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Diffstat (limited to 'security/nss/lib/freebl/ecl/ecl-priv.h')
| -rw-r--r-- | security/nss/lib/freebl/ecl/ecl-priv.h | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/ecl/ecl-priv.h b/security/nss/lib/freebl/ecl/ecl-priv.h new file mode 100644 index 0000000000..c1e0e856b3 --- /dev/null +++ b/security/nss/lib/freebl/ecl/ecl-priv.h @@ -0,0 +1,252 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef __ecl_priv_h_ +#define __ecl_priv_h_ + +#include "ecl.h" +#include "mpi.h" +#include "mplogic.h" +#include "../blapii.h" + +/* MAX_FIELD_SIZE_DIGITS is the maximum size of field element supported */ +/* the following needs to go away... */ +#if defined(MP_USE_LONG_LONG_DIGIT) || defined(MP_USE_LONG_DIGIT) +#define ECL_SIXTY_FOUR_BIT +#else +#define ECL_THIRTY_TWO_BIT +#endif + +#define ECL_CURVE_DIGITS(curve_size_in_bits) \ + (((curve_size_in_bits) + (sizeof(mp_digit) * 8 - 1)) / (sizeof(mp_digit) * 8)) +#define ECL_BITS (sizeof(mp_digit) * 8) +#define ECL_MAX_FIELD_SIZE_DIGITS (80 / sizeof(mp_digit)) + +/* Gets the i'th bit in the binary representation of a. If i >= length(a), + * then return 0. (The above behaviour differs from mpl_get_bit, which + * causes an error if i >= length(a).) */ +#define MP_GET_BIT(a, i) \ + ((i) >= mpl_significant_bits((a))) ? 0 : mpl_get_bit((a), (i)) + +#if !defined(MP_NO_MP_WORD) && !defined(MP_NO_ADD_WORD) +#define MP_ADD_CARRY(a1, a2, s, carry) \ + { \ + mp_word w; \ + w = ((mp_word)carry) + (a1) + (a2); \ + s = ACCUM(w); \ + carry = CARRYOUT(w); \ + } + +#define MP_SUB_BORROW(a1, a2, s, borrow) \ + { \ + mp_word w; \ + w = ((mp_word)(a1)) - (a2)-borrow; \ + s = ACCUM(w); \ + borrow = (w >> MP_DIGIT_BIT) & 1; \ + } + +#else +/* NOTE, + * carry and borrow are both read and written. + * a1 or a2 and s could be the same variable. + * don't trash those outputs until their respective inputs have + * been read. */ +#define MP_ADD_CARRY(a1, a2, s, carry) \ + { \ + mp_digit tmp, sum; \ + tmp = (a1); \ + sum = tmp + (a2); \ + tmp = (sum < tmp); /* detect overflow */ \ + s = sum += carry; \ + carry = tmp + (sum < carry); \ + } + +#define MP_SUB_BORROW(a1, a2, s, borrow) \ + { \ + mp_digit tmp; \ + tmp = (a1); \ + s = tmp - (a2); \ + tmp = (s > tmp); /* detect borrow */ \ + if (borrow && !s--) \ + tmp++; \ + borrow = tmp; \ + } +#endif + +struct GFMethodStr; +typedef struct GFMethodStr GFMethod; +struct GFMethodStr { + /* Indicates whether the structure was constructed from dynamic memory + * or statically created. */ + int constructed; + /* Irreducible that defines the field. For prime fields, this is the + * prime p. For binary polynomial fields, this is the bitstring + * representation of the irreducible polynomial. */ + mp_int irr; + /* For prime fields, the value irr_arr[0] is the number of bits in the + * field. For binary polynomial fields, the irreducible polynomial + * f(t) is represented as an array of unsigned int[], where f(t) is + * of the form: f(t) = t^p[0] + t^p[1] + ... + t^p[4] where m = p[0] + * > p[1] > ... > p[4] = 0. */ + unsigned int irr_arr[5]; + /* Field arithmetic methods. All methods (except field_enc and + * field_dec) are assumed to take field-encoded parameters and return + * field-encoded values. All methods (except field_enc and field_dec) + * are required to be implemented. */ + mp_err (*field_add)(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); + mp_err (*field_neg)(const mp_int *a, mp_int *r, const GFMethod *meth); + mp_err (*field_sub)(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); + mp_err (*field_mod)(const mp_int *a, mp_int *r, const GFMethod *meth); + mp_err (*field_mul)(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); + mp_err (*field_sqr)(const mp_int *a, mp_int *r, const GFMethod *meth); + mp_err (*field_div)(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); + mp_err (*field_enc)(const mp_int *a, mp_int *r, const GFMethod *meth); + mp_err (*field_dec)(const mp_int *a, mp_int *r, const GFMethod *meth); + /* Extra storage for implementation-specific data. Any memory + * allocated to these extra fields will be cleared by extra_free. */ + void *extra1; + void *extra2; + void (*extra_free)(GFMethod *meth); +}; + +/* Construct generic GFMethods. */ +GFMethod *GFMethod_consGFp(const mp_int *irr); +GFMethod *GFMethod_consGFp_mont(const mp_int *irr); + +/* Free the memory allocated (if any) to a GFMethod object. */ +void GFMethod_free(GFMethod *meth); + +struct ECGroupStr { + /* Indicates whether the structure was constructed from dynamic memory + * or statically created. */ + int constructed; + /* Field definition and arithmetic. */ + GFMethod *meth; + /* Textual representation of curve name, if any. */ + char *text; + /* Curve parameters, field-encoded. */ + mp_int curvea, curveb; + /* x and y coordinates of the base point, field-encoded. */ + mp_int genx, geny; + /* Order and cofactor of the base point. */ + mp_int order; + int cofactor; + /* Point arithmetic methods. All methods are assumed to take + * field-encoded parameters and return field-encoded values. All + * methods (except base_point_mul and points_mul) are required to be + * implemented. */ + mp_err (*point_add)(const mp_int *px, const mp_int *py, + const mp_int *qx, const mp_int *qy, mp_int *rx, + mp_int *ry, const ECGroup *group); + mp_err (*point_sub)(const mp_int *px, const mp_int *py, + const mp_int *qx, const mp_int *qy, mp_int *rx, + mp_int *ry, const ECGroup *group); + mp_err (*point_dbl)(const mp_int *px, const mp_int *py, mp_int *rx, + mp_int *ry, const ECGroup *group); + mp_err (*point_mul)(const mp_int *n, const mp_int *px, + const mp_int *py, mp_int *rx, mp_int *ry, + const ECGroup *group); + mp_err (*base_point_mul)(const mp_int *n, mp_int *rx, mp_int *ry, + const ECGroup *group); + mp_err (*points_mul)(const mp_int *k1, const mp_int *k2, + const mp_int *px, const mp_int *py, mp_int *rx, + mp_int *ry, const ECGroup *group); + mp_err (*validate_point)(const mp_int *px, const mp_int *py, const ECGroup *group); + /* Extra storage for implementation-specific data. Any memory + * allocated to these extra fields will be cleared by extra_free. */ + void *extra1; + void *extra2; + void (*extra_free)(ECGroup *group); +}; + +/* Wrapper functions for generic prime field arithmetic. */ +mp_err ec_GFp_add(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); +mp_err ec_GFp_neg(const mp_int *a, mp_int *r, const GFMethod *meth); +mp_err ec_GFp_sub(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); + +/* fixed length in-line adds. Count is in words */ +mp_err ec_GFp_add_3(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); +mp_err ec_GFp_add_4(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); +mp_err ec_GFp_add_5(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); +mp_err ec_GFp_add_6(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); +mp_err ec_GFp_sub_3(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); +mp_err ec_GFp_sub_4(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); +mp_err ec_GFp_sub_5(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); +mp_err ec_GFp_sub_6(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); + +mp_err ec_GFp_mod(const mp_int *a, mp_int *r, const GFMethod *meth); +mp_err ec_GFp_mul(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); +mp_err ec_GFp_sqr(const mp_int *a, mp_int *r, const GFMethod *meth); +mp_err ec_GFp_div(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); +/* Wrapper functions for generic binary polynomial field arithmetic. */ +mp_err ec_GF2m_add(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); +mp_err ec_GF2m_neg(const mp_int *a, mp_int *r, const GFMethod *meth); +mp_err ec_GF2m_mod(const mp_int *a, mp_int *r, const GFMethod *meth); +mp_err ec_GF2m_mul(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); +mp_err ec_GF2m_sqr(const mp_int *a, mp_int *r, const GFMethod *meth); +mp_err ec_GF2m_div(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); + +/* Montgomery prime field arithmetic. */ +mp_err ec_GFp_mul_mont(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); +mp_err ec_GFp_sqr_mont(const mp_int *a, mp_int *r, const GFMethod *meth); +mp_err ec_GFp_div_mont(const mp_int *a, const mp_int *b, mp_int *r, + const GFMethod *meth); +mp_err ec_GFp_enc_mont(const mp_int *a, mp_int *r, const GFMethod *meth); +mp_err ec_GFp_dec_mont(const mp_int *a, mp_int *r, const GFMethod *meth); +void ec_GFp_extra_free_mont(GFMethod *meth); + +/* point multiplication */ +mp_err ec_pts_mul_basic(const mp_int *k1, const mp_int *k2, + const mp_int *px, const mp_int *py, mp_int *rx, + mp_int *ry, const ECGroup *group); +mp_err ec_pts_mul_simul_w2(const mp_int *k1, const mp_int *k2, + const mp_int *px, const mp_int *py, mp_int *rx, + mp_int *ry, const ECGroup *group); + +/* Computes the windowed non-adjacent-form (NAF) of a scalar. Out should + * be an array of signed char's to output to, bitsize should be the number + * of bits of out, in is the original scalar, and w is the window size. + * NAF is discussed in the paper: D. Hankerson, J. Hernandez and A. + * Menezes, "Software implementation of elliptic curve cryptography over + * binary fields", Proc. CHES 2000. */ +mp_err ec_compute_wNAF(signed char *out, int bitsize, const mp_int *in, + int w); + +/* Optimized field arithmetic */ +mp_err ec_group_set_gfp192(ECGroup *group, ECCurveName); +mp_err ec_group_set_gfp224(ECGroup *group, ECCurveName); +mp_err ec_group_set_gfp256(ECGroup *group, ECCurveName); +mp_err ec_group_set_gfp384(ECGroup *group, ECCurveName); +mp_err ec_group_set_gfp521(ECGroup *group, ECCurveName); +mp_err ec_group_set_gf2m163(ECGroup *group, ECCurveName name); +mp_err ec_group_set_gf2m193(ECGroup *group, ECCurveName name); +mp_err ec_group_set_gf2m233(ECGroup *group, ECCurveName name); + +/* Optimized point multiplication */ +mp_err ec_group_set_gfp256_32(ECGroup *group, ECCurveName name); +mp_err ec_group_set_secp384r1(ECGroup *group, ECCurveName name); +mp_err ec_group_set_secp521r1(ECGroup *group, ECCurveName name); + +SECStatus ec_Curve25519_mul(PRUint8 *q, const PRUint8 *s, const PRUint8 *p); +#endif /* __ecl_priv_h_ */ |