mirror of
https://github.com/oxen-io/lokinet.git
synced 2024-11-03 23:15:52 +00:00
126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
|
|
#include <sodium/crypto_core_salsa20.h>
|
|
#include <sodium/private/common.h>
|
|
|
|
static void
|
|
crypto_core_salsa(unsigned char *out, const unsigned char *in,
|
|
const unsigned char *k, const unsigned char *c,
|
|
const int rounds)
|
|
{
|
|
uint32_t x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14,
|
|
x15;
|
|
uint32_t j0, j1, j2, j3, j4, j5, j6, j7, j8, j9, j10, j11, j12, j13, j14,
|
|
j15;
|
|
int i;
|
|
|
|
j0 = x0 = 0x61707865;
|
|
j5 = x5 = 0x3320646e;
|
|
j10 = x10 = 0x79622d32;
|
|
j15 = x15 = 0x6b206574;
|
|
if (c != NULL) {
|
|
j0 = x0 = LOAD32_LE(c + 0);
|
|
j5 = x5 = LOAD32_LE(c + 4);
|
|
j10 = x10 = LOAD32_LE(c + 8);
|
|
j15 = x15 = LOAD32_LE(c + 12);
|
|
}
|
|
j1 = x1 = LOAD32_LE(k + 0);
|
|
j2 = x2 = LOAD32_LE(k + 4);
|
|
j3 = x3 = LOAD32_LE(k + 8);
|
|
j4 = x4 = LOAD32_LE(k + 12);
|
|
j11 = x11 = LOAD32_LE(k + 16);
|
|
j12 = x12 = LOAD32_LE(k + 20);
|
|
j13 = x13 = LOAD32_LE(k + 24);
|
|
j14 = x14 = LOAD32_LE(k + 28);
|
|
|
|
j6 = x6 = LOAD32_LE(in + 0);
|
|
j7 = x7 = LOAD32_LE(in + 4);
|
|
j8 = x8 = LOAD32_LE(in + 8);
|
|
j9 = x9 = LOAD32_LE(in + 12);
|
|
|
|
for (i = 0; i < rounds; i += 2) {
|
|
x4 ^= ROTL32(x0 + x12, 7);
|
|
x8 ^= ROTL32(x4 + x0, 9);
|
|
x12 ^= ROTL32(x8 + x4, 13);
|
|
x0 ^= ROTL32(x12 + x8, 18);
|
|
x9 ^= ROTL32(x5 + x1, 7);
|
|
x13 ^= ROTL32(x9 + x5, 9);
|
|
x1 ^= ROTL32(x13 + x9, 13);
|
|
x5 ^= ROTL32(x1 + x13, 18);
|
|
x14 ^= ROTL32(x10 + x6, 7);
|
|
x2 ^= ROTL32(x14 + x10, 9);
|
|
x6 ^= ROTL32(x2 + x14, 13);
|
|
x10 ^= ROTL32(x6 + x2, 18);
|
|
x3 ^= ROTL32(x15 + x11, 7);
|
|
x7 ^= ROTL32(x3 + x15, 9);
|
|
x11 ^= ROTL32(x7 + x3, 13);
|
|
x15 ^= ROTL32(x11 + x7, 18);
|
|
x1 ^= ROTL32(x0 + x3, 7);
|
|
x2 ^= ROTL32(x1 + x0, 9);
|
|
x3 ^= ROTL32(x2 + x1, 13);
|
|
x0 ^= ROTL32(x3 + x2, 18);
|
|
x6 ^= ROTL32(x5 + x4, 7);
|
|
x7 ^= ROTL32(x6 + x5, 9);
|
|
x4 ^= ROTL32(x7 + x6, 13);
|
|
x5 ^= ROTL32(x4 + x7, 18);
|
|
x11 ^= ROTL32(x10 + x9, 7);
|
|
x8 ^= ROTL32(x11 + x10, 9);
|
|
x9 ^= ROTL32(x8 + x11, 13);
|
|
x10 ^= ROTL32(x9 + x8, 18);
|
|
x12 ^= ROTL32(x15 + x14, 7);
|
|
x13 ^= ROTL32(x12 + x15, 9);
|
|
x14 ^= ROTL32(x13 + x12, 13);
|
|
x15 ^= ROTL32(x14 + x13, 18);
|
|
}
|
|
STORE32_LE(out + 0, x0 + j0);
|
|
STORE32_LE(out + 4, x1 + j1);
|
|
STORE32_LE(out + 8, x2 + j2);
|
|
STORE32_LE(out + 12, x3 + j3);
|
|
STORE32_LE(out + 16, x4 + j4);
|
|
STORE32_LE(out + 20, x5 + j5);
|
|
STORE32_LE(out + 24, x6 + j6);
|
|
STORE32_LE(out + 28, x7 + j7);
|
|
STORE32_LE(out + 32, x8 + j8);
|
|
STORE32_LE(out + 36, x9 + j9);
|
|
STORE32_LE(out + 40, x10 + j10);
|
|
STORE32_LE(out + 44, x11 + j11);
|
|
STORE32_LE(out + 48, x12 + j12);
|
|
STORE32_LE(out + 52, x13 + j13);
|
|
STORE32_LE(out + 56, x14 + j14);
|
|
STORE32_LE(out + 60, x15 + j15);
|
|
}
|
|
|
|
int
|
|
crypto_core_salsa20(unsigned char *out, const unsigned char *in,
|
|
const unsigned char *k, const unsigned char *c)
|
|
{
|
|
crypto_core_salsa(out, in, k, c, 20);
|
|
return 0;
|
|
}
|
|
|
|
size_t
|
|
crypto_core_salsa20_outputbytes(void)
|
|
{
|
|
return crypto_core_salsa20_OUTPUTBYTES;
|
|
}
|
|
|
|
size_t
|
|
crypto_core_salsa20_inputbytes(void)
|
|
{
|
|
return crypto_core_salsa20_INPUTBYTES;
|
|
}
|
|
|
|
size_t
|
|
crypto_core_salsa20_keybytes(void)
|
|
{
|
|
return crypto_core_salsa20_KEYBYTES;
|
|
}
|
|
|
|
size_t
|
|
crypto_core_salsa20_constbytes(void)
|
|
{
|
|
return crypto_core_salsa20_CONSTBYTES;
|
|
}
|