Browse Source

add md5.hpp

master
Niklas Rosenstein 3 years ago
parent
commit
d1fd4a0dc4
No known key found for this signature in database GPG Key ID: 6D269B33D25F6C6
2 changed files with 366 additions and 0 deletions
  1. + 76
    - 0
      include/NiklasRosenstein/md5.hpp
  2. + 290
    - 0
      include/NiklasRosenstein/md5_impl.cpp

+ 76
- 0
include/NiklasRosenstein/md5.hpp

@ -0,0 +1,76 @@
/* This file was modified for the NiklasRosenstein C++ library and namespace. */
/*
* This is an OpenSSL-compatible implementation of the RSA Data Security, Inc.
* MD5 Message-Digest Algorithm (RFC 1321).
*
* Homepage:
* http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5
*
* Author:
* Alexander Peslyak, better known as Solar Designer <solar at openwall.com>
*
* This software was written by Alexander Peslyak in 2001. No copyright is
* claimed, and the software is hereby placed in the public domain.
* In case this attempt to disclaim copyright and place the software in the
* public domain is deemed null and void, then the software is
* Copyright (c) 2001 Alexander Peslyak and it is hereby released to the
* general public under the following terms:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted.
*
* There's ABSOLUTELY NO WARRANTY, express or implied.
*
* See md5.c for more information.
*/
#pragma once
#include <cstdint>
#include <cstring>
#include <string>
#include "string.hpp"
namespace niklasrosenstein {
typedef uint32_t md5_uint32;
struct md5 {
public: /* Data members */
md5_uint32 lo, hi;
md5_uint32 a, b, c, d;
unsigned char buffer[64];
md5_uint32 block[16];
public: /* Methods */
md5();
md5(char const* str) : md5() { update(str); }
md5(void const* data, size_t size) : md5() { update(data, size); }
void update(char const* str) { update(str, strlen(str)); }
void update(void const* data, size_t size);
void digest(char* buffer);
std::string digest() { std::string r(16, 0); digest(&r[0]); return r; }
void hexdigest(char* buffer) { char dbuf[16]; digest(dbuf); tohex(buffer, dbuf, 16); }
std::string hexdigest() { std::string r(32, 0); hexdigest(&r[0]); return r; }
private:
void const* body(void const* data, size_t size);
};
} // namespace niklasrosenstein
#include "md5_impl.cpp"
// Undo all the defines from the implementation file.
#undef F
#undef G
#undef H
#undef H2
#undef I
#undef STEP
#undef SET
#undef GET
#undef OUT

+ 290
- 0
include/NiklasRosenstein/md5_impl.cpp

@ -0,0 +1,290 @@
/* This file was modified for the NiklasRosenstein C++ library and namespace. */
/*
* This is an OpenSSL-compatible implementation of the RSA Data Security, Inc.
* MD5 Message-Digest Algorithm (RFC 1321).
*
* Homepage:
* http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5
*
* Author:
* Alexander Peslyak, better known as Solar Designer <solar at openwall.com>
*
* This software was written by Alexander Peslyak in 2001. No copyright is
* claimed, and the software is hereby placed in the public domain.
* In case this attempt to disclaim copyright and place the software in the
* public domain is deemed null and void, then the software is
* Copyright (c) 2001 Alexander Peslyak and it is hereby released to the
* general public under the following terms:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted.
*
* There's ABSOLUTELY NO WARRANTY, express or implied.
*
* (This is a heavily cut-down "BSD license".)
*
* This differs from Colin Plumb's older public domain implementation in that
* no exactly 32-bit integer data type is required (any 32-bit or wider
* unsigned integer data type will do), there's no compile-time endianness
* configuration, and the function prototypes match OpenSSL's. No code from
* Colin Plumb's implementation has been reused; this comment merely compares
* the properties of the two independent implementations.
*
* The primary goals of this implementation are portability and ease of use.
* It is meant to be fast, but not as fast as possible. Some known
* optimizations are not included to reduce source code size and avoid
* compile-time configuration.
*/
#include <string.h>
#include "md5.hpp"
using nr::md5;
/*
* The basic MD5 functions.
*
* F and G are optimized compared to their RFC 1321 definitions for
* architectures that lack an AND-NOT instruction, just like in Colin Plumb's
* implementation.
*/
#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
#define G(x, y, z) ((y) ^ ((z) & ((x) ^ (y))))
#define H(x, y, z) (((x) ^ (y)) ^ (z))
#define H2(x, y, z) ((x) ^ ((y) ^ (z)))
#define I(x, y, z) ((y) ^ ((x) | ~(z)))
/*
* The MD5 transformation for all four rounds.
*/
#define STEP(f, a, b, c, d, x, t, s) \
(a) += f((b), (c), (d)) + (x) + (t); \
(a) = (((a) << (s)) | (((a) & 0xffffffff) >> (32 - (s)))); \
(a) += (b);
/*
* SET reads 4 input bytes in little-endian byte order and stores them in a
* properly aligned word in host byte order.
*
* The check for little-endian architectures that tolerate unaligned memory
* accesses is just an optimization. Nothing will break if it fails to detect
* a suitable architecture.
*
* Unfortunately, this optimization may be a C strict aliasing rules violation
* if the caller's data buffer has effective type that cannot be aliased by
* md5_uint32. In practice, this problem may occur if these MD5 routines are
* inlined into a calling function, or with future and dangerously advanced
* link-time optimizations. For the time being, keeping these MD5 routines in
* their own translation unit avoids the problem.
*/
#if defined(__i386__) || defined(__x86_64__) || defined(__vax__)
#define SET(n) \
(*(md5_uint32 *)&ptr[(n) * 4])
#define GET(n) \
SET(n)
#else
#define SET(n) \
(this->block[(n)] = \
(md5_uint32)ptr[(n) * 4] | \
((md5_uint32)ptr[(n) * 4 + 1] << 8) | \
((md5_uint32)ptr[(n) * 4 + 2] << 16) | \
((md5_uint32)ptr[(n) * 4 + 3] << 24))
#define GET(n) \
(this->block[(n)])
#endif
/*
* This processes one or more 64-byte data blocks, but does NOT update the bit
* counters. There are no alignment requirements.
*/
void const* md5::body(const void *data, size_t size)
{
unsigned char const* ptr;
md5_uint32 a, b, c, d;
md5_uint32 saved_a, saved_b, saved_c, saved_d;
ptr = reinterpret_cast<unsigned char const*>(data);
a = this->a;
b = this->b;
c = this->c;
d = this->d;
do {
saved_a = a;
saved_b = b;
saved_c = c;
saved_d = d;
/* Round 1 */
STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7)
STEP(F, d, a, b, c, SET(1), 0xe8c7b756, 12)
STEP(F, c, d, a, b, SET(2), 0x242070db, 17)
STEP(F, b, c, d, a, SET(3), 0xc1bdceee, 22)
STEP(F, a, b, c, d, SET(4), 0xf57c0faf, 7)
STEP(F, d, a, b, c, SET(5), 0x4787c62a, 12)
STEP(F, c, d, a, b, SET(6), 0xa8304613, 17)
STEP(F, b, c, d, a, SET(7), 0xfd469501, 22)
STEP(F, a, b, c, d, SET(8), 0x698098d8, 7)
STEP(F, d, a, b, c, SET(9), 0x8b44f7af, 12)
STEP(F, c, d, a, b, SET(10), 0xffff5bb1, 17)
STEP(F, b, c, d, a, SET(11), 0x895cd7be, 22)
STEP(F, a, b, c, d, SET(12), 0x6b901122, 7)
STEP(F, d, a, b, c, SET(13), 0xfd987193, 12)
STEP(F, c, d, a, b, SET(14), 0xa679438e, 17)
STEP(F, b, c, d, a, SET(15), 0x49b40821, 22)
/* Round 2 */
STEP(G, a, b, c, d, GET(1), 0xf61e2562, 5)
STEP(G, d, a, b, c, GET(6), 0xc040b340, 9)
STEP(G, c, d, a, b, GET(11), 0x265e5a51, 14)
STEP(G, b, c, d, a, GET(0), 0xe9b6c7aa, 20)
STEP(G, a, b, c, d, GET(5), 0xd62f105d, 5)
STEP(G, d, a, b, c, GET(10), 0x02441453, 9)
STEP(G, c, d, a, b, GET(15), 0xd8a1e681, 14)
STEP(G, b, c, d, a, GET(4), 0xe7d3fbc8, 20)
STEP(G, a, b, c, d, GET(9), 0x21e1cde6, 5)
STEP(G, d, a, b, c, GET(14), 0xc33707d6, 9)
STEP(G, c, d, a, b, GET(3), 0xf4d50d87, 14)
STEP(G, b, c, d, a, GET(8), 0x455a14ed, 20)
STEP(G, a, b, c, d, GET(13), 0xa9e3e905, 5)
STEP(G, d, a, b, c, GET(2), 0xfcefa3f8, 9)
STEP(G, c, d, a, b, GET(7), 0x676f02d9, 14)
STEP(G, b, c, d, a, GET(12), 0x8d2a4c8a, 20)
/* Round 3 */
STEP(H, a, b, c, d, GET(5), 0xfffa3942, 4)
STEP(H2, d, a, b, c, GET(8), 0x8771f681, 11)
STEP(H, c, d, a, b, GET(11), 0x6d9d6122, 16)
STEP(H2, b, c, d, a, GET(14), 0xfde5380c, 23)
STEP(H, a, b, c, d, GET(1), 0xa4beea44, 4)
STEP(H2, d, a, b, c, GET(4), 0x4bdecfa9, 11)
STEP(H, c, d, a, b, GET(7), 0xf6bb4b60, 16)
STEP(H2, b, c, d, a, GET(10), 0xbebfbc70, 23)
STEP(H, a, b, c, d, GET(13), 0x289b7ec6, 4)
STEP(H2, d, a, b, c, GET(0), 0xeaa127fa, 11)
STEP(H, c, d, a, b, GET(3), 0xd4ef3085, 16)
STEP(H2, b, c, d, a, GET(6), 0x04881d05, 23)
STEP(H, a, b, c, d, GET(9), 0xd9d4d039, 4)
STEP(H2, d, a, b, c, GET(12), 0xe6db99e5, 11)
STEP(H, c, d, a, b, GET(15), 0x1fa27cf8, 16)
STEP(H2, b, c, d, a, GET(2), 0xc4ac5665, 23)
/* Round 4 */
STEP(I, a, b, c, d, GET(0), 0xf4292244, 6)
STEP(I, d, a, b, c, GET(7), 0x432aff97, 10)
STEP(I, c, d, a, b, GET(14), 0xab9423a7, 15)
STEP(I, b, c, d, a, GET(5), 0xfc93a039, 21)
STEP(I, a, b, c, d, GET(12), 0x655b59c3, 6)
STEP(I, d, a, b, c, GET(3), 0x8f0ccc92, 10)
STEP(I, c, d, a, b, GET(10), 0xffeff47d, 15)
STEP(I, b, c, d, a, GET(1), 0x85845dd1, 21)
STEP(I, a, b, c, d, GET(8), 0x6fa87e4f, 6)
STEP(I, d, a, b, c, GET(15), 0xfe2ce6e0, 10)
STEP(I, c, d, a, b, GET(6), 0xa3014314, 15)
STEP(I, b, c, d, a, GET(13), 0x4e0811a1, 21)
STEP(I, a, b, c, d, GET(4), 0xf7537e82, 6)
STEP(I, d, a, b, c, GET(11), 0xbd3af235, 10)
STEP(I, c, d, a, b, GET(2), 0x2ad7d2bb, 15)
STEP(I, b, c, d, a, GET(9), 0xeb86d391, 21)
a += saved_a;
b += saved_b;
c += saved_c;
d += saved_d;
ptr += 64;
} while (size -= 64);
this->a = a;
this->b = b;
this->c = c;
this->d = d;
return ptr;
}
md5::md5()
{
this->a = 0x67452301;
this->b = 0xefcdab89;
this->c = 0x98badcfe;
this->d = 0x10325476;
this->lo = 0;
this->hi = 0;
}
void md5::update(const void *data, size_t size)
{
md5_uint32 saved_lo;
unsigned long used, available;
saved_lo = this->lo;
if ((this->lo = (saved_lo + size) & 0x1fffffff) < saved_lo)
this->hi++;
this->hi += size >> 29;
used = saved_lo & 0x3f;
if (used) {
available = 64 - used;
if (size < available) {
memcpy(&this->buffer[used], data, size);
return;
}
memcpy(&this->buffer[used], data, available);
data = (const unsigned char *)data + available;
size -= available;
this->body(this->buffer, 64);
}
if (size >= 64) {
data = this->body(data, size & ~(unsigned long)0x3f);
size &= 0x3f;
}
memcpy(this->buffer, data, size);
}
#define OUT(dst, src) \
(dst)[0] = (unsigned char)(src); \
(dst)[1] = (unsigned char)((src) >> 8); \
(dst)[2] = (unsigned char)((src) >> 16); \
(dst)[3] = (unsigned char)((src) >> 24);
void md5::digest(char *result)
{
unsigned long used, available;
used = this->lo & 0x3f;
this->buffer[used++] = 0x80;
available = 64 - used;
if (available < 8) {
memset(&this->buffer[used], 0, available);
this->body(this->buffer, 64);
used = 0;
available = 64;
}
memset(&this->buffer[used], 0, available - 8);
this->lo <<= 3;
OUT(&this->buffer[56], this->lo)
OUT(&this->buffer[60], this->hi)
this->body(this->buffer, 64);
OUT(&result[0], this->a)
OUT(&result[4], this->b)
OUT(&result[8], this->c)
OUT(&result[12], this->d)
memset(this, 0, sizeof(*this));
}

Loading…
Cancel
Save