preparing to build tox from sources

1 files changed, 315 insertions, 0 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
new file mode 100644
index 0000000000..f88a99dbdf
--- /dev/null
+++ b/libs/libsodium/src/crypto_stream/chacha20/ref/chacha20_ref.c
@@ -0,0 +1,315 @@
+
+/*
+ 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 */
+    }
+    if (bytes > crypto_stream_chacha20_MESSAGEBYTES_MAX) {
+        sodium_misuse();
+    }
+    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_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_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 =) stream_ietf_ref,
+        SODIUM_C99(.stream_xor_ic =) stream_ref_xor_ic,
+        SODIUM_C99(.stream_ietf_xor_ic =) stream_ietf_ref_xor_ic
+    };