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openssl/crypto/whrlpool/wp_dgst.c

Index: openssl/crypto/whrlpool/wp_dgst.c
===================================================================
--- openssl/crypto/whrlpool/wp_dgst.c	(revision 0)
+++ openssl/crypto/whrlpool/wp_dgst.c	(revision 0)
@@ -0,0 +1,264 @@
+/**
+ * The Whirlpool hashing function.
+ *
+ * <P>
+ * <b>References</b>
+ *
+ * <P>
+ * The Whirlpool algorithm was developed by
+ * <a href="mailto:pbarreto@scopus.com.br">Paulo S. L. M. Barreto</a> and
+ * <a href="mailto:vincent.rijmen@cryptomathic.com">Vincent Rijmen</a>.
+ *
+ * See
+ *      P.S.L.M. Barreto, V. Rijmen,
+ *      ``The Whirlpool hashing function,''
+ *      NESSIE submission, 2000 (tweaked version, 2001),
+ *      <https://www.cosic.esat.kuleuven.ac.be/nessie/workshop/submissions/whirlpool.zip>
+ *
+ * Based on "@version 3.0 (2003.03.12)" by Paulo S.L.M. Barreto and
+ * Vincent Rijmen. Lookup "reference implementations" on
+ * <http://planeta.terra.com.br/informatica/paulobarreto/>
+ *
+ * =============================================================================
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+ * OpenSSL-specific implementation notes.
+ *
+ * WHIRLPOOL_Update as well as one-stroke WHIRLPOOL both expect
+ * number of *bytes* as input length argument. Bit-oriented routine
+ * as specified by authors is called WHIRLPOOL_BitUpdate[!] and
+ * does not have one-stroke counterpart.
+ *
+ * WHIRLPOOL_BitUpdate implements byte-oriented loop, essentially
+ * to serve WHIRLPOOL_Update. This is done for performance.
+ *
+ * Unlike authors' reference implementation, block processing
+ * routine whirlpool_block is designed to operate on multi-block
+ * input. This is done for perfomance.
+ */
+
+#include "wp_locl.h"
+#include <string.h>
+
+int WHIRLPOOL_Init	(WHIRLPOOL_CTX *c)
+	{
+	memset (c,0,sizeof(*c));
+	return(1);
+	}
+
+int WHIRLPOOL_Update	(WHIRLPOOL_CTX *c,const void *_inp,size_t bytes)
+	{
+	/* Well, largest suitable chunk size actually is
+	 * (1<<(sizeof(size_t)*8-3))-64, but below number
+	 * is large enough for not to care about excessive
+	 * calls to WHIRLPOOL_BitUpdate... */
+	size_t chunk = ((size_t)1)<<(sizeof(size_t)*8-4);
+	const unsigned char *inp = _inp;
+
+	while (bytes>=chunk)
+		{
+		WHIRLPOOL_BitUpdate(c,inp,chunk*8);
+		bytes -= chunk;
+		inp   += chunk;
+		}
+	if (bytes)
+		WHIRLPOOL_BitUpdate(c,inp,bytes*8);
+
+	return(1);
+	}
+
+void WHIRLPOOL_BitUpdate(WHIRLPOOL_CTX *c,const void *_inp,size_t bits)
+	{
+	size_t		n;
+	unsigned int	bitoff = c->bitoff,
+			bitrem = bitoff%8,
+			inpgap = (8-(unsigned int)bits%8)&7;
+	const unsigned char *inp=_inp;
+
+	/* This 256-bit increment procedure relies on the size_t
+	 * being natural size of CPU register, so that we don't
+	 * have to mask the value in order to detect overflows. */
+	c->bitlen[0] += bits;
+	if (c->bitlen[0] < bits)	/* overflow */
+		{
+		n = 1;
+		do  { 	c->bitlen[n]++;
+		    } while(c->bitlen[n]==0
+		   	    && ++n<(WHIRLPOOL_COUNTER/sizeof(size_t)));
+		}
+
+#ifndef OPENSSL_SMALL_FOOTPRINT
+	reconsider:
+	if (inpgap==0 && bitrem==0)	/* byte-oriented loop */
+		{
+		while (bits)
+			{
+			if (bitoff==0 && (n=bits/WHIRLPOOL_BBLOCK))
+				{
+				whirlpool_block(c,inp,n);
+				inp  += n*WHIRLPOOL_BBLOCK/8;
+				bits %= WHIRLPOOL_BBLOCK;
+				}
+			else
+				{
+				unsigned int byteoff = bitoff/8;
+
+				bitrem = WHIRLPOOL_BBLOCK - bitoff;/* re-use bitrem */
+				if (bits >= bitrem)
+					{
+					bits -= bitrem;
+					bitrem /= 8;
+					memcpy(c->data+byteoff,inp,bitrem);
+					inp  += bitrem;
+					whirlpool_block(c,c->data,1);
+					bitoff = 0;
+					}
+				else
+					{
+					memcpy(c->data+byteoff,inp,bits/8);
+					bitoff += (unsigned int)bits;
+					bits = 0;
+					}
+				c->bitoff = bitoff;
+				}
+			}
+		}
+	else				/* bit-oriented loop */
+#endif
+		{
+		/*
+			   inp
+			   |
+			   +-------+-------+-------
+			      |||||||||||||||||||||
+			   +-------+-------+-------
+		+-------+-------+-------+-------+-------
+		||||||||||||||				c->data
+		+-------+-------+-------+-------+-------
+			|
+			c->bitoff/8
+		*/
+		while (bits)
+			{
+			unsigned int	byteoff	= bitoff/8;
+			unsigned char	b;
+
+#ifndef OPENSSL_SMALL_FOOTPRINT
+			if (bitrem==inpgap)
+				{
+				c->data[byteoff++] |= inp[0] & (0xff>>inpgap);
+				inpgap = 8-inpgap;
+				bitoff += inpgap;  bitrem = 0;	/* bitoff%8 */
+				bits   -= inpgap;  inpgap = 0;	/* bits%8   */
+				inp++;
+				if (bitoff==WHIRLPOOL_BBLOCK)
+					{
+					whirlpool_block(c,c->data,1);
+					bitoff = 0;
+					}
+				c->bitoff = bitoff;
+				goto reconsider;
+				}
+			else
+#endif
+			if (bits>=8)
+				{
+				b  = ((inp[0]<<inpgap) | (inp[1]>>(8-inpgap)));
+				b &= 0xff;
+				if (bitrem)	c->data[byteoff++] |= b>>bitrem;
+				else		c->data[byteoff++]  = b;
+				bitoff += 8;
+				bits   -= 8;
+				inp++;
+				if (bitoff>=WHIRLPOOL_BBLOCK)
+					{
+					whirlpool_block(c,c->data,1);
+					byteoff  = 0;
+					bitoff  %= WHIRLPOOL_BBLOCK;
+					}
+				if (bitrem)	c->data[byteoff] = b<<(8-bitrem);
+				}
+			else	/* remaining less than 8 bits */
+				{
+				b = (inp[0]<<inpgap)&0xff;
+				if (bitrem)	c->data[byteoff++] |= b>>bitrem;
+				else		c->data[byteoff++]  = b;
+				bitoff += (unsigned int)bits;
+				if (bitoff==WHIRLPOOL_BBLOCK)
+					{
+					whirlpool_block(c,c->data,1);
+					byteoff  = 0;
+			        	bitoff  %= WHIRLPOOL_BBLOCK;
+					}
+				if (bitrem)	c->data[byteoff] = b<<(8-bitrem);
+				bits = 0;
+				}
+			c->bitoff = bitoff;
+			}
+		}
+	}
+
+int WHIRLPOOL_Final	(unsigned char *md,WHIRLPOOL_CTX *c)
+	{
+	unsigned int	bitoff  = c->bitoff,
+			byteoff = bitoff/8;
+	size_t		i,j,v;
+	unsigned char  *p;
+
+	bitoff %= 8;
+	if (bitoff)	c->data[byteoff] |= 0x80>>bitoff;
+	else		c->data[byteoff]  = 0x80;
+	byteoff++;
+
+	/* pad with zeros */
+	if (byteoff > (WHIRLPOOL_BBLOCK/8-WHIRLPOOL_COUNTER))
+		{
+		if (byteoff<WHIRLPOOL_BBLOCK/8)
+			memset(&c->data[byteoff],0,WHIRLPOOL_BBLOCK/8-byteoff);
+		whirlpool_block(c,c->data,1);
+		byteoff = 0;
+		}
+	if (byteoff < (WHIRLPOOL_BBLOCK/8-WHIRLPOOL_COUNTER))
+		memset(&c->data[byteoff],0,
+			(WHIRLPOOL_BBLOCK/8-WHIRLPOOL_COUNTER)-byteoff);
+	/* smash 256-bit c->bitlen in big-endian order */
+	p = &c->data[WHIRLPOOL_BBLOCK/8-1];	/* last byte in c->data */
+	for(i=0;i<WHIRLPOOL_COUNTER/sizeof(size_t);i++)
+		for(v=c->bitlen[i],j=0;j<sizeof(size_t);j++,v>>=8)
+			*p-- = (unsigned char)(v&0xff);
+
+	whirlpool_block(c,c->data,1);
+
+	if (md)	{
+		memcpy(md,c->H.c,WHIRLPOOL_DIGEST_LENGTH);
+		memset(c,0,sizeof(*c));
+		return(1);
+		}
+	return(0);
+	}
+
+unsigned char *WHIRLPOOL(const void *inp, size_t bytes,unsigned char *md)
+	{
+	WHIRLPOOL_CTX ctx;
+	static unsigned char m[WHIRLPOOL_DIGEST_LENGTH];
+
+	if (md == NULL) md=m;
+	WHIRLPOOL_Init(&ctx);
+	WHIRLPOOL_Update(&ctx,inp,bytes);
+	WHIRLPOOL_Final(md,&ctx);
+	return(md);
+	}