1 /* AES (Rijndael) implementation (FIPS PUB 197) for x86_64
3 * Copyright (C) 2005 Andreas Steinmetz, <ast@domdv.de>
6 * This code can be distributed under the terms of the GNU General Public
7 * License (GPL) Version 2 provided that the above header down to and
8 * including this sentence is retained in full.
18 #include <linux/linkage.h>
19 #include <asm/asm-offsets.h>
52 #define prologue(FUNC,KEY,B128,B192,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11) \
61 movl 12(r7),r7 ## E; \
62 movl 480(r8),r10 ## E; \
63 xorl -48(r9),r5 ## E; \
64 xorl -44(r9),r1 ## E; \
65 xorl -40(r9),r6 ## E; \
66 xorl -36(r9),r7 ## E; \
73 #define epilogue(FUNC,r1,r2,r3,r4,r5,r6,r7,r8,r9) \
79 movl r8 ## E,12(r9); \
83 #define round(TAB,OFFSET,r1,r2,r3,r4,r5,r6,r7,r8,ra,rb,rc,rd) \
84 movzbl r2 ## H,r5 ## E; \
85 movzbl r2 ## L,r6 ## E; \
86 movl TAB+1024(,r5,4),r5 ## E;\
87 movw r4 ## X,r2 ## X; \
88 movl TAB(,r6,4),r6 ## E; \
91 movzbl r4 ## H,r7 ## E; \
92 movzbl r4 ## L,r4 ## E; \
93 xorl OFFSET(r8),ra ## E; \
94 xorl OFFSET+4(r8),rb ## E; \
95 xorl TAB+3072(,r7,4),r5 ## E;\
96 xorl TAB+2048(,r4,4),r6 ## E;\
97 movzbl r1 ## L,r7 ## E; \
98 movzbl r1 ## H,r4 ## E; \
99 movl TAB+1024(,r4,4),r4 ## E;\
100 movw r3 ## X,r1 ## X; \
103 xorl TAB(,r7,4),r5 ## E; \
104 movzbl r3 ## H,r7 ## E; \
105 movzbl r3 ## L,r3 ## E; \
106 xorl TAB+3072(,r7,4),r4 ## E;\
107 xorl TAB+2048(,r3,4),r5 ## E;\
108 movzbl r1 ## H,r7 ## E; \
109 movzbl r1 ## L,r3 ## E; \
111 xorl TAB+3072(,r7,4),r6 ## E;\
112 movl TAB+2048(,r3,4),r3 ## E;\
113 movzbl r1 ## H,r7 ## E; \
114 movzbl r1 ## L,r1 ## E; \
115 xorl TAB+1024(,r7,4),r6 ## E;\
116 xorl TAB(,r1,4),r3 ## E; \
117 movzbl r2 ## H,r1 ## E; \
118 movzbl r2 ## L,r7 ## E; \
120 xorl TAB+3072(,r1,4),r3 ## E;\
121 xorl TAB+2048(,r7,4),r4 ## E;\
122 movzbl r2 ## H,r1 ## E; \
123 movzbl r2 ## L,r2 ## E; \
124 xorl OFFSET+8(r8),rc ## E; \
125 xorl OFFSET+12(r8),rd ## E; \
126 xorl TAB+1024(,r1,4),r3 ## E;\
127 xorl TAB(,r2,4),r4 ## E;
129 #define move_regs(r1,r2,r3,r4) \
130 movl r3 ## E,r1 ## E; \
131 movl r4 ## E,r2 ## E;
133 #define entry(FUNC,KEY,B128,B192) \
134 prologue(FUNC,KEY,B128,B192,R2,R8,R7,R9,R1,R3,R4,R6,R10,R5,R11)
136 #define return(FUNC) epilogue(FUNC,R8,R2,R9,R7,R5,R6,R3,R4,R11)
138 #define encrypt_round(TAB,OFFSET) \
139 round(TAB,OFFSET,R1,R2,R3,R4,R5,R6,R7,R10,R5,R6,R3,R4) \
140 move_regs(R1,R2,R5,R6)
142 #define encrypt_final(TAB,OFFSET) \
143 round(TAB,OFFSET,R1,R2,R3,R4,R5,R6,R7,R10,R5,R6,R3,R4)
145 #define decrypt_round(TAB,OFFSET) \
146 round(TAB,OFFSET,R2,R1,R4,R3,R6,R5,R7,R10,R5,R6,R3,R4) \
147 move_regs(R1,R2,R5,R6)
149 #define decrypt_final(TAB,OFFSET) \
150 round(TAB,OFFSET,R2,R1,R4,R3,R6,R5,R7,R10,R5,R6,R3,R4)
152 /* void aes_enc_blk(stuct crypto_tfm *tfm, u8 *out, const u8 *in) */
154 entry(aes_enc_blk,0,.Le128,.Le192)
155 encrypt_round(crypto_ft_tab,-96)
156 encrypt_round(crypto_ft_tab,-80)
157 .Le192: encrypt_round(crypto_ft_tab,-64)
158 encrypt_round(crypto_ft_tab,-48)
159 .Le128: encrypt_round(crypto_ft_tab,-32)
160 encrypt_round(crypto_ft_tab,-16)
161 encrypt_round(crypto_ft_tab, 0)
162 encrypt_round(crypto_ft_tab, 16)
163 encrypt_round(crypto_ft_tab, 32)
164 encrypt_round(crypto_ft_tab, 48)
165 encrypt_round(crypto_ft_tab, 64)
166 encrypt_round(crypto_ft_tab, 80)
167 encrypt_round(crypto_ft_tab, 96)
168 encrypt_final(crypto_fl_tab,112)
171 /* void aes_dec_blk(struct crypto_tfm *tfm, u8 *out, const u8 *in) */
173 entry(aes_dec_blk,240,.Ld128,.Ld192)
174 decrypt_round(crypto_it_tab,-96)
175 decrypt_round(crypto_it_tab,-80)
176 .Ld192: decrypt_round(crypto_it_tab,-64)
177 decrypt_round(crypto_it_tab,-48)
178 .Ld128: decrypt_round(crypto_it_tab,-32)
179 decrypt_round(crypto_it_tab,-16)
180 decrypt_round(crypto_it_tab, 0)
181 decrypt_round(crypto_it_tab, 16)
182 decrypt_round(crypto_it_tab, 32)
183 decrypt_round(crypto_it_tab, 48)
184 decrypt_round(crypto_it_tab, 64)
185 decrypt_round(crypto_it_tab, 80)
186 decrypt_round(crypto_it_tab, 96)
187 decrypt_final(crypto_il_tab,112)