diff options
Diffstat (limited to 'src/crypto/ec/internal.h')
| -rw-r--r-- | src/crypto/ec/internal.h | 47 |
1 files changed, 19 insertions, 28 deletions
diff --git a/src/crypto/ec/internal.h b/src/crypto/ec/internal.h index da116c4..0a8bf24 100644 --- a/src/crypto/ec/internal.h +++ b/src/crypto/ec/internal.h @@ -81,8 +81,6 @@ extern "C" { /* Use default functions for poin2oct, oct2point and compressed coordinates */ #define EC_FLAGS_DEFAULT_OCT 0x1 -typedef struct ec_method_st EC_METHOD; - struct ec_method_st { /* Various method flags */ int flags; @@ -205,35 +203,14 @@ struct ec_group_st { /* The following members are handled by the method functions, * even if they appear generic */ - BIGNUM field; /* Field specification. - * For curves over GF(p), this is the modulus; - * for curves over GF(2^m), this is the - * irreducible polynomial defining the field. */ - - int poly[6]; /* Field specification for curves over GF(2^m). - * The irreducible f(t) is then of the form: - * t^poly[0] + t^poly[1] + ... + t^poly[k] - * where m = poly[0] > poly[1] > ... > poly[k] = 0. - * The array is terminated with poly[k+1]=-1. - * All elliptic curve irreducibles have at most 5 - * non-zero terms. */ - - BIGNUM a, b; /* Curve coefficients. - * (Here the assumption is that BIGNUMs can be used - * or abused for all kinds of fields, not just GF(p).) - * For characteristic > 3, the curve is defined - * by a Weierstrass equation of the form - * y^2 = x^3 + a*x + b. - * For characteristic 2, the curve is defined by - * an equation of the form - * y^2 + x*y = x^3 + a*x^2 + b. */ + BIGNUM field; /* For curves over GF(p), this is the modulus. */ + + BIGNUM a, b; /* Curve coefficients. */ int a_is_minus3; /* enable optimized point arithmetics for special case */ - void *field_data1; /* method-specific (e.g., Montgomery structure) */ - void *field_data2; /* method-specific */ - int (*field_mod_func)(BIGNUM *, const BIGNUM *, const BIGNUM *, - BN_CTX *); /* method-specific */ + BN_MONT_CTX *mont; /* Montgomery structure. */ + BIGNUM *one; /* The value one */ } /* EC_GROUP */; struct ec_point_st { @@ -250,6 +227,7 @@ struct ec_point_st { } /* EC_POINT */; EC_GROUP *ec_group_new(const EC_METHOD *meth); +int ec_group_copy(EC_GROUP *dest, const EC_GROUP *src); int ec_wNAF_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, size_t num, const EC_POINT *points[], const BIGNUM *scalars[], @@ -329,6 +307,19 @@ int ec_point_set_Jprojective_coordinates_GFp(const EC_GROUP *group, const BIGNUM *y, const BIGNUM *z, BN_CTX *ctx); +void ec_GFp_nistp_points_make_affine_internal( + size_t num, void *point_array, size_t felem_size, void *tmp_felems, + void (*felem_one)(void *out), int (*felem_is_zero)(const void *in), + void (*felem_assign)(void *out, const void *in), + void (*felem_square)(void *out, const void *in), + void (*felem_mul)(void *out, const void *in1, const void *in2), + void (*felem_inv)(void *out, const void *in), + void (*felem_contract)(void *out, const void *in)); + +void ec_GFp_nistp_recode_scalar_bits(uint8_t *sign, uint8_t *digit, uint8_t in); + +const EC_METHOD *EC_GFp_nistp256_method(void); + struct ec_key_st { int version; |