diff options
Diffstat (limited to 'src/ext/ed25519/donna/ed25519-hash.h')
| -rw-r--r-- | src/ext/ed25519/donna/ed25519-hash.h | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/src/ext/ed25519/donna/ed25519-hash.h b/src/ext/ed25519/donna/ed25519-hash.h new file mode 100644 index 0000000000..6ba8f52383 --- /dev/null +++ b/src/ext/ed25519/donna/ed25519-hash.h @@ -0,0 +1,219 @@ +#if defined(ED25519_REFHASH) + +/* reference/slow SHA-512. really, do not use this */ + +#define HASH_BLOCK_SIZE 128 +#define HASH_DIGEST_SIZE 64 + +typedef struct sha512_state_t { + uint64_t H[8]; + uint64_t T[2]; + uint32_t leftover; + uint8_t buffer[HASH_BLOCK_SIZE]; +} sha512_state; + +typedef sha512_state ed25519_hash_context; + +static const uint64_t sha512_constants[80] = { + 0x428a2f98d728ae22ull, 0x7137449123ef65cdull, 0xb5c0fbcfec4d3b2full, 0xe9b5dba58189dbbcull, + 0x3956c25bf348b538ull, 0x59f111f1b605d019ull, 0x923f82a4af194f9bull, 0xab1c5ed5da6d8118ull, + 0xd807aa98a3030242ull, 0x12835b0145706fbeull, 0x243185be4ee4b28cull, 0x550c7dc3d5ffb4e2ull, + 0x72be5d74f27b896full, 0x80deb1fe3b1696b1ull, 0x9bdc06a725c71235ull, 0xc19bf174cf692694ull, + 0xe49b69c19ef14ad2ull, 0xefbe4786384f25e3ull, 0x0fc19dc68b8cd5b5ull, 0x240ca1cc77ac9c65ull, + 0x2de92c6f592b0275ull, 0x4a7484aa6ea6e483ull, 0x5cb0a9dcbd41fbd4ull, 0x76f988da831153b5ull, + 0x983e5152ee66dfabull, 0xa831c66d2db43210ull, 0xb00327c898fb213full, 0xbf597fc7beef0ee4ull, + 0xc6e00bf33da88fc2ull, 0xd5a79147930aa725ull, 0x06ca6351e003826full, 0x142929670a0e6e70ull, + 0x27b70a8546d22ffcull, 0x2e1b21385c26c926ull, 0x4d2c6dfc5ac42aedull, 0x53380d139d95b3dfull, + 0x650a73548baf63deull, 0x766a0abb3c77b2a8ull, 0x81c2c92e47edaee6ull, 0x92722c851482353bull, + 0xa2bfe8a14cf10364ull, 0xa81a664bbc423001ull, 0xc24b8b70d0f89791ull, 0xc76c51a30654be30ull, + 0xd192e819d6ef5218ull, 0xd69906245565a910ull, 0xf40e35855771202aull, 0x106aa07032bbd1b8ull, + 0x19a4c116b8d2d0c8ull, 0x1e376c085141ab53ull, 0x2748774cdf8eeb99ull, 0x34b0bcb5e19b48a8ull, + 0x391c0cb3c5c95a63ull, 0x4ed8aa4ae3418acbull, 0x5b9cca4f7763e373ull, 0x682e6ff3d6b2b8a3ull, + 0x748f82ee5defb2fcull, 0x78a5636f43172f60ull, 0x84c87814a1f0ab72ull, 0x8cc702081a6439ecull, + 0x90befffa23631e28ull, 0xa4506cebde82bde9ull, 0xbef9a3f7b2c67915ull, 0xc67178f2e372532bull, + 0xca273eceea26619cull, 0xd186b8c721c0c207ull, 0xeada7dd6cde0eb1eull, 0xf57d4f7fee6ed178ull, + 0x06f067aa72176fbaull, 0x0a637dc5a2c898a6ull, 0x113f9804bef90daeull, 0x1b710b35131c471bull, + 0x28db77f523047d84ull, 0x32caab7b40c72493ull, 0x3c9ebe0a15c9bebcull, 0x431d67c49c100d4cull, + 0x4cc5d4becb3e42b6ull, 0x597f299cfc657e2aull, 0x5fcb6fab3ad6faecull, 0x6c44198c4a475817ull +}; + +static uint64_t +sha512_ROTR64(uint64_t x, int k) { + return (x >> k) | (x << (64 - k)); +} + +static uint64_t +sha512_LOAD64_BE(const uint8_t *p) { + return + ((uint64_t)p[0] << 56) | + ((uint64_t)p[1] << 48) | + ((uint64_t)p[2] << 40) | + ((uint64_t)p[3] << 32) | + ((uint64_t)p[4] << 24) | + ((uint64_t)p[5] << 16) | + ((uint64_t)p[6] << 8) | + ((uint64_t)p[7] ); +} + +static void +sha512_STORE64_BE(uint8_t *p, uint64_t v) { + p[0] = (uint8_t)(v >> 56); + p[1] = (uint8_t)(v >> 48); + p[2] = (uint8_t)(v >> 40); + p[3] = (uint8_t)(v >> 32); + p[4] = (uint8_t)(v >> 24); + p[5] = (uint8_t)(v >> 16); + p[6] = (uint8_t)(v >> 8); + p[7] = (uint8_t)(v ); +} + +#define Ch(x,y,z) (z ^ (x & (y ^ z))) +#define Maj(x,y,z) (((x | y) & z) | (x & y)) +#define S0(x) (sha512_ROTR64(x, 28) ^ sha512_ROTR64(x, 34) ^ sha512_ROTR64(x, 39)) +#define S1(x) (sha512_ROTR64(x, 14) ^ sha512_ROTR64(x, 18) ^ sha512_ROTR64(x, 41)) +#define G0(x) (sha512_ROTR64(x, 1) ^ sha512_ROTR64(x, 8) ^ (x >> 7)) +#define G1(x) (sha512_ROTR64(x, 19) ^ sha512_ROTR64(x, 61) ^ (x >> 6)) +#define W0(in,i) (sha512_LOAD64_BE(&in[i * 8])) +#define W1(i) (G1(w[i - 2]) + w[i - 7] + G0(w[i - 15]) + w[i - 16]) +#define STEP(i) \ + t1 = S0(r[0]) + Maj(r[0], r[1], r[2]); \ + t0 = r[7] + S1(r[4]) + Ch(r[4], r[5], r[6]) + sha512_constants[i] + w[i]; \ + r[7] = r[6]; \ + r[6] = r[5]; \ + r[5] = r[4]; \ + r[4] = r[3] + t0; \ + r[3] = r[2]; \ + r[2] = r[1]; \ + r[1] = r[0]; \ + r[0] = t0 + t1; + +static void +sha512_blocks(sha512_state *S, const uint8_t *in, size_t blocks) { + uint64_t r[8], w[80], t0, t1; + size_t i; + + for (i = 0; i < 8; i++) r[i] = S->H[i]; + + while (blocks--) { + for (i = 0; i < 16; i++) { w[i] = W0(in, i); } + for (i = 16; i < 80; i++) { w[i] = W1(i); } + for (i = 0; i < 80; i++) { STEP(i); } + for (i = 0; i < 8; i++) { r[i] += S->H[i]; S->H[i] = r[i]; } + S->T[0] += HASH_BLOCK_SIZE * 8; + S->T[1] += (!S->T[0]) ? 1 : 0; + in += HASH_BLOCK_SIZE; + } +} + +static void +ed25519_hash_init(sha512_state *S) { + S->H[0] = 0x6a09e667f3bcc908ull; + S->H[1] = 0xbb67ae8584caa73bull; + S->H[2] = 0x3c6ef372fe94f82bull; + S->H[3] = 0xa54ff53a5f1d36f1ull; + S->H[4] = 0x510e527fade682d1ull; + S->H[5] = 0x9b05688c2b3e6c1full; + S->H[6] = 0x1f83d9abfb41bd6bull; + S->H[7] = 0x5be0cd19137e2179ull; + S->T[0] = 0; + S->T[1] = 0; + S->leftover = 0; +} + +static void +ed25519_hash_update(sha512_state *S, const uint8_t *in, size_t inlen) { + size_t blocks, want; + + /* handle the previous data */ + if (S->leftover) { + want = (HASH_BLOCK_SIZE - S->leftover); + want = (want < inlen) ? want : inlen; + memcpy(S->buffer + S->leftover, in, want); + S->leftover += (uint32_t)want; + if (S->leftover < HASH_BLOCK_SIZE) + return; + in += want; + inlen -= want; + sha512_blocks(S, S->buffer, 1); + } + + /* handle the current data */ + blocks = (inlen & ~(HASH_BLOCK_SIZE - 1)); + S->leftover = (uint32_t)(inlen - blocks); + if (blocks) { + sha512_blocks(S, in, blocks / HASH_BLOCK_SIZE); + in += blocks; + } + + /* handle leftover data */ + if (S->leftover) + memcpy(S->buffer, in, S->leftover); +} + +static void +ed25519_hash_final(sha512_state *S, uint8_t *hash) { + uint64_t t0 = S->T[0] + (S->leftover * 8), t1 = S->T[1]; + + S->buffer[S->leftover] = 0x80; + if (S->leftover <= 111) { + memset(S->buffer + S->leftover + 1, 0, 111 - S->leftover); + } else { + memset(S->buffer + S->leftover + 1, 0, 127 - S->leftover); + sha512_blocks(S, S->buffer, 1); + memset(S->buffer, 0, 112); + } + + sha512_STORE64_BE(S->buffer + 112, t1); + sha512_STORE64_BE(S->buffer + 120, t0); + sha512_blocks(S, S->buffer, 1); + + sha512_STORE64_BE(&hash[ 0], S->H[0]); + sha512_STORE64_BE(&hash[ 8], S->H[1]); + sha512_STORE64_BE(&hash[16], S->H[2]); + sha512_STORE64_BE(&hash[24], S->H[3]); + sha512_STORE64_BE(&hash[32], S->H[4]); + sha512_STORE64_BE(&hash[40], S->H[5]); + sha512_STORE64_BE(&hash[48], S->H[6]); + sha512_STORE64_BE(&hash[56], S->H[7]); +} + +static void +ed25519_hash(uint8_t *hash, const uint8_t *in, size_t inlen) { + ed25519_hash_context ctx; + ed25519_hash_init(&ctx); + ed25519_hash_update(&ctx, in, inlen); + ed25519_hash_final(&ctx, hash); +} + +#elif defined(ED25519_CUSTOMHASH) + +#include "ed25519-hash-custom.h" + +#else + +#include <openssl/sha.h> + +typedef SHA512_CTX ed25519_hash_context; + +static void +ed25519_hash_init(ed25519_hash_context *ctx) { + SHA512_Init(ctx); +} + +static void +ed25519_hash_update(ed25519_hash_context *ctx, const uint8_t *in, size_t inlen) { + SHA512_Update(ctx, in, inlen); +} + +static void +ed25519_hash_final(ed25519_hash_context *ctx, uint8_t *hash) { + SHA512_Final(hash, ctx); +} + +static void +ed25519_hash(uint8_t *hash, const uint8_t *in, size_t inlen) { + SHA512(in, inlen, hash); +} + +#endif + |