diff options
| -rw-r--r-- | scrypt.c | 94 |
1 files changed, 94 insertions, 0 deletions
@@ -466,6 +466,98 @@ PBKDF2_SHA256(const uint8_t * passwd, size_t passwdlen, const uint8_t * salt, /*****************************************************************************/ +#ifdef __ALTIVEC__ + +#include <altivec.h> +#include <vec_types.h> + +static void +blkcpy(void * dest, void * src, size_t len) +{ + vec_uint4 * D = dest; + vec_uint4 * S = src; + size_t L = len / sizeof(vec_uint4); + size_t i; + + for (i = 0; i < L; i++) + D[i] = S[i]; +} + +static void +blkxor(void * dest, void * src, size_t len) +{ + vec_uint4 * D = dest; + vec_uint4 * S = src; + size_t L = len / sizeof(vec_uint4); + size_t i; + + for (i = 0; i < L; i++) + D[i] = vec_xor(D[i], S[i]); +} + +/** + * salsa20_8(B): + * Apply the salsa20/8 core to the provided block. + */ +static void +salsa20_8(uint32_t B32[16]) +{ + vec_uint4 * B = (vec_uint4 *)&B32[0]; + vec_uint4 X0, X1, X2, X3; + vec_uint4 T; + size_t i; + + const vec_uchar16 perm_0x93 = { 12, 13, 14, 15, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; + const vec_uchar16 perm_0x4E = { 8, 9, 10, 11, 12, 13, 14, 15, 0, 1, 2, 3, 4, 5, 6, 7 }; + const vec_uchar16 perm_0x39 = { 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0, 1, 2, 3 }; + + X0 = B[0]; + X1 = B[1]; + X2 = B[2]; + X3 = B[3]; + + for (i = 0; i < 8; i += 2) { +#define R(a,b) vec_rl(a, vec_splats((uint32_t)b)) + /* Operate on "columns". */ + T = vec_add(X0, X3); + X1 = vec_xor(X1, R(T, 7)); + T = vec_add(X1, X0); + X2 = vec_xor(X2, R(T, 9)); + T = vec_add(X2, X1); + X3 = vec_xor(X3, R(T, 13)); + T = vec_add(X3, X2); + X0 = vec_xor(X0, R(T, 18)); + + /* Rearrange data. */ + X1 = vec_perm(X1, X1, perm_0x93); + X2 = vec_perm(X2, X2, perm_0x4E); + X3 = vec_perm(X3, X3, perm_0x39); + + /* Operate on "rows". */ + T = vec_add(X0, X1); + X3 = vec_xor(X3, R(T, 7)); + T = vec_add(X3, X0); + X2 = vec_xor(X2, R(T, 9)); + T = vec_add(X2, X3); + X1 = vec_xor(X1, R(T, 13)); + T = vec_add(X1, X2); + X0 = vec_xor(X0, R(T, 18)); + + /* Rearrange data. */ + X1 = vec_perm(X1, X1, perm_0x39); + X2 = vec_perm(X2, X2, perm_0x4E); + X3 = vec_perm(X3, X3, perm_0x93); +#undef R + } + + B[0] = vec_add(B[0], X0); + B[1] = vec_add(B[1], X1); + B[2] = vec_add(B[2], X2); + B[3] = vec_add(B[3], X3); +} + +#else + static void blkcpy(void * dest, void * src, size_t len) { @@ -534,6 +626,8 @@ salsa20_8(uint32_t B[16]) B[i] += x[i]; } +#endif + /** * blockmix_salsa8(Bin, Bout, X, r): * Compute Bout = BlockMix_{salsa20/8, r}(Bin). The input Bin must be 128r |