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/*************************************************
* SHA-160 Source File *
* (C) 1999-2006 The Botan Project *
*************************************************/
#include <botan/asm_macr.h>
START_LISTING(sha1core.S)
START_FUNCTION(sha160_core)
SPILL_REGS()
#define PUSHED 4
ASSIGN(EBP, ARG(2))
ASSIGN(EDI, ARG(3))
ZEROIZE(ESI)
START_LOOP(.LOAD_INPUT)
ADD_IMM(ESI, 4)
ASSIGN(EAX, ARRAY4(EBP, 0))
ASSIGN(EBX, ARRAY4(EBP, 1))
ASSIGN(ECX, ARRAY4(EBP, 2))
ASSIGN(EDX, ARRAY4(EBP, 3))
ADD_IMM(EBP, 16)
BSWAP(EAX)
BSWAP(EBX)
BSWAP(ECX)
BSWAP(EDX)
ASSIGN(ARRAY4_INDIRECT(EDI,ESI,-4), EAX)
ASSIGN(ARRAY4_INDIRECT(EDI,ESI,-3), EBX)
ASSIGN(ARRAY4_INDIRECT(EDI,ESI,-2), ECX)
ASSIGN(ARRAY4_INDIRECT(EDI,ESI,-1), EDX)
LOOP_UNTIL(ESI, IMM(16), .LOAD_INPUT)
ADD2_IMM(EBP, EDI, 64)
START_LOOP(.EXPANSION)
ADD_IMM(ESI, 4)
ZEROIZE(EAX)
ASSIGN(EBX, ARRAY4(EBP, -1))
ASSIGN(ECX, ARRAY4(EBP, -2))
ASSIGN(EDX, ARRAY4(EBP, -3))
XOR(EAX, ARRAY4(EBP, -5))
XOR(EBX, ARRAY4(EBP, -6))
XOR(ECX, ARRAY4(EBP, -7))
XOR(EDX, ARRAY4(EBP, -8))
XOR(EAX, ARRAY4(EBP, -11))
XOR(EBX, ARRAY4(EBP, -12))
XOR(ECX, ARRAY4(EBP, -13))
XOR(EDX, ARRAY4(EBP, -14))
XOR(EAX, ARRAY4(EBP, -13))
XOR(EBX, ARRAY4(EBP, -14))
XOR(ECX, ARRAY4(EBP, -15))
XOR(EDX, ARRAY4(EBP, -16))
ROTL_IMM(EDX, 1)
ROTL_IMM(ECX, 1)
ROTL_IMM(EBX, 1)
XOR(EAX, EDX)
ROTL_IMM(EAX, 1)
ASSIGN(ARRAY4(EBP, 0), EDX)
ASSIGN(ARRAY4(EBP, 1), ECX)
ASSIGN(ARRAY4(EBP, 2), EBX)
ASSIGN(ARRAY4(EBP, 3), EAX)
ADD_IMM(EBP, 16)
LOOP_UNTIL(ESI, IMM(80), .EXPANSION)
ASSIGN(EBP, ARG(1))
ASSIGN(EAX, ARRAY4(EBP, 0))
ASSIGN(EBX, ARRAY4(EBP, 1))
ASSIGN(ECX, ARRAY4(EBP, 2))
ASSIGN(EDX, ARRAY4(EBP, 3))
ASSIGN(ESI, ARRAY4(EBP, 4))
#define MAGIC1 0x5A827999
#define MAGIC2 0x6ED9EBA1
#define MAGIC3 0x8F1BBCDC
#define MAGIC4 0xCA62C1D6
#define T2 EBP
#define F1(A, B, C, D, E, MSG) \
ROTL_IMM(A, 5) ; \
ADD(E, ARRAY4(EDI, MSG)) ; \
ASSIGN(T2, C) ; \
XOR(T2, D) ; \
AND(T2, B) ; \
XOR(T2, D) ; \
ROTR_IMM(B, 2) ; \
ADD(E, A) ; \
ADD3_IMM(E, T2, MAGIC1) ; \
ROTR_IMM(A, 5) ;
#define F2_OR_F4(A, B, C, D, E, MSG, MAGIC) \
ROTL_IMM(A, 5) ; \
ADD(E, ARRAY4(EDI, MSG)) ; \
ASSIGN(T2, D) ; \
XOR(T2, C) ; \
XOR(T2, B) ; \
ROTR_IMM(B, 2) ; \
ADD(E, A) ; \
ADD3_IMM(E, T2, MAGIC) ; \
ROTR_IMM(A, 5) ;
#define F3(A, B, C, D, E, MSG) \
ROTL_IMM(A, 5) ; \
ADD(E, ARRAY4(EDI, MSG)) ; \
ASSIGN(T2, B) ; \
OR(T2, C) ; \
AND(T2, D) ; \
ASSIGN(ARRAY4(EDI, MSG), B) ; \
AND(ARRAY4(EDI, MSG), C) ; \
OR(T2, ARRAY4(EDI, MSG)) ; \
ROTR_IMM(B, 2) ; \
ADD(E, A) ; \
ADD3_IMM(E, T2, MAGIC3) ; \
ROTR_IMM(A, 5) ;
#define F2(A, B, C, D, E, MSG) \
F2_OR_F4(A, B, C, D, E, MSG, MAGIC2)
#define F4(A, B, C, D, E, MSG) \
F2_OR_F4(A, B, C, D, E, MSG, MAGIC4)
#define F_BLOCK(F, MSG) \
F(EAX, EBX, ECX, EDX, ESI, (MSG+0)) \
F(ESI, EAX, EBX, ECX, EDX, (MSG+1)) \
F(EDX, ESI, EAX, EBX, ECX, (MSG+2)) \
F(ECX, EDX, ESI, EAX, EBX, (MSG+3)) \
F(EBX, ECX, EDX, ESI, EAX, (MSG+4))
F_BLOCK(F1, 0)
F_BLOCK(F1, 5)
F_BLOCK(F1, 10)
F_BLOCK(F1, 15)
F_BLOCK(F2, 20)
F_BLOCK(F2, 25)
F_BLOCK(F2, 30)
F_BLOCK(F2, 35)
F_BLOCK(F3, 40)
F_BLOCK(F3, 45)
F_BLOCK(F3, 50)
F_BLOCK(F3, 55)
F_BLOCK(F4, 60)
F_BLOCK(F4, 65)
F_BLOCK(F4, 70)
F_BLOCK(F4, 75)
ASSIGN(EBP, ARG(1))
ADD(ARRAY4(EBP, 0), EAX)
ADD(ARRAY4(EBP, 1), EBX)
ADD(ARRAY4(EBP, 2), ECX)
ADD(ARRAY4(EBP, 3), EDX)
ADD(ARRAY4(EBP, 4), ESI)
RESTORE_REGS()
END_FUNCTION(sha160_core)
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