diff options
Diffstat (limited to 'third_party/bearssl/src/ec_all_m31.c')
| -rw-r--r-- | third_party/bearssl/src/ec_all_m31.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/third_party/bearssl/src/ec_all_m31.c b/third_party/bearssl/src/ec_all_m31.c new file mode 100644 index 0000000..8fd8c3c --- /dev/null +++ b/third_party/bearssl/src/ec_all_m31.c @@ -0,0 +1,171 @@ +/* + * Copyright (c) 2017 Thomas Pornin <[email protected]> + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "inner.h" + +static const unsigned char * +api_generator(int curve, size_t *len) +{ + switch (curve) { + case BR_EC_secp256r1: +#if BR_INT128 || BR_UMUL128 + return br_ec_p256_m64.generator(curve, len); +#else + return br_ec_p256_m31.generator(curve, len); +#endif + case BR_EC_curve25519: +#if BR_INT128 || BR_UMUL128 + return br_ec_c25519_m64.generator(curve, len); +#else + return br_ec_c25519_m31.generator(curve, len); +#endif + default: + return br_ec_prime_i31.generator(curve, len); + } +} + +static const unsigned char * +api_order(int curve, size_t *len) +{ + switch (curve) { + case BR_EC_secp256r1: +#if BR_INT128 || BR_UMUL128 + return br_ec_p256_m64.order(curve, len); +#else + return br_ec_p256_m31.order(curve, len); +#endif + case BR_EC_curve25519: +#if BR_INT128 || BR_UMUL128 + return br_ec_c25519_m64.order(curve, len); +#else + return br_ec_c25519_m31.order(curve, len); +#endif + default: + return br_ec_prime_i31.order(curve, len); + } +} + +static size_t +api_xoff(int curve, size_t *len) +{ + switch (curve) { + case BR_EC_secp256r1: +#if BR_INT128 || BR_UMUL128 + return br_ec_p256_m64.xoff(curve, len); +#else + return br_ec_p256_m31.xoff(curve, len); +#endif + case BR_EC_curve25519: +#if BR_INT128 || BR_UMUL128 + return br_ec_c25519_m64.xoff(curve, len); +#else + return br_ec_c25519_m31.xoff(curve, len); +#endif + default: + return br_ec_prime_i31.xoff(curve, len); + } +} + +static uint32_t +api_mul(unsigned char *G, size_t Glen, + const unsigned char *kb, size_t kblen, int curve) +{ + switch (curve) { + case BR_EC_secp256r1: +#if BR_INT128 || BR_UMUL128 + return br_ec_p256_m64.mul(G, Glen, kb, kblen, curve); +#else + return br_ec_p256_m31.mul(G, Glen, kb, kblen, curve); +#endif + case BR_EC_curve25519: +#if BR_INT128 || BR_UMUL128 + return br_ec_c25519_m64.mul(G, Glen, kb, kblen, curve); +#else + return br_ec_c25519_m31.mul(G, Glen, kb, kblen, curve); +#endif + default: + return br_ec_prime_i31.mul(G, Glen, kb, kblen, curve); + } +} + +static size_t +api_mulgen(unsigned char *R, + const unsigned char *x, size_t xlen, int curve) +{ + switch (curve) { + case BR_EC_secp256r1: +#if BR_INT128 || BR_UMUL128 + return br_ec_p256_m64.mulgen(R, x, xlen, curve); +#else + return br_ec_p256_m31.mulgen(R, x, xlen, curve); +#endif + case BR_EC_curve25519: +#if BR_INT128 || BR_UMUL128 + return br_ec_c25519_m64.mulgen(R, x, xlen, curve); +#else + return br_ec_c25519_m31.mulgen(R, x, xlen, curve); +#endif + default: + return br_ec_prime_i31.mulgen(R, x, xlen, curve); + } +} + +static uint32_t +api_muladd(unsigned char *A, const unsigned char *B, size_t len, + const unsigned char *x, size_t xlen, + const unsigned char *y, size_t ylen, int curve) +{ + switch (curve) { + case BR_EC_secp256r1: +#if BR_INT128 || BR_UMUL128 + return br_ec_p256_m64.muladd(A, B, len, + x, xlen, y, ylen, curve); +#else + return br_ec_p256_m31.muladd(A, B, len, + x, xlen, y, ylen, curve); +#endif + case BR_EC_curve25519: +#if BR_INT128 || BR_UMUL128 + return br_ec_c25519_m64.muladd(A, B, len, + x, xlen, y, ylen, curve); +#else + return br_ec_c25519_m31.muladd(A, B, len, + x, xlen, y, ylen, curve); +#endif + default: + return br_ec_prime_i31.muladd(A, B, len, + x, xlen, y, ylen, curve); + } +} + +/* see bearssl_ec.h */ +const br_ec_impl br_ec_all_m31 = { + (uint32_t)0x23800000, + &api_generator, + &api_order, + &api_xoff, + &api_mul, + &api_mulgen, + &api_muladd +}; |