From df63e7e75947b04318f078bc2c51367d02ebb2a2 Mon Sep 17 00:00:00 2001 From: finn Date: Wed, 20 Jul 2022 10:16:07 +0200 Subject: [PATCH] feat: reference implementation addded --- .../lib/md2_impls/reference_impl/global.h | 22 ++ .../md2_impls/reference_impl/md2_reference.h | 36 +++ .../md2_impls/md2_reference/md2_reference.c | 220 ++++++++++++++++++ .../src/md2_impls/md2_reference/mddriver.c | 209 +++++++++++++++++ 4 files changed, 487 insertions(+) create mode 100644 Implementierung/lib/md2_impls/reference_impl/global.h create mode 100644 Implementierung/lib/md2_impls/reference_impl/md2_reference.h create mode 100644 Implementierung/src/md2_impls/md2_reference/md2_reference.c create mode 100644 Implementierung/src/md2_impls/md2_reference/mddriver.c diff --git a/Implementierung/lib/md2_impls/reference_impl/global.h b/Implementierung/lib/md2_impls/reference_impl/global.h new file mode 100644 index 0000000..6209a20 --- /dev/null +++ b/Implementierung/lib/md2_impls/reference_impl/global.h @@ -0,0 +1,22 @@ +#ifndef PROTOTYPES +#define PROTOTYPES 0 +#endif + +/* POINTER defines a generic pointer type */ +typedef unsigned char *POINTER; + +/* UINT2 defines a two byte word */ +typedef unsigned short int UINT2; + +/* UINT4 defines a four byte word */ +typedef unsigned long int UINT4; + +/* PROTO_LIST is defined depending on how PROTOTYPES is defined above. + If using PROTOTYPES, then PROTO_LIST returns the list, otherwise it + returns an empty list. + */ +#if PROTOTYPES +#define PROTO_LIST(list) list +#else +#define PROTO_LIST(list) () +#endif \ No newline at end of file diff --git a/Implementierung/lib/md2_impls/reference_impl/md2_reference.h b/Implementierung/lib/md2_impls/reference_impl/md2_reference.h new file mode 100644 index 0000000..47f47c5 --- /dev/null +++ b/Implementierung/lib/md2_impls/reference_impl/md2_reference.h @@ -0,0 +1,36 @@ +typedef struct { + unsigned char state[16]; /* state */ + unsigned char checksum[16]; /* checksum */ + unsigned int count; /* number of bytes, modulo 16 */ + unsigned char buffer[16]; /* input buffer */ +} MD2_CTX; + +void MD2Init PROTO_LIST ((MD2_CTX *)); +void MD2Update PROTO_LIST + ((MD2_CTX *, unsigned char *, unsigned int)); +void MD2Final PROTO_LIST ((unsigned char [16], MD2_CTX *)); + + +#ifndef MD2_REF_H +#define MD2_REF_H + +#include +#include +#include +#include +#include +#include + +#include "../io.h" + +/** + * @brief This implementation is the reference implementation + * + * @param _ unused + * @param filename name of the file to load + * @param out + */ +void md2_hash_ref(size_t len, const uint8_t buf[len], uint8_t out[16]); +void md2_checksum_ref(size_t len, uint8_t* buf); + +#endif // MD2_REF_H \ No newline at end of file diff --git a/Implementierung/src/md2_impls/md2_reference/md2_reference.c b/Implementierung/src/md2_impls/md2_reference/md2_reference.c new file mode 100644 index 0000000..a2544b0 --- /dev/null +++ b/Implementierung/src/md2_impls/md2_reference/md2_reference.c @@ -0,0 +1,220 @@ +/* MD2C.C - RSA Data Security, Inc., MD2 message-digest algorithm + */ + +/* Copyright (C) 1990-2, RSA Data Security, Inc. Created 1990. All + rights reserved. + + License to copy and use this software is granted for + non-commercial Internet Privacy-Enhanced Mail provided that it is + identified as the "RSA Data Security, Inc. MD2 Message Digest + Algorithm" in all material mentioning or referencing this software + or this function. + + RSA Data Security, Inc. makes no representations concerning either + the merchantability of this software or the suitability of this + software for any particular purpose. It is provided "as is" + without express or implied warranty of any kind. + + These notices must be retained in any copies of any part of this + documentation and/or software. + */ + +#include "global.h" +#include "md2_reference.h" + +static void MD2Transform PROTO_LIST + ((unsigned char [16], unsigned char [16], unsigned char [16])); +static void MD2_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int)); +static void MD2_memset PROTO_LIST ((POINTER, int, unsigned int)); + +/* Permutation of 0..255 constructed from the digits of pi. It gives a + "random" nonlinear byte substitution operation. + */ +static unsigned char PI_SUBST[256] = { + 41, 46, 67, 201, 162, 216, 124, 1, 61, 54, 84, 161, 236, 240, 6, + 19, 98, 167, 5, 243, 192, 199, 115, 140, 152, 147, 43, 217, 188, + 76, 130, 202, 30, 155, 87, 60, 253, 212, 224, 22, 103, 66, 111, 24, + 138, 23, 229, 18, 190, 78, 196, 214, 218, 158, 222, 73, 160, 251, + 245, 142, 187, 47, 238, 122, 169, 104, 121, 145, 21, 178, 7, 63, + 148, 194, 16, 137, 11, 34, 95, 33, 128, 127, 93, 154, 90, 144, 50, + 39, 53, 62, 204, 231, 191, 247, 151, 3, 255, 25, 48, 179, 72, 165, + 181, 209, 215, 94, 146, 42, 172, 86, 170, 198, 79, 184, 56, 210, + 150, 164, 125, 182, 118, 252, 107, 226, 156, 116, 4, 241, 69, 157, + 112, 89, 100, 113, 135, 32, 134, 91, 207, 101, 230, 45, 168, 2, 27, + 96, 37, 173, 174, 176, 185, 246, 28, 70, 97, 105, 52, 64, 126, 15, + 85, 71, 163, 35, 221, 81, 175, 58, 195, 92, 249, 206, 186, 197, + 234, 38, 44, 83, 13, 110, 133, 40, 132, 9, 211, 223, 205, 244, 65, + 129, 77, 82, 106, 220, 55, 200, 108, 193, 171, 250, 36, 225, 123, + 8, 12, 189, 177, 74, 120, 136, 149, 139, 227, 99, 232, 109, 233, + 203, 213, 254, 59, 0, 29, 57, 242, 239, 183, 14, 102, 88, 208, 228, + 166, 119, 114, 248, 235, 117, 75, 10, 49, 68, 80, 180, 143, 237, + 31, 26, 219, 153, 141, 51, 159, 17, 131, 20 +}; + +static unsigned char *PADDING[] = { + (unsigned char *)"", + (unsigned char *)"\001", + (unsigned char *)"\002\002", + (unsigned char *)"\003\003\003", + (unsigned char *)"\004\004\004\004", + (unsigned char *)"\005\005\005\005\005", + (unsigned char *)"\006\006\006\006\006\006", + (unsigned char *)"\007\007\007\007\007\007\007", + (unsigned char *)"\010\010\010\010\010\010\010\010", + (unsigned char *)"\011\011\011\011\011\011\011\011\011", + (unsigned char *)"\012\012\012\012\012\012\012\012\012\012", + (unsigned char *)"\013\013\013\013\013\013\013\013\013\013\013", + (unsigned char *)"\014\014\014\014\014\014\014\014\014\014\014\014", + (unsigned char *) + "\015\015\015\015\015\015\015\015\015\015\015\015\015", + (unsigned char *) + "\016\016\016\016\016\016\016\016\016\016\016\016\016\016", + (unsigned char *) + "\017\017\017\017\017\017\017\017\017\017\017\017\017\017\017", + (unsigned char *) + "\020\020\020\020\020\020\020\020\020\020\020\020\020\020\020\020" +}; + +/* MD2 initialization. Begins an MD2 operation, writing a new context. + */ +void MD2Init (context) +MD2_CTX *context; /* context */ +{ + context->count = 0; + MD2_memset ((POINTER)context->state, 0, sizeof (context->state)); + MD2_memset + ((POINTER)context->checksum, 0, sizeof (context->checksum)); +} + +/* MD2 block update operation. Continues an MD2 message-digest + operation, processing another message block, and updating the + context. + */ +void MD2Update (context, input, inputLen) +MD2_CTX *context; /* context */ +unsigned char *input; /* input block */ +unsigned int inputLen; /* length of input block */ +{ + unsigned int i, index, partLen; + + /* Update number of bytes mod 16 */ + index = context->count; + context->count = (index + inputLen) & 0xf; + + partLen = 16 - index; + + /* Transform as many times as possible. + */ + if (inputLen >= partLen) { + MD2_memcpy + ((POINTER)&context->buffer[index], (POINTER)input, partLen); + MD2Transform (context->state, context->checksum, context->buffer); + + for (i = partLen; i + 15 < inputLen; i += 16) + MD2Transform (context->state, context->checksum, &input[i]); + + index = 0; + } + else + i = 0; + + /* Buffer remaining input */ + MD2_memcpy + ((POINTER)&context->buffer[index], (POINTER)&input[i], + inputLen-i); +} + +/* MD2 finalization. Ends an MD2 message-digest operation, writing the + message digest and zeroizing the context. + */ +void MD2Final (digest, context) + +unsigned char digest[16]; /* message digest */ +MD2_CTX *context; /* context */ +{ + unsigned int index, padLen; + + /* Pad out to multiple of 16. + */ + index = context->count; + padLen = 16 - index; + MD2Update (context, PADDING[padLen], padLen); + + /* Extend with checksum */ + MD2Update (context, context->checksum, 16); + + /* Store state in digest */ + MD2_memcpy ((POINTER)digest, (POINTER)context->state, 16); + + /* Zeroize sensitive information. + */ + MD2_memset ((POINTER)context, 0, sizeof (*context)); +} + +/* MD2 basic transformation. Transforms state and updates checksum + based on block. + */ +static void MD2Transform (state, checksum, block) +unsigned char state[16]; +unsigned char checksum[16]; +unsigned char block[16]; +{ + unsigned int i, j, t; + unsigned char x[48]; + + /* Form encryption block from state, block, state ^ block. + */ + MD2_memcpy ((POINTER)x, (POINTER)state, 16); + MD2_memcpy ((POINTER)x+16, (POINTER)block, 16); + for (i = 0; i < 16; i++) + x[i+32] = state[i] ^ block[i]; + + /* Encrypt block (18 rounds). + */ + t = 0; + for (i = 0; i < 18; i++) { + for (j = 0; j < 48; j++) + t = x[j] ^= PI_SUBST[t]; + t = (t + i) & 0xff; + } + + +/* Save new state */ + MD2_memcpy ((POINTER)state, (POINTER)x, 16); + + /* Update checksum. + */ + t = checksum[15]; + for (i = 0; i < 16; i++) + t = checksum[i] ^= PI_SUBST[block[i] ^ t]; + + /* Zeroize sensitive information. + */ + MD2_memset ((POINTER)x, 0, sizeof (x)); +} + +/* Note: Replace "for loop" with standard memcpy if possible. + */ +static void MD2_memcpy (output, input, len) +POINTER output; +POINTER input; +unsigned int len; +{ + unsigned int i; + + for (i = 0; i < len; i++) + output[i] = input[i]; +} + +/* Note: Replace "for loop" with standard memset if possible. + */ +static void MD2_memset (output, value, len) +POINTER output; +int value; +unsigned int len; +{ + unsigned int i; + + for (i = 0; i < len; i++) + ((char *)output)[i] = (char)value; +} diff --git a/Implementierung/src/md2_impls/md2_reference/mddriver.c b/Implementierung/src/md2_impls/md2_reference/mddriver.c new file mode 100644 index 0000000..53e19cb --- /dev/null +++ b/Implementierung/src/md2_impls/md2_reference/mddriver.c @@ -0,0 +1,209 @@ +/* MDDRIVER.C - test driver for MD2, MD4 and MD5 + */ + +/* Copyright (C) 1990-2, RSA Data Security, Inc. Created 1990. All + rights reserved. + RSA Data Security, Inc. makes no representations concerning either + the merchantability of this software or the suitability of this + software for any particular purpose. It is provided "as is" + without express or implied warranty of any kind. + + These notices must be retained in any copies of any part of this + documentation and/or software. + */ + +/* The following makes MD default to MD5 if it has not already been + defined with C compiler flags. + */ +#ifndef MD +#define MD MD5 +#endif + +#include +#include +#include +#include "global.h" +#if MD == 2 +#include "md2_reference.h" +#endif + +/* Length of test block, number of test blocks. + */ +#define TEST_BLOCK_LEN 1000 +#define TEST_BLOCK_COUNT 1000 + +static void MDString PROTO_LIST ((char *)); +static void MDTimeTrial PROTO_LIST ((void)); +static void MDTestSuite PROTO_LIST ((void)); +static void MDFile PROTO_LIST ((char *)); +static void MDFilter PROTO_LIST ((void)); +static void MDPrint PROTO_LIST ((unsigned char [16])); + +#if MD == 2 +#define MD_CTX MD2_CTX +#define MDInit MD2Init +#define MDUpdate MD2Update +#define MDFinal MD2Final +#endif + + +/* Main driver. + + Arguments (may be any combination): + -sstring - digests string + -t - runs time trial + -x - runs test script + filename - digests file + (none) - digests standard input + */ +int main (argc, argv) +int argc; +char *argv[]; +{ + int i; + + if (argc > 1) + for (i = 1; i < argc; i++) + if (argv[i][0] == '-' && argv[i][1] == 's') + MDString (argv[i] + 2); + else if (strcmp (argv[i], "-t") == 0) + MDTimeTrial (); + else if (strcmp (argv[i], "-x") == 0) + MDTestSuite (); + else + MDFile (argv[i]); + else + MDFilter (); + + return (0); +} + +/* Digests a string and prints the result. + */ +static void MDString (string) +char *string; + +{ + MD_CTX context; + unsigned char digest[16]; + unsigned int len = strlen (string); + + MDInit (&context); + MDUpdate (&context, string, len); + MDFinal (digest, &context); + + printf ("MD%d (\"%s\") = ", MD, string); + MDPrint (digest); + printf ("\n"); +} + +/* Measures the time to digest TEST_BLOCK_COUNT TEST_BLOCK_LEN-byte + blocks. + */ +static void MDTimeTrial () +{ + MD_CTX context; + time_t endTime, startTime; + unsigned char block[TEST_BLOCK_LEN], digest[16]; + unsigned int i; + + printf + ("MD%d time trial. Digesting %d %d-byte blocks ...", MD, + TEST_BLOCK_LEN, TEST_BLOCK_COUNT); + + /* Initialize block */ + for (i = 0; i < TEST_BLOCK_LEN; i++) + block[i] = (unsigned char)(i & 0xff); + + /* Start timer */ + time (&startTime); + + /* Digest blocks */ + MDInit (&context); + for (i = 0; i < TEST_BLOCK_COUNT; i++) + MDUpdate (&context, block, TEST_BLOCK_LEN); + MDFinal (digest, &context); + + /* Stop timer */ + time (&endTime); + + printf (" done\n"); + printf ("Digest = "); + MDPrint (digest); + printf ("\nTime = %ld seconds\n", (long)(endTime-startTime)); + printf + ("Speed = %ld bytes/second\n", + (long)TEST_BLOCK_LEN * (long)TEST_BLOCK_COUNT/(endTime-startTime)); +} +/* Digests a reference suite of strings and prints the results. + */ +static void MDTestSuite () +{ + printf ("MD%d test suite:\n", MD); + + MDString (""); + MDString ("a"); + MDString ("abc"); + MDString ("message digest"); + MDString ("abcdefghijklmnopqrstuvwxyz"); + MDString + ("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"); + MDString + ("1234567890123456789012345678901234567890\ +1234567890123456789012345678901234567890"); +} + +/* Digests a file and prints the result. + */ +static void MDFile (filename) +char *filename; +{ + FILE *file; + MD_CTX context; + int len; + unsigned char buffer[1024], digest[16]; + + if ((file = fopen (filename, "rb")) == NULL) + printf ("%s can't be opened\n", filename); + + else { + MDInit (&context); + while (len = fread (buffer, 1, 1024, file)) + MDUpdate (&context, buffer, len); + MDFinal (digest, &context); + + fclose (file); + + printf ("MD%d (%s) = ", MD, filename); + MDPrint (digest); + printf ("\n"); + } +} + +/* Digests the standard input and prints the result. + */ +static void MDFilter () +{ + MD_CTX context; + int len; + unsigned char buffer[16], digest[16]; + + MDInit (&context); + while (len = fread (buffer, 1, 16, stdin)) + MDUpdate (&context, buffer, len); + MDFinal (digest, &context); + + MDPrint (digest); + printf ("\n"); +} + +/* Prints a message digest in hexadecimal. + */ +static void MDPrint (digest) +unsigned char digest[16]; +{ + unsigned int i; + + for (i = 0; i < 16; i++) + printf ("%02x", digest[i]); +}