ran_prim.cpp
资源名称:HookAPI [点击查看]
上传用户:nbcables
上传日期:2007-01-11
资源大小:1243k
文件大小:17k
源码类别:
钩子与API截获
开发平台:
Visual C++
- /* random and prime functions
- */
- #include "stdafx.h"
- #include "rsaref.h"
- #include "big_num.h"
- /*
- *Random function
- */
- #define RANDOM_BYTES_NEEDED 256
- int R_RandomInit (R_RANDOM_STRUCT *randomStruct)
- {
- randomStruct->bytesNeeded = RANDOM_BYTES_NEEDED;
- R_memset ((POINTER)randomStruct->state, 0, sizeof (randomStruct->state));
- randomStruct->outputAvailable = 0;
- return (0);
- }
- int R_RandomUpdate (R_RANDOM_STRUCT *randomStruct, unsigned char *block, unsigned int blockLen)
- {
- LOCAL_MD5_CTX context;
- unsigned char digest[16];
- unsigned int i, x;
- LOCAL_MD5Init (&context);
- LOCAL_MD5Update (&context, block, blockLen);
- LOCAL_MD5Final (digest, &context);
- /* add digest to state */
- x = 0;
- for (i = 0; i < 16; i++) {
- x += randomStruct->state[15-i] + digest[15-i];
- randomStruct->state[15-i] = (unsigned char)x;
- x >>= 8;
- }
- if (randomStruct->bytesNeeded < blockLen)
- randomStruct->bytesNeeded = 0;
- else
- randomStruct->bytesNeeded -= blockLen;
- /* Zeroize sensitive information.
- */
- R_memset ((POINTER)digest, 0, sizeof (digest));
- x = 0;
- return (0);
- }
- void R_RandomFinal (R_RANDOM_STRUCT *randomStruct)
- {
- R_memset ((POINTER)randomStruct, 0, sizeof (*randomStruct));
- }
- int R_GetRandomBytesNeeded (unsigned int *bytesNeeded, R_RANDOM_STRUCT *randomStruct)
- {
- *bytesNeeded = randomStruct->bytesNeeded;
- return (0);
- }
- int R_GenerateBytes (unsigned char *block, unsigned int blockLen, R_RANDOM_STRUCT *randomStruct)
- {
- LOCAL_MD5_CTX context;
- unsigned int available, i;
- if (randomStruct->bytesNeeded)
- return (RE_NEED_RANDOM);
- available = randomStruct->outputAvailable;
- while (blockLen > available) {
- R_memcpy
- ((POINTER)block, (POINTER)&randomStruct->output[16-available],
- available);
- block += available;
- blockLen -= available;
- /* generate new output */
- LOCAL_MD5Init (&context);
- LOCAL_MD5Update (&context, randomStruct->state, 16);
- LOCAL_MD5Final (randomStruct->output, &context);
- available = 16;
- /* increment state */
- for (i = 0; i < 16; i++)
- if (randomStruct->state[15-i]++)
- break;
- }
- R_memcpy
- ((POINTER)block, (POINTER)&randomStruct->output[16-available], blockLen);
- randomStruct->outputAvailable = available - blockLen;
- return (0);
- }
- /*
- * Prime function
- */
- static unsigned int SMALL_PRIMES[] = { 3, 5, 7, 11 };
- #define SMALL_PRIME_COUNT 4
- static int ProbablePrime PROTO_LIST ((NN_DIGIT *, unsigned int));
- static int SmallFactor PROTO_LIST ((NN_DIGIT *, unsigned int));
- static int FermatTest PROTO_LIST ((NN_DIGIT *, unsigned int));
- /* Generates a probable prime a between b and c such that a-1 is
- divisible by d.
- Lengths: a[digits], b[digits], c[digits], d[digits].
- Assumes b < c, digits < MAX_NN_DIGITS.
- Returns RE_NEED_RANDOM if randomStruct not seeded, RE_DATA if
- unsuccessful.
- */
- int GeneratePrime (NN_DIGIT *a, NN_DIGIT *b, NN_DIGIT *c, NN_DIGIT *d, unsigned int digits, R_RANDOM_STRUCT *randomStruct)
- {
- int status;
- unsigned char block[MAX_NN_DIGITS * NN_DIGIT_LEN];
- NN_DIGIT t[MAX_NN_DIGITS], u[MAX_NN_DIGITS];
- /* Generate random number between b and c.
- */
- if (status = R_GenerateBytes (block, digits * NN_DIGIT_LEN, randomStruct))
- return (status);
- NN_Decode (a, digits, block, digits * NN_DIGIT_LEN);
- NN_Sub (t, c, b, digits);
- NN_ASSIGN_DIGIT (u, 1, digits);
- NN_Add (t, t, u, digits);
- NN_Mod (a, a, digits, t, digits);
- NN_Add (a, a, b, digits);
- /* Adjust so that a-1 is divisible by d.
- */
- NN_Mod (t, a, digits, d, digits);
- NN_Sub (a, a, t, digits);
- NN_Add (a, a, u, digits);
- if (NN_Cmp (a, b, digits) < 0)
- NN_Add (a, a, d, digits);
- if (NN_Cmp (a, c, digits) > 0)
- NN_Sub (a, a, d, digits);
- /* Search to c in steps of d.
- */
- NN_Assign (t, c, digits);
- NN_Sub (t, t, d, digits);
- while (! ProbablePrime (a, digits)) {
- if (NN_Cmp (a, t, digits) > 0)
- return (RE_DATA);
- NN_Add (a, a, d, digits);
- }
- return (0);
- }
- /* Returns nonzero iff a is a probable prime.
- Lengths: a[aDigits].
- Assumes aDigits < MAX_NN_DIGITS.
- */
- static int ProbablePrime (NN_DIGIT *a, unsigned int aDigits)
- {
- return (! SmallFactor (a, aDigits) && FermatTest (a, aDigits));
- }
- /* Returns nonzero iff a has a prime factor in SMALL_PRIMES.
- Lengths: a[aDigits].
- Assumes aDigits < MAX_NN_DIGITS.
- */
- static int SmallFactor (NN_DIGIT *a, unsigned int aDigits)
- {
- int status;
- NN_DIGIT t[1];
- unsigned int i;
- status = 0;
- for (i = 0; i < SMALL_PRIME_COUNT; i++) {
- NN_ASSIGN_DIGIT (t, SMALL_PRIMES[i], 1);
- if ((aDigits == 1) && ! NN_Cmp (a, t, 1))
- break;
- NN_Mod (t, a, aDigits, t, 1);
- if (NN_Zero (t, 1)) {
- status = 1;
- break;
- }
- }
- /* Zeroize sensitive information.
- */
- i = 0;
- R_memset ((POINTER)t, 0, sizeof (t));
- return (status);
- }
- /* Returns nonzero iff a passes Fermat's test for witness 2.
- (All primes pass the test, and nearly all composites fail.)
- Lengths: a[aDigits].
- Assumes aDigits < MAX_NN_DIGITS.
- */
- static int FermatTest (NN_DIGIT *a, unsigned int aDigits)
- {
- int status;
- NN_DIGIT t[MAX_NN_DIGITS], u[MAX_NN_DIGITS];
- NN_ASSIGN_DIGIT (t, 2, aDigits);
- NN_ModExp (u, t, a, aDigits, a, aDigits);
- status = NN_EQUAL (t, u, aDigits);
- /* Zeroize sensitive information.
- */
- R_memset ((POINTER)u, 0, sizeof (u));
- return (status);
- }
- /*
- *digit function
- */
- /* Computes a = b * c, where b and c are digits.
- Lengths: a[2].
- */
- void NN_DigitMult (NN_DIGIT a[2], NN_DIGIT b, NN_DIGIT c)
- {
- NN_DIGIT t, u;
- NN_HALF_DIGIT bHigh, bLow, cHigh, cLow;
- bHigh = (NN_HALF_DIGIT)HIGH_HALF (b);
- bLow = (NN_HALF_DIGIT)LOW_HALF (b);
- cHigh = (NN_HALF_DIGIT)HIGH_HALF (c);
- cLow = (NN_HALF_DIGIT)LOW_HALF (c);
- a[0] = (NN_DIGIT)bLow * (NN_DIGIT)cLow;
- t = (NN_DIGIT)bLow * (NN_DIGIT)cHigh;
- u = (NN_DIGIT)bHigh * (NN_DIGIT)cLow;
- a[1] = (NN_DIGIT)bHigh * (NN_DIGIT)cHigh;
- if ((t += u) < u)
- a[1] += TO_HIGH_HALF (1);
- u = TO_HIGH_HALF (t);
- if ((a[0] += u) < u)
- a[1]++;
- a[1] += HIGH_HALF (t);
- }
- /* Sets a = b / c, where a and c are digits.
- Lengths: b[2].
- Assumes b[1] < c and HIGH_HALF (c) > 0. For efficiency, c should be
- normalized.
- */
- void NN_DigitDiv (NN_DIGIT *a, NN_DIGIT b[2], NN_DIGIT c)
- {
- NN_DIGIT t[2], u, v;
- NN_HALF_DIGIT aHigh, aLow, cHigh, cLow;
- cHigh = (NN_HALF_DIGIT)HIGH_HALF (c);
- cLow = (NN_HALF_DIGIT)LOW_HALF (c);
- t[0] = b[0];
- t[1] = b[1];
- /* Underestimate high half of quotient and subtract.
- */
- if (cHigh == MAX_NN_HALF_DIGIT)
- aHigh = (NN_HALF_DIGIT)HIGH_HALF (t[1]);
- else
- aHigh = (NN_HALF_DIGIT)(t[1] / (cHigh + 1));
- u = (NN_DIGIT)aHigh * (NN_DIGIT)cLow;
- v = (NN_DIGIT)aHigh * (NN_DIGIT)cHigh;
- if ((t[0] -= TO_HIGH_HALF (u)) > (MAX_NN_DIGIT - TO_HIGH_HALF (u)))
- t[1]--;
- t[1] -= HIGH_HALF (u);
- t[1] -= v;
- /* Correct estimate.
- */
- while ((t[1] > cHigh) ||
- ((t[1] == cHigh) && (t[0] >= TO_HIGH_HALF (cLow)))) {
- if ((t[0] -= TO_HIGH_HALF (cLow)) > MAX_NN_DIGIT - TO_HIGH_HALF (cLow))
- t[1]--;
- t[1] -= cHigh;
- aHigh++;
- }
- /* Underestimate low half of quotient and subtract.
- */
- if (cHigh == MAX_NN_HALF_DIGIT)
- aLow = (NN_HALF_DIGIT)LOW_HALF (t[1]);
- else
- aLow =
- (NN_HALF_DIGIT)((TO_HIGH_HALF (t[1]) + HIGH_HALF (t[0])) / (cHigh + 1));
- u = (NN_DIGIT)aLow * (NN_DIGIT)cLow;
- v = (NN_DIGIT)aLow * (NN_DIGIT)cHigh;
- if ((t[0] -= u) > (MAX_NN_DIGIT - u))
- t[1]--;
- if ((t[0] -= TO_HIGH_HALF (v)) > (MAX_NN_DIGIT - TO_HIGH_HALF (v)))
- t[1]--;
- t[1] -= HIGH_HALF (v);
- /* Correct estimate.
- */
- while ((t[1] > 0) || ((t[1] == 0) && t[0] >= c)) {
- if ((t[0] -= c) > (MAX_NN_DIGIT - c))
- t[1]--;
- aLow++;
- }
- *a = TO_HIGH_HALF (aHigh) + aLow;
- }
- /*
- * LOCAL_MD5 functions
- */
- /* Constants for LOCAL_MD5Transform routine.
- */
- #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 void LOCAL_MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
- static void Encode PROTO_LIST
- ((unsigned char *, UINT4 *, unsigned int));
- static void Decode PROTO_LIST
- ((UINT4 *, unsigned char *, unsigned int));
- static void LOCAL_MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
- static void LOCAL_MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
- 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 LOCAL_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);
- }
- /* LOCAL_MD5 initialization. Begins an LOCAL_MD5 operation, writing a new context.
- */
- void LOCAL_MD5Init (LOCAL_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;
- }
- /* LOCAL_MD5 block update operation. Continues an LOCAL_MD5 message-digest
- operation, processing another message block, and updating the
- context.
- */
- void LOCAL_MD5Update (LOCAL_MD5_CTX *context, unsigned char *input, unsigned int inputLen)
- {
- 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) {
- LOCAL_MD5_memcpy
- ((POINTER)&context->buffer[index], (POINTER)input, partLen);
- LOCAL_MD5Transform (context->state, context->buffer);
- for (i = partLen; i + 63 < inputLen; i += 64)
- LOCAL_MD5Transform (context->state, &input[i]);
- index = 0;
- }
- else
- i = 0;
- /* Buffer remaining input */
- LOCAL_MD5_memcpy
- ((POINTER)&context->buffer[index], (POINTER)&input[i],
- inputLen-i);
- }
- /* LOCAL_MD5 finalization. Ends an LOCAL_MD5 message-digest operation, writing the
- the message digest and zeroizing the context.
- */
- void LOCAL_MD5Final (unsigned char digest[16], LOCAL_MD5_CTX *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);
- LOCAL_MD5Update (context, PADDING, padLen);
- /* Append length (before padding) */
- LOCAL_MD5Update (context, bits, 8);
- /* Store state in digest */
- Encode (digest, context->state, 16);
- /* Zeroize sensitive information.
- */
- LOCAL_MD5_memset ((POINTER)context, 0, sizeof (*context));
- }
- /* LOCAL_MD5 basic transformation. Transforms state based on block.
- */
- static void LOCAL_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.
- */
- LOCAL_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);
- }
- /* Note: Replace "for loop" with standard memcpy if possible.
- */
- static void LOCAL_MD5_memcpy (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 LOCAL_MD5_memset (POINTER output, int value, unsigned int len)
- {
- unsigned int i;
- for (i = 0; i < len; i++)
- ((char *)output)[i] = (char)value;
- }