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Diffstat (limited to 'libs/libsodium/src/crypto_stream/chacha20/ref/chacha20_ref.c')
-rw-r--r--libs/libsodium/src/crypto_stream/chacha20/ref/chacha20_ref.c624
1 files changed, 312 insertions, 312 deletions
diff --git a/libs/libsodium/src/crypto_stream/chacha20/ref/chacha20_ref.c b/libs/libsodium/src/crypto_stream/chacha20/ref/chacha20_ref.c
index 40cccbf8f8..fb1e3a4b5c 100644
--- a/libs/libsodium/src/crypto_stream/chacha20/ref/chacha20_ref.c
+++ b/libs/libsodium/src/crypto_stream/chacha20/ref/chacha20_ref.c
@@ -1,312 +1,312 @@
-
-/*
- chacha-merged.c version 20080118
- D. J. Bernstein
- Public domain.
- */
-
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "core.h"
-#include "crypto_stream_chacha20.h"
-#include "private/common.h"
-#include "utils.h"
-
-#include "../stream_chacha20.h"
-#include "chacha20_ref.h"
-
-struct chacha_ctx {
- uint32_t input[16];
-};
-
-typedef struct chacha_ctx chacha_ctx;
-
-#define U32C(v) (v##U)
-
-#define U32V(v) ((uint32_t)(v) &U32C(0xFFFFFFFF))
-
-#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 void
-chacha_keysetup(chacha_ctx *ctx, const uint8_t *k)
-{
- ctx->input[0] = U32C(0x61707865);
- ctx->input[1] = U32C(0x3320646e);
- ctx->input[2] = U32C(0x79622d32);
- ctx->input[3] = U32C(0x6b206574);
- ctx->input[4] = LOAD32_LE(k + 0);
- ctx->input[5] = LOAD32_LE(k + 4);
- ctx->input[6] = LOAD32_LE(k + 8);
- ctx->input[7] = LOAD32_LE(k + 12);
- ctx->input[8] = LOAD32_LE(k + 16);
- ctx->input[9] = LOAD32_LE(k + 20);
- ctx->input[10] = LOAD32_LE(k + 24);
- ctx->input[11] = LOAD32_LE(k + 28);
-}
-
-static void
-chacha_ivsetup(chacha_ctx *ctx, const uint8_t *iv, const uint8_t *counter)
-{
- ctx->input[12] = counter == NULL ? 0 : LOAD32_LE(counter + 0);
- ctx->input[13] = counter == NULL ? 0 : LOAD32_LE(counter + 4);
- ctx->input[14] = LOAD32_LE(iv + 0);
- ctx->input[15] = LOAD32_LE(iv + 4);
-}
-
-static void
-chacha_ietf_ivsetup(chacha_ctx *ctx, const uint8_t *iv, const uint8_t *counter)
-{
- ctx->input[12] = counter == NULL ? 0 : LOAD32_LE(counter);
- ctx->input[13] = LOAD32_LE(iv + 0);
- ctx->input[14] = LOAD32_LE(iv + 4);
- ctx->input[15] = LOAD32_LE(iv + 8);
-}
-
-static void
-chacha20_encrypt_bytes(chacha_ctx *ctx, const uint8_t *m, uint8_t *c,
- unsigned long long bytes)
-{
- 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;
- uint8_t *ctarget = NULL;
- uint8_t tmp[64];
- unsigned int i;
-
- if (!bytes) {
- return; /* LCOV_EXCL_LINE */
- }
- j0 = ctx->input[0];
- j1 = ctx->input[1];
- j2 = ctx->input[2];
- j3 = ctx->input[3];
- j4 = ctx->input[4];
- j5 = ctx->input[5];
- j6 = ctx->input[6];
- j7 = ctx->input[7];
- j8 = ctx->input[8];
- j9 = ctx->input[9];
- j10 = ctx->input[10];
- j11 = ctx->input[11];
- j12 = ctx->input[12];
- j13 = ctx->input[13];
- j14 = ctx->input[14];
- j15 = ctx->input[15];
-
- for (;;) {
- if (bytes < 64) {
- memset(tmp, 0, 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, LOAD32_LE(m + 0));
- x1 = XOR(x1, LOAD32_LE(m + 4));
- x2 = XOR(x2, LOAD32_LE(m + 8));
- x3 = XOR(x3, LOAD32_LE(m + 12));
- x4 = XOR(x4, LOAD32_LE(m + 16));
- x5 = XOR(x5, LOAD32_LE(m + 20));
- x6 = XOR(x6, LOAD32_LE(m + 24));
- x7 = XOR(x7, LOAD32_LE(m + 28));
- x8 = XOR(x8, LOAD32_LE(m + 32));
- x9 = XOR(x9, LOAD32_LE(m + 36));
- x10 = XOR(x10, LOAD32_LE(m + 40));
- x11 = XOR(x11, LOAD32_LE(m + 44));
- x12 = XOR(x12, LOAD32_LE(m + 48));
- x13 = XOR(x13, LOAD32_LE(m + 52));
- x14 = XOR(x14, LOAD32_LE(m + 56));
- x15 = XOR(x15, LOAD32_LE(m + 60));
-
- j12 = PLUSONE(j12);
- /* LCOV_EXCL_START */
- if (!j12) {
- j13 = PLUSONE(j13);
- }
- /* LCOV_EXCL_STOP */
-
- STORE32_LE(c + 0, x0);
- STORE32_LE(c + 4, x1);
- STORE32_LE(c + 8, x2);
- STORE32_LE(c + 12, x3);
- STORE32_LE(c + 16, x4);
- STORE32_LE(c + 20, x5);
- STORE32_LE(c + 24, x6);
- STORE32_LE(c + 28, x7);
- STORE32_LE(c + 32, x8);
- STORE32_LE(c + 36, x9);
- STORE32_LE(c + 40, x10);
- STORE32_LE(c + 44, x11);
- STORE32_LE(c + 48, x12);
- STORE32_LE(c + 52, x13);
- STORE32_LE(c + 56, x14);
- STORE32_LE(c + 60, x15);
-
- if (bytes <= 64) {
- if (bytes < 64) {
- for (i = 0; i < (unsigned int) bytes; ++i) {
- ctarget[i] = c[i]; /* ctarget cannot be NULL */
- }
- }
- ctx->input[12] = j12;
- ctx->input[13] = j13;
-
- return;
- }
- bytes -= 64;
- c += 64;
- m += 64;
- }
-}
-
-static int
-stream_ref(unsigned char *c, unsigned long long clen, const unsigned char *n,
- const unsigned char *k)
-{
- struct chacha_ctx ctx;
-
- if (!clen) {
- return 0;
- }
- COMPILER_ASSERT(crypto_stream_chacha20_KEYBYTES == 256 / 8);
- chacha_keysetup(&ctx, k);
- chacha_ivsetup(&ctx, n, NULL);
- memset(c, 0, clen);
- chacha20_encrypt_bytes(&ctx, c, c, clen);
- sodium_memzero(&ctx, sizeof ctx);
-
- return 0;
-}
-
-static int
-stream_ietf_ext_ref(unsigned char *c, unsigned long long clen,
- const unsigned char *n, const unsigned char *k)
-{
- struct chacha_ctx ctx;
-
- if (!clen) {
- return 0;
- }
- COMPILER_ASSERT(crypto_stream_chacha20_KEYBYTES == 256 / 8);
- chacha_keysetup(&ctx, k);
- chacha_ietf_ivsetup(&ctx, n, NULL);
- memset(c, 0, clen);
- chacha20_encrypt_bytes(&ctx, c, c, clen);
- sodium_memzero(&ctx, sizeof ctx);
-
- return 0;
-}
-
-static int
-stream_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);
- STORE32_LE(&ic_bytes[0], ic_low);
- STORE32_LE(&ic_bytes[4], ic_high);
- chacha_keysetup(&ctx, k);
- chacha_ivsetup(&ctx, n, ic_bytes);
- chacha20_encrypt_bytes(&ctx, m, c, mlen);
- sodium_memzero(&ctx, sizeof ctx);
-
- return 0;
-}
-
-static int
-stream_ietf_ext_ref_xor_ic(unsigned char *c, const unsigned char *m,
- unsigned long long mlen, const unsigned char *n,
- uint32_t ic, const unsigned char *k)
-{
- struct chacha_ctx ctx;
- uint8_t ic_bytes[4];
-
- if (!mlen) {
- return 0;
- }
- STORE32_LE(ic_bytes, ic);
- chacha_keysetup(&ctx, k);
- chacha_ietf_ivsetup(&ctx, n, ic_bytes);
- chacha20_encrypt_bytes(&ctx, m, c, mlen);
- sodium_memzero(&ctx, sizeof ctx);
-
- return 0;
-}
-
-struct crypto_stream_chacha20_implementation
- crypto_stream_chacha20_ref_implementation = {
- SODIUM_C99(.stream =) stream_ref,
- SODIUM_C99(.stream_ietf_ext =) stream_ietf_ext_ref,
- SODIUM_C99(.stream_xor_ic =) stream_ref_xor_ic,
- SODIUM_C99(.stream_ietf_ext_xor_ic =) stream_ietf_ext_ref_xor_ic
- };
+
+/*
+ chacha-merged.c version 20080118
+ D. J. Bernstein
+ Public domain.
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "core.h"
+#include "crypto_stream_chacha20.h"
+#include "private/common.h"
+#include "utils.h"
+
+#include "../stream_chacha20.h"
+#include "chacha20_ref.h"
+
+struct chacha_ctx {
+ uint32_t input[16];
+};
+
+typedef struct chacha_ctx chacha_ctx;
+
+#define U32C(v) (v##U)
+
+#define U32V(v) ((uint32_t)(v) &U32C(0xFFFFFFFF))
+
+#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 void
+chacha_keysetup(chacha_ctx *ctx, const uint8_t *k)
+{
+ ctx->input[0] = U32C(0x61707865);
+ ctx->input[1] = U32C(0x3320646e);
+ ctx->input[2] = U32C(0x79622d32);
+ ctx->input[3] = U32C(0x6b206574);
+ ctx->input[4] = LOAD32_LE(k + 0);
+ ctx->input[5] = LOAD32_LE(k + 4);
+ ctx->input[6] = LOAD32_LE(k + 8);
+ ctx->input[7] = LOAD32_LE(k + 12);
+ ctx->input[8] = LOAD32_LE(k + 16);
+ ctx->input[9] = LOAD32_LE(k + 20);
+ ctx->input[10] = LOAD32_LE(k + 24);
+ ctx->input[11] = LOAD32_LE(k + 28);
+}
+
+static void
+chacha_ivsetup(chacha_ctx *ctx, const uint8_t *iv, const uint8_t *counter)
+{
+ ctx->input[12] = counter == NULL ? 0 : LOAD32_LE(counter + 0);
+ ctx->input[13] = counter == NULL ? 0 : LOAD32_LE(counter + 4);
+ ctx->input[14] = LOAD32_LE(iv + 0);
+ ctx->input[15] = LOAD32_LE(iv + 4);
+}
+
+static void
+chacha_ietf_ivsetup(chacha_ctx *ctx, const uint8_t *iv, const uint8_t *counter)
+{
+ ctx->input[12] = counter == NULL ? 0 : LOAD32_LE(counter);
+ ctx->input[13] = LOAD32_LE(iv + 0);
+ ctx->input[14] = LOAD32_LE(iv + 4);
+ ctx->input[15] = LOAD32_LE(iv + 8);
+}
+
+static void
+chacha20_encrypt_bytes(chacha_ctx *ctx, const uint8_t *m, uint8_t *c,
+ unsigned long long bytes)
+{
+ 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;
+ uint8_t *ctarget = NULL;
+ uint8_t tmp[64];
+ unsigned int i;
+
+ if (!bytes) {
+ return; /* LCOV_EXCL_LINE */
+ }
+ j0 = ctx->input[0];
+ j1 = ctx->input[1];
+ j2 = ctx->input[2];
+ j3 = ctx->input[3];
+ j4 = ctx->input[4];
+ j5 = ctx->input[5];
+ j6 = ctx->input[6];
+ j7 = ctx->input[7];
+ j8 = ctx->input[8];
+ j9 = ctx->input[9];
+ j10 = ctx->input[10];
+ j11 = ctx->input[11];
+ j12 = ctx->input[12];
+ j13 = ctx->input[13];
+ j14 = ctx->input[14];
+ j15 = ctx->input[15];
+
+ for (;;) {
+ if (bytes < 64) {
+ memset(tmp, 0, 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, LOAD32_LE(m + 0));
+ x1 = XOR(x1, LOAD32_LE(m + 4));
+ x2 = XOR(x2, LOAD32_LE(m + 8));
+ x3 = XOR(x3, LOAD32_LE(m + 12));
+ x4 = XOR(x4, LOAD32_LE(m + 16));
+ x5 = XOR(x5, LOAD32_LE(m + 20));
+ x6 = XOR(x6, LOAD32_LE(m + 24));
+ x7 = XOR(x7, LOAD32_LE(m + 28));
+ x8 = XOR(x8, LOAD32_LE(m + 32));
+ x9 = XOR(x9, LOAD32_LE(m + 36));
+ x10 = XOR(x10, LOAD32_LE(m + 40));
+ x11 = XOR(x11, LOAD32_LE(m + 44));
+ x12 = XOR(x12, LOAD32_LE(m + 48));
+ x13 = XOR(x13, LOAD32_LE(m + 52));
+ x14 = XOR(x14, LOAD32_LE(m + 56));
+ x15 = XOR(x15, LOAD32_LE(m + 60));
+
+ j12 = PLUSONE(j12);
+ /* LCOV_EXCL_START */
+ if (!j12) {
+ j13 = PLUSONE(j13);
+ }
+ /* LCOV_EXCL_STOP */
+
+ STORE32_LE(c + 0, x0);
+ STORE32_LE(c + 4, x1);
+ STORE32_LE(c + 8, x2);
+ STORE32_LE(c + 12, x3);
+ STORE32_LE(c + 16, x4);
+ STORE32_LE(c + 20, x5);
+ STORE32_LE(c + 24, x6);
+ STORE32_LE(c + 28, x7);
+ STORE32_LE(c + 32, x8);
+ STORE32_LE(c + 36, x9);
+ STORE32_LE(c + 40, x10);
+ STORE32_LE(c + 44, x11);
+ STORE32_LE(c + 48, x12);
+ STORE32_LE(c + 52, x13);
+ STORE32_LE(c + 56, x14);
+ STORE32_LE(c + 60, x15);
+
+ if (bytes <= 64) {
+ if (bytes < 64) {
+ for (i = 0; i < (unsigned int) bytes; ++i) {
+ ctarget[i] = c[i]; /* ctarget cannot be NULL */
+ }
+ }
+ ctx->input[12] = j12;
+ ctx->input[13] = j13;
+
+ return;
+ }
+ bytes -= 64;
+ c += 64;
+ m += 64;
+ }
+}
+
+static int
+stream_ref(unsigned char *c, unsigned long long clen, const unsigned char *n,
+ const unsigned char *k)
+{
+ struct chacha_ctx ctx;
+
+ if (!clen) {
+ return 0;
+ }
+ COMPILER_ASSERT(crypto_stream_chacha20_KEYBYTES == 256 / 8);
+ chacha_keysetup(&ctx, k);
+ chacha_ivsetup(&ctx, n, NULL);
+ memset(c, 0, clen);
+ chacha20_encrypt_bytes(&ctx, c, c, clen);
+ sodium_memzero(&ctx, sizeof ctx);
+
+ return 0;
+}
+
+static int
+stream_ietf_ext_ref(unsigned char *c, unsigned long long clen,
+ const unsigned char *n, const unsigned char *k)
+{
+ struct chacha_ctx ctx;
+
+ if (!clen) {
+ return 0;
+ }
+ COMPILER_ASSERT(crypto_stream_chacha20_KEYBYTES == 256 / 8);
+ chacha_keysetup(&ctx, k);
+ chacha_ietf_ivsetup(&ctx, n, NULL);
+ memset(c, 0, clen);
+ chacha20_encrypt_bytes(&ctx, c, c, clen);
+ sodium_memzero(&ctx, sizeof ctx);
+
+ return 0;
+}
+
+static int
+stream_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);
+ STORE32_LE(&ic_bytes[0], ic_low);
+ STORE32_LE(&ic_bytes[4], ic_high);
+ chacha_keysetup(&ctx, k);
+ chacha_ivsetup(&ctx, n, ic_bytes);
+ chacha20_encrypt_bytes(&ctx, m, c, mlen);
+ sodium_memzero(&ctx, sizeof ctx);
+
+ return 0;
+}
+
+static int
+stream_ietf_ext_ref_xor_ic(unsigned char *c, const unsigned char *m,
+ unsigned long long mlen, const unsigned char *n,
+ uint32_t ic, const unsigned char *k)
+{
+ struct chacha_ctx ctx;
+ uint8_t ic_bytes[4];
+
+ if (!mlen) {
+ return 0;
+ }
+ STORE32_LE(ic_bytes, ic);
+ chacha_keysetup(&ctx, k);
+ chacha_ietf_ivsetup(&ctx, n, ic_bytes);
+ chacha20_encrypt_bytes(&ctx, m, c, mlen);
+ sodium_memzero(&ctx, sizeof ctx);
+
+ return 0;
+}
+
+struct crypto_stream_chacha20_implementation
+ crypto_stream_chacha20_ref_implementation = {
+ SODIUM_C99(.stream =) stream_ref,
+ SODIUM_C99(.stream_ietf_ext =) stream_ietf_ext_ref,
+ SODIUM_C99(.stream_xor_ic =) stream_ref_xor_ic,
+ SODIUM_C99(.stream_ietf_ext_xor_ic =) stream_ietf_ext_ref_xor_ic
+ };
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-17 00:32:58 +0000