summaryrefslogtreecommitdiff
path: root/code/core/crypto/chacha/chacha-merged.c
diff options
context:
space:
mode:
Diffstat (limited to 'code/core/crypto/chacha/chacha-merged.c')
-rw-r--r--code/core/crypto/chacha/chacha-merged.c270
1 files changed, 0 insertions, 270 deletions
diff --git a/code/core/crypto/chacha/chacha-merged.c b/code/core/crypto/chacha/chacha-merged.c
deleted file mode 100644
index 557dfd5..0000000
--- a/code/core/crypto/chacha/chacha-merged.c
+++ /dev/null
@@ -1,270 +0,0 @@
-/* $OpenBSD: chacha-merged.c,v 1.7 2014/07/11 08:47:47 bcook Exp $ */
-/*
-chacha-merged.c version 20080118
-D. J. Bernstein
-Public domain.
-*/
-
-#include <sys/types.h>
-
-#include <stdint.h>
-
-#define CHACHA_MINKEYLEN 16
-#define CHACHA_NONCELEN 8
-#define CHACHA_CTRLEN 8
-#define CHACHA_STATELEN (CHACHA_NONCELEN+CHACHA_CTRLEN)
-#define CHACHA_BLOCKLEN 64
-
-struct chacha_ctx {
- u_int input[16];
- uint8_t ks[CHACHA_BLOCKLEN];
- uint8_t unused;
-};
-
-static inline void chacha_keysetup(struct chacha_ctx *x, const u_char *k,
- u_int kbits)
- __attribute__((__bounded__(__minbytes__, 2, CHACHA_MINKEYLEN)));
-static inline void chacha_ivsetup(struct chacha_ctx *x, const u_char *iv,
- const u_char *ctr)
- __attribute__((__bounded__(__minbytes__, 2, CHACHA_NONCELEN)))
- __attribute__((__bounded__(__minbytes__, 3, CHACHA_CTRLEN)));
-static inline void chacha_encrypt_bytes(struct chacha_ctx *x, const u_char *m,
- u_char *c, u_int bytes)
- __attribute__((__bounded__(__buffer__, 2, 4)))
- __attribute__((__bounded__(__buffer__, 3, 4)));
-
-typedef unsigned char u8;
-typedef unsigned int 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 char sigma[16] = "expand 32-byte k";
-static const char tau[16] = "expand 16-byte k";
-
-static inline void
-chacha_keysetup(chacha_ctx *x, const u8 *k, u32 kbits)
-{
- const 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);
- if (kbits == 256) { /* recommended */
- k += 16;
- constants = sigma;
- } else { /* kbits == 128 */
- constants = tau;
- }
- 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 inline 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 inline void
-chacha_encrypt_bytes(chacha_ctx *x, const u8 *m, u8 *c, u32 bytes)
-{
- u32 x0, x1, x2, x3, x4, x5, x6, x7;
- u32 x8, x9, x10, x11, x12, x13, x14, x15;
- u32 j0, j1, j2, j3, j4, j5, j6, j7;
- u32 j8, j9, j10, j11, j12, j13, j14, j15;
- u8 *ctarget = NULL;
- u8 tmp[64];
- u_int i;
-
- if (!bytes)
- return;
-
- 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);
-
- if (bytes < 64) {
- U32TO8_LITTLE(x->ks + 0, x0);
- U32TO8_LITTLE(x->ks + 4, x1);
- U32TO8_LITTLE(x->ks + 8, x2);
- U32TO8_LITTLE(x->ks + 12, x3);
- U32TO8_LITTLE(x->ks + 16, x4);
- U32TO8_LITTLE(x->ks + 20, x5);
- U32TO8_LITTLE(x->ks + 24, x6);
- U32TO8_LITTLE(x->ks + 28, x7);
- U32TO8_LITTLE(x->ks + 32, x8);
- U32TO8_LITTLE(x->ks + 36, x9);
- U32TO8_LITTLE(x->ks + 40, x10);
- U32TO8_LITTLE(x->ks + 44, x11);
- U32TO8_LITTLE(x->ks + 48, x12);
- U32TO8_LITTLE(x->ks + 52, x13);
- U32TO8_LITTLE(x->ks + 56, x14);
- U32TO8_LITTLE(x->ks + 60, x15);
- }
-
- 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);
- if (!j12) {
- j13 = PLUSONE(j13);
- /*
- * Stopping at 2^70 bytes per nonce is the user's
- * responsibility.
- */
- }
-
- 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 < bytes; ++i)
- ctarget[i] = c[i];
- }
- x->input[12] = j12;
- x->input[13] = j13;
- x->unused = 64 - bytes;
- return;
- }
- bytes -= 64;
- c += 64;
- m += 64;
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 15:02:52 +0000