP(g, type) \
+ g->pre_comp_type == pct_##type && g->pre_comp.type != NULL
+
struct ec_key_st {
const EC_KEY_METHOD *meth;
ENGINE *engine;
EC_GROUP *group;
EC_POINT *pub_key;
BIGNUM *priv_key;
+ /*
+ * Arbitrary extra data.
+ * For example in X25519 this contains the raw private key in a 32 byte
+ * buffer.
+ */
+ void *custom_data;
unsigned int enc_flag;
point_conversion_form_t conv_form;
int references;
int flags;
- EC_EXTRA_DATA *method_data;
+ CRYPTO_EX_DATA ex_data;
} /* EC_KEY */ ;
-/*
- * Basically a 'mixin' for extra data, but available for EC_GROUPs/EC_KEYs
- * only (with visibility limited to 'package' level for now). We use the
- * function pointers as index for retrieval; this obviates global
- * ex_data-style index tables.
- */
-int EC_EX_DATA_set_data(EC_EXTRA_DATA **, void *data,
- void *(*dup_func) (void *),
- void (*free_func) (void *),
- void (*clear_free_func) (void *));
-void *EC_EX_DATA_get_data(const EC_EXTRA_DATA *, void *(*dup_func) (void *),
- void (*free_func) (void *),
- void (*clear_free_func) (void *));
-void EC_EX_DATA_free_data(EC_EXTRA_DATA **, void *(*dup_func) (void *),
- void (*free_func) (void *),
- void (*clear_free_func) (void *));
-void EC_EX_DATA_clear_free_data(EC_EXTRA_DATA **, void *(*dup_func) (void *),
- void (*free_func) (void *),
- void (*clear_free_func) (void *));
-void EC_EX_DATA_free_all_data(EC_EXTRA_DATA **);
-void EC_EX_DATA_clear_free_all_data(EC_EXTRA_DATA **);
-
struct ec_point_st {
const EC_METHOD *meth;
/*
* Z) represents (X/Z^2, Y/Z^3) if Z != 0 */
int Z_is_one; /* enable optimized point arithmetics for
* special case */
+ /*
+ * Arbitrary extra data.
+ * For example in X25519 this contains the public key in a 32 byte buffer.
+ */
+ void *custom_data;
} /* EC_POINT */ ;
+NISTP224_PRE_COMP *EC_nistp224_pre_comp_dup(NISTP224_PRE_COMP *);
+NISTP256_PRE_COMP *EC_nistp256_pre_comp_dup(NISTP256_PRE_COMP *);
+NISTP521_PRE_COMP *EC_nistp521_pre_comp_dup(NISTP521_PRE_COMP *);
+NISTZ256_PRE_COMP *EC_nistz256_pre_comp_dup(NISTZ256_PRE_COMP *);
+NISTP256_PRE_COMP *EC_nistp256_pre_comp_dup(NISTP256_PRE_COMP *);
+EC_PRE_COMP *EC_ec_pre_comp_dup(EC_PRE_COMP *);
+
+void EC_pre_comp_free(EC_GROUP *group);
+void EC_nistp224_pre_comp_free(NISTP224_PRE_COMP *);
+void EC_nistp256_pre_comp_free(NISTP256_PRE_COMP *);
+void EC_nistp521_pre_comp_free(NISTP521_PRE_COMP *);
+void EC_nistz256_pre_comp_free(NISTZ256_PRE_COMP *);
+void EC_ec_pre_comp_free(EC_PRE_COMP *);
+
/*
* method functions in ec_mult.c (ec_lib.c uses these as defaults if
* group->method->mul is 0)
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