diff options
Diffstat (limited to 'mdk-stage1/dietlibc/i386/md5asm.S')
-rw-r--r-- | mdk-stage1/dietlibc/i386/md5asm.S | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/i386/md5asm.S b/mdk-stage1/dietlibc/i386/md5asm.S new file mode 100644 index 000000000..a99a92934 --- /dev/null +++ b/mdk-stage1/dietlibc/i386/md5asm.S @@ -0,0 +1,300 @@ +#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 + + |