5830 want arc4random(3C) suite

5802 want getentropy(3C)
5803 want getrandom(2)
5804 want explicit_bzero(3C)
5805 want MC_INHERIT_ZERO
5806 uuid_generate can leak its cache in edge conditions
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: Joshua M. Clulow <josh@sysmgr.org>
Reviewed by: Josef 'Jeff' Sipek <josef.sipek@nexenta.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Approved by: Garrett D'Amore <garrett@damore.org>

2 files changed, 271 insertions, 0 deletions

diff --git a/usr/src/common/crypto/chacha/chacha.c b/usr/src/common/crypto/chacha/chacha.c
new file mode 100644
index 0000000000..5f9ef3b411
--- /dev/null
+++ b/usr/src/common/crypto/chacha/chacha.c
@@ -0,0 +1,221 @@
+/*
+chacha-merged.c version 20080118
+D. J. Bernstein
+Public domain.
+*/
+
+/* $OpenBSD: chacha_private.h,v 1.2 2013/10/04 07:02:27 djm Exp $ */
+
+#include <chacha.h>
+#include <stddef.h>
+
+typedef unsigned char u8;
+typedef unsigned int u32;
+typedef unsigned int u_int;
+
+#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";
+
+void
+chacha_keysetup(chacha_ctx_t *x,const u8 *k,u32 kbits,u32 ivbits)
+{
+  const char *constants;
+
+  x->chacha_input[4] = U8TO32_LITTLE(k + 0);
+  x->chacha_input[5] = U8TO32_LITTLE(k + 4);
+  x->chacha_input[6] = U8TO32_LITTLE(k + 8);
+  x->chacha_input[7] = U8TO32_LITTLE(k + 12);
+  if (kbits == 256) { /* recommended */
+    k += 16;
+    constants = sigma;
+  } else { /* kbits == 128 */
+    constants = tau;
+  }
+  x->chacha_input[8] = U8TO32_LITTLE(k + 0);
+  x->chacha_input[9] = U8TO32_LITTLE(k + 4);
+  x->chacha_input[10] = U8TO32_LITTLE(k + 8);
+  x->chacha_input[11] = U8TO32_LITTLE(k + 12);
+  x->chacha_input[0] = U8TO32_LITTLE(constants + 0);
+  x->chacha_input[1] = U8TO32_LITTLE(constants + 4);
+  x->chacha_input[2] = U8TO32_LITTLE(constants + 8);
+  x->chacha_input[3] = U8TO32_LITTLE(constants + 12);
+}
+
+void
+chacha_ivsetup(chacha_ctx_t *x,const u8 *iv)
+{
+  x->chacha_input[12] = 0;
+  x->chacha_input[13] = 0;
+  x->chacha_input[14] = U8TO32_LITTLE(iv + 0);
+  x->chacha_input[15] = U8TO32_LITTLE(iv + 4);
+}
+
+void
+chacha_encrypt_bytes(chacha_ctx_t *x,const u8 *m,u8 *c,u32 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];
+  u_int i;
+
+  if (!bytes) return;
+
+  j0 = x->chacha_input[0];
+  j1 = x->chacha_input[1];
+  j2 = x->chacha_input[2];
+  j3 = x->chacha_input[3];
+  j4 = x->chacha_input[4];
+  j5 = x->chacha_input[5];
+  j6 = x->chacha_input[6];
+  j7 = x->chacha_input[7];
+  j8 = x->chacha_input[8];
+  j9 = x->chacha_input[9];
+  j10 = x->chacha_input[10];
+  j11 = x->chacha_input[11];
+  j12 = x->chacha_input[12];
+  j13 = x->chacha_input[13];
+  j14 = x->chacha_input[14];
+  j15 = x->chacha_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);
+
+#ifndef KEYSTREAM_ONLY
+    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));
+#endif
+
+    j12 = PLUSONE(j12);
+    if (!j12) {
+      j13 = PLUSONE(j13);
+      /* stopping at 2^70 bytes per nonce is 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->chacha_input[12] = j12;
+      x->chacha_input[13] = j13;
+      return;
+    }
+    bytes -= 64;
+    c += 64;
+#ifndef KEYSTREAM_ONLY
+    m += 64;
+#endif
+  }
+}
diff --git a/usr/src/common/crypto/chacha/chacha.h b/usr/src/common/crypto/chacha/chacha.h
new file mode 100644
index 0000000000..ac9993a8a4
--- /dev/null
+++ b/usr/src/common/crypto/chacha/chacha.h
@@ -0,0 +1,50 @@
+/*
+ * This file and its contents are supplied under the terms of the
+ * Common Development and Distribution License ("CDDL"), version 1.0.
+ * You may only use this file in accordance with the terms of version
+ * 1.0 of the CDDL.
+ *
+ * A full copy of the text of the CDDL should have accompanied this
+ * source.  A copy of the CDDL is also available via the Internet at
+ * http://www.illumos.org/license/CDDL.
+ */
+
+/*
+ * Copyright (c) 2015, Joyent, Inc.
+ */
+
+#ifndef _CHACHA_H
+#define	_CHACHA_H
+
+/*
+ * ChaCha cipher implementation header
+ *
+ * Note, the chacha C files that we have, have a compile time option for
+ * generating a keystream only. eg. in other words -DKEYSTREAM_ONLY. If using
+ * chacha, for something like arc4random, where you aren't doing encryption,
+ * then you should pass -DKEYSTREAM_ONLY. If encryption is being done, then it
+ * should not be defined. The main difference is basically doing another pass
+ * over the data and xoring it with the generated cipher.
+ */
+
+#include <inttypes.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct chacha_ctx {
+	uint32_t chacha_input[16];
+} chacha_ctx_t;
+
+extern void chacha_keysetup(chacha_ctx_t *, const uint8_t *, uint32_t,
+    uint32_t);
+extern void chacha_ivsetup(chacha_ctx_t *, const uint8_t *);
+extern void chacha_encrypt_bytes(chacha_ctx_t *, const uint8_t *, uint8_t *,
+    uint32_t);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _CHACHA_H */