X-Git-Url: https://git.cryptolib.org/?a=blobdiff_plain;ds=sidebyside;f=twister%2Ftwister224.S;fp=twister%2Ftwister224.S;h=e97ed5540b2c465d7133d1bca0be3f0411518d42;hb=4f50c75ee5a6cc88bf7ea71957ed509e298e6c25;hp=0000000000000000000000000000000000000000;hpb=7701e318e4e2bac7f84dbf6e368f1501814948fc;p=avr-crypto-lib.git

diff --git a/twister/twister224.S b/twister/twister224.S
new file mode 100644
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--- /dev/null
+++ b/twister/twister224.S
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+/* twister224.S */
+/*
+    This file is part of the AVR-Crypto-Lib.
+    Copyright (C) 2008  Daniel Otte (daniel.otte@rub.de)
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * \file     twister224.S
+ * \email    daniel.otte@rub.de
+ * \author   Daniel Otte 
+ * \date     2008-12-28
+ * \license  GPLv3 or later
+ * 
+ */
+ 
+#include "avr-asm-macros.S"
+/*********************************************************************/
+/* void twister224(void* dest, void* msg, uint32_t msg_length_b) */
+/*
+ * param dest:         r24:r25
+ * param msg:          r22:r23
+ * param msg_length_b: r18:r21
+ */
+ 
+CTX_SAVE0 = 10
+CTX_SAVE1 = 11
+DST_SAVE0 = 14
+DST_SAVE1 = 15
+MSG_LEN0  = 16
+MSG_LEN1  = 17
+MSG_LEN2  = 12
+MSG_LEN3  = 13
+MSG_SAVE0 = 28
+MSG_SAVE1 = 29
+ 
+.global twister224
+twister224:
+	push_range 10, 17
+	push r28
+	push r29
+	stack_alloc_large 64+2*8
+	adiw r30, 1
+	movw CTX_SAVE0, r30
+	movw DST_SAVE0, r24
+	movw MSG_SAVE0, r22
+	movw MSG_LEN0, r18
+	movw MSG_LEN2, r20
+	movw r24, CTX_SAVE0
+	ldi r22, lo8(224)
+	ldi r23, hi8(224)
+	rcall twister_small_init
+1:
+	tst MSG_LEN3
+	brne 2f
+	tst MSG_LEN2
+	brne 2f
+	cpi MSG_LEN1, 2
+	brmi 3f
+2:
+	movw r24, CTX_SAVE0
+	movw r22, MSG_SAVE0
+	rcall twister_small_nextBlock
+	adiw MSG_SAVE0, 63
+	adiw MSG_SAVE0,  1	
+	subi MSG_LEN1, 2
+	sbc MSG_LEN2, r1
+	sbc MSG_LEN3, r1
+	rjmp 1b
+3:
+	movw r24, CTX_SAVE0
+	movw r22, MSG_SAVE0
+	movw r20, MSG_LEN0
+	rcall twister_small_lastBlock
+	
+	movw r24, DST_SAVE0
+	movw r22, CTX_SAVE0
+	ldi r20, lo8(224)
+	ldi r21, hi8(224)
+	rcall twister_small_ctx2hash
+
+	stack_free_large 64+2*8
+	pop r29
+	pop r28
+	pop_range 10, 17
+	ret
+