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Diffstat (limited to 'external_libs/python/pyzmq-14.7.0/bundled/libsodium/src/libsodium/crypto_stream/chacha20/ref/stream_chacha20_ref.c')
-rw-r--r--external_libs/python/pyzmq-14.7.0/bundled/libsodium/src/libsodium/crypto_stream/chacha20/ref/stream_chacha20_ref.c276
1 files changed, 0 insertions, 276 deletions
diff --git a/external_libs/python/pyzmq-14.7.0/bundled/libsodium/src/libsodium/crypto_stream/chacha20/ref/stream_chacha20_ref.c b/external_libs/python/pyzmq-14.7.0/bundled/libsodium/src/libsodium/crypto_stream/chacha20/ref/stream_chacha20_ref.c
deleted file mode 100644
index 967015f2..00000000
--- a/external_libs/python/pyzmq-14.7.0/bundled/libsodium/src/libsodium/crypto_stream/chacha20/ref/stream_chacha20_ref.c
+++ /dev/null
@@ -1,276 +0,0 @@
-
-/* $OpenBSD: chacha.c,v 1.1 2013/11/21 00:45:44 djm Exp $ */
-
-/*
- chacha-merged.c version 20080118
- D. J. Bernstein
- Public domain.
- */
-
-#include <stdint.h>
-#include <string.h>
-
-#include "api.h"
-#include "crypto_stream_chacha20.h"
-#include "utils.h"
-
-struct chacha_ctx {
- uint32_t input[16];
-};
-
-typedef uint8_t u8;
-typedef uint32_t u32;
-
-typedef struct chacha_ctx chacha_ctx;
-
-#define U8C(v) (v##U)
-#define U32C(v) (v##U)
-
-#define U8V(v) ((u8)(v) & U8C(0xFF))
-#define U32V(v) ((u32)(v) & U32C(0xFFFFFFFF))
-
-#define ROTL32(v, n) \
- (U32V((v) << (n)) | ((v) >> (32 - (n))))
-
-#define U8TO32_LITTLE(p) \
- (((u32)((p)[0]) ) | \
- ((u32)((p)[1]) << 8) | \
- ((u32)((p)[2]) << 16) | \
- ((u32)((p)[3]) << 24))
-
-#define U32TO8_LITTLE(p, v) \
- do { \
- (p)[0] = U8V((v) ); \
- (p)[1] = U8V((v) >> 8); \
- (p)[2] = U8V((v) >> 16); \
- (p)[3] = U8V((v) >> 24); \
- } while (0)
-
-#define ROTATE(v,c) (ROTL32(v,c))
-#define XOR(v,w) ((v) ^ (w))
-#define PLUS(v,w) (U32V((v) + (w)))
-#define PLUSONE(v) (PLUS((v),1))
-
-#define QUARTERROUND(a,b,c,d) \
- a = PLUS(a,b); d = ROTATE(XOR(d,a),16); \
- c = PLUS(c,d); b = ROTATE(XOR(b,c),12); \
- a = PLUS(a,b); d = ROTATE(XOR(d,a), 8); \
- c = PLUS(c,d); b = ROTATE(XOR(b,c), 7);
-
-static const unsigned char sigma[16] = {
- 'e', 'x', 'p', 'a', 'n', 'd', ' ', '3', '2', '-', 'b', 'y', 't', 'e', ' ', 'k'
-};
-
-static void
-chacha_keysetup(chacha_ctx *x, const u8 *k)
-{
- const unsigned char *constants;
-
- x->input[4] = U8TO32_LITTLE(k + 0);
- x->input[5] = U8TO32_LITTLE(k + 4);
- x->input[6] = U8TO32_LITTLE(k + 8);
- x->input[7] = U8TO32_LITTLE(k + 12);
- k += 16;
- constants = sigma;
- x->input[8] = U8TO32_LITTLE(k + 0);
- x->input[9] = U8TO32_LITTLE(k + 4);
- x->input[10] = U8TO32_LITTLE(k + 8);
- x->input[11] = U8TO32_LITTLE(k + 12);
- x->input[0] = U8TO32_LITTLE(constants + 0);
- x->input[1] = U8TO32_LITTLE(constants + 4);
- x->input[2] = U8TO32_LITTLE(constants + 8);
- x->input[3] = U8TO32_LITTLE(constants + 12);
-}
-
-static void
-chacha_ivsetup(chacha_ctx *x, const u8 *iv, const u8 *counter)
-{
- x->input[12] = counter == NULL ? 0 : U8TO32_LITTLE(counter + 0);
- x->input[13] = counter == NULL ? 0 : U8TO32_LITTLE(counter + 4);
- x->input[14] = U8TO32_LITTLE(iv + 0);
- x->input[15] = U8TO32_LITTLE(iv + 4);
-}
-
-static void
-chacha_encrypt_bytes(chacha_ctx *x, const u8 *m, u8 *c, unsigned long long bytes)
-{
- u32 x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15;
- u32 j0, j1, j2, j3, j4, j5, j6, j7, j8, j9, j10, j11, j12, j13, j14, j15;
- u8 *ctarget = NULL;
- u8 tmp[64];
- unsigned int i;
-
- if (!bytes) {
- return; /* LCOV_EXCL_LINE */
- }
- j0 = x->input[0];
- j1 = x->input[1];
- j2 = x->input[2];
- j3 = x->input[3];
- j4 = x->input[4];
- j5 = x->input[5];
- j6 = x->input[6];
- j7 = x->input[7];
- j8 = x->input[8];
- j9 = x->input[9];
- j10 = x->input[10];
- j11 = x->input[11];
- j12 = x->input[12];
- j13 = x->input[13];
- j14 = x->input[14];
- j15 = x->input[15];
-
- for (;;) {
- if (bytes < 64) {
- for (i = 0; i < bytes; ++i) {
- tmp[i] = m[i];
- }
- m = tmp;
- ctarget = c;
- c = tmp;
- }
- x0 = j0;
- x1 = j1;
- x2 = j2;
- x3 = j3;
- x4 = j4;
- x5 = j5;
- x6 = j6;
- x7 = j7;
- x8 = j8;
- x9 = j9;
- x10 = j10;
- x11 = j11;
- x12 = j12;
- x13 = j13;
- x14 = j14;
- x15 = j15;
- for (i = 20; i > 0; i -= 2) {
- QUARTERROUND(x0, x4, x8, x12)
- QUARTERROUND(x1, x5, x9, x13)
- QUARTERROUND(x2, x6, x10, x14)
- QUARTERROUND(x3, x7, x11, x15)
- QUARTERROUND(x0, x5, x10, x15)
- QUARTERROUND(x1, x6, x11, x12)
- QUARTERROUND(x2, x7, x8, x13)
- QUARTERROUND(x3, x4, x9, x14)
- }
- x0 = PLUS(x0, j0);
- x1 = PLUS(x1, j1);
- x2 = PLUS(x2, j2);
- x3 = PLUS(x3, j3);
- x4 = PLUS(x4, j4);
- x5 = PLUS(x5, j5);
- x6 = PLUS(x6, j6);
- x7 = PLUS(x7, j7);
- x8 = PLUS(x8, j8);
- x9 = PLUS(x9, j9);
- x10 = PLUS(x10, j10);
- x11 = PLUS(x11, j11);
- x12 = PLUS(x12, j12);
- x13 = PLUS(x13, j13);
- x14 = PLUS(x14, j14);
- x15 = PLUS(x15, j15);
-
- x0 = XOR(x0, U8TO32_LITTLE(m + 0));
- x1 = XOR(x1, U8TO32_LITTLE(m + 4));
- x2 = XOR(x2, U8TO32_LITTLE(m + 8));
- x3 = XOR(x3, U8TO32_LITTLE(m + 12));
- x4 = XOR(x4, U8TO32_LITTLE(m + 16));
- x5 = XOR(x5, U8TO32_LITTLE(m + 20));
- x6 = XOR(x6, U8TO32_LITTLE(m + 24));
- x7 = XOR(x7, U8TO32_LITTLE(m + 28));
- x8 = XOR(x8, U8TO32_LITTLE(m + 32));
- x9 = XOR(x9, U8TO32_LITTLE(m + 36));
- x10 = XOR(x10, U8TO32_LITTLE(m + 40));
- x11 = XOR(x11, U8TO32_LITTLE(m + 44));
- x12 = XOR(x12, U8TO32_LITTLE(m + 48));
- x13 = XOR(x13, U8TO32_LITTLE(m + 52));
- x14 = XOR(x14, U8TO32_LITTLE(m + 56));
- x15 = XOR(x15, U8TO32_LITTLE(m + 60));
-
- j12 = PLUSONE(j12);
- /* LCOV_EXCL_START */
- if (!j12) {
- j13 = PLUSONE(j13);
- }
- /* LCOV_EXCL_STOP */
-
- U32TO8_LITTLE(c + 0, x0);
- U32TO8_LITTLE(c + 4, x1);
- U32TO8_LITTLE(c + 8, x2);
- U32TO8_LITTLE(c + 12, x3);
- U32TO8_LITTLE(c + 16, x4);
- U32TO8_LITTLE(c + 20, x5);
- U32TO8_LITTLE(c + 24, x6);
- U32TO8_LITTLE(c + 28, x7);
- U32TO8_LITTLE(c + 32, x8);
- U32TO8_LITTLE(c + 36, x9);
- U32TO8_LITTLE(c + 40, x10);
- U32TO8_LITTLE(c + 44, x11);
- U32TO8_LITTLE(c + 48, x12);
- U32TO8_LITTLE(c + 52, x13);
- U32TO8_LITTLE(c + 56, x14);
- U32TO8_LITTLE(c + 60, x15);
-
- if (bytes <= 64) {
- if (bytes < 64) {
- for (i = 0; i < (unsigned int) bytes; ++i) {
- ctarget[i] = c[i];
- }
- }
- x->input[12] = j12;
- x->input[13] = j13;
- return;
- }
- bytes -= 64;
- c += 64;
- m += 64;
- }
-}
-
-int
-crypto_stream_chacha20_ref(unsigned char *c, unsigned long long clen,
- const unsigned char *n, const unsigned char *k)
-{
- struct chacha_ctx ctx;
-
- if (!clen) {
- return 0;
- }
- (void) sizeof(int[crypto_stream_chacha20_KEYBYTES == 256 / 8 ? 1 : -1]);
- chacha_keysetup(&ctx, k);
- chacha_ivsetup(&ctx, n, NULL);
- memset(c, 0, clen);
- chacha_encrypt_bytes(&ctx, c, c, clen);
- sodium_memzero(&ctx, sizeof ctx);
-
- return 0;
-}
-
-int
-crypto_stream_chacha20_ref_xor_ic(unsigned char *c, const unsigned char *m,
- unsigned long long mlen,
- const unsigned char *n, uint64_t ic,
- const unsigned char *k)
-{
- struct chacha_ctx ctx;
- uint8_t ic_bytes[8];
- uint32_t ic_high;
- uint32_t ic_low;
-
- if (!mlen) {
- return 0;
- }
- ic_high = U32V(ic >> 32);
- ic_low = U32V(ic);
- U32TO8_LITTLE(&ic_bytes[0], ic_low);
- U32TO8_LITTLE(&ic_bytes[4], ic_high);
- chacha_keysetup(&ctx, k);
- chacha_ivsetup(&ctx, n, ic_bytes);
- chacha_encrypt_bytes(&ctx, m, c, mlen);
- sodium_memzero(&ctx, sizeof ctx);
- sodium_memzero(ic_bytes, sizeof ic_bytes);
-
- return 0;
-}