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-rw-r--r--lib/clplumbing/md5.c335
1 files changed, 335 insertions, 0 deletions
diff --git a/lib/clplumbing/md5.c b/lib/clplumbing/md5.c
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+++ b/lib/clplumbing/md5.c
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+/*
+ * This code implements the MD5 message-digest algorithm.
+ * The algorithm is due to Ron Rivest. This code was
+ * written by Colin Plumb in 1993, no copyright is claimed.
+ * This code is in the public domain; do with it what you wish.
+ *
+ * Equivalent code is available from RSA Data Security, Inc.
+ * This code has been tested against that, and is equivalent,
+ * except that you don't need to include two pages of legalese
+ * with every copy.
+ *
+ * To compute the message digest of a chunk of bytes, declare an
+ * MD5Context structure, pass it to MD5Init, call MD5Update as
+ * needed on buffers full of bytes, and then call MD5Final, which
+ * will fill a supplied 16-byte array with the digest.
+ *
+ * Cleaned up for heartbeat by
+ * Mitja Sarp <mitja@lysator.liu.se>
+ * Sun Jiang Dong <sunjd@cn.ibm.com>
+ * Pan Jia Ming <jmltc@cn.ibm.com>
+ *
+ */
+
+#include <lha_internal.h>
+
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#include <stdio.h> /* for sprintf() */
+#include <string.h> /* for memcpy() */
+#include <sys/types.h> /* for stupid systems */
+#include <netinet/in.h> /* for ntohl() */
+#include <clplumbing/cl_log.h>
+#include <clplumbing/md5.h>
+
+#define MD5_DIGESTSIZE 16
+#define MD5_BLOCKSIZE 64
+
+typedef struct MD5Context_st {
+ uint32_t buf[4];
+ uint32_t bytes[2];
+ uint32_t in[16];
+}MD5Context;
+
+#define md5byte unsigned char
+
+struct MD5Context {
+ uint32_t buf[4];
+ uint32_t bytes[2];
+ uint32_t in[16];
+};
+
+void MD5Init(MD5Context *context);
+void MD5Update(MD5Context *context, md5byte const *buf, unsigned len);
+void MD5Final(unsigned char digest[16], MD5Context *context);
+void MD5Transform(uint32_t buf[4], uint32_t const in[16]);
+
+
+#ifdef CONFIG_BIG_ENDIAN
+static inline void byteSwap(uint32_t * buf, uint32_t len);
+
+static inline void
+byteSwap(uint32_t * buf, uint32_t len)
+{
+ int i;
+ for (i = 0; i < len; i ++) {
+ uint32_t tmp = buf[i];
+ buf[i] = ( (uint32_t) ((unsigned char *) &tmp)[0] ) |
+ (((uint32_t) ((unsigned char *) &tmp)[1]) << 8) |
+ (((uint32_t) ((unsigned char *) &tmp)[2]) << 16) |
+ (((uint32_t) ((unsigned char *) &tmp)[3]) << 24);
+ }
+}
+#elif defined(CONFIG_LITTLE_ENDIAN)
+ #define byteSwap(buf,words)
+#else
+ #error "Neither CONFIG_BIG_ENDIAN nor CONFIG_LITTLE_ENDIAN defined!"
+#endif
+
+/*
+ * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
+ * initialization constants.
+ */
+void
+MD5Init(MD5Context *ctx)
+{
+ ctx->buf[0] = 0x67452301ul;
+ ctx->buf[1] = 0xefcdab89ul;
+ ctx->buf[2] = 0x98badcfeul;
+ ctx->buf[3] = 0x10325476ul;
+
+ ctx->bytes[0] = 0;
+ ctx->bytes[1] = 0;
+}
+
+/*
+ * Update context to reflect the concatenation of another buffer full
+ * of bytes.
+ */
+void
+MD5Update(MD5Context *ctx, md5byte const *buf, unsigned len)
+{
+ uint32_t t;
+
+ /* Update byte count */
+
+ t = ctx->bytes[0];
+ if ((ctx->bytes[0] = t + len) < t)
+ ctx->bytes[1]++; /* Carry from low to high */
+
+ t = 64 - (t & 0x3f); /* Space available in ctx->in (at least 1) */
+ if (t > len) {
+ memcpy((md5byte *)ctx->in + 64 - t, buf, len);
+ return;
+ }
+ /* First chunk is an odd size */
+ memcpy((md5byte *)ctx->in + 64 - t, buf, t);
+ byteSwap(ctx->in, 16);
+ MD5Transform(ctx->buf, ctx->in);
+ buf += t;
+ len -= t;
+
+ /* Process data in 64-byte chunks */
+ while (len >= 64) {
+ memcpy(ctx->in, buf, 64);
+ byteSwap(ctx->in, 16);
+ MD5Transform(ctx->buf, ctx->in);
+ buf += 64;
+ len -= 64;
+ }
+
+ /* Handle any remaining bytes of data. */
+ memcpy(ctx->in, buf, len);
+}
+
+/*
+ * Final wrapup - pad to 64-byte boundary with the bit pattern
+ * 1 0* (64-bit count of bits processed, MSB-first)
+ */
+void
+MD5Final(md5byte digest[16], MD5Context *ctx)
+{
+ int count = ctx->bytes[0] & 0x3f; /* Number of bytes in ctx->in */
+ md5byte *p = (md5byte *)ctx->in + count;
+
+ /* Set the first char of padding to 0x80. There is always room. */
+ *p++ = 0x80;
+
+ /* Bytes of padding needed to make 56 bytes (-8..55) */
+ count = 56 - 1 - count;
+
+ if (count < 0) { /* Padding forces an extra block */
+ memset(p, 0, count + 8);
+ byteSwap(ctx->in, 16);
+ MD5Transform(ctx->buf, ctx->in);
+ p = (md5byte *)ctx->in;
+ count = 56;
+ }
+ memset(p, 0, count);
+ byteSwap(ctx->in, 14);
+
+ /* Append length in bits and transform */
+ ctx->in[14] = ctx->bytes[0] << 3;
+ ctx->in[15] = ctx->bytes[1] << 3 | ctx->bytes[0] >> 29;
+ MD5Transform(ctx->buf, ctx->in);
+
+ byteSwap(ctx->buf, 16);
+ memcpy(digest, ctx->buf, 16);
+ memset(ctx, 0, sizeof(*ctx)); /* In case it's sensitive */
+}
+
+/* The four core functions - F1 is optimized somewhat */
+
+/* #define F1(x, y, z) (x & y | ~x & z) */
+#define F1(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
+#define F2(x, y, z) F1(z, x, y)
+#define F3(x, y, z) ((x) ^ (y) ^ (z))
+#define F4(x, y, z) ((y) ^ ((x) | ~(z)))
+
+/* This is the central step in the MD5 algorithm. */
+#define MD5STEP(f,w,x,y,z,in,s) \
+ (w += f(x,y,z) + (in), (w) = ((w)<<(s) | (w)>>(32-(s))) + (x))
+
+/*
+ * The core of the MD5 algorithm, this alters an existing MD5 hash to
+ * reflect the addition of 16 longwords of new data. MD5Update blocks
+ * the data and converts bytes into longwords for this routine.
+ */
+void
+MD5Transform(uint32_t buf[4], uint32_t const in[16])
+{
+ register uint32_t a, b, c, d;
+
+ a = buf[0];
+ b = buf[1];
+ c = buf[2];
+ d = buf[3];
+
+ MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478ul, 7);
+ MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756ul, 12);
+ MD5STEP(F1, c, d, a, b, in[2] + 0x242070dbul, 17);
+ MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceeeul, 22);
+ MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faful, 7);
+ MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62aul, 12);
+ MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613ul, 17);
+ MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501ul, 22);
+ MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8ul, 7);
+ MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7aful, 12);
+ MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1ul, 17);
+ MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7beul, 22);
+ MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122ul, 7);
+ MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193ul, 12);
+ MD5STEP(F1, c, d, a, b, in[14] + 0xa679438eul, 17);
+ MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821ul, 22);
+
+ MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562ul, 5);
+ MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340ul, 9);
+ MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51ul, 14);
+ MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aaul, 20);
+ MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105dul, 5);
+ MD5STEP(F2, d, a, b, c, in[10] + 0x02441453ul, 9);
+ MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681ul, 14);
+ MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8ul, 20);
+ MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6ul, 5);
+ MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6ul, 9);
+ MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87ul, 14);
+ MD5STEP(F2, b, c, d, a, in[8] + 0x455a14edul, 20);
+ MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905ul, 5);
+ MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8ul, 9);
+ MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9ul, 14);
+ MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8aul, 20);
+
+ MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942ul, 4);
+ MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681ul, 11);
+ MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122ul, 16);
+ MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380cul, 23);
+ MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44ul, 4);
+ MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9ul, 11);
+ MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60ul, 16);
+ MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70ul, 23);
+ MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6ul, 4);
+ MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127faul, 11);
+ MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085ul, 16);
+ MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05ul, 23);
+ MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039ul, 4);
+ MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5ul, 11);
+ MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8ul, 16);
+ MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665ul, 23);
+
+ MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244ul, 6);
+ MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97ul, 10);
+ MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7ul, 15);
+ MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039ul, 21);
+ MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3ul, 6);
+ MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92ul, 10);
+ MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47dul, 15);
+ MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1ul, 21);
+ MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4ful, 6);
+ MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0ul, 10);
+ MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314ul, 15);
+ MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1ul, 21);
+ MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82ul, 6);
+ MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235ul, 10);
+ MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bbul, 15);
+ MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391ul, 21);
+
+ buf[0] += a;
+ buf[1] += b;
+ buf[2] += c;
+ buf[3] += d;
+}
+
+int MD5( const unsigned char *data
+ , unsigned long len
+ , unsigned char *digest)
+{
+ MD5Context context;
+
+ MD5Init(&context);
+ MD5Update(&context, data, len);
+ MD5Final(digest, &context);
+
+ return 0;
+}
+
+int HMAC( const unsigned char * key
+ , unsigned int key_len
+ , const unsigned char * text
+ , unsigned long textlen
+ , unsigned char * digest)
+{
+ MD5Context context;
+ /* inner padding - key XORd with ipad */
+ unsigned char k_ipad[65];
+ /* outer padding - * key XORd with opad */
+ unsigned char k_opad[65];
+ unsigned char tk[MD5_DIGESTSIZE];
+ int i;
+
+ /* if key is longer than MD5_BLOCKSIZE bytes reset it to key=MD5(key) */
+ if (key_len > MD5_BLOCKSIZE) {
+ MD5Context tctx;
+ MD5Init(&tctx);
+ MD5Update(&tctx, (const unsigned char *)key, key_len);
+ MD5Final(tk, &tctx);
+
+ key = (unsigned char *)tk;
+ key_len = MD5_DIGESTSIZE;
+ }
+ /* start out by storing key in pads */
+ memset(k_ipad, 0, sizeof k_ipad);
+ memset(k_opad, 0, sizeof k_opad);
+ memcpy(k_ipad, key, key_len);
+ memcpy(k_opad, key, key_len);
+
+ /* XOR key with ipad and opad values */
+ for (i=0; i<MD5_BLOCKSIZE; i++) {
+ k_ipad[i] ^= 0x36;
+ k_opad[i] ^= 0x5c;
+ }
+ /* perform inner MD5 */
+ MD5Init(&context); /* init context for 1st pass */
+ MD5Update(&context, k_ipad, MD5_BLOCKSIZE); /* start with inner pad */
+ MD5Update(&context, text, textlen); /* then text of datagram */
+ MD5Final(digest, &context); /* finish up 1st pass */
+
+ /* perform outer MD5 */
+ MD5Init(&context); /* init context for 2nd pass */
+ MD5Update(&context, k_opad, MD5_BLOCKSIZE); /* start with outer pad */
+ MD5Update(&context, digest, MD5_DIGESTSIZE); /* then results of 1st hash */
+
+ MD5Final(digest, &context); /* finish up 2nd pass */
+
+ return 0;
+}
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