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/*
* rfc1321 requires that I include this. The code is new. The constants
* all come from the rfc (hence the copyright). We trade a table for the
* macros in rfc. The total size is a lot less. -- presotto
*
* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
* rights reserved.
*
* License to copy and use this software is granted provided that it
* is identified as the "RSA Data Security, Inc. MD5 Message-Digest
* Algorithm" in all material mentioning or referencing this software
* or this function.
*
* License is also granted to make and use derivative works provided
* that such works are identified as "derived from the RSA Data
* Security, Inc. MD5 Message-Digest Algorithm" in all material
* mentioning or referencing the derived work.
*
* RSA Data Security, Inc. makes no representations concerning either
* the merchantability of this software or the suitability of this
* software forany particular purpose. It is provided "as is"
* without express or implied warranty of any kind.
* These notices must be retained in any copies of any part of this
* documentation and/or software.
*/
#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 PAYME(x) $ ## x
/*
* SI is data
* a += FN(B,C,D);
* a += x[sh] + t[sh];
* a = (a << S11) | (a >> (32 - S11));
* a += b;
*/
#define BODY1(off,V,FN,SH,A,B,C,D)\
FN(B,C,D)\
leal V(A, %edi, 1), A;\
addl off(%ebp), A;\
roll PAYME(SH), A;\
addl B, A;\
#define BODY(off,V,FN,SH,A,B,C,D)\
FN(B,C,D)\
leal V(A, %edi, 1), A;\
addl (off)(%ebp), A;\
roll PAYME(SH), A;\
addl B,A;\
/*
* fn1 = ((c ^ d) & b) ^ d
*/
#define FN1(B,C,D)\
movl C, %edi;\
xorl D, %edi;\
andl B, %edi;\
xorl D, %edi;\
/*
* fn2 = ((b ^ c) & d) ^ c;
*/
#define FN2(B,C,D)\
movl B, %edi;\
xorl C, %edi;\
andl D, %edi;\
xorl C, %edi;\
/*
* fn3 = b ^ c ^ d;
*/
#define FN3(B,C,D)\
movl B, %edi;\
xorl C, %edi;\
xorl D, %edi;\
/*
* fn4 = c ^ (b | ~d);
*/
#define FN4(B,C,D)\
movl D, %edi;\
xorl $-1, %edi;\
orl B, %edi;\
xorl C, %edi;\
#define STACKSIZE 20
#define DATA (STACKSIZE+8)
#define LEN (STACKSIZE+12)
#define STATE (STACKSIZE+16)
#define EDATA (STACKSIZE-4)
#define OLDEBX (STACKSIZE-8)
#define OLDESI (STACKSIZE-12)
#define OLDEDI (STACKSIZE-16)
.text
.p2align 2,0x90
.globl _md5block
.type _md5block, @function
_md5block:
/* Prelude */
pushl %ebp
subl $(STACKSIZE), %esp
movl %ebx, OLDEBX(%esp)
movl %esi, OLDESI(%esp)
movl %edi, OLDEDI(%esp)
movl DATA(%esp), %eax
addl LEN(%esp), %eax
movl %eax, EDATA(%esp)
movl DATA(%esp), %ebp
0:
movl STATE(%esp), %esi
movl (%esi), %eax
movl 4(%esi), %ebx
movl 8(%esi), %ecx
movl 12(%esi), %edx
BODY1( 0*4,0xd76aa478,FN1,S11,%eax,%ebx,%ecx,%edx)
BODY1( 1*4,0xe8c7b756,FN1,S12,%edx,%eax,%ebx,%ecx)
BODY1( 2*4,0x242070db,FN1,S13,%ecx,%edx,%eax,%ebx)
BODY1( 3*4,0xc1bdceee,FN1,S14,%ebx,%ecx,%edx,%eax)
BODY1( 4*4,0xf57c0faf,FN1,S11,%eax,%ebx,%ecx,%edx)
BODY1( 5*4,0x4787c62a,FN1,S12,%edx,%eax,%ebx,%ecx)
BODY1( 6*4,0xa8304613,FN1,S13,%ecx,%edx,%eax,%ebx)
BODY1( 7*4,0xfd469501,FN1,S14,%ebx,%ecx,%edx,%eax)
BODY1( 8*4,0x698098d8,FN1,S11,%eax,%ebx,%ecx,%edx)
BODY1( 9*4,0x8b44f7af,FN1,S12,%edx,%eax,%ebx,%ecx)
BODY1(10*4,0xffff5bb1,FN1,S13,%ecx,%edx,%eax,%ebx)
BODY1(11*4,0x895cd7be,FN1,S14,%ebx,%ecx,%edx,%eax)
BODY1(12*4,0x6b901122,FN1,S11,%eax,%ebx,%ecx,%edx)
BODY1(13*4,0xfd987193,FN1,S12,%edx,%eax,%ebx,%ecx)
BODY1(14*4,0xa679438e,FN1,S13,%ecx,%edx,%eax,%ebx)
BODY1(15*4,0x49b40821,FN1,S14,%ebx,%ecx,%edx,%eax)
BODY( 1*4,0xf61e2562,FN2,S21,%eax,%ebx,%ecx,%edx)
BODY( 6*4,0xc040b340,FN2,S22,%edx,%eax,%ebx,%ecx)
BODY(11*4,0x265e5a51,FN2,S23,%ecx,%edx,%eax,%ebx)
BODY( 0*4,0xe9b6c7aa,FN2,S24,%ebx,%ecx,%edx,%eax)
BODY( 5*4,0xd62f105d,FN2,S21,%eax,%ebx,%ecx,%edx)
BODY(10*4,0x02441453,FN2,S22,%edx,%eax,%ebx,%ecx)
BODY(15*4,0xd8a1e681,FN2,S23,%ecx,%edx,%eax,%ebx)
BODY( 4*4,0xe7d3fbc8,FN2,S24,%ebx,%ecx,%edx,%eax)
BODY( 9*4,0x21e1cde6,FN2,S21,%eax,%ebx,%ecx,%edx)
BODY(14*4,0xc33707d6,FN2,S22,%edx,%eax,%ebx,%ecx)
BODY( 3*4,0xf4d50d87,FN2,S23,%ecx,%edx,%eax,%ebx)
BODY( 8*4,0x455a14ed,FN2,S24,%ebx,%ecx,%edx,%eax)
BODY(13*4,0xa9e3e905,FN2,S21,%eax,%ebx,%ecx,%edx)
BODY( 2*4,0xfcefa3f8,FN2,S22,%edx,%eax,%ebx,%ecx)
BODY( 7*4,0x676f02d9,FN2,S23,%ecx,%edx,%eax,%ebx)
BODY(12*4,0x8d2a4c8a,FN2,S24,%ebx,%ecx,%edx,%eax)
BODY( 5*4,0xfffa3942,FN3,S31,%eax,%ebx,%ecx,%edx)
BODY( 8*4,0x8771f681,FN3,S32,%edx,%eax,%ebx,%ecx)
BODY(11*4,0x6d9d6122,FN3,S33,%ecx,%edx,%eax,%ebx)
BODY(14*4,0xfde5380c,FN3,S34,%ebx,%ecx,%edx,%eax)
BODY( 1*4,0xa4beea44,FN3,S31,%eax,%ebx,%ecx,%edx)
BODY( 4*4,0x4bdecfa9,FN3,S32,%edx,%eax,%ebx,%ecx)
BODY( 7*4,0xf6bb4b60,FN3,S33,%ecx,%edx,%eax,%ebx)
BODY(10*4,0xbebfbc70,FN3,S34,%ebx,%ecx,%edx,%eax)
BODY(13*4,0x289b7ec6,FN3,S31,%eax,%ebx,%ecx,%edx)
BODY( 0*4,0xeaa127fa,FN3,S32,%edx,%eax,%ebx,%ecx)
BODY( 3*4,0xd4ef3085,FN3,S33,%ecx,%edx,%eax,%ebx)
BODY( 6*4,0x04881d05,FN3,S34,%ebx,%ecx,%edx,%eax)
BODY( 9*4,0xd9d4d039,FN3,S31,%eax,%ebx,%ecx,%edx)
BODY(12*4,0xe6db99e5,FN3,S32,%edx,%eax,%ebx,%ecx)
BODY(15*4,0x1fa27cf8,FN3,S33,%ecx,%edx,%eax,%ebx)
BODY( 2*4,0xc4ac5665,FN3,S34,%ebx,%ecx,%edx,%eax)
BODY( 0*4,0xf4292244,FN4,S41,%eax,%ebx,%ecx,%edx)
BODY( 7*4,0x432aff97,FN4,S42,%edx,%eax,%ebx,%ecx)
BODY(14*4,0xab9423a7,FN4,S43,%ecx,%edx,%eax,%ebx)
BODY( 5*4,0xfc93a039,FN4,S44,%ebx,%ecx,%edx,%eax)
BODY(12*4,0x655b59c3,FN4,S41,%eax,%ebx,%ecx,%edx)
BODY( 3*4,0x8f0ccc92,FN4,S42,%edx,%eax,%ebx,%ecx)
BODY(10*4,0xffeff47d,FN4,S43,%ecx,%edx,%eax,%ebx)
BODY( 1*4,0x85845dd1,FN4,S44,%ebx,%ecx,%edx,%eax)
BODY( 8*4,0x6fa87e4f,FN4,S41,%eax,%ebx,%ecx,%edx)
BODY(15*4,0xfe2ce6e0,FN4,S42,%edx,%eax,%ebx,%ecx)
BODY( 6*4,0xa3014314,FN4,S43,%ecx,%edx,%eax,%ebx)
BODY(13*4,0x4e0811a1,FN4,S44,%ebx,%ecx,%edx,%eax)
BODY( 4*4,0xf7537e82,FN4,S41,%eax,%ebx,%ecx,%edx)
BODY(11*4,0xbd3af235,FN4,S42,%edx,%eax,%ebx,%ecx)
BODY( 2*4,0x2ad7d2bb,FN4,S43,%ecx,%edx,%eax,%ebx)
BODY( 9*4,0xeb86d391,FN4,S44,%ebx,%ecx,%edx,%eax)
addl $(16*4), %ebp
movl STATE(%esp), %edi
addl %eax,0(%edi)
addl %ebx,4(%edi)
addl %ecx,8(%edi)
addl %edx,12(%edi)
movl EDATA(%esp), %edi
cmpl %edi, %ebp
jb 0b
/* Postlude */
movl OLDEBX(%esp), %ebx
movl OLDESI(%esp), %esi
movl OLDEDI(%esp), %edi
addl $(STACKSIZE), %esp
popl %ebp
ret
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