MD5和SHA1算法C++实现及运行时间分析
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时间：2015年06月08日
1.MD5代码实现
HMAC.H即MD5头文件。
#ifndef HMAC_H
#define HMAC_H
// 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;
typedef struct
{
UINT4 state[4]; // state (ABCD)
UINT4 count[2]; // number of bits, modulo 2^64 (lsb first)
unsigned char buffer[64]; // input buffer
} MD5_CTX;
#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21
static unsigned char PADDING[64] = {
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
// F, G, H and I are basic MD5 functions.
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
// ROTATE_LEFT rotates x left n bits.
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
//
// FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
// Rotation is separate from addition to prevent recomputation.
//
#define FF(a, b, c, d, x, s, ac) { (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); }
#define GG(a, b, c, d, x, s, ac) { (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); }
#define HH(a, b, c, d, x, s, ac) { (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); }
#define II(a, b, c, d, x, s, ac) { (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); }
extern void MD5Init(MD5_CTX *);
extern void MD5Update(MD5_CTX *, unsigned char *, unsigned int);
extern void MD5Final(unsigned char [16], MD5_CTX *);
extern void hmac_md5(
unsigned char* text,
int text_len,
unsigned char* key,
int key_len,
unsigned char* digest
);
#endif
HMAC.CPP，即MD5源码
#include "HMAC.H"
#include <string.h>
/*
Following work is derived from "derived from the RSA Data
Security, Inc. MD5 Message-Digest Algorithm"
*/
static void MD5Transform(UINT4 [4], unsigned char [64]);
static void Encode(unsigned char *, UINT4 *, unsigned int);
static void Decode(UINT4 *, unsigned char *, unsigned int);
static void MD5_memcpy (POINTER, POINTER, unsigned int);
static void MD5_memset (POINTER, int, unsigned int);
/*
MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init(
MD5_CTX *context
)
{
context->count[0] = context->count[1] = 0;
//
// Load magic initialization constants.
//
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
/*
MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update(
MD5_CTX *context, // context
unsigned char *input, // input block
unsigned int inputLen // length of input block
)
{
unsigned int i, index, partLen;
//
// Compute number of bytes mod 64
//
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
//
// Update number of bits
//
if ((context->count[0] += ((UINT4)inputLen << 3)) < ((UINT4)inputLen << 3))
{
context->count[1]++;
}
context->count[1] += ((UINT4)inputLen >> 29);
partLen = 64 - index;
//
// Transform as many times as possible.
//
if (inputLen >= partLen)
{
MD5_memcpy((POINTER)&context->buffer[index], (POINTER)input, partLen);
MD5Transform (context->state, context->buffer);
for (i = partLen; i + 63 < inputLen; i += 64)
{
MD5Transform (context->state, &input[i]);
}
index = 0;
}
else
{
i = 0;
}
//
// Buffer remaining input
//
MD5_memcpy((POINTER)&context->buffer[index], (POINTER)&input[i], inputLen-i);
}
/*
MD5 finalization. Ends an MD5 message-digest operation, writing the
the message digest and zeroizing the context.
*/
void MD5Final (
unsigned char digest[16], // message digest
MD5_CTX *context // context
)
{
unsigned char bits[8];
unsigned int index, padLen;
//
// Save number of bits
//
Encode (bits, context->count, 8);
//
// Pad out to 56 mod 64.
//
index = (unsigned int)((context->count[0] >> 3) & 0x3f);
padLen = (index < 56) ? (56 - index) : (120 - index);
MD5Update (context, PADDING, padLen);
//
// Append length (before padding)
//
MD5Update (context, bits, 8);
//
// Store state in digest
//
Encode (digest, context->state, 16);
//
// Zeroize sensitive information.
//
MD5_memset ((POINTER)context, 0, sizeof (*context));
}
/*
MD5 basic transformation. Transforms state based on block.
*/
static void MD5Transform(
UINT4 state[4],
unsigned char block[64]
)
{
UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
Decode (x, block, 64);
// Round 1
FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
/* Round 2 */
GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
GG (d, a, b, c, x[10], S22, 0x2441453); /* 22 */
GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
/* Round 3 */
HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
HH (b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */
HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
/* Round 4 */
II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
// Zeroize sensitive information.
MD5_memset ((POINTER)x, 0, sizeof (x));
}
/*
Encodes input (UINT4) into output (unsigned char). Assumes len is
a multiple of 4.
*/
static void Encode(
unsigned char *output,
UINT4 *input,
unsigned int len
)
{
unsigned int i, j;
for (i = 0, j = 0; j < len; i++, j += 4)
{
output[j] = (unsigned char)(input[i] & 0xff);
output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
}
}
/*
Decodes input (unsigned char) into output (UINT4). Assumes len is
a multiple of 4.
*/
static void Decode (
UINT4 *output,
unsigned char *input,
unsigned int len
)
{
unsigned int i, j;
for (i = 0, j = 0; j < len; i++, j += 4)
{
output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) |
(((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);
}
}
static void MD5_memcpy (
POINTER output,
POINTER input,
unsigned int len
)
{
unsigned int i;
for (i = 0; i < len; i++)
{
output[i] = input[i];
}
}
static void MD5_memset (
POINTER output,
int value,
unsigned int len
)
{
unsigned int i;
for (i = 0; i < len; i++)
{
((char *)output)[i] = (char)value;
}
}
/*
Digests a string and prints the result.
*/
static void MDString (
char *string
)
{
MD5_CTX context;
unsigned char digest[16];
unsigned int len = strlen (string);
MD5Init (&context);
MD5Update (&context, (unsigned char*)string, len);
MD5Final (digest, &context);
}
/*
Function: hmac_md5
*/
void hmac_md5(
unsigned char* text, // pointer to data stream
int text_len, // length of data stream
unsigned char* key, // pointer to authentication key
int key_len, // length of authentication key
unsigned char* digest // caller digest to be filled in
)
{
MD5_CTX context;
unsigned char k_ipad[65]; // inner padding - key XORd with ipad
unsigned char k_opad[65]; // outer padding - key XORd with opad
unsigned char tk[16];
int i;
//
// if key is longer than 64 bytes reset it to key=MD5(key)
//
if (key_len > 64)
{
MD5_CTX tctx;
MD5Init(&tctx);
MD5Update(&tctx, key, key_len);
MD5Final(tk, &tctx);
key = tk;
key_len = 16;
}
/*
the HMAC_MD5 transform looks like:
MD5(K XOR opad, MD5(K XOR ipad, text))
where K is an n byte key
ipad is the byte 0x36 repeated 64 times
opad is the byte 0x5c repeated 64 times
and text is the data being protected
*/
//
// start out by storing key in pads
//
for(i=0;i<65;i++)
{
k_ipad[i]=k_opad[i]=0;
}
for(i=0;i<key_len;i++)
{
k_ipad[i]=k_opad[i]=key[i];
}
//
// XOR key with ipad and opad values
//
for (i=0; i<64; i++)
{
k_ipad[i] ^= 0x36;
k_opad[i] ^= 0x5c;
}
//
// perform inner MD5
//
MD5Init(&context);
MD5Update(&context, k_ipad, 64);
MD5Update(&context, text, text_len);
MD5Final(digest, &context);
//
// perform outer MD5
//
MD5Init(&context);
MD5Update(&context, k_opad, 64);
MD5Update(&context, digest, 16);
MD5Final(digest, &context);
}
2. SHA1算法代码
sha1.h
#ifndef _IPSEC_SHA1_H_
#define _IPSEC_SHA1_H_
typedef unsigned long __u32;
typedef unsigned char __u8;
typedef struct
{
__u32 state[5];
__u32 count[2];
__u8 buffer[64];
} SHA1_CTX;
#if defined(rol)
#undef rol
#endif
#define SHA1HANDSOFF
#define __LITTLE_ENDIAN
#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
/* blk0() and blk() perform the initial expand. */
/* I got the idea of expanding during the round function from SSLeay */
#ifdef __LITTLE_ENDIAN
#define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) |(rol(block->l[i],8)&0x00FF00FF))
#else
#define blk0(i) block->l[i]
#endif
#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] ^block->l[(i+2)&15]^block->l[i&15],1))
/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
/* Hash a single 512-bit block. This is the core of the algorithm. */
void SHA1Transform(__u32 state[5], __u8 buffer[64]);
void SHA1Init(SHA1_CTX *context);
void SHA1Update(SHA1_CTX *context, unsigned char *data, __u32 len);
void SHA1Final(unsigned char digest[20], SHA1_CTX *context);
//void hmac_sha1(unsigned char *to_mac,unsigned int to_mac_length, unsigned char *key,unsigned int key_length, unsigned char *out_mac);
/* Function to compute the digest */
void hmac_sha1
(
unsigned char* d, /* data */
int ld, //data len
unsigned char* k, /* secret key */
int lk, //key len
unsigned char* out /* output buffer, at least "t" bytes */
);
#endif /* _IPSEC_SHA1_H_ */sha1.cpp
#include "sha1.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <memory.h>
#ifndef SHA_DIGESTSIZE
#define SHA_DIGESTSIZE 20
#endif
#ifndef SHA_BLOCKSIZE
#define SHA_BLOCKSIZE 64
#endif
/* Hash a single 512-bit block. This is the core of the algorithm. */
void SHA1Transform(__u32 state[5], __u8 buffer[64])
{
__u32 a, b, c, d, e;
typedef union {
unsigned char c[64];
__u32 l[16];
} CHAR64LONG16;
CHAR64LONG16* block;
#ifdef SHA1HANDSOFF
static unsigned char workspace[64];
block = (CHAR64LONG16*)workspace;
// NdisMoveMemory(block, buffer, 64);
memcpy(block, buffer, 64);
#else
block = (CHAR64LONG16*)buffer;
#endif
/* Copy context->state[] to working vars */
a = state[0];
b = state[1];
c = state[2];
d = state[3];
e = state[4];
/* 4 rounds of 20 operations each. Loop unrolled. */
R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
/* Add the working vars back into context.state[] */
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
state[4] += e;
/* Wipe variables */
a = b = c = d = e = 0;
}
/* SHA1Init - Initialize new context */
void SHA1Init(SHA1_CTX* context)
{
/* SHA1 initialization constants */
context->state[0] = 0x67452301;
context->state[1] = 0xEFCDAB89;
context->state[2] = 0x98BADCFE;
context->state[3] = 0x10325476;
context->state[4] = 0xC3D2E1F0;
context->count[0] = context->count[1] = 0;
}
/* Run your data through this. */
void SHA1Update(SHA1_CTX* context, unsigned char* data, __u32 len)
{
__u32 i, j;
j = context->count[0];
if ((context->count[0] += len << 3) < j)
context->count[1]++;
context->count[1] += (len>>29);
j = (j >> 3) & 63;
if ((j + len) > 63) {
// NdisMoveMemory(&context->buffer[j], data, (i = 64-j));
memcpy(&context->buffer[j], data, (i = 64-j));
SHA1Transform(context->state, context->buffer);
for ( ; i + 63 < len; i += 64) {
SHA1Transform(context->state, &data[i]);
}
j = 0;
}
else i = 0;
// NdisMoveMemory(&context->buffer[j], &data[i], len - i);
memcpy(&context->buffer[j], &data[i], len - i);
}
/* Add padding and return the message digest. */
void SHA1Final(unsigned char digest[20], SHA1_CTX* context)
{
__u32 i, j;
unsigned char finalcount[8];
for (i = 0; i < 8; i++) {
finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)]
>> ((3-(i & 3)) * 8) ) & 255); /* Endian independent */
}
SHA1Update(context, (unsigned char *)"\200", 1);
while ((context->count[0] & 504) != 448) {
SHA1Update(context, (unsigned char *)"\0", 1);
}
SHA1Update(context, finalcount, 8); /* Should cause a SHA1Transform() */
for (i = 0; i < 20; i++) {
digest[i] = (unsigned char)
((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
}
/* Wipe variables */
i = j = 0;
// NdisZeroMemory(context->buffer, 64);
// NdisZeroMemory(context->state, 20);
// NdisZeroMemory(context->count, 8);
// NdisZeroMemory(&finalcount, 8);
memset(context->buffer, 0x00, 64);
memset(context->state, 0x00, 20);
memset(context->count, 0x00, 8);
memset(&finalcount, 0x00, 8);
#ifdef SHA1HANDSOFF /* make SHA1Transform overwrite its own static vars */
SHA1Transform(context->state, context->buffer);
#endif
}
/* Function to print the digest */
void pr_sha(FILE* fp, unsigned char* s, int t)
{
int i ;
for(i=0;i<t;i++)
printf("%02x",s[i]);
printf("\n");
/*
fprintf(fp, "0x") ;
for (i = 0 ; i < t ; i++)
{
fprintf(fp, "%02x", s[i]) ;
printf("\n");
}
fprintf(fp, "0") ;
*/
}
void truncate
(
char* d1, /* data to be truncated */
char* d2, /* truncated data */
int len /* length in bytes to keep */
)
{
int i ;
for (i = 0 ; i < len ; i++) d2[i] = d1[i];
}
/* Function to compute the digest */
/* Function to compute the digest */
void hmac_sha1
(
unsigned char* d, /* data */
int ld, //data len
unsigned char* k, /* secret key */
int lk, //key len
unsigned char* out /* output buffer, at least "t" bytes */
)
{
int t=SHA_DIGESTSIZE;
SHA1_CTX ictx, octx ;
char isha[SHA_DIGESTSIZE], osha[SHA_DIGESTSIZE] ;
unsigned char key[SHA_DIGESTSIZE] ;
char buf[SHA_BLOCKSIZE] ;
int i ;
if (lk > SHA_BLOCKSIZE) {
SHA1_CTX tctx ;
SHA1Init(&tctx) ;
SHA1Update(&tctx, k, lk) ;
SHA1Final(key, &tctx) ;
k = key ;
lk = SHA_DIGESTSIZE ;
}
/**** Inner Digest ****/
SHA1Init(&ictx) ;
/* Pad the key for inner digest */
for (i = 0 ; i < lk ; ++i) buf[i] = k[i] ^ 0x36 ;
for (i = lk ; i < SHA_BLOCKSIZE ; ++i) buf[i] = 0x36 ;
SHA1Update(&ictx, (unsigned char*)buf, SHA_BLOCKSIZE) ;
SHA1Update(&ictx, d, ld) ;
SHA1Final((unsigned char*)isha, &ictx) ;
/**** Outter Digest ****/
SHA1Init(&octx) ;
/* Pad the key for outter digest */
for (i = 0 ; i < lk ; ++i) buf[i] = k[i] ^ 0x5C ;
for (i = lk ; i < SHA_BLOCKSIZE ; ++i) buf[i] = 0x5C ;
SHA1Update(&octx, (unsigned char*)buf, SHA_BLOCKSIZE) ;
SHA1Update(&octx, (unsigned char*)isha, SHA_DIGESTSIZE) ;
SHA1Final((unsigned char*)out, &octx) ;
/* truncate and print the results */
t = t > SHA_DIGESTSIZE ? SHA_DIGESTSIZE : t ;
// truncate(osha, (char*)out, t) ;
// pr_sha(stdout, out, t) ;
}
3.测试代码及时间分析
#include "stdio.h"
#include "stdlib.h"
#include "time.h"
#include "sha1.h"
#include "HMAC.H"
#include "string.h"
/* Function to print the digest */
void pr_hex(FILE* fp, unsigned char* s, int t)
{
int i ;
for(i=0;i<t;i++)
fprintf(fp, "%02x",s[i]);
fprintf(fp,"\n");
}
int main( )
{
clock_t start, finish;
double Total_time;
unsigned char key[20] = "gfedcba987654321";//16bytes
unsigned char data[20] = "123456789abcdefg";//16bytes
unsigned char digest[20];
FILE* time_file;
if ((time_file = fopen("time.txt","w")) == NULL)
{
printf("open time.txt fail\n");
}
int data_len, key_len;
fprintf(time_file, "MD5:\n");
for (data_len = 4; data_len <= 16; data_len += 4)
{
for (key_len = 4; key_len <= 16; key_len += 4)
{
/* 测量一个事件持续的时间*/
fprintf(time_file, "Time to loop 1000 times is(data_len=%2d, key_len=%2d): ",data_len, key_len);
start = clock();
for (int j = 0; j < 1000; j++)
{
hmac_md5(data,data_len,key,key_len,digest);
}
finish = clock();
Total_time = (double)(finish-start) / CLOCKS_PER_SEC;
fprintf(time_file, "%f seconds\n", Total_time);
pr_hex(time_file, digest, 16);
}
}
fprintf(time_file, "\n\n\n\nSHA1:\n");
for (data_len = 4; data_len <= 16; data_len += 4)
{
for (key_len = 4; key_len <= 16; key_len += 4)
{
/* 测量一个事件持续的时间*/
fprintf(time_file, "Time to loop 1000 times is(data_len=%2d, key_len=%2d): ",data_len, key_len);
start = clock();
for (int j = 0; j < 1000; j++)
{
hmac_sha1(data,data_len,key,key_len,digest);
}
finish = clock();
Total_time = (double)(finish-start) / CLOCKS_PER_SEC;
fprintf(time_file, "%f seconds\n", Total_time);
pr_hex(time_file, digest, 20);
}
}
pr_hex(time_file, digest, 20);
return 0;
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