diff options
Diffstat (limited to 'src/libsec/386/sha1block.s')
| -rw-r--r-- | src/libsec/386/sha1block.s | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/src/libsec/386/sha1block.s b/src/libsec/386/sha1block.s new file mode 100644 index 00000000..7d0696d0 --- /dev/null +++ b/src/libsec/386/sha1block.s @@ -0,0 +1,214 @@ +.text + +.p2align 2,0x90 +.globl _sha1block + .type _sha1block, @function +_sha1block: + +/* x = (wp[off-f] ^ wp[off-8] ^ wp[off-14] ^ wp[off-16]) <<< 1; + * wp[off] = x; + * x += A <<< 5; + * E += 0xca62c1d6 + x; + * x = FN(B,C,D); + * E += x; + * B >>> 2 + */ +#define BSWAPDI BYTE $0x0f; BYTE $0xcf; + +#define BODY(off,FN,V,A,B,C,D,E)\ + movl (off-64)(%ebp), %edi;\ + xorl (off-56)(%ebp), %edi;\ + xorl (off-32)(%ebp), %edi;\ + xorl (off-12)(%ebp), %edi;\ + roll $1, %edi;\ + movl %edi, off(%ebp);\ + leal V(%edi, E, 1), E;\ + movl A, %edi;\ + roll $5, %edi;\ + addl %edi, E;\ + FN(B,C,D)\ + addl %edi, E;\ + rorl $2, B;\ + +#define BODY0(off,FN,V,A,B,C,D,E)\ + movl off(%ebx), %edi;\ + bswap %edi;\ + movl %edi, off(%ebp);\ + leal V(%edi,E,1), E;\ + movl A, %edi;\ + roll $5,%edi;\ + addl %edi,E;\ + FN(B,C,D)\ + addl %edi,E;\ + rorl $2,B;\ + +/* + * fn1 = (((C^D)&B)^D); + */ +#define FN1(B,C,D)\ + movl C, %edi;\ + xorl D, %edi;\ + andl B, %edi;\ + xorl D, %edi;\ + +/* + * fn24 = B ^ C ^ D + */ +#define FN24(B,C,D)\ + movl B, %edi;\ + xorl C, %edi;\ + xorl D, %edi;\ + +/* + * fn3 = ((B ^ C) & (D ^= B)) ^ B + * D ^= B to restore D + */ +#define FN3(B,C,D)\ + movl B, %edi;\ + xorl C, %edi;\ + xorl B, D;\ + andl D, %edi;\ + xorl B, %edi;\ + xorl B, D;\ + +/* + * stack offsets + * void sha1block(uchar *DATA, int LEN, ulong *STATE) + */ +#define DATA 8 +#define LEN 12 +#define STATE 16 + +/* + * stack offsets for locals + * ulong w[80]; + * uchar *edata; + * ulong *w15, *w40, *w60, *w80; + * register local + * ulong *wp = %ebp + * ulong a = eax, b = ebx, c = ecx, d = edx, e = esi + * ulong tmp = edi + */ +#define WARRAY (-4-(80*4)) +#define TMP1 (-8-(80*4)) +#define TMP2 (-12-(80*4)) +#define W15 (-16-(80*4)) +#define W40 (-20-(80*4)) +#define W60 (-24-(80*4)) +#define W80 (-28-(80*4)) +#define EDATA (-32-(80*4)) +#define OLDEBX (-36-(80*4)) +#define OLDESI (-40-(80*4)) +#define OLDEDI (-44-(80*4)) + + /* Prelude */ + pushl %ebp + mov %ebx, OLDEBX(%esp) + mov %esi, OLDESI(%esp) + mov %edi, OLDEDI(%esp) + + movl DATA(%esp), %eax + addl LEN(%esp), %eax + movl %eax, EDATA(%esp) + + leal (WARRAY+15*4)(%esp), %edi /* aw15 */ + movl %edi, W15(%esp) + leal (WARRAY+40*4)(%esp), %edx /* aw40 */ + movl %edx, W40(%esp) + leal (WARRAY+60*4)(%esp), %ecx /* aw60 */ + movl %ecx, W60(%esp) + leal (WARRAY+80*4)(%esp), %edi /* aw80 */ + movl %edi, W80(%esp) + +mainloop: + leal WARRAY(%esp), %ebp /* warray */ + + movl STATE(%esp), %edi /* state */ + movl (%edi),%eax + movl 4(%edi),%ebx + movl %ebx, TMP1(%esp) /* tmp1 */ + movl 8(%edi), %ecx + movl 12(%edi), %edx + movl 16(%edi), %esi + + movl DATA(%esp), %ebx /* data */ + +loop1: + BODY0(0,FN1,0x5a827999,%eax,TMP1(%esp),%ecx,%edx,%esi) + movl %esi,TMP2(%esp) + BODY0(4,FN1,0x5a827999,%esi,%eax,TMP1(%esp),%ecx,%edx) + movl TMP1(%esp),%esi + BODY0(8,FN1,0x5a827999,%edx,TMP2(%esp),%eax,%esi,%ecx) + BODY0(12,FN1,0x5a827999,%ecx,%edx,TMP2(%esp),%eax,%esi) + movl %esi,TMP1(%esp) + BODY0(16,FN1,0x5a827999,%esi,%ecx,%edx,TMP2(%esp),%eax) + movl TMP2(%esp),%esi + + addl $20, %ebx + addl $20, %ebp + cmpl W15(%esp), %ebp /* w15 */ + jb loop1 + + BODY0(0,FN1,0x5a827999,%eax,TMP1(%esp),%ecx,%edx,%esi) + addl $4, %ebx + MOVL %ebx, DATA(%esp) /* data */ + MOVL TMP1(%esp),%ebx + + BODY(4,FN1,0x5a827999,%esi,%eax,%ebx,%ecx,%edx) + BODY(8,FN1,0x5a827999,%edx,%esi,%eax,%ebx,%ecx) + BODY(12,FN1,0x5a827999,%ecx,%edx,%esi,%eax,%ebx) + BODY(16,FN1,0x5a827999,%ebx,%ecx,%edx,%esi,%eax) + + addl $20, %ebp + +loop2: + BODY(0,FN24,0x6ed9eba1,%eax,%ebx,%ecx,%edx,%esi) + BODY(4,FN24,0x6ed9eba1,%esi,%eax,%ebx,%ecx,%edx) + BODY(8,FN24,0x6ed9eba1,%edx,%esi,%eax,%ebx,%ecx) + BODY(12,FN24,0x6ed9eba1,%ecx,%edx,%esi,%eax,%ebx) + BODY(16,FN24,0x6ed9eba1,%ebx,%ecx,%edx,%esi,%eax) + + addl $20,%ebp + cmpl W40(%esp), %ebp + jb loop2 + +loop3: + BODY(0,FN3,0x8f1bbcdc,%eax,%ebx,%ecx,%edx,%esi) + BODY(4,FN3,0x8f1bbcdc,%esi,%eax,%ebx,%ecx,%edx) + BODY(8,FN3,0x8f1bbcdc,%edx,%esi,%eax,%ebx,%ecx) + BODY(12,FN3,0x8f1bbcdc,%ecx,%edx,%esi,%eax,%ebx) + BODY(16,FN3,0x8f1bbcdc,%ebx,%ecx,%edx,%esi,%eax) + + addl $20, %ebp + cmpl W60(%esp), %ebp /* w60 */ + jb loop3 + +loop4: + BODY(0,FN24,0xca62c1d6,%eax,%ebx,%ecx,%edx,%esi) + BODY(4,FN24,0xca62c1d6,%esi,%eax,%ebx,%ecx,%edx) + BODY(8,FN24,0xca62c1d6,%edx,%esi,%eax,%ebx,%ecx) + BODY(12,FN24,0xca62c1d6,%ecx,%edx,%esi,%eax,%ebx) + BODY(16,FN24,0xca62c1d6,%ebx,%ecx,%edx,%esi,%eax) + + addl $20, %ebp + cmpl W80(%esp), %ebp /* w80 */ + jb loop4 + + movl STATE(%esp), %edi /* state */ + addl %eax, 0(%edi) + addl %ebx, 4(%edi) + addl %ecx, 8(%edi) + addl %edx, 12(%edi) + addl %esi, 16(%edi) + + movl EDATA(%esp), %edi /* edata */ + cmpl %edi, DATA(%esp) /* data */ + jb mainloop + + /* Postlude */ + mov OLDEBX(%esp), %ebx + mov OLDESI(%esp), %esi + mov OLDEDI(%esp), %edi + movl %esp, %ebp + leave + ret |