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-rw-r--r--security/manager/ssl/md4.c145
1 files changed, 145 insertions, 0 deletions
diff --git a/security/manager/ssl/md4.c b/security/manager/ssl/md4.c
new file mode 100644
index 000000000..696865de3
--- /dev/null
+++ b/security/manager/ssl/md4.c
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+/* vim:set ts=2 sw=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * "clean room" MD4 implementation (see RFC 1320)
+ */
+
+#include <string.h>
+#include "md4.h"
+
+/* the "conditional" function */
+#define F(x,y,z) (((x) & (y)) | (~(x) & (z)))
+
+/* the "majority" function */
+#define G(x,y,z) (((x) & (y)) | ((x) & (z)) | ((y) & (z)))
+
+/* the "parity" function */
+#define H(x,y,z) ((x) ^ (y) ^ (z))
+
+/* rotate n-bits to the left */
+#define ROTL(x,n) (((x) << (n)) | ((x) >> (0x20 - n)))
+
+/* round 1: [abcd k s]: a = (a + F(b,c,d) + X[k]) <<< s */
+#define RD1(a,b,c,d,k,s) a += F(b,c,d) + X[k]; a = ROTL(a,s)
+
+/* round 2: [abcd k s]: a = (a + G(b,c,d) + X[k] + MAGIC) <<< s */
+#define RD2(a,b,c,d,k,s) a += G(b,c,d) + X[k] + 0x5A827999; a = ROTL(a,s)
+
+/* round 3: [abcd k s]: a = (a + H(b,c,d) + X[k] + MAGIC) <<< s */
+#define RD3(a,b,c,d,k,s) a += H(b,c,d) + X[k] + 0x6ED9EBA1; a = ROTL(a,s)
+
+/* converts from word array to byte array, len is number of bytes */
+static void w2b(uint8_t *out, const uint32_t *in, uint32_t len)
+{
+ uint8_t *bp; const uint32_t *wp, *wpend;
+
+ bp = out;
+ wp = in;
+ wpend = wp + (len >> 2);
+
+ for (; wp != wpend; ++wp, bp += 4)
+ {
+ bp[0] = (uint8_t) ((*wp ) & 0xFF);
+ bp[1] = (uint8_t) ((*wp >> 8) & 0xFF);
+ bp[2] = (uint8_t) ((*wp >> 16) & 0xFF);
+ bp[3] = (uint8_t) ((*wp >> 24) & 0xFF);
+ }
+}
+
+/* converts from byte array to word array, len is number of bytes */
+static void b2w(uint32_t *out, const uint8_t *in, uint32_t len)
+{
+ uint32_t *wp; const uint8_t *bp, *bpend;
+
+ wp = out;
+ bp = in;
+ bpend = in + len;
+
+ for (; bp != bpend; bp += 4, ++wp)
+ {
+ *wp = (uint32_t) (bp[0] ) |
+ (uint32_t) (bp[1] << 8) |
+ (uint32_t) (bp[2] << 16) |
+ (uint32_t) (bp[3] << 24);
+ }
+}
+
+/* update state: data is 64 bytes in length */
+static void md4step(uint32_t state[4], const uint8_t *data)
+{
+ uint32_t A, B, C, D, X[16];
+
+ b2w(X, data, 64);
+
+ A = state[0];
+ B = state[1];
+ C = state[2];
+ D = state[3];
+
+ RD1(A,B,C,D, 0,3); RD1(D,A,B,C, 1,7); RD1(C,D,A,B, 2,11); RD1(B,C,D,A, 3,19);
+ RD1(A,B,C,D, 4,3); RD1(D,A,B,C, 5,7); RD1(C,D,A,B, 6,11); RD1(B,C,D,A, 7,19);
+ RD1(A,B,C,D, 8,3); RD1(D,A,B,C, 9,7); RD1(C,D,A,B,10,11); RD1(B,C,D,A,11,19);
+ RD1(A,B,C,D,12,3); RD1(D,A,B,C,13,7); RD1(C,D,A,B,14,11); RD1(B,C,D,A,15,19);
+
+ RD2(A,B,C,D, 0,3); RD2(D,A,B,C, 4,5); RD2(C,D,A,B, 8, 9); RD2(B,C,D,A,12,13);
+ RD2(A,B,C,D, 1,3); RD2(D,A,B,C, 5,5); RD2(C,D,A,B, 9, 9); RD2(B,C,D,A,13,13);
+ RD2(A,B,C,D, 2,3); RD2(D,A,B,C, 6,5); RD2(C,D,A,B,10, 9); RD2(B,C,D,A,14,13);
+ RD2(A,B,C,D, 3,3); RD2(D,A,B,C, 7,5); RD2(C,D,A,B,11, 9); RD2(B,C,D,A,15,13);
+
+ RD3(A,B,C,D, 0,3); RD3(D,A,B,C, 8,9); RD3(C,D,A,B, 4,11); RD3(B,C,D,A,12,15);
+ RD3(A,B,C,D, 2,3); RD3(D,A,B,C,10,9); RD3(C,D,A,B, 6,11); RD3(B,C,D,A,14,15);
+ RD3(A,B,C,D, 1,3); RD3(D,A,B,C, 9,9); RD3(C,D,A,B, 5,11); RD3(B,C,D,A,13,15);
+ RD3(A,B,C,D, 3,3); RD3(D,A,B,C,11,9); RD3(C,D,A,B, 7,11); RD3(B,C,D,A,15,15);
+
+ state[0] += A;
+ state[1] += B;
+ state[2] += C;
+ state[3] += D;
+}
+
+void md4sum(const uint8_t *input, uint32_t inputLen, uint8_t *result)
+{
+ uint8_t final[128];
+ uint32_t i, n, m, state[4];
+ uint64_t inputLenBits;
+ uint32_t inputLenBitsLow;
+ uint32_t inputLenBitsHigh;
+
+ /* magic initial states */
+ state[0] = 0x67452301;
+ state[1] = 0xEFCDAB89;
+ state[2] = 0x98BADCFE;
+ state[3] = 0x10325476;
+
+ /* compute number of complete 64-byte segments contained in input */
+ m = inputLen >> 6;
+
+ /* digest first m segments */
+ for (i=0; i<m; ++i)
+ md4step(state, (input + (i << 6)));
+
+ /* build final buffer */
+ n = inputLen % 64;
+ memcpy(final, input + (m << 6), n);
+ final[n] = 0x80;
+ memset(final + n + 1, 0, 120 - (n + 1));
+
+ /* Append the original input length in bits as a 64-bit number. This is done
+ * in two 32-bit chunks, with the least-significant 32 bits first.
+ * w2b will handle endianness. */
+ inputLenBits = inputLen << 3;
+ inputLenBitsLow = (uint32_t)(inputLenBits & 0xFFFFFFFF);
+ w2b(final + (n >= 56 ? 120 : 56), &inputLenBitsLow, 4);
+ inputLenBitsHigh = (uint32_t)((inputLenBits >> 32) & 0xFFFFFFFF);
+ w2b(final + (n >= 56 ? 124 : 60), &inputLenBitsHigh, 4);
+
+ md4step(state, final);
+ if (n >= 56)
+ md4step(state, final + 64);
+
+ /* copy state to result */
+ w2b(result, state, 16);
+}