Reintegrate tools from trunk

1 files changed, 269 insertions, 0 deletions

diff --git a/tools/plink/sshsh256.c b/tools/plink/sshsh256.c
new file mode 100644
index 000000000..538982a89
--- /dev/null
+++ b/tools/plink/sshsh256.c
@@ -0,0 +1,269 @@
+/*

+ * SHA-256 algorithm as described at

+ * 

+ *   http://csrc.nist.gov/cryptval/shs.html

+ */

+

+#include "ssh.h"

+

+/* ----------------------------------------------------------------------

+ * Core SHA256 algorithm: processes 16-word blocks into a message digest.

+ */

+

+#define ror(x,y) ( ((x) << (32-y)) | (((uint32)(x)) >> (y)) )

+#define shr(x,y) ( (((uint32)(x)) >> (y)) )

+#define Ch(x,y,z) ( ((x) & (y)) ^ (~(x) & (z)) )

+#define Maj(x,y,z) ( ((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)) )

+#define bigsigma0(x) ( ror((x),2) ^ ror((x),13) ^ ror((x),22) )

+#define bigsigma1(x) ( ror((x),6) ^ ror((x),11) ^ ror((x),25) )

+#define smallsigma0(x) ( ror((x),7) ^ ror((x),18) ^ shr((x),3) )

+#define smallsigma1(x) ( ror((x),17) ^ ror((x),19) ^ shr((x),10) )

+

+void SHA256_Core_Init(SHA256_State *s) {

+    s->h[0] = 0x6a09e667;

+    s->h[1] = 0xbb67ae85;

+    s->h[2] = 0x3c6ef372;

+    s->h[3] = 0xa54ff53a;

+    s->h[4] = 0x510e527f;

+    s->h[5] = 0x9b05688c;

+    s->h[6] = 0x1f83d9ab;

+    s->h[7] = 0x5be0cd19;

+}

+

+void SHA256_Block(SHA256_State *s, uint32 *block) {

+    uint32 w[80];

+    uint32 a,b,c,d,e,f,g,h;

+    static const int k[] = {

+        0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,

+        0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,

+        0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,

+        0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,

+        0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,

+        0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,

+        0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,

+        0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,

+        0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,

+        0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,

+        0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,

+        0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,

+        0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,

+        0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,

+        0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,

+        0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2,

+    };

+

+    int t;

+

+    for (t = 0; t < 16; t++)

+        w[t] = block[t];

+

+    for (t = 16; t < 64; t++)

+	w[t] = smallsigma1(w[t-2]) + w[t-7] + smallsigma0(w[t-15]) + w[t-16];

+

+    a = s->h[0]; b = s->h[1]; c = s->h[2]; d = s->h[3];

+    e = s->h[4]; f = s->h[5]; g = s->h[6]; h = s->h[7];

+

+    for (t = 0; t < 64; t+=8) {

+        uint32 t1, t2;

+

+#define ROUND(j,a,b,c,d,e,f,g,h) \

+	t1 = h + bigsigma1(e) + Ch(e,f,g) + k[j] + w[j]; \

+	t2 = bigsigma0(a) + Maj(a,b,c); \

+        d = d + t1; h = t1 + t2;

+

+	ROUND(t+0, a,b,c,d,e,f,g,h);

+	ROUND(t+1, h,a,b,c,d,e,f,g);

+	ROUND(t+2, g,h,a,b,c,d,e,f);

+	ROUND(t+3, f,g,h,a,b,c,d,e);

+	ROUND(t+4, e,f,g,h,a,b,c,d);

+	ROUND(t+5, d,e,f,g,h,a,b,c);

+	ROUND(t+6, c,d,e,f,g,h,a,b);

+	ROUND(t+7, b,c,d,e,f,g,h,a);

+    }

+

+    s->h[0] += a; s->h[1] += b; s->h[2] += c; s->h[3] += d;

+    s->h[4] += e; s->h[5] += f; s->h[6] += g; s->h[7] += h;

+}

+

+/* ----------------------------------------------------------------------

+ * Outer SHA256 algorithm: take an arbitrary length byte string,

+ * convert it into 16-word blocks with the prescribed padding at

+ * the end, and pass those blocks to the core SHA256 algorithm.

+ */

+

+#define BLKSIZE 64

+

+void SHA256_Init(SHA256_State *s) {

+    SHA256_Core_Init(s);

+    s->blkused = 0;

+    s->lenhi = s->lenlo = 0;

+}

+

+void SHA256_Bytes(SHA256_State *s, const void *p, int len) {

+    unsigned char *q = (unsigned char *)p;

+    uint32 wordblock[16];

+    uint32 lenw = len;

+    int i;

+

+    /*

+     * Update the length field.

+     */

+    s->lenlo += lenw;

+    s->lenhi += (s->lenlo < lenw);

+

+    if (s->blkused && s->blkused+len < BLKSIZE) {

+        /*

+         * Trivial case: just add to the block.

+         */

+        memcpy(s->block + s->blkused, q, len);

+        s->blkused += len;

+    } else {

+        /*

+         * We must complete and process at least one block.

+         */

+        while (s->blkused + len >= BLKSIZE) {

+            memcpy(s->block + s->blkused, q, BLKSIZE - s->blkused);

+            q += BLKSIZE - s->blkused;

+            len -= BLKSIZE - s->blkused;

+            /* Now process the block. Gather bytes big-endian into words */

+            for (i = 0; i < 16; i++) {

+                wordblock[i] =

+                    ( ((uint32)s->block[i*4+0]) << 24 ) |

+                    ( ((uint32)s->block[i*4+1]) << 16 ) |

+                    ( ((uint32)s->block[i*4+2]) <<  8 ) |

+                    ( ((uint32)s->block[i*4+3]) <<  0 );

+            }

+            SHA256_Block(s, wordblock);

+            s->blkused = 0;

+        }

+        memcpy(s->block, q, len);

+        s->blkused = len;

+    }

+}

+

+void SHA256_Final(SHA256_State *s, unsigned char *digest) {

+    int i;

+    int pad;

+    unsigned char c[64];

+    uint32 lenhi, lenlo;

+

+    if (s->blkused >= 56)

+        pad = 56 + 64 - s->blkused;

+    else

+        pad = 56 - s->blkused;

+

+    lenhi = (s->lenhi << 3) | (s->lenlo >> (32-3));

+    lenlo = (s->lenlo << 3);

+

+    memset(c, 0, pad);

+    c[0] = 0x80;

+    SHA256_Bytes(s, &c, pad);

+

+    c[0] = (lenhi >> 24) & 0xFF;

+    c[1] = (lenhi >> 16) & 0xFF;

+    c[2] = (lenhi >>  8) & 0xFF;

+    c[3] = (lenhi >>  0) & 0xFF;

+    c[4] = (lenlo >> 24) & 0xFF;

+    c[5] = (lenlo >> 16) & 0xFF;

+    c[6] = (lenlo >>  8) & 0xFF;

+    c[7] = (lenlo >>  0) & 0xFF;

+

+    SHA256_Bytes(s, &c, 8);

+

+    for (i = 0; i < 8; i++) {

+	digest[i*4+0] = (s->h[i] >> 24) & 0xFF;

+	digest[i*4+1] = (s->h[i] >> 16) & 0xFF;

+	digest[i*4+2] = (s->h[i] >>  8) & 0xFF;

+	digest[i*4+3] = (s->h[i] >>  0) & 0xFF;

+    }

+}

+

+void SHA256_Simple(const void *p, int len, unsigned char *output) {

+    SHA256_State s;

+

+    SHA256_Init(&s);

+    SHA256_Bytes(&s, p, len);

+    SHA256_Final(&s, output);

+}

+

+/*

+ * Thin abstraction for things where hashes are pluggable.

+ */

+

+static void *sha256_init(void)

+{

+    SHA256_State *s;

+

+    s = snew(SHA256_State);

+    SHA256_Init(s);

+    return s;

+}

+

+static void sha256_bytes(void *handle, void *p, int len)

+{

+    SHA256_State *s = handle;

+

+    SHA256_Bytes(s, p, len);

+}

+

+static void sha256_final(void *handle, unsigned char *output)

+{

+    SHA256_State *s = handle;

+

+    SHA256_Final(s, output);

+    sfree(s);

+}

+

+const struct ssh_hash ssh_sha256 = {

+    sha256_init, sha256_bytes, sha256_final, 32, "SHA-256"

+};

+

+#ifdef TEST

+

+#include <stdio.h>

+#include <stdlib.h>

+#include <assert.h>

+

+int main(void) {

+    unsigned char digest[32];

+    int i, j, errors;

+

+    struct {

+	const char *teststring;

+	unsigned char digest[32];

+    } tests[] = {

+	{ "abc", {

+	    0xba, 0x78, 0x16, 0xbf, 0x8f, 0x01, 0xcf, 0xea,

+	    0x41, 0x41, 0x40, 0xde, 0x5d, 0xae, 0x22, 0x23,

+	    0xb0, 0x03, 0x61, 0xa3, 0x96, 0x17, 0x7a, 0x9c,

+	    0xb4, 0x10, 0xff, 0x61, 0xf2, 0x00, 0x15, 0xad,

+	} },

+	{ "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", {

+	    0x24, 0x8d, 0x6a, 0x61, 0xd2, 0x06, 0x38, 0xb8,

+	    0xe5, 0xc0, 0x26, 0x93, 0x0c, 0x3e, 0x60, 0x39,

+	    0xa3, 0x3c, 0xe4, 0x59, 0x64, 0xff, 0x21, 0x67,

+	    0xf6, 0xec, 0xed, 0xd4, 0x19, 0xdb, 0x06, 0xc1,

+	} },

+    };

+

+    errors = 0;

+

+    for (i = 0; i < sizeof(tests) / sizeof(*tests); i++) {

+	SHA256_Simple(tests[i].teststring,

+		      strlen(tests[i].teststring), digest);

+	for (j = 0; j < 32; j++) {

+	    if (digest[j] != tests[i].digest[j]) {

+		fprintf(stderr,

+			"\"%s\" digest byte %d should be 0x%02x, is 0x%02x\n",

+			tests[i].teststring, j, tests[i].digest[j], digest[j]);

+		errors++;

+	    }

+	}

+    }

+

+    printf("%d errors\n", errors);

+

+    return 0;

+}

+

+#endif