3  * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
24  * md5_vector - MD5 hash for data vector
29  * Returns: 0 on success, -1 of failure
37 		return -1;  in md5_vector()
47 /* ===== start - public domain MD5 implementation ===== */
49  * This code implements the MD5 message-digest algorithm.
62  * will fill a supplied 16-byte array with the digest.
69  * Note: this code is harmless on little-endian machines.
79     } while (--longs);  in byteReverse()
89     ctx->buf[0] = 0x67452301;  in MD5Init()
90     ctx->buf[1] = 0xefcdab89;  in MD5Init()
91     ctx->buf[2] = 0x98badcfe;  in MD5Init()
92     ctx->buf[3] = 0x10325476;  in MD5Init()
94     ctx->bits[0] = 0;  in MD5Init()
95     ctx->bits[1] = 0;  in MD5Init()
108     t = ctx->bits[0];  in MD5Update()
109     if ((ctx->bits[0] = t + ((u32) len << 3)) < t)  in MD5Update()
110 	ctx->bits[1]++;		/* Carry from low to high */  in MD5Update()
111     ctx->bits[1] += len >> 29;  in MD5Update()
113     t = (t >> 3) & 0x3f;	/* Bytes already in shsInfo->data */  in MD5Update()
115     /* Handle any leading odd-sized chunks */  in MD5Update()
118 	unsigned char *p = (unsigned char *) ctx->in + t;  in MD5Update()
120 	t = 64 - t;  in MD5Update()
126 	byteReverse(ctx->in, 16);  in MD5Update()
127 	MD5Transform(ctx->buf, (u32 *) ctx->in);  in MD5Update()
129 	len -= t;  in MD5Update()
131     /* Process data in 64-byte chunks */  in MD5Update()
134 	os_memcpy(ctx->in, buf, 64);  in MD5Update()
135 	byteReverse(ctx->in, 16);  in MD5Update()
136 	MD5Transform(ctx->buf, (u32 *) ctx->in);  in MD5Update()
138 	len -= 64;  in MD5Update()
143     os_memcpy(ctx->in, buf, len);  in MD5Update()
147  * Final wrapup - pad to 64-byte boundary with the bit pattern
148  * 1 0* (64-bit count of bits processed, MSB-first)
156     count = (ctx->bits[0] >> 3) & 0x3F;  in MD5Final()
160     p = ctx->in + count;  in MD5Final()
164     count = 64 - 1 - count;  in MD5Final()
170 	byteReverse(ctx->in, 16);  in MD5Final()
171 	MD5Transform(ctx->buf, (u32 *) ctx->in);  in MD5Final()
174 	os_memset(ctx->in, 0, 56);  in MD5Final()
177 	os_memset(p, 0, count - 8);  in MD5Final()
179     byteReverse(ctx->in, 14);  in MD5Final()
182     ((u32 *) aliasing_hide_typecast(ctx->in, u32))[14] = ctx->bits[0];  in MD5Final()
183     ((u32 *) aliasing_hide_typecast(ctx->in, u32))[15] = ctx->bits[1];  in MD5Final()
185     MD5Transform(ctx->buf, (u32 *) ctx->in);  in MD5Final()
186     byteReverse((unsigned char *) ctx->buf, 4);  in MD5Final()
187     os_memcpy(digest, ctx->buf, 16);  in MD5Final()
191 /* The four core functions - F1 is optimized somewhat */
193 /* #define F1(x, y, z) (x & y | ~x & z) */
194 #define F1(x, y, z) (z ^ (x & (y ^ z)))  argument
195 #define F2(x, y, z) F1(z, x, y)  argument
196 #define F3(x, y, z) (x ^ y ^ z)  argument
197 #define F4(x, y, z) (y ^ (x | ~z))  argument
200 #define MD5STEP(f, w, x, y, z, data, s) \  argument
201 	( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )
290 /* ===== end - public domain MD5 implementation ===== */