Sergey Pastor
Webserver+3d print
Diff: cyclone_crypto/md4.c
- Revision:
- 0:8918a71cdbe9
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/cyclone_crypto/md4.c Sat Feb 04 18:15:49 2017 +0000
@@ -0,0 +1,297 @@
+/**
+ * @file md4.c
+ * @brief MD4 (Message-Digest Algorithm)
+ *
+ * @section License
+ *
+ * Copyright (C) 2010-2017 Oryx Embedded SARL. All rights reserved.
+ *
+ * This file is part of CycloneCrypto Open.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * @section Description
+ *
+ * The MD4 algorithm takes as input a message of arbitrary length and produces
+ * as output a 128-bit message digest of the input. Refer to RFC 1320
+ *
+ * @author Oryx Embedded SARL (www.oryx-embedded.com)
+ * @version 1.7.6
+ **/
+
+//Switch to the appropriate trace level
+#define TRACE_LEVEL CRYPTO_TRACE_LEVEL
+
+//Dependencies
+#include <string.h>
+#include "crypto.h"
+#include "md4.h"
+
+//Check crypto library configuration
+#if (MD4_SUPPORT == ENABLED)
+
+//MD4 auxiliary functions
+#define F(x, y, z) (((x) & (y)) | (~(x) & (z)))
+#define G(x, y, z) (((x) & (y)) | ((x) & (z)) | ((y) & (z)))
+#define H(x, y, z) ((x) ^ (y) ^ (z))
+
+#define FF(a, b, c, d, x, s) a += F(b, c, d) + (x), a = ROL32(a, s)
+#define GG(a, b, c, d, x, s) a += G(b, c, d) + (x) + 0x5A827999, a = ROL32(a, s)
+#define HH(a, b, c, d, x, s) a += H(b, c, d) + (x) + 0x6ED9EBA1, a = ROL32(a, s)
+
+//MD4 padding
+static const uint8_t padding[64] =
+{
+ 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+//MD4 object identifier (1.2.840.113549.2.4)
+static const uint8_t md4Oid[] = {0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x02, 0x04};
+
+//Common interface for hash algorithms
+const HashAlgo md4HashAlgo =
+{
+ "MD4",
+ md4Oid,
+ sizeof(md4Oid),
+ sizeof(Md4Context),
+ MD4_BLOCK_SIZE,
+ MD4_DIGEST_SIZE,
+ (HashAlgoCompute) md4Compute,
+ (HashAlgoInit) md4Init,
+ (HashAlgoUpdate) md4Update,
+ (HashAlgoFinal) md4Final
+};
+
+
+/**
+ * @brief Digest a message using MD4
+ * @param[in] data Pointer to the message being hashed
+ * @param[in] length Length of the message
+ * @param[out] digest Pointer to the calculated digest
+ * @return Error code
+ **/
+
+error_t md4Compute(const void *data, size_t length, uint8_t *digest)
+{
+ //Allocate a memory buffer to hold the MD4 context
+ Md4Context *context = cryptoAllocMem(sizeof(Md4Context));
+ //Failed to allocate memory?
+ if(context == NULL)
+ return ERROR_OUT_OF_MEMORY;
+
+ //Initialize the MD4 context
+ md4Init(context);
+ //Digest the message
+ md4Update(context, data, length);
+ //Finalize the MD4 message digest
+ md4Final(context, digest);
+
+ //Free previously allocated memory
+ cryptoFreeMem(context);
+ //Successful processing
+ return NO_ERROR;
+}
+
+
+/**
+ * @brief Initialize MD4 message digest context
+ * @param[in] context Pointer to the MD4 context to initialize
+ **/
+
+void md4Init(Md4Context *context)
+{
+ //Set initial hash value
+ context->h[0] = 0x67452301;
+ context->h[1] = 0xEFCDAB89;
+ context->h[2] = 0x98BADCFE;
+ context->h[3] = 0x10325476;
+
+ //Number of bytes in the buffer
+ context->size = 0;
+ //Total length of the message
+ context->totalSize = 0;
+}
+
+
+/**
+ * @brief Update the MD4 context with a portion of the message being hashed
+ * @param[in] context Pointer to the MD4 context
+ * @param[in] data Pointer to the buffer being hashed
+ * @param[in] length Length of the buffer
+ **/
+
+void md4Update(Md4Context *context, const void *data, size_t length)
+{
+ size_t n;
+
+ //Process the incoming data
+ while(length > 0)
+ {
+ //The buffer can hold at most 64 bytes
+ n = MIN(length, 64 - context->size);
+
+ //Copy the data to the buffer
+ memcpy(context->buffer + context->size, data, n);
+
+ //Update the MD4 context
+ context->size += n;
+ context->totalSize += n;
+ //Advance the data pointer
+ data = (uint8_t *) data + n;
+ //Remaining bytes to process
+ length -= n;
+
+ //Process message in 16-word blocks
+ if(context->size == 64)
+ {
+ //Transform the 16-word block
+ md4ProcessBlock(context);
+ //Empty the buffer
+ context->size = 0;
+ }
+ }
+}
+
+
+/**
+ * @brief Finish the MD4 message digest
+ * @param[in] context Pointer to the MD4 context
+ * @param[out] digest Calculated digest (optional parameter)
+ **/
+
+void md4Final(Md4Context *context, uint8_t *digest)
+{
+ uint_t i;
+ size_t paddingSize;
+ uint64_t totalSize;
+
+ //Length of the original message (before padding)
+ totalSize = context->totalSize * 8;
+
+ //Pad the message so that its length is congruent to 56 modulo 64
+ if(context->size < 56)
+ paddingSize = 56 - context->size;
+ else
+ paddingSize = 64 + 56 - context->size;
+
+ //Append padding
+ md4Update(context, padding, paddingSize);
+
+ //Append the length of the original message
+ context->x[14] = htole32((uint32_t) totalSize);
+ context->x[15] = htole32((uint32_t) (totalSize >> 32));
+
+ //Calculate the message digest
+ md4ProcessBlock(context);
+
+ //Convert from host byte order to little-endian byte order
+ for(i = 0; i < 4; i++)
+ context->h[i] = htole32(context->h[i]);
+
+ //Copy the resulting digest
+ if(digest != NULL)
+ memcpy(digest, context->digest, MD4_DIGEST_SIZE);
+}
+
+
+/**
+ * @brief Process message in 16-word blocks
+ * @param[in] context Pointer to the MD4 context
+ **/
+
+void md4ProcessBlock(Md4Context *context)
+{
+ uint_t i;
+
+ //Initialize the 4 working registers
+ uint32_t a = context->h[0];
+ uint32_t b = context->h[1];
+ uint32_t c = context->h[2];
+ uint32_t d = context->h[3];
+
+ //Process message in 16-word blocks
+ uint32_t *x = context->x;
+
+ //Convert from little-endian byte order to host byte order
+ for(i = 0; i < 16; i++)
+ x[i] = letoh32(x[i]);
+
+ //Round 1
+ FF(a, b, c, d, x[0], 3);
+ FF(d, a, b, c, x[1], 7);
+ FF(c, d, a, b, x[2], 11);
+ FF(b, c, d, a, x[3], 19);
+ FF(a, b, c, d, x[4], 3);
+ FF(d, a, b, c, x[5], 7);
+ FF(c, d, a, b, x[6], 11);
+ FF(b, c, d, a, x[7], 19);
+ FF(a, b, c, d, x[8], 3);
+ FF(d, a, b, c, x[9], 7);
+ FF(c, d, a, b, x[10], 11);
+ FF(b, c, d, a, x[11], 19);
+ FF(a, b, c, d, x[12], 3);
+ FF(d, a, b, c, x[13], 7);
+ FF(c, d, a, b, x[14], 11);
+ FF(b, c, d, a, x[15], 19);
+
+ //Round 2
+ GG(a, b, c, d, x[0], 3);
+ GG(d, a, b, c, x[4], 5);
+ GG(c, d, a, b, x[8], 9);
+ GG(b, c, d, a, x[12], 13);
+ GG(a, b, c, d, x[1], 3);
+ GG(d, a, b, c, x[5], 5);
+ GG(c, d, a, b, x[9], 9);
+ GG(b, c, d, a, x[13], 13);
+ GG(a, b, c, d, x[2], 3);
+ GG(d, a, b, c, x[6], 5);
+ GG(c, d, a, b, x[10], 9);
+ GG(b, c, d, a, x[14], 13);
+ GG(a, b, c, d, x[3], 3);
+ GG(d, a, b, c, x[7], 5);
+ GG(c, d, a, b, x[11], 9);
+ GG(b, c, d, a, x[15], 13);
+
+ //Round 3
+ HH(a, b, c, d, x[0], 3);
+ HH(d, a, b, c, x[8], 9);
+ HH(c, d, a, b, x[4], 11);
+ HH(b, c, d, a, x[12], 15);
+ HH(a, b, c, d, x[2], 3);
+ HH(d, a, b, c, x[10], 9);
+ HH(c, d, a, b, x[6], 11);
+ HH(b, c, d, a, x[14], 15);
+ HH(a, b, c, d, x[1], 3);
+ HH(d, a, b, c, x[9], 9);
+ HH(c, d, a, b, x[5], 11);
+ HH(b, c, d, a, x[13], 15);
+ HH(a, b, c, d, x[3], 3);
+ HH(d, a, b, c, x[11], 9);
+ HH(c, d, a, b, x[7], 11);
+ HH(b, c, d, a, x[15], 15);
+
+ //Update the hash value
+ context->h[0] += a;
+ context->h[1] += b;
+ context->h[2] += c;
+ context->h[3] += d;
+}
+
+#endif
+