#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 // #define F(x, y, z) (x & y) + (~x & z) = x&y + (z - z&x) = z + y&x - z&x //#define F(x, y, z) movl x,%ebx; movl x,%eax; notl %ebx; andl y,%eax; andl z,%ebx; addl %ebx,%eax #define F(x, y, z) movl y,%eax; movl z,%ebx; andl x,%eax; andl x,%ebx; addl z,%eax; subl %ebx,%eax // #define G(x, y, z) (x & z) + (y & ~z) = x&z + (y - y&z) = y + x&z - y&z #define G(x, y, z) movl z,%ebx; movl z,%eax; notl %ebx; andl x,%eax; andl y,%ebx; addl %ebx,%eax //#define G(x, y, z) movl x,%eax; movl y,%ebx; andl z,%eax; andl z,%ebx; addl y,%eax; subl %ebx,%eax //#define G(x, y, z) movl z,%eax; movl z,%ebx; andl x,%eax; andl y,%ebx; addl y,%eax; subl %ebx,%eax // #define H(x, y, z) x ^ y ^ z #define H(x, y, z) movl z,%eax; xorl y,%eax; xorl x,%eax // #define I(x, y, z) y ^ (x | ~z) #define I(x, y, z) movl z,%eax; notl %eax; orl x,%eax; xorl y,%eax // #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n)))) #define ROTATE_LEFT(x, n) roll $n,x // #define FF(a, b, c, d, x, s, ac) { (a) += F (b, c, d) + (x) + (word)(ac); (a) = ROTATE_LEFT (a, s); (a) += (b); } // #define GG(a, b, c, d, x, s, ac) { (a) += G (b, c, d) + (x) + (word)(ac); (a) = ROTATE_LEFT (a, s); (a) += (b); } // #define HH(a, b, c, d, x, s, ac) { (a) += H (b, c, d) + (x) + (word)(ac); (a) = ROTATE_LEFT (a, s); (a) += (b); } // #define II(a, b, c, d, x, s, ac) { (a) += I (b, c, d) + (x) + (word)(ac); (a) = ROTATE_LEFT (a, s); (a) += (b); } #define FF(a, b, c, d, x, s, ac) addl x, a; addl $ac,a; F (b, c, d); addl %eax,a; roll $s,a; addl b,a #define GG(a, b, c, d, x, s, ac) addl x, a; addl $ac,a; G (b, c, d); addl %eax,a; roll $s,a; addl b,a #define HH(a, b, c, d, x, s, ac) addl x, a; addl $ac,a; H (b, c, d); addl %eax,a; roll $s,a; addl b,a #define II(a, b, c, d, x, s, ac) addl x, a; addl $ac,a; I (b, c, d); addl %eax,a; roll $s,a; addl b,a // // x is ecx // word a = state [0]; // a is edx // word b = state [1]; // b is esi // word c = state [2]; // c is edi // word d = state [3]; // d is ebp #define X(n) 4*(n)(%ecx) #define X0 (%ecx) #define a %edx #define b %esi #define c %edi #define d %ebp /* MD5 basic transformation: Transforms state based on data block */ // void __MD5Transform ( word state[4], const word* x, size_t repeat ) .text .type __MD5Transform, @function .align 32 .global __MD5Transform .align 32 .Lrepeat: /* Round 1 */ FF (a, b, c, d, X0 , 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, X0 , S24, 0xe9b6c7aa); /* 20 */ GG (a, b, c, d, X( 5), S21, 0xd62f105d); /* 21 */ GG (d, a, b, c, X(10), S22, 0x02441453); /* 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, X0 , S32, 0xeaa127fa); /* 42 */ HH (c, d, a, b, X( 3), S33, 0xd4ef3085); /* 43 */ HH (b, c, d, a, X( 6), S34, 0x04881d05); /* 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, X0 , 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; addl $64,%ecx movl 4+32(%esp),%eax // state addl (%eax),a addl 4(%eax),b addl 8(%eax),c addl 12(%eax),d movl a, (%eax) movl b, 4(%eax) movl c, 8(%eax) movl d,12(%eax) .Lstart: decl 12+32(%esp) jns .Lrepeat popal ret __MD5Transform: __MD5TransformLocal: pushal movl 8+32(%esp),%ecx // x movl 4+32(%esp),%eax // state movl (%eax),a movl 4(%eax),b movl 8(%eax),c movl 12(%eax),d jmp .Lstart .Lende: .size __MD5Transform, .Lende-__MD5Transform .type MD5Init,@function .global MD5Init MD5Init: movl 4(%esp), %ecx xorl %eax,%eax movl $0x67452301, (%ecx) movl $0xefcdab89, 4(%ecx) movl $0x98badcfe, 8(%ecx) movl $0x10325476, 12(%ecx) movl %eax, 16(%ecx) movl %eax, 20(%ecx) ret .global MD5Update .type MD5Update,@function // void MD5Update ( MD5_CTX* context, const byte* input, size_t inputBytes ) #define CONTEXT 4+32(%esp) #define INPUT 8+32(%esp) #define INPUTBYTES 12+32(%esp) #define COUNT 16(%ebx) #define BUFFER 24(%ebx) MD5Update: pushal cld movl CONTEXT, %ebx // ByteIndex = (context->count[0] >> 3) & 0x3F; movl COUNT, %ebp shrl $3, %ebp andl $63,%ebp // ebp = ByteIndex // if ( (context->count[0] += inputBytes << 3 ) < (inputBytes << 3) ) // context->count[1]++; // context->count[1] += inputBytes >> (32-3); movl $8, %eax mull INPUTBYTES addl %eax, 0+COUNT adcl %edx, 4+COUNT // partLen = 64 - ByteIndex; movl $64, %eax subl %ebp, %eax // eax = partLen // i = 0; // if ( partLen <= inputBytes ) { xorl %ecx,%ecx // ecx = i cmpl INPUTBYTES, %eax ja .Lende2 // memcpy ( context->buffer + ByteIndex, input, partLen ); leal 24(%ebx,%ebp,1), %edi movl INPUT, %esi movl %eax, %ecx rep movsb // MD5Transform ( context->state, context->buffer, 1 ); pushl $1 leal BUFFER, %ecx pushl %ecx push %ebx call __MD5TransformLocal // len = (inputBytes - partLen) / 64; movl 12+INPUTBYTES, %ecx subl %eax, %ecx shrl $6, %ecx // MD5Transform ( context->state, input+partLen, len ); pushl %ecx pushl %esi pushl %ebx call __MD5TransformLocal addl $24,%esp // i = partLen + 64 * len; // ByteIndex = 0; shll $6, %ecx addl %eax, %ecx xorl %ebp, %ebp .Lende2: // } // memcpy ( context->buffer + ByteIndex, input + i, inputBytes - i ); movl INPUT, %esi addl %ecx, %esi negl %ecx addl INPUTBYTES, %ecx leal 24(%ebx,%ebp,1), %edi rep movsb popal ret