#define rol(x,y) ( ((x) << (y)) | (((uint32)x) >> (32-y)) )
-void SHA_Core_Init(uint32 h[5]) {
+void SHA_Core_Init(uint32 h[5])
+{
h[0] = 0x67452301;
h[1] = 0xefcdab89;
h[2] = 0x98badcfe;
h[4] = 0xc3d2e1f0;
}
-void SHATransform(word32 *digest, word32 *block) {
+void SHATransform(word32 * digest, word32 * block)
+{
word32 w[80];
- word32 a,b,c,d,e;
+ word32 a, b, c, d, e;
int t;
for (t = 0; t < 16; t++)
- w[t] = block[t];
+ w[t] = block[t];
for (t = 16; t < 80; t++) {
- word32 tmp = w[t-3] ^ w[t-8] ^ w[t-14] ^ w[t-16];
- w[t] = rol(tmp, 1);
+ word32 tmp = w[t - 3] ^ w[t - 8] ^ w[t - 14] ^ w[t - 16];
+ w[t] = rol(tmp, 1);
}
a = digest[0];
e = digest[4];
for (t = 0; t < 20; t++) {
- word32 tmp = rol(a, 5) + ( (b&c) | (d&~b) ) + e + w[t] + 0x5a827999;
- e = d; d = c; c = rol(b, 30); b = a; a = tmp;
+ word32 tmp =
+ rol(a, 5) + ((b & c) | (d & ~b)) + e + w[t] + 0x5a827999;
+ e = d;
+ d = c;
+ c = rol(b, 30);
+ b = a;
+ a = tmp;
}
for (t = 20; t < 40; t++) {
- word32 tmp = rol(a, 5) + (b^c^d) + e + w[t] + 0x6ed9eba1;
- e = d; d = c; c = rol(b, 30); b = a; a = tmp;
+ word32 tmp = rol(a, 5) + (b ^ c ^ d) + e + w[t] + 0x6ed9eba1;
+ e = d;
+ d = c;
+ c = rol(b, 30);
+ b = a;
+ a = tmp;
}
for (t = 40; t < 60; t++) {
- word32 tmp = rol(a, 5) + ( (b&c) | (b&d) | (c&d) ) + e + w[t] + 0x8f1bbcdc;
- e = d; d = c; c = rol(b, 30); b = a; a = tmp;
+ word32 tmp = rol(a,
+ 5) + ((b & c) | (b & d) | (c & d)) + e + w[t] +
+ 0x8f1bbcdc;
+ e = d;
+ d = c;
+ c = rol(b, 30);
+ b = a;
+ a = tmp;
}
for (t = 60; t < 80; t++) {
- word32 tmp = rol(a, 5) + (b^c^d) + e + w[t] + 0xca62c1d6;
- e = d; d = c; c = rol(b, 30); b = a; a = tmp;
+ word32 tmp = rol(a, 5) + (b ^ c ^ d) + e + w[t] + 0xca62c1d6;
+ e = d;
+ d = c;
+ c = rol(b, 30);
+ b = a;
+ a = tmp;
}
digest[0] += a;
* the end, and pass those blocks to the core SHA algorithm.
*/
-void SHA_Init(SHA_State *s) {
+void SHA_Init(SHA_State * s)
+{
SHA_Core_Init(s->h);
s->blkused = 0;
s->lenhi = s->lenlo = 0;
}
-void SHA_Bytes(SHA_State *s, void *p, int len) {
- unsigned char *q = (unsigned char *)p;
+void SHA_Bytes(SHA_State * s, void *p, int len)
+{
+ unsigned char *q = (unsigned char *) p;
uint32 wordblock[16];
uint32 lenw = len;
int i;
s->lenlo += lenw;
s->lenhi += (s->lenlo < lenw);
- if (s->blkused && s->blkused+len < 64) {
- /*
- * Trivial case: just add to the block.
- */
- memcpy(s->block + s->blkused, q, len);
- s->blkused += len;
+ if (s->blkused && s->blkused + len < 64) {
+ /*
+ * 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 >= 64) {
- memcpy(s->block + s->blkused, q, 64 - s->blkused);
- q += 64 - s->blkused;
- len -= 64 - 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 );
- }
- SHATransform(s->h, wordblock);
- s->blkused = 0;
- }
- memcpy(s->block, q, len);
- s->blkused = len;
+ /*
+ * We must complete and process at least one block.
+ */
+ while (s->blkused + len >= 64) {
+ memcpy(s->block + s->blkused, q, 64 - s->blkused);
+ q += 64 - s->blkused;
+ len -= 64 - 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);
+ }
+ SHATransform(s->h, wordblock);
+ s->blkused = 0;
+ }
+ memcpy(s->block, q, len);
+ s->blkused = len;
}
}
-void SHA_Final(SHA_State *s, unsigned char *output) {
+void SHA_Final(SHA_State * s, unsigned char *output)
+{
int i;
int pad;
unsigned char c[64];
uint32 lenhi, lenlo;
if (s->blkused >= 56)
- pad = 56 + 64 - s->blkused;
+ pad = 56 + 64 - s->blkused;
else
- pad = 56 - s->blkused;
+ pad = 56 - s->blkused;
- lenhi = (s->lenhi << 3) | (s->lenlo >> (32-3));
+ lenhi = (s->lenhi << 3) | (s->lenlo >> (32 - 3));
lenlo = (s->lenlo << 3);
memset(c, 0, pad);
c[0] = (lenhi >> 24) & 0xFF;
c[1] = (lenhi >> 16) & 0xFF;
- c[2] = (lenhi >> 8) & 0xFF;
- c[3] = (lenhi >> 0) & 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;
+ c[6] = (lenlo >> 8) & 0xFF;
+ c[7] = (lenlo >> 0) & 0xFF;
SHA_Bytes(s, &c, 8);
for (i = 0; i < 5; i++) {
- output[i*4 ] = (s->h[i] >> 24) & 0xFF;
- output[i*4+1] = (s->h[i] >> 16) & 0xFF;
- output[i*4+2] = (s->h[i] >> 8) & 0xFF;
- output[i*4+3] = (s->h[i] ) & 0xFF;
+ output[i * 4] = (s->h[i] >> 24) & 0xFF;
+ output[i * 4 + 1] = (s->h[i] >> 16) & 0xFF;
+ output[i * 4 + 2] = (s->h[i] >> 8) & 0xFF;
+ output[i * 4 + 3] = (s->h[i]) & 0xFF;
}
}
-void SHA_Simple(void *p, int len, unsigned char *output) {
+void SHA_Simple(void *p, int len, unsigned char *output)
+{
SHA_State s;
SHA_Init(&s);
static SHA_State sha1_cs_mac_s1, sha1_cs_mac_s2;
static SHA_State sha1_sc_mac_s1, sha1_sc_mac_s2;
-static void sha1_key(SHA_State *s1, SHA_State *s2,
- unsigned char *key, int len) {
+static void sha1_key(SHA_State * s1, SHA_State * s2,
+ unsigned char *key, int len)
+{
unsigned char foo[64];
int i;
memset(foo, 0x36, 64);
for (i = 0; i < len && i < 64; i++)
- foo[i] ^= key[i];
+ foo[i] ^= key[i];
SHA_Init(s1);
SHA_Bytes(s1, foo, 64);
memset(foo, 0x5C, 64);
for (i = 0; i < len && i < 64; i++)
- foo[i] ^= key[i];
+ foo[i] ^= key[i];
SHA_Init(s2);
SHA_Bytes(s2, foo, 64);
- memset(foo, 0, 64); /* burn the evidence */
+ memset(foo, 0, 64); /* burn the evidence */
}
-static void sha1_cskey(unsigned char *key) {
+static void sha1_cskey(unsigned char *key)
+{
sha1_key(&sha1_cs_mac_s1, &sha1_cs_mac_s2, key, 20);
}
-static void sha1_sckey(unsigned char *key) {
+static void sha1_sckey(unsigned char *key)
+{
sha1_key(&sha1_sc_mac_s1, &sha1_sc_mac_s2, key, 20);
}
-static void sha1_cskey_buggy(unsigned char *key) {
+static void sha1_cskey_buggy(unsigned char *key)
+{
sha1_key(&sha1_cs_mac_s1, &sha1_cs_mac_s2, key, 16);
}
-static void sha1_sckey_buggy(unsigned char *key) {
+static void sha1_sckey_buggy(unsigned char *key)
+{
sha1_key(&sha1_sc_mac_s1, &sha1_sc_mac_s2, key, 16);
}
-static void sha1_do_hmac(SHA_State *s1, SHA_State *s2,
- unsigned char *blk, int len, unsigned long seq,
- unsigned char *hmac) {
+static void sha1_do_hmac(SHA_State * s1, SHA_State * s2,
+ unsigned char *blk, int len, unsigned long seq,
+ unsigned char *hmac)
+{
SHA_State s;
unsigned char intermediate[20];
- intermediate[0] = (unsigned char)((seq >> 24) & 0xFF);
- intermediate[1] = (unsigned char)((seq >> 16) & 0xFF);
- intermediate[2] = (unsigned char)((seq >> 8) & 0xFF);
- intermediate[3] = (unsigned char)((seq ) & 0xFF);
+ intermediate[0] = (unsigned char) ((seq >> 24) & 0xFF);
+ intermediate[1] = (unsigned char) ((seq >> 16) & 0xFF);
+ intermediate[2] = (unsigned char) ((seq >> 8) & 0xFF);
+ intermediate[3] = (unsigned char) ((seq) & 0xFF);
- s = *s1; /* structure copy */
+ s = *s1; /* structure copy */
SHA_Bytes(&s, intermediate, 4);
SHA_Bytes(&s, blk, len);
SHA_Final(&s, intermediate);
- s = *s2; /* structure copy */
+ s = *s2; /* structure copy */
SHA_Bytes(&s, intermediate, 20);
SHA_Final(&s, hmac);
}
-static void sha1_generate(unsigned char *blk, int len, unsigned long seq) {
- sha1_do_hmac(&sha1_cs_mac_s1, &sha1_cs_mac_s2, blk, len, seq, blk+len);
+static void sha1_generate(unsigned char *blk, int len, unsigned long seq)
+{
+ sha1_do_hmac(&sha1_cs_mac_s1, &sha1_cs_mac_s2, blk, len, seq,
+ blk + len);
}
-static int sha1_verify(unsigned char *blk, int len, unsigned long seq) {
+static int sha1_verify(unsigned char *blk, int len, unsigned long seq)
+{
unsigned char correct[20];
sha1_do_hmac(&sha1_sc_mac_s1, &sha1_sc_mac_s2, blk, len, seq, correct);
- return !memcmp(correct, blk+len, 20);
+ return !memcmp(correct, blk + len, 20);
}
const struct ssh_mac ssh_sha1 = {
projects / u / mdw / putty / blobdiff