/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


#define _RTL_DIGEST_C_ "$Revision: 1.9 $"

#include <sal/types.h>
#include <sal/macros.h>
#include <osl/endian.h>
#include <rtl/alloc.h>
#include <rtl/memory.h>
#include <rtl/digest.h>

/*========================================================================
 *
 * rtlDigest internals.
 *
 *======================================================================*/
#define RTL_DIGEST_CREATE(T) ((T*)(rtl_allocateZeroMemory(sizeof(T))))

#define RTL_DIGEST_ROTL(a,n) (((a) << (n)) | ((a) >> (32 - (n))))

#define RTL_DIGEST_HTONL(l,c) \
	(*((c)++) = (sal_uInt8)(((l) >> 24L) & 0xff), \
	 *((c)++) = (sal_uInt8)(((l) >> 16L) & 0xff), \
	 *((c)++) = (sal_uInt8)(((l) >>  8L) & 0xff), \
	 *((c)++) = (sal_uInt8)(((l)       ) & 0xff))

#define RTL_DIGEST_LTOC(l,c) \
	(*((c)++) = (sal_uInt8)(((l)       ) & 0xff), \
	 *((c)++) = (sal_uInt8)(((l) >>  8L) & 0xff), \
	 *((c)++) = (sal_uInt8)(((l) >> 16L) & 0xff), \
	 *((c)++) = (sal_uInt8)(((l) >> 24L) & 0xff))

typedef rtlDigestError (SAL_CALL Digest_init_t) (
	void *ctx, const sal_uInt8 *Data, sal_uInt32 DatLen);

typedef void (SAL_CALL Digest_delete_t) (void *ctx);

typedef rtlDigestError (SAL_CALL Digest_update_t) (
	void *ctx, const void *Data, sal_uInt32 DatLen);

typedef rtlDigestError (SAL_CALL Digest_get_t) (
	void *ctx, sal_uInt8 *Buffer, sal_uInt32 BufLen);

typedef struct digest_impl_st
{
	rtlDigestAlgorithm  m_algorithm;
	sal_uInt32          m_length;

	Digest_init_t      *m_init;
	Digest_delete_t    *m_delete;
	Digest_update_t    *m_update;
	Digest_get_t       *m_get;
} Digest_Impl;

/*
 * __rtl_digest_swapLong.
 */
static void __rtl_digest_swapLong (sal_uInt32 *pData, sal_uInt32 nDatLen)
{
	register sal_uInt32 *X;
	register int         i, n;

	X = pData;
	n = nDatLen;

	for (i = 0; i < n; i++)
		X[i] = OSL_SWAPDWORD(X[i]);
}

/*========================================================================
 *
 * rtlDigest implementation.
 *
 *======================================================================*/
/*
 * rtl_digest_create.
 */
rtlDigest SAL_CALL rtl_digest_create (rtlDigestAlgorithm Algorithm)
{
	rtlDigest Digest = (rtlDigest)NULL;
	switch (Algorithm)
	{
		case rtl_Digest_AlgorithmMD2:
			Digest = rtl_digest_createMD2();
			break;

		case rtl_Digest_AlgorithmMD5:
			Digest = rtl_digest_createMD5();
			break;

		case rtl_Digest_AlgorithmSHA:
			Digest = rtl_digest_createSHA();
			break;

		case rtl_Digest_AlgorithmSHA1:
			Digest = rtl_digest_createSHA1();
			break;

		case rtl_Digest_AlgorithmHMAC_MD5:
			Digest = rtl_digest_createHMAC_MD5();
			break;

		case rtl_Digest_AlgorithmHMAC_SHA1:
			Digest = rtl_digest_createHMAC_SHA1();
			break;

		default: /* rtl_Digest_AlgorithmInvalid */
			break;
	}
	return Digest;
}

/*
 * rtl_digest_queryAlgorithm.
 */
rtlDigestAlgorithm SAL_CALL rtl_digest_queryAlgorithm (rtlDigest Digest)
{
	Digest_Impl *pImpl = (Digest_Impl *)Digest;
	if (pImpl)
		return pImpl->m_algorithm;
	else
		return rtl_Digest_AlgorithmInvalid;
}

/*
 * rtl_digest_queryLength.
 */
sal_uInt32 SAL_CALL rtl_digest_queryLength (rtlDigest Digest)
{
	Digest_Impl *pImpl = (Digest_Impl *)Digest;
	if (pImpl)
		return pImpl->m_length;
	else
		return 0;
}

/*
 * rtl_digest_init.
 */
rtlDigestError SAL_CALL rtl_digest_init (
	rtlDigest Digest, const sal_uInt8 *pData, sal_uInt32 nDatLen)
{
	Digest_Impl *pImpl = (Digest_Impl *)Digest;
	if (pImpl)
	{
		if (pImpl->m_init)
			return pImpl->m_init (Digest, pData, nDatLen);
		else
			return rtl_Digest_E_None;
	}
	return rtl_Digest_E_Argument;
}

/*
 * rtl_digest_update.
 */
rtlDigestError SAL_CALL rtl_digest_update (
	rtlDigest Digest, const void *pData, sal_uInt32 nDatLen)
{
	Digest_Impl *pImpl = (Digest_Impl *)Digest;
	if (pImpl && pImpl->m_update)
		return pImpl->m_update (Digest, pData, nDatLen);
	else
		return rtl_Digest_E_Argument;
}

/*
 * rtl_digest_get.
 */
rtlDigestError SAL_CALL rtl_digest_get (
	rtlDigest Digest, sal_uInt8 *pBuffer, sal_uInt32 nBufLen)
{
	Digest_Impl *pImpl = (Digest_Impl *)Digest;
	if (pImpl && pImpl->m_get)
		return pImpl->m_get (Digest, pBuffer, nBufLen);
	else
		return rtl_Digest_E_Argument;
}

/*
 * rtl_digest_destroy.
 */
void SAL_CALL rtl_digest_destroy (rtlDigest Digest)
{
	Digest_Impl *pImpl = (Digest_Impl *)Digest;
	if (pImpl && pImpl->m_delete)
		pImpl->m_delete (Digest);
}

/*========================================================================
 *
 * rtl_digest_MD2 internals.
 *
 *======================================================================*/
#define DIGEST_CBLOCK_MD2 16
#define DIGEST_LBLOCK_MD2 16

typedef struct digestMD2_context_st
{
	sal_uInt32 m_nDatLen;
	sal_uInt8  m_pData[DIGEST_CBLOCK_MD2];
	sal_uInt32 m_state[DIGEST_LBLOCK_MD2];
	sal_uInt32 m_chksum[DIGEST_LBLOCK_MD2];
} DigestContextMD2;

typedef struct digestMD2_impl_st
{
	Digest_Impl      m_digest;
	DigestContextMD2 m_context;
} DigestMD2_Impl;

static void __rtl_digest_initMD2   (DigestContextMD2 *ctx);
static void __rtl_digest_updateMD2 (DigestContextMD2 *ctx);
static void __rtl_digest_endMD2    (DigestContextMD2 *ctx);

static const sal_uInt32 S[256] =
{
	0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01,
	0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13,
	0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C,
	0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA,
	0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16,
	0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12,
	0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49,
	0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A,
	0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F,
	0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
	0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27,
	0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03,
	0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1,
	0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6,
	0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6,
	0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1,
	0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20,
	0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02,
	0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6,
	0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
	0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A,
	0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26,
	0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09,
	0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52,
	0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA,
	0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A,
	0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D,
	0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39,
	0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4,
	0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
	0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A,
	0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14,
};

/*
 * __rtl_digest_MD2.
 */
static const Digest_Impl __rtl_digest_MD2 =
{
	rtl_Digest_AlgorithmMD2,
	RTL_DIGEST_LENGTH_MD2,

	NULL,
	rtl_digest_destroyMD2,
	rtl_digest_updateMD2,
	rtl_digest_getMD2
};

/*
 * __rtl_digest_initMD2.
 */
static void __rtl_digest_initMD2 (DigestContextMD2 *ctx)
{
	rtl_zeroMemory (ctx, sizeof (DigestContextMD2));
}

/*
 * __rtl_digest_updateMD2.
 */
static void __rtl_digest_updateMD2 (DigestContextMD2 *ctx)
{
	register sal_uInt8  *X;
	register sal_uInt32 *sp1, *sp2;
	register sal_uInt32  i, k, t;

	sal_uInt32 state[48];

	X   = ctx->m_pData;
	sp1 = ctx->m_state;
	sp2 = ctx->m_chksum;

	k = sp2[DIGEST_LBLOCK_MD2 - 1];
	for (i = 0; i < 16; i++)
	{
		state[i +  0] = sp1[i];
		state[i + 16] = t = X[i];
		state[i + 32] = t ^ sp1[i];
		k = sp2[i] ^= S[t^k];
	}

	t = 0;
	for (i = 0; i < 18; i++)
	{
		for (k = 0; k < 48; k += 8)
		{
			t = state[k + 0] ^= S[t];
			t = state[k + 1] ^= S[t];
			t = state[k + 2] ^= S[t];
			t = state[k + 3] ^= S[t];
			t = state[k + 4] ^= S[t];
			t = state[k + 5] ^= S[t];
			t = state[k + 6] ^= S[t];
			t = state[k + 7] ^= S[t];
		}
		t = ((t + i) & 0xff);
	}

	rtl_copyMemory (sp1, state, 16 * sizeof(sal_uInt32));
	rtl_zeroMemory (state, 48 * sizeof(sal_uInt32));
}

/*
 * __rtl_digest_endMD2.
 */
static void __rtl_digest_endMD2 (DigestContextMD2 *ctx)
{
	register sal_uInt8  *X;
	register sal_uInt32 *C;
	sal_uInt32           i, n;

	X = ctx->m_pData;
	C = ctx->m_chksum;
	n = DIGEST_CBLOCK_MD2 - ctx->m_nDatLen;

	for (i = ctx->m_nDatLen; i < DIGEST_CBLOCK_MD2; i++)
		X[i] = (sal_uInt8)(n & 0xff);
	__rtl_digest_updateMD2 (ctx);

	for (i = 0; i < DIGEST_CBLOCK_MD2; i++)
		X[i] = (sal_uInt8)(C[i] & 0xff);
	__rtl_digest_updateMD2 (ctx);
}

/*========================================================================
 *
 * rtl_digest_MD2 implementation.
 *
 *======================================================================*/
/*
 * rtl_digest_MD2.
 */
rtlDigestError SAL_CALL rtl_digest_MD2 (
	const void *pData,   sal_uInt32 nDatLen,
	sal_uInt8  *pBuffer, sal_uInt32 nBufLen)
{
	DigestMD2_Impl digest;
	rtlDigestError result;

	digest.m_digest = __rtl_digest_MD2;
	__rtl_digest_initMD2 (&(digest.m_context));

	result = rtl_digest_updateMD2 (&digest, pData, nDatLen);
	if (result == rtl_Digest_E_None)
		result = rtl_digest_getMD2 (&digest, pBuffer, nBufLen);

	rtl_zeroMemory (&digest, sizeof (digest));
	return (result);
}

/*
 * rtl_digest_createMD2.
 */
rtlDigest SAL_CALL rtl_digest_createMD2 (void)
{
	DigestMD2_Impl *pImpl = (DigestMD2_Impl*)NULL;
	pImpl = RTL_DIGEST_CREATE(DigestMD2_Impl);
	if (pImpl)
	{
		pImpl->m_digest = __rtl_digest_MD2;
		__rtl_digest_initMD2 (&(pImpl->m_context));
	}
	return ((rtlDigest)pImpl);
}

/*
 * rtl_digest_updateMD2.
 */
rtlDigestError SAL_CALL rtl_digest_updateMD2 (
	rtlDigest Digest, const void *pData, sal_uInt32 nDatLen)
{
	DigestMD2_Impl   *pImpl = (DigestMD2_Impl *)Digest;
	const sal_uInt8  *d     = (const sal_uInt8 *)pData;

	DigestContextMD2 *ctx;

	if ((pImpl == NULL) || (pData == NULL))
		return rtl_Digest_E_Argument;

	if (!(pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmMD2))
		return rtl_Digest_E_Algorithm;

	if (nDatLen == 0)
		return rtl_Digest_E_None;

	ctx = &(pImpl->m_context);

	if (ctx->m_nDatLen)
	{
		sal_uInt8  *p = ctx->m_pData + ctx->m_nDatLen;
		sal_uInt32  n = DIGEST_CBLOCK_MD2 - ctx->m_nDatLen;

		if (nDatLen < n)
		{
			rtl_copyMemory (p, d, nDatLen);
			ctx->m_nDatLen += nDatLen;

			return rtl_Digest_E_None;
		}

		rtl_copyMemory (p, d, n);
		d       += n;
		nDatLen -= n;

		__rtl_digest_updateMD2 (ctx);
		ctx->m_nDatLen = 0;
	}

	while (nDatLen >= DIGEST_CBLOCK_MD2)
	{
		rtl_copyMemory (ctx->m_pData, d, DIGEST_CBLOCK_MD2);
		d       += DIGEST_CBLOCK_MD2;
		nDatLen -= DIGEST_CBLOCK_MD2;

		__rtl_digest_updateMD2 (ctx);
	}

	rtl_copyMemory (ctx->m_pData, d, nDatLen);
	ctx->m_nDatLen = nDatLen;

	return rtl_Digest_E_None;
}

/*
 * rtl_digest_getMD2.
 */
rtlDigestError SAL_CALL rtl_digest_getMD2 (
	rtlDigest Digest, sal_uInt8 *pBuffer, sal_uInt32 nBufLen)
{
	DigestMD2_Impl   *pImpl = (DigestMD2_Impl *)Digest;
	sal_uInt32        i;

	DigestContextMD2 *ctx;

	if ((pImpl == NULL) || (pBuffer == NULL))
		return rtl_Digest_E_Argument;

	if (!(pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmMD2))
		return rtl_Digest_E_Algorithm;

	if (!(pImpl->m_digest.m_length <= nBufLen))
		return rtl_Digest_E_BufferSize;

	ctx = &(pImpl->m_context);

	__rtl_digest_endMD2 (ctx);
	for (i = 0; i < DIGEST_CBLOCK_MD2; i++)
		pBuffer[i] = (sal_uInt8)(ctx->m_state[i] & 0xff);
	__rtl_digest_initMD2 (ctx);

	return rtl_Digest_E_None;
}

/*
 * rtl_digest_destroyMD2.
 */
void SAL_CALL rtl_digest_destroyMD2 (rtlDigest Digest)
{
	DigestMD2_Impl *pImpl = (DigestMD2_Impl *)Digest;
	if (pImpl)
	{
		if (pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmMD2)
			rtl_freeZeroMemory (pImpl, sizeof (DigestMD2_Impl));
		else
			rtl_freeMemory (pImpl);
	}
}

/*========================================================================
 *
 * rtl_digest_MD5 internals.
 *
 *======================================================================*/
#define DIGEST_CBLOCK_MD5 64
#define DIGEST_LBLOCK_MD5 16

typedef struct digestMD5_context_st
{
	sal_uInt32 m_nDatLen;
	sal_uInt32 m_pData[DIGEST_LBLOCK_MD5];
	sal_uInt32 m_nA, m_nB, m_nC, m_nD;
	sal_uInt32 m_nL, m_nH;
} DigestContextMD5;

typedef struct digestMD5_impl_st
{
	Digest_Impl      m_digest;
	DigestContextMD5 m_context;
} DigestMD5_Impl;

static void __rtl_digest_initMD5   (DigestContextMD5 *ctx);
static void __rtl_digest_updateMD5 (DigestContextMD5 *ctx);
static void __rtl_digest_endMD5    (DigestContextMD5 *ctx);

#define F(x,y,z) ((((y) ^ (z)) & (x)) ^ (z))
#define G(x,y,z) ((((x) ^ (y)) & (z)) ^ (y))
#define H(x,y,z) ((x) ^ (y) ^ (z))
#define I(x,y,z) (((x) | (~(z))) ^ (y))

#define R0(a,b,c,d,k,s,t) { \
	a += ((k) + (t) + F((b), (c), (d))); \
	a  = RTL_DIGEST_ROTL(a, s); \
	a += b; }

#define R1(a,b,c,d,k,s,t) { \
	a += ((k) + (t) + G((b), (c), (d))); \
	a  = RTL_DIGEST_ROTL(a, s); \
	a += b; }

#define R2(a,b,c,d,k,s,t) { \
	a += ((k) + (t) + H((b), (c), (d))); \
	a  = RTL_DIGEST_ROTL(a, s); \
	a += b; }

#define R3(a,b,c,d,k,s,t) { \
	a += ((k) + (t) + I((b), (c), (d))); \
	a  = RTL_DIGEST_ROTL(a, s); \
	a += b; }

/*
 * __rtl_digest_MD5.
 */
static const Digest_Impl __rtl_digest_MD5 =
{
	rtl_Digest_AlgorithmMD5,
	RTL_DIGEST_LENGTH_MD5,

	NULL,
	rtl_digest_destroyMD5,
	rtl_digest_updateMD5,
	rtl_digest_getMD5
};

/*
 * __rtl_digest_initMD5.
 */
static void __rtl_digest_initMD5 (DigestContextMD5 *ctx)
{
	rtl_zeroMemory (ctx, sizeof (DigestContextMD5));

	ctx->m_nA = (sal_uInt32)0x67452301L;
	ctx->m_nB = (sal_uInt32)0xefcdab89L;
	ctx->m_nC = (sal_uInt32)0x98badcfeL;
	ctx->m_nD = (sal_uInt32)0x10325476L;
}

/*
 * __rtl_digest_updateMD5.
 */
static void __rtl_digest_updateMD5 (DigestContextMD5 *ctx)
{
	register sal_uInt32  A, B, C, D;
	register sal_uInt32 *X;

	A = ctx->m_nA;
	B = ctx->m_nB;
	C = ctx->m_nC;
	D = ctx->m_nD;
	X = ctx->m_pData;

	R0 (A, B, C, D, X[ 0],  7, 0xd76aa478L);
	R0 (D, A, B, C, X[ 1], 12, 0xe8c7b756L);
	R0 (C, D, A, B, X[ 2], 17, 0x242070dbL);
	R0 (B, C, D, A, X[ 3], 22, 0xc1bdceeeL);
	R0 (A, B, C, D, X[ 4],  7, 0xf57c0fafL);
	R0 (D, A, B, C, X[ 5], 12, 0x4787c62aL);
	R0 (C, D, A, B, X[ 6], 17, 0xa8304613L);
	R0 (B, C, D, A, X[ 7], 22, 0xfd469501L);
	R0 (A, B, C, D, X[ 8],  7, 0x698098d8L);
	R0 (D, A, B, C, X[ 9], 12, 0x8b44f7afL);
	R0 (C, D, A, B, X[10], 17, 0xffff5bb1L);
	R0 (B, C, D, A, X[11], 22, 0x895cd7beL);
	R0 (A, B, C, D, X[12],  7, 0x6b901122L);
	R0 (D, A, B, C, X[13], 12, 0xfd987193L);
	R0 (C, D, A, B, X[14], 17, 0xa679438eL);
	R0 (B, C, D, A, X[15], 22, 0x49b40821L);

	R1 (A, B, C, D, X[ 1],  5, 0xf61e2562L);
	R1 (D, A, B, C, X[ 6],  9, 0xc040b340L);
	R1 (C, D, A, B, X[11], 14, 0x265e5a51L);
	R1 (B, C, D, A, X[ 0], 20, 0xe9b6c7aaL);
	R1 (A, B, C, D, X[ 5],  5, 0xd62f105dL);
	R1 (D, A, B, C, X[10],  9, 0x02441453L);
	R1 (C, D, A, B, X[15], 14, 0xd8a1e681L);
	R1 (B, C, D, A, X[ 4], 20, 0xe7d3fbc8L);
	R1 (A, B, C, D, X[ 9],  5, 0x21e1cde6L);
	R1 (D, A, B, C, X[14],  9, 0xc33707d6L);
	R1 (C, D, A, B, X[ 3], 14, 0xf4d50d87L);
	R1 (B, C, D, A, X[ 8], 20, 0x455a14edL);
	R1 (A, B, C, D, X[13],  5, 0xa9e3e905L);
	R1 (D, A, B, C, X[ 2],  9, 0xfcefa3f8L);
	R1 (C, D, A, B, X[ 7], 14, 0x676f02d9L);
	R1 (B, C, D, A, X[12], 20, 0x8d2a4c8aL);

	R2 (A, B, C, D, X[ 5],  4, 0xfffa3942L);
	R2 (D, A, B, C, X[ 8], 11, 0x8771f681L);
	R2 (C, D, A, B, X[11], 16, 0x6d9d6122L);
	R2 (B, C, D, A, X[14], 23, 0xfde5380cL);
	R2 (A, B, C, D, X[ 1],  4, 0xa4beea44L);
	R2 (D, A, B, C, X[ 4], 11, 0x4bdecfa9L);
	R2 (C, D, A, B, X[ 7], 16, 0xf6bb4b60L);
	R2 (B, C, D, A, X[10], 23, 0xbebfbc70L);
	R2 (A, B, C, D, X[13],  4, 0x289b7ec6L);
	R2 (D, A, B, C, X[ 0], 11, 0xeaa127faL);
	R2 (C, D, A, B, X[ 3], 16, 0xd4ef3085L);
	R2 (B, C, D, A, X[ 6], 23, 0x04881d05L);
	R2 (A, B, C, D, X[ 9],  4, 0xd9d4d039L);
	R2 (D, A, B, C, X[12], 11, 0xe6db99e5L);
	R2 (C, D, A, B, X[15], 16, 0x1fa27cf8L);
	R2 (B, C, D, A, X[ 2], 23, 0xc4ac5665L);

	R3 (A, B, C, D, X[ 0],  6, 0xf4292244L);
	R3 (D, A, B, C, X[ 7], 10, 0x432aff97L);
	R3 (C, D, A, B, X[14], 15, 0xab9423a7L);
	R3 (B, C, D, A, X[ 5], 21, 0xfc93a039L);
	R3 (A, B, C, D, X[12],  6, 0x655b59c3L);
	R3 (D, A, B, C, X[ 3], 10, 0x8f0ccc92L);
	R3 (C, D, A, B, X[10], 15, 0xffeff47dL);
	R3 (B, C, D, A, X[ 1], 21, 0x85845dd1L);
	R3 (A, B, C, D, X[ 8],  6, 0x6fa87e4fL);
	R3 (D, A, B, C, X[15], 10, 0xfe2ce6e0L);
	R3 (C, D, A, B, X[ 6], 15, 0xa3014314L);
	R3 (B, C, D, A, X[13], 21, 0x4e0811a1L);
	R3 (A, B, C, D, X[ 4],  6, 0xf7537e82L);
	R3 (D, A, B, C, X[11], 10, 0xbd3af235L);
	R3 (C, D, A, B, X[ 2], 15, 0x2ad7d2bbL);
	R3 (B, C, D, A, X[ 9], 21, 0xeb86d391L);

	ctx->m_nA += A;
	ctx->m_nB += B;
	ctx->m_nC += C;
	ctx->m_nD += D;
}

/*
 * __rtl_digest_endMD5.
 */
static void __rtl_digest_endMD5 (DigestContextMD5 *ctx)
{
	static const sal_uInt8 end[4] =
	{
		0x80, 0x00, 0x00, 0x00
	};
	register const sal_uInt8 *p = end;
	
	register sal_uInt32 *X;
	register int         i;

	X = ctx->m_pData;
	i = (ctx->m_nDatLen >> 2);

#ifdef OSL_BIGENDIAN
	__rtl_digest_swapLong (X, i + 1);
#endif /* OSL_BIGENDIAN */

	switch (ctx->m_nDatLen & 0x03)
	{
		case 1: X[i] &= 0x000000ff; break;
		case 2: X[i] &= 0x0000ffff; break;
		case 3: X[i] &= 0x00ffffff; break;
	}

	switch (ctx->m_nDatLen & 0x03)
	{
		case 0: X[i]  = ((sal_uInt32)(*(p++))) <<  0L;
		case 1: X[i] |= ((sal_uInt32)(*(p++))) <<  8L;
		case 2: X[i] |= ((sal_uInt32)(*(p++))) << 16L;
		case 3: X[i] |= ((sal_uInt32)(*(p++))) << 24L;
	}

	i += 1;

	if (i >= (DIGEST_LBLOCK_MD5 - 2))
	{
		for (; i < DIGEST_LBLOCK_MD5; i++)
			X[i] = 0;
		__rtl_digest_updateMD5 (ctx);
		i = 0;
	}

	for (; i < (DIGEST_LBLOCK_MD5 - 2); i++)
		X[i] = 0;

	X[DIGEST_LBLOCK_MD5 - 2] = ctx->m_nL;
	X[DIGEST_LBLOCK_MD5 - 1] = ctx->m_nH;

	__rtl_digest_updateMD5 (ctx);
}

/*========================================================================
 *
 * rtl_digest_MD5 implementation.
 *
 *======================================================================*/
/*
 * rtl_digest_MD5.
 */
rtlDigestError SAL_CALL rtl_digest_MD5 (
	const void *pData,   sal_uInt32 nDatLen,
	sal_uInt8  *pBuffer, sal_uInt32 nBufLen)
{
	DigestMD5_Impl digest;
	rtlDigestError result;

	digest.m_digest = __rtl_digest_MD5;
	__rtl_digest_initMD5 (&(digest.m_context));

	result = rtl_digest_update (&digest, pData, nDatLen);
	if (result == rtl_Digest_E_None)
		result = rtl_digest_getMD5 (&digest, pBuffer, nBufLen);

	rtl_zeroMemory (&digest, sizeof (digest));
	return (result);
}

/*
 * rtl_digest_createMD5.
 */
rtlDigest SAL_CALL rtl_digest_createMD5 (void)
{
	DigestMD5_Impl *pImpl = (DigestMD5_Impl*)NULL;
	pImpl = RTL_DIGEST_CREATE(DigestMD5_Impl);
	if (pImpl)
	{
		pImpl->m_digest = __rtl_digest_MD5;
		__rtl_digest_initMD5 (&(pImpl->m_context));
	}
	return ((rtlDigest)pImpl);
}

/*
 * rtl_digest_updateMD5.
 */
rtlDigestError SAL_CALL rtl_digest_updateMD5 (
	rtlDigest Digest, const void *pData, sal_uInt32 nDatLen)
{
	DigestMD5_Impl   *pImpl = (DigestMD5_Impl *)Digest;
	const sal_uInt8  *d     = (const sal_uInt8 *)pData;

	DigestContextMD5 *ctx;
	sal_uInt32        len;

	if ((pImpl == NULL) || (pData == NULL))
		return rtl_Digest_E_Argument;

	if (!(pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmMD5))
		return rtl_Digest_E_Algorithm;

	if (nDatLen == 0)
		return rtl_Digest_E_None;

	ctx = &(pImpl->m_context);

	len = ctx->m_nL + (nDatLen << 3);
	if (len < ctx->m_nL) ctx->m_nH += 1;
	ctx->m_nH += (nDatLen >> 29);
	ctx->m_nL  = len;

	if (ctx->m_nDatLen)
	{
		sal_uInt8  *p = (sal_uInt8 *)(ctx->m_pData) + ctx->m_nDatLen;
		sal_uInt32  n = DIGEST_CBLOCK_MD5 - ctx->m_nDatLen;

		if (nDatLen < n)
		{
			rtl_copyMemory (p, d, nDatLen);
			ctx->m_nDatLen += nDatLen;

			return rtl_Digest_E_None;
		}

		rtl_copyMemory (p, d, n);
		d       += n;
		nDatLen -= n;

#ifdef OSL_BIGENDIAN
		__rtl_digest_swapLong (ctx->m_pData, DIGEST_LBLOCK_MD5);
#endif /* OSL_BIGENDIAN */

		__rtl_digest_updateMD5 (ctx);
		ctx->m_nDatLen = 0;
	}

	while (nDatLen >= DIGEST_CBLOCK_MD5)
	{
		rtl_copyMemory (ctx->m_pData, d, DIGEST_CBLOCK_MD5);
		d       += DIGEST_CBLOCK_MD5;
		nDatLen -= DIGEST_CBLOCK_MD5;

#ifdef OSL_BIGENDIAN
		__rtl_digest_swapLong (ctx->m_pData, DIGEST_LBLOCK_MD5);
#endif /* OSL_BIGENDIAN */

		__rtl_digest_updateMD5 (ctx);
	}

	rtl_copyMemory (ctx->m_pData, d, nDatLen);
	ctx->m_nDatLen = nDatLen;

	return rtl_Digest_E_None;
}

/*
 * rtl_digest_getMD5.
 */
rtlDigestError SAL_CALL rtl_digest_getMD5 (
	rtlDigest Digest, sal_uInt8 *pBuffer, sal_uInt32 nBufLen)
{
	DigestMD5_Impl   *pImpl = (DigestMD5_Impl *)Digest;
	sal_uInt8        *p     = pBuffer;

	DigestContextMD5 *ctx;

	if ((pImpl == NULL) || (pBuffer == NULL))
		return rtl_Digest_E_Argument;

	if (!(pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmMD5))
		return rtl_Digest_E_Algorithm;

	if (!(pImpl->m_digest.m_length <= nBufLen))
		return rtl_Digest_E_BufferSize;

	ctx = &(pImpl->m_context);

	__rtl_digest_endMD5 (ctx);
	RTL_DIGEST_LTOC (ctx->m_nA, p);
	RTL_DIGEST_LTOC (ctx->m_nB, p);
	RTL_DIGEST_LTOC (ctx->m_nC, p);
	RTL_DIGEST_LTOC (ctx->m_nD, p);
	__rtl_digest_initMD5 (ctx);

	return rtl_Digest_E_None;
}

/*
 * rtl_digest_rawMD5.
 */
rtlDigestError SAL_CALL rtl_digest_rawMD5 (
	rtlDigest Digest, sal_uInt8 *pBuffer, sal_uInt32 nBufLen)
{
	DigestMD5_Impl   *pImpl = (DigestMD5_Impl *)Digest;
	sal_uInt8        *p     = pBuffer;

	DigestContextMD5 *ctx;

	if ((pImpl == NULL) || (pBuffer == NULL))
		return rtl_Digest_E_Argument;

	if (!(pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmMD5))
		return rtl_Digest_E_Algorithm;

	if (!(pImpl->m_digest.m_length <= nBufLen))
		return rtl_Digest_E_BufferSize;

	ctx = &(pImpl->m_context);

	/* __rtl_digest_endMD5 (ctx); *//* not finalized */
	RTL_DIGEST_LTOC (ctx->m_nA, p);
	RTL_DIGEST_LTOC (ctx->m_nB, p);
	RTL_DIGEST_LTOC (ctx->m_nC, p);
	RTL_DIGEST_LTOC (ctx->m_nD, p);
	__rtl_digest_initMD5 (ctx);

	return rtl_Digest_E_None;
}

/*
 * rtl_digest_destroyMD5.
 */
void SAL_CALL rtl_digest_destroyMD5 (rtlDigest Digest)
{
	DigestMD5_Impl *pImpl = (DigestMD5_Impl *)Digest;
	if (pImpl)
	{
		if (pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmMD5)
			rtl_freeZeroMemory (pImpl, sizeof (DigestMD5_Impl));
		else
			rtl_freeMemory (pImpl);
	}
}

/*========================================================================
 *
 * rtl_digest_(SHA|SHA1) common internals.
 *
 *======================================================================*/
#define DIGEST_CBLOCK_SHA 64
#define DIGEST_LBLOCK_SHA 16

typedef sal_uInt32 DigestSHA_update_t (sal_uInt32 x);

static sal_uInt32 __rtl_digest_updateSHA_0 (sal_uInt32 x);
static sal_uInt32 __rtl_digest_updateSHA_1 (sal_uInt32 x);

typedef struct digestSHA_context_st
{
	DigestSHA_update_t *m_update;
	sal_uInt32          m_nDatLen;
	sal_uInt32          m_pData[DIGEST_LBLOCK_SHA];
	sal_uInt32          m_nA, m_nB, m_nC, m_nD, m_nE;
	sal_uInt32          m_nL, m_nH;
} DigestContextSHA;

typedef struct digestSHA_impl_st
{
	Digest_Impl      m_digest;
	DigestContextSHA m_context;
} DigestSHA_Impl;

static void __rtl_digest_initSHA (
	DigestContextSHA *ctx, DigestSHA_update_t *fct);

static void __rtl_digest_updateSHA (DigestContextSHA *ctx);
static void __rtl_digest_endSHA    (DigestContextSHA *ctx);

#define K_00_19 (sal_uInt32)0x5a827999L
#define K_20_39 (sal_uInt32)0x6ed9eba1L
#define K_40_59 (sal_uInt32)0x8f1bbcdcL
#define K_60_79 (sal_uInt32)0xca62c1d6L

#define F_00_19(b,c,d) ((((c) ^ (d)) & (b)) ^ (d))
#define F_20_39(b,c,d) ((b) ^ (c) ^ (d))
#define F_40_59(b,c,d) (((b) & (c)) | ((b) & (d)) | ((c) & (d)))
#define F_60_79(b,c,d) F_20_39(b,c,d)

#define BODY_X(i) \
    (X[(i)&0x0f] ^ X[((i)+2)&0x0f] ^ X[((i)+8)&0x0f] ^ X[((i)+13)&0x0f])

#define BODY_00_15(u,i,a,b,c,d,e,f) \
	(f)  = X[i]; \
	(f) += (e) + K_00_19 + RTL_DIGEST_ROTL((a), 5) + F_00_19((b), (c), (d)); \
	(b)  = RTL_DIGEST_ROTL((b), 30);

#define BODY_16_19(u,i,a,b,c,d,e,f) \
    (f)  = BODY_X((i)); \
	(f)  = X[(i)&0x0f] = (u)((f)); \
	(f) += (e) + K_00_19 + RTL_DIGEST_ROTL((a), 5) + F_00_19((b), (c), (d)); \
	(b)  = RTL_DIGEST_ROTL((b), 30);

#define BODY_20_39(u,i,a,b,c,d,e,f) \
    (f)  = BODY_X((i)); \
	(f)  = X[(i)&0x0f] = (u)((f)); \
	(f) += (e) + K_20_39 + RTL_DIGEST_ROTL((a), 5) + F_20_39((b), (c), (d)); \
	(b)  = RTL_DIGEST_ROTL((b), 30);

#define BODY_40_59(u,i,a,b,c,d,e,f) \
    (f)  = BODY_X((i)); \
	(f)  = X[(i)&0x0f] = (u)((f)); \
	(f) += (e) + K_40_59 + RTL_DIGEST_ROTL((a), 5) + F_40_59((b), (c), (d)); \
	(b)  = RTL_DIGEST_ROTL((b), 30);

#define BODY_60_79(u,i,a,b,c,d,e,f) \
    (f)  = BODY_X((i)); \
	(f)  = X[(i)&0x0f] = (u)((f)); \
	(f) += (e) + K_60_79 + RTL_DIGEST_ROTL((a), 5) + F_60_79((b), (c), (d)); \
	(b)  = RTL_DIGEST_ROTL((b), 30);

/*
 * __rtl_digest_initSHA.
 */
static void __rtl_digest_initSHA (
	DigestContextSHA *ctx, DigestSHA_update_t *fct)
{
	rtl_zeroMemory (ctx, sizeof (DigestContextSHA));
	ctx->m_update = fct;

	ctx->m_nA = (sal_uInt32)0x67452301L;
	ctx->m_nB = (sal_uInt32)0xefcdab89L;
	ctx->m_nC = (sal_uInt32)0x98badcfeL;
	ctx->m_nD = (sal_uInt32)0x10325476L;
	ctx->m_nE = (sal_uInt32)0xc3d2e1f0L;
}

/*
 * __rtl_digest_updateSHA.
 */
static void __rtl_digest_updateSHA (DigestContextSHA *ctx)
{
	register sal_uInt32  A, B, C, D, E, T;
	register sal_uInt32 *X;

	register DigestSHA_update_t *U;
	U = ctx->m_update;

	A = ctx->m_nA;
	B = ctx->m_nB;
	C = ctx->m_nC;
	D = ctx->m_nD;
	E = ctx->m_nE;
	X = ctx->m_pData;

	BODY_00_15 (U,  0, A, B, C, D, E, T);
	BODY_00_15 (U,  1, T, A, B, C, D, E);
	BODY_00_15 (U,  2, E, T, A, B, C, D);
	BODY_00_15 (U,  3, D, E, T, A, B, C);
	BODY_00_15 (U,  4, C, D, E, T, A, B);
	BODY_00_15 (U,  5, B, C, D, E, T, A);
	BODY_00_15 (U,  6, A, B, C, D, E, T);
	BODY_00_15 (U,  7, T, A, B, C, D, E);
	BODY_00_15 (U,  8, E, T, A, B, C, D);
	BODY_00_15 (U,  9, D, E, T, A, B, C);
	BODY_00_15 (U, 10, C, D, E, T, A, B);
	BODY_00_15 (U, 11, B, C, D, E, T, A);
	BODY_00_15 (U, 12, A, B, C, D, E, T);
	BODY_00_15 (U, 13, T, A, B, C, D, E);
	BODY_00_15 (U, 14, E, T, A, B, C, D);
	BODY_00_15 (U, 15, D, E, T, A, B, C);
	BODY_16_19 (U, 16, C, D, E, T, A, B);
	BODY_16_19 (U, 17, B, C, D, E, T, A);
	BODY_16_19 (U, 18, A, B, C, D, E, T);
	BODY_16_19 (U, 19, T, A, B, C, D, E);

	BODY_20_39 (U, 20, E, T, A, B, C, D);
	BODY_20_39 (U, 21, D, E, T, A, B, C);
	BODY_20_39 (U, 22, C, D, E, T, A, B);
	BODY_20_39 (U, 23, B, C, D, E, T, A);
	BODY_20_39 (U, 24, A, B, C, D, E, T);
	BODY_20_39 (U, 25, T, A, B, C, D, E);
	BODY_20_39 (U, 26, E, T, A, B, C, D);
	BODY_20_39 (U, 27, D, E, T, A, B, C);
	BODY_20_39 (U, 28, C, D, E, T, A, B);
	BODY_20_39 (U, 29, B, C, D, E, T, A);
	BODY_20_39 (U, 30, A, B, C, D, E, T);
	BODY_20_39 (U, 31, T, A, B, C, D, E);
	BODY_20_39 (U, 32, E, T, A, B, C, D);
	BODY_20_39 (U, 33, D, E, T, A, B, C);
	BODY_20_39 (U, 34, C, D, E, T, A, B);
	BODY_20_39 (U, 35, B, C, D, E, T, A);
	BODY_20_39 (U, 36, A, B, C, D, E, T);
	BODY_20_39 (U, 37, T, A, B, C, D, E);
	BODY_20_39 (U, 38, E, T, A, B, C, D);
	BODY_20_39 (U, 39, D, E, T, A, B, C);

	BODY_40_59 (U, 40, C, D, E, T, A, B);
	BODY_40_59 (U, 41, B, C, D, E, T, A);
	BODY_40_59 (U, 42, A, B, C, D, E, T);
	BODY_40_59 (U, 43, T, A, B, C, D, E);
	BODY_40_59 (U, 44, E, T, A, B, C, D);
	BODY_40_59 (U, 45, D, E, T, A, B, C);
	BODY_40_59 (U, 46, C, D, E, T, A, B);
	BODY_40_59 (U, 47, B, C, D, E, T, A);
	BODY_40_59 (U, 48, A, B, C, D, E, T);
	BODY_40_59 (U, 49, T, A, B, C, D, E);
	BODY_40_59 (U, 50, E, T, A, B, C, D);
	BODY_40_59 (U, 51, D, E, T, A, B, C);
	BODY_40_59 (U, 52, C, D, E, T, A, B);
	BODY_40_59 (U, 53, B, C, D, E, T, A);
	BODY_40_59 (U, 54, A, B, C, D, E, T);
	BODY_40_59 (U, 55, T, A, B, C, D, E);
	BODY_40_59 (U, 56, E, T, A, B, C, D);
	BODY_40_59 (U, 57, D, E, T, A, B, C);
	BODY_40_59 (U, 58, C, D, E, T, A, B);
	BODY_40_59 (U, 59, B, C, D, E, T, A);

	BODY_60_79 (U, 60, A, B, C, D, E, T);
	BODY_60_79 (U, 61, T, A, B, C, D, E);
	BODY_60_79 (U, 62, E, T, A, B, C, D);
	BODY_60_79 (U, 63, D, E, T, A, B, C);
	BODY_60_79 (U, 64, C, D, E, T, A, B);
	BODY_60_79 (U, 65, B, C, D, E, T, A);
	BODY_60_79 (U, 66, A, B, C, D, E, T);
	BODY_60_79 (U, 67, T, A, B, C, D, E);
	BODY_60_79 (U, 68, E, T, A, B, C, D);
	BODY_60_79 (U, 69, D, E, T, A, B, C);
	BODY_60_79 (U, 70, C, D, E, T, A, B);
	BODY_60_79 (U, 71, B, C, D, E, T, A);
	BODY_60_79 (U, 72, A, B, C, D, E, T);
	BODY_60_79 (U, 73, T, A, B, C, D, E);
	BODY_60_79 (U, 74, E, T, A, B, C, D);
	BODY_60_79 (U, 75, D, E, T, A, B, C);
	BODY_60_79 (U, 76, C, D, E, T, A, B);
	BODY_60_79 (U, 77, B, C, D, E, T, A);
	BODY_60_79 (U, 78, A, B, C, D, E, T);
	BODY_60_79 (U, 79, T, A, B, C, D, E);

	ctx->m_nA += E;
	ctx->m_nB += T;
	ctx->m_nC += A;
	ctx->m_nD += B;
	ctx->m_nE += C;
}

/*
 * __rtl_digest_endSHA.
 */
static void __rtl_digest_endSHA (DigestContextSHA *ctx)
{
	static const sal_uInt8 end[4] =
	{
		0x80, 0x00, 0x00, 0x00
	};
	register const sal_uInt8 *p = end;
	
	register sal_uInt32 *X;
	register int         i;

	X = ctx->m_pData;
	i = (ctx->m_nDatLen >> 2);

#ifdef OSL_BIGENDIAN
	__rtl_digest_swapLong (X, i + 1);
#endif /* OSL_BIGENDIAN */

	switch (ctx->m_nDatLen & 0x03)
	{
		case 1: X[i] &= 0x000000ff; break;
		case 2: X[i] &= 0x0000ffff; break;
		case 3: X[i] &= 0x00ffffff; break;
	}

	switch (ctx->m_nDatLen & 0x03)
	{
		case 0: X[i]  = ((sal_uInt32)(*(p++))) <<  0L;
		case 1: X[i] |= ((sal_uInt32)(*(p++))) <<  8L;
		case 2: X[i] |= ((sal_uInt32)(*(p++))) << 16L;
		case 3: X[i] |= ((sal_uInt32)(*(p++))) << 24L;
	}

	__rtl_digest_swapLong (X, i + 1);

	i += 1;

	if (i >= (DIGEST_LBLOCK_SHA - 2))
	{
		for (; i < DIGEST_LBLOCK_SHA; i++)
			X[i] = 0;
		__rtl_digest_updateSHA (ctx);
		i = 0;
	}

	for (; i < (DIGEST_LBLOCK_SHA - 2); i++)
		X[i] = 0;

	X[DIGEST_LBLOCK_SHA - 2] = ctx->m_nH;
	X[DIGEST_LBLOCK_SHA - 1] = ctx->m_nL;

	__rtl_digest_updateSHA (ctx);
}

/*========================================================================
 *
 * rtl_digest_SHA internals.
 *
 *======================================================================*/
/*
 * __rtl_digest_SHA_0.
 */
static const Digest_Impl __rtl_digest_SHA_0 =
{
	rtl_Digest_AlgorithmSHA,
	RTL_DIGEST_LENGTH_SHA,

	NULL,
	rtl_digest_destroySHA,
	rtl_digest_updateSHA,
	rtl_digest_getSHA
};

/*
 * __rtl_digest_updateSHA_0.
 */
static sal_uInt32 __rtl_digest_updateSHA_0 (sal_uInt32 x)
{
	return x;
}

/*========================================================================
 *
 * rtl_digest_SHA implementation.
 *
 *======================================================================*/
/*
 * rtl_digest_SHA.
 */
rtlDigestError SAL_CALL rtl_digest_SHA (
	const void *pData,   sal_uInt32 nDatLen,
	sal_uInt8  *pBuffer, sal_uInt32 nBufLen)
{
	DigestSHA_Impl digest;
	rtlDigestError result;

	digest.m_digest = __rtl_digest_SHA_0;
	__rtl_digest_initSHA (&(digest.m_context), __rtl_digest_updateSHA_0);

	result = rtl_digest_updateSHA (&digest, pData, nDatLen);
	if (result == rtl_Digest_E_None)
		result = rtl_digest_getSHA (&digest, pBuffer, nBufLen);

	rtl_zeroMemory (&digest, sizeof (digest));
	return (result);
}

/*
 * rtl_digest_createSHA.
 */
rtlDigest SAL_CALL rtl_digest_createSHA (void)
{
	DigestSHA_Impl *pImpl = (DigestSHA_Impl*)NULL;
	pImpl = RTL_DIGEST_CREATE(DigestSHA_Impl);
	if (pImpl)
	{
		pImpl->m_digest = __rtl_digest_SHA_0;
		__rtl_digest_initSHA (&(pImpl->m_context), __rtl_digest_updateSHA_0);
	}
	return ((rtlDigest)pImpl);
}

/*
 * rtl_digest_updateSHA.
 */
rtlDigestError SAL_CALL rtl_digest_updateSHA (
	rtlDigest Digest, const void *pData, sal_uInt32 nDatLen)
{
	DigestSHA_Impl   *pImpl = (DigestSHA_Impl *)Digest;
	const sal_uInt8  *d     = (const sal_uInt8 *)pData;

	DigestContextSHA *ctx;
	sal_uInt32        len;

	if ((pImpl == NULL) || (pData == NULL))
		return rtl_Digest_E_Argument;

	if (!(pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmSHA))
		return rtl_Digest_E_Algorithm;

	if (nDatLen == 0)
		return rtl_Digest_E_None;

	ctx = &(pImpl->m_context);

	len = ctx->m_nL + (nDatLen << 3);
	if (len < ctx->m_nL) ctx->m_nH += 1;
	ctx->m_nH += (nDatLen >> 29);
	ctx->m_nL  = len;

	if (ctx->m_nDatLen)
	{
		sal_uInt8  *p = (sal_uInt8 *)(ctx->m_pData) + ctx->m_nDatLen;
		sal_uInt32  n = DIGEST_CBLOCK_SHA - ctx->m_nDatLen;

		if (nDatLen < n)
		{
			rtl_copyMemory (p, d, nDatLen);
			ctx->m_nDatLen += nDatLen;

			return rtl_Digest_E_None;
		}

		rtl_copyMemory (p, d, n);
		d       += n;
		nDatLen -= n;

#ifndef OSL_BIGENDIAN
		__rtl_digest_swapLong (ctx->m_pData, DIGEST_LBLOCK_SHA);
#endif /* OSL_BIGENDIAN */

		__rtl_digest_updateSHA (ctx);
		ctx->m_nDatLen = 0;
	}

	while (nDatLen >= DIGEST_CBLOCK_SHA)
	{
		rtl_copyMemory (ctx->m_pData, d, DIGEST_CBLOCK_SHA);
		d       += DIGEST_CBLOCK_SHA;
		nDatLen -= DIGEST_CBLOCK_SHA;

#ifndef OSL_BIGENDIAN
		__rtl_digest_swapLong (ctx->m_pData, DIGEST_LBLOCK_SHA);
#endif /* OSL_BIGENDIAN */

		__rtl_digest_updateSHA (ctx);
	}

	rtl_copyMemory (ctx->m_pData, d, nDatLen);
	ctx->m_nDatLen = nDatLen;

	return rtl_Digest_E_None;
}

/*
 * rtl_digest_getSHA.
 */
rtlDigestError SAL_CALL rtl_digest_getSHA (
	rtlDigest Digest, sal_uInt8 *pBuffer, sal_uInt32 nBufLen)
{
	DigestSHA_Impl   *pImpl = (DigestSHA_Impl *)Digest;
	sal_uInt8        *p     = pBuffer;

	DigestContextSHA *ctx;

	if ((pImpl == NULL) || (pBuffer == NULL))
		return rtl_Digest_E_Argument;

	if (!(pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmSHA))
		return rtl_Digest_E_Algorithm;

	if (!(pImpl->m_digest.m_length <= nBufLen))
		return rtl_Digest_E_BufferSize;

	ctx = &(pImpl->m_context);

	__rtl_digest_endSHA (ctx);
	RTL_DIGEST_HTONL (ctx->m_nA, p);
	RTL_DIGEST_HTONL (ctx->m_nB, p);
	RTL_DIGEST_HTONL (ctx->m_nC, p);
	RTL_DIGEST_HTONL (ctx->m_nD, p);
	RTL_DIGEST_HTONL (ctx->m_nE, p);
	__rtl_digest_initSHA (ctx, __rtl_digest_updateSHA_0);

	return rtl_Digest_E_None;
}

/*
 * rtl_digest_destroySHA.
 */
void SAL_CALL rtl_digest_destroySHA (rtlDigest Digest)
{
	DigestSHA_Impl *pImpl = (DigestSHA_Impl *)Digest;
	if (pImpl)
	{
		if (pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmSHA)
			rtl_freeZeroMemory (pImpl, sizeof (DigestSHA_Impl));
		else
			rtl_freeMemory (pImpl);
	}
}

/*========================================================================
 *
 * rtl_digest_SHA1 internals.
 *
 *======================================================================*/
/*
 * __rtl_digest_SHA_1.
 */
static const Digest_Impl __rtl_digest_SHA_1 =
{
	rtl_Digest_AlgorithmSHA1,
	RTL_DIGEST_LENGTH_SHA1,

	NULL,
	rtl_digest_destroySHA1,
	rtl_digest_updateSHA1,
	rtl_digest_getSHA1
};

/*
 * __rtl_digest_updateSHA_1.
 */
static sal_uInt32 __rtl_digest_updateSHA_1 (sal_uInt32 x)
{
	return RTL_DIGEST_ROTL (x, 1);
}

/*========================================================================
 *
 * rtl_digest_SHA1 implementation.
 *
 *======================================================================*/
/*
 * rtl_digest_SHA1.
 */
rtlDigestError SAL_CALL rtl_digest_SHA1 (
	const void *pData,   sal_uInt32 nDatLen,
	sal_uInt8  *pBuffer, sal_uInt32 nBufLen)
{
	DigestSHA_Impl digest;
	rtlDigestError result;

	digest.m_digest = __rtl_digest_SHA_1;
	__rtl_digest_initSHA (&(digest.m_context), __rtl_digest_updateSHA_1);

	result = rtl_digest_updateSHA1 (&digest, pData, nDatLen);
	if (result == rtl_Digest_E_None)
		result = rtl_digest_getSHA1 (&digest, pBuffer, nBufLen);

	rtl_zeroMemory (&digest, sizeof (digest));
	return (result);
}

/*
 * rtl_digest_createSHA1.
 */
rtlDigest SAL_CALL rtl_digest_createSHA1 (void)
{
	DigestSHA_Impl *pImpl = (DigestSHA_Impl*)NULL;
	pImpl = RTL_DIGEST_CREATE(DigestSHA_Impl);
	if (pImpl)
	{
		pImpl->m_digest = __rtl_digest_SHA_1;
		__rtl_digest_initSHA (&(pImpl->m_context), __rtl_digest_updateSHA_1);
	}
	return ((rtlDigest)pImpl);
}

/*
 * rtl_digest_updateSHA1.
 */
rtlDigestError SAL_CALL rtl_digest_updateSHA1 (
	rtlDigest Digest, const void *pData, sal_uInt32 nDatLen)
{
	DigestSHA_Impl   *pImpl = (DigestSHA_Impl *)Digest;
	const sal_uInt8  *d     = (const sal_uInt8 *)pData;

	DigestContextSHA *ctx;
	sal_uInt32        len;

	if ((pImpl == NULL) || (pData == NULL))
		return rtl_Digest_E_Argument;

	if (!(pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmSHA1))
		return rtl_Digest_E_Algorithm;

	if (nDatLen == 0)
		return rtl_Digest_E_None;

	ctx = &(pImpl->m_context);

	len = ctx->m_nL + (nDatLen << 3);
	if (len < ctx->m_nL) ctx->m_nH += 1;
	ctx->m_nH += (nDatLen >> 29);
	ctx->m_nL  = len;

	if (ctx->m_nDatLen)
	{
		sal_uInt8  *p = (sal_uInt8 *)(ctx->m_pData) + ctx->m_nDatLen;
		sal_uInt32  n = DIGEST_CBLOCK_SHA - ctx->m_nDatLen;

		if (nDatLen < n)
		{
			rtl_copyMemory (p, d, nDatLen);
			ctx->m_nDatLen += nDatLen;

			return rtl_Digest_E_None;
		}

		rtl_copyMemory (p, d, n);
		d       += n;
		nDatLen -= n;

#ifndef OSL_BIGENDIAN
		__rtl_digest_swapLong (ctx->m_pData, DIGEST_LBLOCK_SHA);
#endif /* OSL_BIGENDIAN */

		__rtl_digest_updateSHA (ctx);
		ctx->m_nDatLen = 0;
	}

	while (nDatLen >= DIGEST_CBLOCK_SHA)
	{
		rtl_copyMemory (ctx->m_pData, d, DIGEST_CBLOCK_SHA);
		d       += DIGEST_CBLOCK_SHA;
		nDatLen -= DIGEST_CBLOCK_SHA;

#ifndef OSL_BIGENDIAN
		__rtl_digest_swapLong (ctx->m_pData, DIGEST_LBLOCK_SHA);
#endif /* OSL_BIGENDIAN */

		__rtl_digest_updateSHA (ctx);
	}

	rtl_copyMemory (ctx->m_pData, d, nDatLen);
	ctx->m_nDatLen = nDatLen;

	return rtl_Digest_E_None;
}

/*
 * rtl_digest_getSHA1.
 */
rtlDigestError SAL_CALL rtl_digest_getSHA1 (
	rtlDigest Digest, sal_uInt8 *pBuffer, sal_uInt32 nBufLen)
{
	DigestSHA_Impl   *pImpl = (DigestSHA_Impl *)Digest;
	sal_uInt8        *p     = pBuffer;

	DigestContextSHA *ctx;

	if ((pImpl == NULL) || (pBuffer == NULL))
		return rtl_Digest_E_Argument;

	if (!(pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmSHA1))
		return rtl_Digest_E_Algorithm;

	if (!(pImpl->m_digest.m_length <= nBufLen))
		return rtl_Digest_E_BufferSize;

	ctx = &(pImpl->m_context);

	__rtl_digest_endSHA (ctx);
	RTL_DIGEST_HTONL (ctx->m_nA, p);
	RTL_DIGEST_HTONL (ctx->m_nB, p);
	RTL_DIGEST_HTONL (ctx->m_nC, p);
	RTL_DIGEST_HTONL (ctx->m_nD, p);
	RTL_DIGEST_HTONL (ctx->m_nE, p);
	__rtl_digest_initSHA (ctx, __rtl_digest_updateSHA_1);

	return rtl_Digest_E_None;
}

/*
 * rtl_digest_destroySHA1.
 */
void SAL_CALL rtl_digest_destroySHA1 (rtlDigest Digest)
{
	DigestSHA_Impl *pImpl = (DigestSHA_Impl *)Digest;
	if (pImpl)
	{
		if (pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmSHA1)
			rtl_freeZeroMemory (pImpl, sizeof (DigestSHA_Impl));
		else
			rtl_freeMemory (pImpl);
	}
}

/*========================================================================
 *
 * rtl_digest_HMAC_MD5 internals.
 *
 *======================================================================*/
#define DIGEST_CBLOCK_HMAC_MD5 64

typedef struct _contextHMAC_MD5_st
{
	DigestMD5_Impl m_hash;
	sal_uInt8      m_opad[DIGEST_CBLOCK_HMAC_MD5];
} ContextHMAC_MD5;

typedef struct _digestHMAC_MD5_impl_st
{
	Digest_Impl     m_digest;
	ContextHMAC_MD5 m_context;
} DigestHMAC_MD5_Impl;

static void __rtl_digest_initHMAC_MD5 (ContextHMAC_MD5 * ctx);
static void __rtl_digest_ipadHMAC_MD5 (ContextHMAC_MD5 * ctx);
static void __rtl_digest_opadHMAC_MD5 (ContextHMAC_MD5 * ctx);

/*
 * __rtl_digest_HMAC_MD5.
 */
static const Digest_Impl __rtl_digest_HMAC_MD5 =
{
	rtl_Digest_AlgorithmHMAC_MD5,
	RTL_DIGEST_LENGTH_MD5,

	rtl_digest_initHMAC_MD5,
	rtl_digest_destroyHMAC_MD5,
	rtl_digest_updateHMAC_MD5,
	rtl_digest_getHMAC_MD5
};

/*
 * __rtl_digest_initHMAC_MD5.
 */
static void __rtl_digest_initHMAC_MD5 (ContextHMAC_MD5 * ctx)
{
	DigestMD5_Impl *pImpl = &(ctx->m_hash);

	pImpl->m_digest = __rtl_digest_MD5;
	__rtl_digest_initMD5 (&(pImpl->m_context));

	rtl_zeroMemory (ctx->m_opad, DIGEST_CBLOCK_HMAC_MD5);
}

/*
 * __rtl_digest_ipadHMAC_MD5.
 */
static void __rtl_digest_ipadHMAC_MD5 (ContextHMAC_MD5 * ctx)
{
	register sal_uInt32 i;

	for (i = 0; i < DIGEST_CBLOCK_HMAC_MD5; i++)
		ctx->m_opad[i] ^= 0x36;
	rtl_digest_updateMD5 (
		&(ctx->m_hash), ctx->m_opad, DIGEST_CBLOCK_HMAC_MD5);
	for (i = 0; i < DIGEST_CBLOCK_HMAC_MD5; i++)
		ctx->m_opad[i] ^= 0x36;
}

/*
 * __rtl_digest_opadHMAC_MD5.
 */
static void __rtl_digest_opadHMAC_MD5 (ContextHMAC_MD5 * ctx)
{
	register sal_uInt32 i;

	for (i = 0; i < DIGEST_CBLOCK_HMAC_MD5; i++)
		ctx->m_opad[i] ^= 0x5c;
}

/*========================================================================
 *
 * rtl_digest_HMAC_MD5 implementation.
 *
 *======================================================================*/
/*
 * rtl_digest_HMAC_MD5.
 */
rtlDigestError SAL_CALL rtl_digest_HMAC_MD5 (
	const sal_uInt8 *pKeyData, sal_uInt32 nKeyLen,
	const void      *pData,    sal_uInt32 nDatLen,
	sal_uInt8       *pBuffer,  sal_uInt32 nBufLen)
{
	DigestHMAC_MD5_Impl digest;
	rtlDigestError      result;

	digest.m_digest = __rtl_digest_HMAC_MD5;

	result = rtl_digest_initHMAC_MD5 (&digest, pKeyData, nKeyLen);
	if (result == rtl_Digest_E_None)
	{
		result = rtl_digest_updateHMAC_MD5 (&digest, pData, nDatLen);
		if (result == rtl_Digest_E_None)
			result = rtl_digest_getHMAC_MD5 (&digest, pBuffer, nBufLen);
	}

	rtl_zeroMemory (&digest, sizeof (digest));
	return (result);
}

/*
 * rtl_digest_createHMAC_MD5.
 */
rtlDigest SAL_CALL rtl_digest_createHMAC_MD5 (void)
{
	DigestHMAC_MD5_Impl *pImpl = (DigestHMAC_MD5_Impl*)NULL;
	pImpl = RTL_DIGEST_CREATE(DigestHMAC_MD5_Impl);
	if (pImpl)
	{
		pImpl->m_digest = __rtl_digest_HMAC_MD5;
		__rtl_digest_initHMAC_MD5 (&(pImpl->m_context));
	}
	return ((rtlDigest)pImpl);
}

/*
 * rtl_digest_initHMAC_MD5.
 */
rtlDigestError SAL_CALL rtl_digest_initHMAC_MD5 (
	rtlDigest Digest, const sal_uInt8 *pKeyData, sal_uInt32 nKeyLen)
{
	DigestHMAC_MD5_Impl *pImpl = (DigestHMAC_MD5_Impl*)Digest;
	ContextHMAC_MD5     *ctx;

	if ((pImpl == NULL) || (pKeyData == NULL))
		return rtl_Digest_E_Argument;

	if (!(pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmHMAC_MD5))
		return rtl_Digest_E_Algorithm;

	ctx = &(pImpl->m_context);
	__rtl_digest_initHMAC_MD5 (ctx);

	if (nKeyLen > DIGEST_CBLOCK_HMAC_MD5)
	{
		/* Initialize 'opad' with hashed 'KeyData' */
		rtl_digest_updateMD5 (
			&(ctx->m_hash), pKeyData, nKeyLen);
		rtl_digest_getMD5 (
			&(ctx->m_hash), ctx->m_opad, RTL_DIGEST_LENGTH_MD5);
	}
	else
	{
		/* Initialize 'opad' with plain 'KeyData' */
		rtl_copyMemory (ctx->m_opad, pKeyData, nKeyLen);
	}

	__rtl_digest_ipadHMAC_MD5 (ctx);
	__rtl_digest_opadHMAC_MD5 (ctx);

	return rtl_Digest_E_None;
}

/*
 * rtl_digest_updateHMAC_MD5.
 */
rtlDigestError SAL_CALL rtl_digest_updateHMAC_MD5 (
	rtlDigest Digest, const void *pData, sal_uInt32 nDatLen)
{
	DigestHMAC_MD5_Impl *pImpl = (DigestHMAC_MD5_Impl*)Digest;
	ContextHMAC_MD5     *ctx;

	if ((pImpl == NULL) || (pData == NULL))
		return rtl_Digest_E_Argument;

	if (!(pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmHMAC_MD5))
		return rtl_Digest_E_Algorithm;

	ctx = &(pImpl->m_context);
	rtl_digest_updateMD5 (&(ctx->m_hash), pData, nDatLen);

	return rtl_Digest_E_None;
}

/*
 * rtl_digest_getHMAC_MD5.
 */
rtlDigestError SAL_CALL rtl_digest_getHMAC_MD5 (
	rtlDigest Digest, sal_uInt8 *pBuffer, sal_uInt32 nBufLen)
{
	DigestHMAC_MD5_Impl *pImpl = (DigestHMAC_MD5_Impl*)Digest;
	ContextHMAC_MD5     *ctx;

	if ((pImpl == NULL) || (pBuffer == NULL))
		return rtl_Digest_E_Argument;

	if (!(pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmHMAC_MD5))
		return rtl_Digest_E_Algorithm;

	if (!(pImpl->m_digest.m_length <= nBufLen))
		return rtl_Digest_E_BufferSize;

	nBufLen = pImpl->m_digest.m_length;

	ctx = &(pImpl->m_context);
	rtl_digest_getMD5 (&(ctx->m_hash), pBuffer, nBufLen);

	rtl_digest_updateMD5 (&(ctx->m_hash), ctx->m_opad, 64);
	rtl_digest_updateMD5 (&(ctx->m_hash), pBuffer, nBufLen);
	rtl_digest_getMD5    (&(ctx->m_hash), pBuffer, nBufLen);

	__rtl_digest_opadHMAC_MD5 (ctx);
	__rtl_digest_ipadHMAC_MD5 (ctx);
	__rtl_digest_opadHMAC_MD5 (ctx);

	return rtl_Digest_E_None;
}

/*
 * rtl_digest_destroyHMAC_MD5.
 */
void SAL_CALL rtl_digest_destroyHMAC_MD5 (rtlDigest Digest)
{
	DigestHMAC_MD5_Impl *pImpl = (DigestHMAC_MD5_Impl*)Digest;
	if (pImpl)
	{
		if (pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmHMAC_MD5)
			rtl_freeZeroMemory (pImpl, sizeof (DigestHMAC_MD5_Impl));
		else
			rtl_freeMemory (pImpl);
	}
}

/*========================================================================
 *
 * rtl_digest_HMAC_SHA1 internals.
 *
 *======================================================================*/
#define DIGEST_CBLOCK_HMAC_SHA1 64

typedef struct _contextHMAC_SHA1_st
{
	DigestSHA_Impl m_hash;
	sal_uInt8      m_opad[DIGEST_CBLOCK_HMAC_SHA1];
} ContextHMAC_SHA1;

typedef struct _digestHMAC_SHA1_impl_st
{
	Digest_Impl      m_digest;
	ContextHMAC_SHA1 m_context;
} DigestHMAC_SHA1_Impl;

static void __rtl_digest_initHMAC_SHA1 (ContextHMAC_SHA1 * ctx);
static void __rtl_digest_ipadHMAC_SHA1 (ContextHMAC_SHA1 * ctx);
static void __rtl_digest_opadHMAC_SHA1 (ContextHMAC_SHA1 * ctx);

/*
 * __rtl_digest_HMAC_SHA1.
 */
static const Digest_Impl __rtl_digest_HMAC_SHA1 =
{
	rtl_Digest_AlgorithmHMAC_SHA1,
	RTL_DIGEST_LENGTH_SHA1,

	rtl_digest_initHMAC_SHA1,
	rtl_digest_destroyHMAC_SHA1,
	rtl_digest_updateHMAC_SHA1,
	rtl_digest_getHMAC_SHA1
};

/*
 * __rtl_digest_initHMAC_SHA1.
 */
static void __rtl_digest_initHMAC_SHA1 (ContextHMAC_SHA1 * ctx)
{
	DigestSHA_Impl *pImpl = &(ctx->m_hash);

	pImpl->m_digest = __rtl_digest_SHA_1;
	__rtl_digest_initSHA (&(pImpl->m_context), __rtl_digest_updateSHA_1);

	rtl_zeroMemory (ctx->m_opad, DIGEST_CBLOCK_HMAC_SHA1);
}

/*
 * __rtl_digest_ipadHMAC_SHA1.
 */
static void __rtl_digest_ipadHMAC_SHA1 (ContextHMAC_SHA1 * ctx)
{
	register sal_uInt32 i;

	for (i = 0; i < DIGEST_CBLOCK_HMAC_SHA1; i++)
		ctx->m_opad[i] ^= 0x36;
	rtl_digest_updateSHA1 (
		&(ctx->m_hash), ctx->m_opad, DIGEST_CBLOCK_HMAC_SHA1);
	for (i = 0; i < DIGEST_CBLOCK_HMAC_SHA1; i++)
		ctx->m_opad[i] ^= 0x36;
}

/*
 * __rtl_digest_opadHMAC_SHA1.
 */
static void __rtl_digest_opadHMAC_SHA1 (ContextHMAC_SHA1 * ctx)
{
	register sal_uInt32 i;

	for (i = 0; i < DIGEST_CBLOCK_HMAC_SHA1; i++)
		ctx->m_opad[i] ^= 0x5c;
}

/*========================================================================
 *
 * rtl_digest_HMAC_SHA1 implementation.
 *
 *======================================================================*/
/*
 * rtl_digest_HMAC_SHA1.
 */
rtlDigestError SAL_CALL rtl_digest_HMAC_SHA1 (
	const sal_uInt8 *pKeyData, sal_uInt32 nKeyLen,
	const void      *pData,    sal_uInt32 nDatLen,
	sal_uInt8       *pBuffer,  sal_uInt32 nBufLen)
{
	DigestHMAC_SHA1_Impl digest;
	rtlDigestError       result;

	digest.m_digest = __rtl_digest_HMAC_SHA1;

	result = rtl_digest_initHMAC_SHA1 (&digest, pKeyData, nKeyLen);
	if (result == rtl_Digest_E_None)
	{
		result = rtl_digest_updateHMAC_SHA1 (&digest, pData, nDatLen);
		if (result == rtl_Digest_E_None)
			result = rtl_digest_getHMAC_SHA1 (&digest, pBuffer, nBufLen);
	}

	rtl_zeroMemory (&digest, sizeof (digest));
	return (result);
}

/*
 * rtl_digest_createHMAC_SHA1.
 */
rtlDigest SAL_CALL rtl_digest_createHMAC_SHA1 (void)
{
	DigestHMAC_SHA1_Impl *pImpl = (DigestHMAC_SHA1_Impl*)NULL;
	pImpl = RTL_DIGEST_CREATE(DigestHMAC_SHA1_Impl);
	if (pImpl)
	{
		pImpl->m_digest = __rtl_digest_HMAC_SHA1;
		__rtl_digest_initHMAC_SHA1 (&(pImpl->m_context));
	}
	return ((rtlDigest)pImpl);
}

/*
 * rtl_digest_initHMAC_SHA1.
 */
rtlDigestError SAL_CALL rtl_digest_initHMAC_SHA1 (
	rtlDigest Digest, const sal_uInt8 *pKeyData, sal_uInt32 nKeyLen)
{
	DigestHMAC_SHA1_Impl *pImpl = (DigestHMAC_SHA1_Impl*)Digest;
	ContextHMAC_SHA1     *ctx;

	if ((pImpl == NULL) || (pKeyData == NULL))
		return rtl_Digest_E_Argument;

	if (!(pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmHMAC_SHA1))
		return rtl_Digest_E_Algorithm;

	ctx = &(pImpl->m_context);
	__rtl_digest_initHMAC_SHA1 (ctx);

	if (nKeyLen > DIGEST_CBLOCK_HMAC_SHA1)
	{
		/* Initialize 'opad' with hashed 'KeyData' */
		rtl_digest_updateSHA1 (
			&(ctx->m_hash), pKeyData, nKeyLen);
		rtl_digest_getSHA1 (
			&(ctx->m_hash), ctx->m_opad, RTL_DIGEST_LENGTH_SHA1);
	}
	else
	{
		/* Initialize 'opad' with plain 'KeyData' */
		rtl_copyMemory (ctx->m_opad, pKeyData, nKeyLen);
	}

	__rtl_digest_ipadHMAC_SHA1 (ctx);
	__rtl_digest_opadHMAC_SHA1 (ctx);

	return rtl_Digest_E_None;
}

/*
 * rtl_digest_updateHMAC_SHA1.
 */
rtlDigestError SAL_CALL rtl_digest_updateHMAC_SHA1 (
	rtlDigest Digest, const void *pData, sal_uInt32 nDatLen)
{
	DigestHMAC_SHA1_Impl *pImpl = (DigestHMAC_SHA1_Impl*)Digest;
	ContextHMAC_SHA1     *ctx;

	if ((pImpl == NULL) || (pData == NULL))
		return rtl_Digest_E_Argument;

	if (!(pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmHMAC_SHA1))
		return rtl_Digest_E_Algorithm;

	ctx = &(pImpl->m_context);
	rtl_digest_updateSHA1 (&(ctx->m_hash), pData, nDatLen);

	return rtl_Digest_E_None;
}

/*
 * rtl_digest_getHMAC_SHA1.
 */
rtlDigestError SAL_CALL rtl_digest_getHMAC_SHA1 (
	rtlDigest Digest, sal_uInt8 *pBuffer, sal_uInt32 nBufLen)
{
	DigestHMAC_SHA1_Impl *pImpl = (DigestHMAC_SHA1_Impl*)Digest;
	ContextHMAC_SHA1     *ctx;

	if ((pImpl == NULL) || (pBuffer == NULL))
		return rtl_Digest_E_Argument;

	if (!(pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmHMAC_SHA1))
		return rtl_Digest_E_Algorithm;

	if (!(pImpl->m_digest.m_length <= nBufLen))
		return rtl_Digest_E_BufferSize;

	nBufLen = pImpl->m_digest.m_length;

	ctx = &(pImpl->m_context);
	rtl_digest_getSHA1 (&(ctx->m_hash), pBuffer, nBufLen);

	rtl_digest_updateSHA1 (&(ctx->m_hash), ctx->m_opad, sizeof(ctx->m_opad));
	rtl_digest_updateSHA1 (&(ctx->m_hash), pBuffer, nBufLen);
	rtl_digest_getSHA1    (&(ctx->m_hash), pBuffer, nBufLen);

	__rtl_digest_opadHMAC_SHA1 (ctx);
	__rtl_digest_ipadHMAC_SHA1 (ctx);
	__rtl_digest_opadHMAC_SHA1 (ctx);

	return rtl_Digest_E_None;
}

/*
 * rtl_digest_destroyHMAC_SHA1.
 */
void SAL_CALL rtl_digest_destroyHMAC_SHA1 (rtlDigest Digest)
{
	DigestHMAC_SHA1_Impl *pImpl = (DigestHMAC_SHA1_Impl*)Digest;
	if (pImpl)
	{
		if (pImpl->m_digest.m_algorithm == rtl_Digest_AlgorithmHMAC_SHA1)
			rtl_freeZeroMemory (pImpl, sizeof (DigestHMAC_SHA1_Impl));
		else
			rtl_freeMemory (pImpl);
	}
}

/*========================================================================
 *
 * rtl_digest_PBKDF2 internals.
 *
 *======================================================================*/
#define DIGEST_CBLOCK_PBKDF2 RTL_DIGEST_LENGTH_HMAC_SHA1

/*
 * __rtl_digest_updatePBKDF2.
 */
static void __rtl_digest_updatePBKDF2 (
	rtlDigest        hDigest,
	sal_uInt8        T[DIGEST_CBLOCK_PBKDF2],
	const sal_uInt8 *pSaltData, sal_uInt32 nSaltLen,
	sal_uInt32       nCount,    sal_uInt32 nIndex)
{
	/* T_i = F (P, S, c, i) */
	sal_uInt8 U[DIGEST_CBLOCK_PBKDF2];
	register  sal_uInt32 i, k;

	/* U_(1) = PRF (P, S || INDEX) */
	rtl_digest_updateHMAC_SHA1 (hDigest, pSaltData, nSaltLen);
	rtl_digest_updateHMAC_SHA1 (hDigest, &nIndex, sizeof(nIndex));
	rtl_digest_getHMAC_SHA1    (hDigest, U, DIGEST_CBLOCK_PBKDF2);

	/* T = U_(1) */
	for (k = 0; k < DIGEST_CBLOCK_PBKDF2; k++) T[k] = U[k];

	/* T ^= U_(2) ^ ... ^ U_(c) */
	for (i = 1; i < nCount; i++)
	{
		/* U_(i) = PRF (P, U_(i-1)) */
		rtl_digest_updateHMAC_SHA1 (hDigest, U, DIGEST_CBLOCK_PBKDF2);
		rtl_digest_getHMAC_SHA1    (hDigest, U, DIGEST_CBLOCK_PBKDF2);

		/* T ^= U_(i) */
		for (k = 0; k < DIGEST_CBLOCK_PBKDF2; k++) T[k] ^= U[k];
	}

	rtl_zeroMemory (U, DIGEST_CBLOCK_PBKDF2);
}

/*========================================================================
 *
 * rtl_digest_PBKDF2 implementation.
 *
 *======================================================================*/
/*
 * rtl_digest_PBKDF2.
 */
rtlDigestError SAL_CALL rtl_digest_PBKDF2 (
	sal_uInt8       *pKeyData , sal_uInt32 nKeyLen,
	const sal_uInt8 *pPassData, sal_uInt32 nPassLen,
	const sal_uInt8 *pSaltData, sal_uInt32 nSaltLen,
	sal_uInt32       nCount)
{
	DigestHMAC_SHA1_Impl digest;
	sal_uInt32           i = 1;

	if ((pKeyData == NULL) || (pPassData == NULL) || (pSaltData == NULL))
		return rtl_Digest_E_Argument;

	digest.m_digest = __rtl_digest_HMAC_SHA1;
	rtl_digest_initHMAC_SHA1 (&digest, pPassData, nPassLen);

	/* DK = T_(1) || T_(2) || ... || T_(l) */
	while (nKeyLen >= DIGEST_CBLOCK_PBKDF2)
	{
		/* T_(i) = F (P, S, c, i); DK ||= T_(i) */
		__rtl_digest_updatePBKDF2 (
			&digest, pKeyData,
			pSaltData, nSaltLen,
			nCount, OSL_NETDWORD(i));

		/* Next 'KeyData' block */
		pKeyData += DIGEST_CBLOCK_PBKDF2;
		nKeyLen  -= DIGEST_CBLOCK_PBKDF2;
		i += 1;
	}
	if (nKeyLen > 0)
	{
		/* Last 'KeyData' block */
		sal_uInt8 T[DIGEST_CBLOCK_PBKDF2];

		/* T_i = F (P, S, c, i) */
		__rtl_digest_updatePBKDF2 (
			&digest, T,
			pSaltData, nSaltLen,
			nCount, OSL_NETDWORD(i));

		/* DK ||= T_(i) */
		rtl_copyMemory (pKeyData, T, nKeyLen);
		rtl_zeroMemory (T, DIGEST_CBLOCK_PBKDF2);
	}

	rtl_zeroMemory (&digest, sizeof (digest));
	return rtl_Digest_E_None;
}

/*========================================================================
 *
 * The End.
 *
 *======================================================================*/