[keccak-asm] *_init in asm

[avr-crypto-lib.git] / keccak / keccak-asm.S

diff --git a/keccak/keccak-asm.S b/keccak/keccak-asm.S
index f1fc07a10e561159ec9fd74b3b63c4cc139c18b0..393535b1407c1dcb83db25942ccf6778fcab99d4 100644 (file)
--- a/keccak/keccak-asm.S
+++ b/keccak/keccak-asm.S
@@ -725,3 +725,67 @@ keccak_ctx2hash:
        ret
        .endfunc
 
+
+       .global keccak224_init
+       .func keccak224_init
+keccak224_init:
+       movw XL, r24
+       ldi r24, lo8(1152)
+       ldi r25, hi8(1152)
+       rjmp keccak_init_1
+       .endfunc
+
+       .global keccak384_init
+       .func keccak384_init
+keccak384_init:
+       movw XL, r24
+       ldi r24, lo8( 832)
+       ldi r25, hi8( 832)
+       rjmp keccak_init_1
+       .endfunc
+
+       .global keccak512_init
+       .func keccak512_init
+keccak512_init:
+       movw XL, r24
+       ldi r24, lo8( 576)
+       ldi r25, hi8( 576)
+       rjmp keccak_init_1
+       .endfunc
+
+       .global keccak256_init
+       .func keccak256_init
+keccak256_init:
+       movw r22, r24
+       ldi r24, lo8(1088)
+       ldi r25, hi8(1088)
+       .endfunc
+/*
+void keccak_init(uint16_t r, keccak_ctx_t* ctx){
+       memset(ctx->a, 0x00, 5 * 5 * 8);
+       ctx->r = r;
+       ctx->bs = (uint8_t)(r / 8);
+}
+*/
+       .global keccak_init
+       .func keccak_init
+keccak_init:
+       movw XL, r22
+keccak_init_1:
+       ldi r22, 200
+10:
+       st X+, __zero_reg__
+       dec r22
+       brne 10b
+       st X+, r24
+       st X+, r25
+       lsr r25
+       ror r24
+       lsr r25
+       ror r24
+       lsr r25
+       ror r24
+       st X+, r24
+       ret
+       .endfunc
+