1 #!/usr/bin/env perl 2 3 # ==================================================================== 4 # Written by Andy Polyakov <appro (at] fy.chalmers.se> for the OpenSSL 5 # project. The module is, however, dual licensed under OpenSSL and 6 # CRYPTOGAMS licenses depending on where you obtain it. For further 7 # details see http://www.openssl.org/~appro/cryptogams/. 8 # ==================================================================== 9 10 # AES for ARMv4 11 12 # January 2007. 13 # 14 # Code uses single 1K S-box and is >2 times faster than code generated 15 # by gcc-3.4.1. This is thanks to unique feature of ARMv4 ISA, which 16 # allows to merge logical or arithmetic operation with shift or rotate 17 # in one instruction and emit combined result every cycle. The module 18 # is endian-neutral. The performance is ~42 cycles/byte for 128-bit 19 # key. 20 21 # May 2007. 22 # 23 # AES_set_[en|de]crypt_key is added. 24 25 $s0="r0"; 26 $s1="r1"; 27 $s2="r2"; 28 $s3="r3"; 29 $t1="r4"; 30 $t2="r5"; 31 $t3="r6"; 32 $i1="r7"; 33 $i2="r8"; 34 $i3="r9"; 35 36 $tbl="r10"; 37 $key="r11"; 38 $rounds="r12"; 39 40 $code=<<___; 41 .text 42 .code 32 43 44 .type AES_Te,%object 45 .align 5 46 AES_Te: 47 .word 0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d 48 .word 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554 49 .word 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d 50 .word 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a 51 .word 0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87 52 .word 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b 53 .word 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea 54 .word 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b 55 .word 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a 56 .word 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f 57 .word 0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108 58 .word 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f 59 .word 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e 60 .word 0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5 61 .word 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d 62 .word 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f 63 .word 0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e 64 .word 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb 65 .word 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce 66 .word 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497 67 .word 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c 68 .word 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed 69 .word 0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b 70 .word 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a 71 .word 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16 72 .word 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594 73 .word 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81 74 .word 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3 75 .word 0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a 76 .word 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504 77 .word 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163 78 .word 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d 79 .word 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f 80 .word 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739 81 .word 0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47 82 .word 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395 83 .word 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f 84 .word 0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883 85 .word 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c 86 .word 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76 87 .word 0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e 88 .word 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4 89 .word 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6 90 .word 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b 91 .word 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7 92 .word 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0 93 .word 0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25 94 .word 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818 95 .word 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72 96 .word 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651 97 .word 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21 98 .word 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85 99 .word 0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa 100 .word 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12 101 .word 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0 102 .word 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9 103 .word 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133 104 .word 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7 105 .word 0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920 106 .word 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a 107 .word 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17 108 .word 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8 109 .word 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11 110 .word 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a 111 @ Te4[256] 112 .byte 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5 113 .byte 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76 114 .byte 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0 115 .byte 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0 116 .byte 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc 117 .byte 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15 118 .byte 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a 119 .byte 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75 120 .byte 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0 121 .byte 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84 122 .byte 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b 123 .byte 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf 124 .byte 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85 125 .byte 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8 126 .byte 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5 127 .byte 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2 128 .byte 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17 129 .byte 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73 130 .byte 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88 131 .byte 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb 132 .byte 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c 133 .byte 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79 134 .byte 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9 135 .byte 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08 136 .byte 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6 137 .byte 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a 138 .byte 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e 139 .byte 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e 140 .byte 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94 141 .byte 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf 142 .byte 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68 143 .byte 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 144 @ rcon[] 145 .word 0x01000000, 0x02000000, 0x04000000, 0x08000000 146 .word 0x10000000, 0x20000000, 0x40000000, 0x80000000 147 .word 0x1B000000, 0x36000000, 0, 0, 0, 0, 0, 0 148 .size AES_Te,.-AES_Te 149 150 @ void AES_encrypt(const unsigned char *in, unsigned char *out, 151 @ const AES_KEY *key) { 152 .global AES_encrypt 153 .type AES_encrypt,%function 154 .align 5 155 AES_encrypt: 156 sub r3,pc,#8 @ AES_encrypt 157 stmdb sp!,{r1,r4-r12,lr} 158 mov $rounds,r0 @ inp 159 mov $key,r2 160 sub $tbl,r3,#AES_encrypt-AES_Te @ Te 161 162 ldrb $s0,[$rounds,#3] @ load input data in endian-neutral 163 ldrb $t1,[$rounds,#2] @ manner... 164 ldrb $t2,[$rounds,#1] 165 ldrb $t3,[$rounds,#0] 166 orr $s0,$s0,$t1,lsl#8 167 orr $s0,$s0,$t2,lsl#16 168 orr $s0,$s0,$t3,lsl#24 169 ldrb $s1,[$rounds,#7] 170 ldrb $t1,[$rounds,#6] 171 ldrb $t2,[$rounds,#5] 172 ldrb $t3,[$rounds,#4] 173 orr $s1,$s1,$t1,lsl#8 174 orr $s1,$s1,$t2,lsl#16 175 orr $s1,$s1,$t3,lsl#24 176 ldrb $s2,[$rounds,#11] 177 ldrb $t1,[$rounds,#10] 178 ldrb $t2,[$rounds,#9] 179 ldrb $t3,[$rounds,#8] 180 orr $s2,$s2,$t1,lsl#8 181 orr $s2,$s2,$t2,lsl#16 182 orr $s2,$s2,$t3,lsl#24 183 ldrb $s3,[$rounds,#15] 184 ldrb $t1,[$rounds,#14] 185 ldrb $t2,[$rounds,#13] 186 ldrb $t3,[$rounds,#12] 187 orr $s3,$s3,$t1,lsl#8 188 orr $s3,$s3,$t2,lsl#16 189 orr $s3,$s3,$t3,lsl#24 190 191 bl _armv4_AES_encrypt 192 193 ldr $rounds,[sp],#4 @ pop out 194 mov $t1,$s0,lsr#24 @ write output in endian-neutral 195 mov $t2,$s0,lsr#16 @ manner... 196 mov $t3,$s0,lsr#8 197 strb $t1,[$rounds,#0] 198 strb $t2,[$rounds,#1] 199 strb $t3,[$rounds,#2] 200 strb $s0,[$rounds,#3] 201 mov $t1,$s1,lsr#24 202 mov $t2,$s1,lsr#16 203 mov $t3,$s1,lsr#8 204 strb $t1,[$rounds,#4] 205 strb $t2,[$rounds,#5] 206 strb $t3,[$rounds,#6] 207 strb $s1,[$rounds,#7] 208 mov $t1,$s2,lsr#24 209 mov $t2,$s2,lsr#16 210 mov $t3,$s2,lsr#8 211 strb $t1,[$rounds,#8] 212 strb $t2,[$rounds,#9] 213 strb $t3,[$rounds,#10] 214 strb $s2,[$rounds,#11] 215 mov $t1,$s3,lsr#24 216 mov $t2,$s3,lsr#16 217 mov $t3,$s3,lsr#8 218 strb $t1,[$rounds,#12] 219 strb $t2,[$rounds,#13] 220 strb $t3,[$rounds,#14] 221 strb $s3,[$rounds,#15] 222 223 ldmia sp!,{r4-r12,lr} 224 tst lr,#1 225 moveq pc,lr @ be binary compatible with V4, yet 226 bx lr @ interoperable with Thumb ISA:-) 227 .size AES_encrypt,.-AES_encrypt 228 229 .type _armv4_AES_encrypt,%function 230 .align 2 231 _armv4_AES_encrypt: 232 str lr,[sp,#-4]! @ push lr 233 ldr $t1,[$key],#16 234 ldr $t2,[$key,#-12] 235 ldr $t3,[$key,#-8] 236 ldr $i1,[$key,#-4] 237 ldr $rounds,[$key,#240-16] 238 eor $s0,$s0,$t1 239 eor $s1,$s1,$t2 240 eor $s2,$s2,$t3 241 eor $s3,$s3,$i1 242 sub $rounds,$rounds,#1 243 mov lr,#255 244 245 .Lenc_loop: 246 and $i2,lr,$s0,lsr#8 247 and $i3,lr,$s0,lsr#16 248 and $i1,lr,$s0 249 mov $s0,$s0,lsr#24 250 ldr $t1,[$tbl,$i1,lsl#2] @ Te3[s0>>0] 251 ldr $s0,[$tbl,$s0,lsl#2] @ Te0[s0>>24] 252 ldr $t2,[$tbl,$i2,lsl#2] @ Te2[s0>>8] 253 ldr $t3,[$tbl,$i3,lsl#2] @ Te1[s0>>16] 254 255 and $i1,lr,$s1,lsr#16 @ i0 256 and $i2,lr,$s1 257 and $i3,lr,$s1,lsr#8 258 mov $s1,$s1,lsr#24 259 ldr $i1,[$tbl,$i1,lsl#2] @ Te1[s1>>16] 260 ldr $s1,[$tbl,$s1,lsl#2] @ Te0[s1>>24] 261 ldr $i2,[$tbl,$i2,lsl#2] @ Te3[s1>>0] 262 ldr $i3,[$tbl,$i3,lsl#2] @ Te2[s1>>8] 263 eor $s0,$s0,$i1,ror#8 264 eor $s1,$s1,$t1,ror#24 265 eor $t2,$t2,$i2,ror#8 266 eor $t3,$t3,$i3,ror#8 267 268 and $i1,lr,$s2,lsr#8 @ i0 269 and $i2,lr,$s2,lsr#16 @ i1 270 and $i3,lr,$s2 271 mov $s2,$s2,lsr#24 272 ldr $i1,[$tbl,$i1,lsl#2] @ Te2[s2>>8] 273 ldr $i2,[$tbl,$i2,lsl#2] @ Te1[s2>>16] 274 ldr $s2,[$tbl,$s2,lsl#2] @ Te0[s2>>24] 275 ldr $i3,[$tbl,$i3,lsl#2] @ Te3[s2>>0] 276 eor $s0,$s0,$i1,ror#16 277 eor $s1,$s1,$i2,ror#8 278 eor $s2,$s2,$t2,ror#16 279 eor $t3,$t3,$i3,ror#16 280 281 and $i1,lr,$s3 @ i0 282 and $i2,lr,$s3,lsr#8 @ i1 283 and $i3,lr,$s3,lsr#16 @ i2 284 mov $s3,$s3,lsr#24 285 ldr $i1,[$tbl,$i1,lsl#2] @ Te3[s3>>0] 286 ldr $i2,[$tbl,$i2,lsl#2] @ Te2[s3>>8] 287 ldr $i3,[$tbl,$i3,lsl#2] @ Te1[s3>>16] 288 ldr $s3,[$tbl,$s3,lsl#2] @ Te0[s3>>24] 289 eor $s0,$s0,$i1,ror#24 290 eor $s1,$s1,$i2,ror#16 291 eor $s2,$s2,$i3,ror#8 292 eor $s3,$s3,$t3,ror#8 293 294 ldr $t1,[$key],#16 295 ldr $t2,[$key,#-12] 296 ldr $t3,[$key,#-8] 297 ldr $i1,[$key,#-4] 298 eor $s0,$s0,$t1 299 eor $s1,$s1,$t2 300 eor $s2,$s2,$t3 301 eor $s3,$s3,$i1 302 303 subs $rounds,$rounds,#1 304 bne .Lenc_loop 305 306 add $tbl,$tbl,#2 307 308 and $i1,lr,$s0 309 and $i2,lr,$s0,lsr#8 310 and $i3,lr,$s0,lsr#16 311 mov $s0,$s0,lsr#24 312 ldrb $t1,[$tbl,$i1,lsl#2] @ Te4[s0>>0] 313 ldrb $s0,[$tbl,$s0,lsl#2] @ Te4[s0>>24] 314 ldrb $t2,[$tbl,$i2,lsl#2] @ Te4[s0>>8] 315 ldrb $t3,[$tbl,$i3,lsl#2] @ Te4[s0>>16] 316 317 and $i1,lr,$s1,lsr#16 @ i0 318 and $i2,lr,$s1 319 and $i3,lr,$s1,lsr#8 320 mov $s1,$s1,lsr#24 321 ldrb $i1,[$tbl,$i1,lsl#2] @ Te4[s1>>16] 322 ldrb $s1,[$tbl,$s1,lsl#2] @ Te4[s1>>24] 323 ldrb $i2,[$tbl,$i2,lsl#2] @ Te4[s1>>0] 324 ldrb $i3,[$tbl,$i3,lsl#2] @ Te4[s1>>8] 325 eor $s0,$i1,$s0,lsl#8 326 eor $s1,$t1,$s1,lsl#24 327 eor $t2,$i2,$t2,lsl#8 328 eor $t3,$i3,$t3,lsl#8 329 330 and $i1,lr,$s2,lsr#8 @ i0 331 and $i2,lr,$s2,lsr#16 @ i1 332 and $i3,lr,$s2 333 mov $s2,$s2,lsr#24 334 ldrb $i1,[$tbl,$i1,lsl#2] @ Te4[s2>>8] 335 ldrb $i2,[$tbl,$i2,lsl#2] @ Te4[s2>>16] 336 ldrb $s2,[$tbl,$s2,lsl#2] @ Te4[s2>>24] 337 ldrb $i3,[$tbl,$i3,lsl#2] @ Te4[s2>>0] 338 eor $s0,$i1,$s0,lsl#8 339 eor $s1,$s1,$i2,lsl#16 340 eor $s2,$t2,$s2,lsl#24 341 eor $t3,$i3,$t3,lsl#8 342 343 and $i1,lr,$s3 @ i0 344 and $i2,lr,$s3,lsr#8 @ i1 345 and $i3,lr,$s3,lsr#16 @ i2 346 mov $s3,$s3,lsr#24 347 ldrb $i1,[$tbl,$i1,lsl#2] @ Te4[s3>>0] 348 ldrb $i2,[$tbl,$i2,lsl#2] @ Te4[s3>>8] 349 ldrb $i3,[$tbl,$i3,lsl#2] @ Te4[s3>>16] 350 ldrb $s3,[$tbl,$s3,lsl#2] @ Te4[s3>>24] 351 eor $s0,$i1,$s0,lsl#8 352 eor $s1,$s1,$i2,lsl#8 353 eor $s2,$s2,$i3,lsl#16 354 eor $s3,$t3,$s3,lsl#24 355 356 ldr lr,[sp],#4 @ pop lr 357 ldr $t1,[$key,#0] 358 ldr $t2,[$key,#4] 359 ldr $t3,[$key,#8] 360 ldr $i1,[$key,#12] 361 eor $s0,$s0,$t1 362 eor $s1,$s1,$t2 363 eor $s2,$s2,$t3 364 eor $s3,$s3,$i1 365 366 sub $tbl,$tbl,#2 367 mov pc,lr @ return 368 .size _armv4_AES_encrypt,.-_armv4_AES_encrypt 369 370 .global AES_set_encrypt_key 371 .type AES_set_encrypt_key,%function 372 .align 5 373 AES_set_encrypt_key: 374 sub r3,pc,#8 @ AES_set_encrypt_key 375 teq r0,#0 376 moveq r0,#-1 377 beq .Labrt 378 teq r2,#0 379 moveq r0,#-1 380 beq .Labrt 381 382 teq r1,#128 383 beq .Lok 384 teq r1,#192 385 beq .Lok 386 teq r1,#256 387 movne r0,#-1 388 bne .Labrt 389 390 .Lok: stmdb sp!,{r4-r12,lr} 391 sub $tbl,r3,#AES_set_encrypt_key-AES_Te-1024 @ Te4 392 393 mov $rounds,r0 @ inp 394 mov lr,r1 @ bits 395 mov $key,r2 @ key 396 397 ldrb $s0,[$rounds,#3] @ load input data in endian-neutral 398 ldrb $t1,[$rounds,#2] @ manner... 399 ldrb $t2,[$rounds,#1] 400 ldrb $t3,[$rounds,#0] 401 orr $s0,$s0,$t1,lsl#8 402 orr $s0,$s0,$t2,lsl#16 403 orr $s0,$s0,$t3,lsl#24 404 ldrb $s1,[$rounds,#7] 405 ldrb $t1,[$rounds,#6] 406 ldrb $t2,[$rounds,#5] 407 ldrb $t3,[$rounds,#4] 408 orr $s1,$s1,$t1,lsl#8 409 orr $s1,$s1,$t2,lsl#16 410 orr $s1,$s1,$t3,lsl#24 411 ldrb $s2,[$rounds,#11] 412 ldrb $t1,[$rounds,#10] 413 ldrb $t2,[$rounds,#9] 414 ldrb $t3,[$rounds,#8] 415 orr $s2,$s2,$t1,lsl#8 416 orr $s2,$s2,$t2,lsl#16 417 orr $s2,$s2,$t3,lsl#24 418 ldrb $s3,[$rounds,#15] 419 ldrb $t1,[$rounds,#14] 420 ldrb $t2,[$rounds,#13] 421 ldrb $t3,[$rounds,#12] 422 orr $s3,$s3,$t1,lsl#8 423 orr $s3,$s3,$t2,lsl#16 424 orr $s3,$s3,$t3,lsl#24 425 str $s0,[$key],#16 426 str $s1,[$key,#-12] 427 str $s2,[$key,#-8] 428 str $s3,[$key,#-4] 429 430 teq lr,#128 431 bne .Lnot128 432 mov $rounds,#10 433 str $rounds,[$key,#240-16] 434 add $t3,$tbl,#256 @ rcon 435 mov lr,#255 436 437 .L128_loop: 438 and $t2,lr,$s3,lsr#24 439 and $i1,lr,$s3,lsr#16 440 and $i2,lr,$s3,lsr#8 441 and $i3,lr,$s3 442 ldrb $t2,[$tbl,$t2] 443 ldrb $i1,[$tbl,$i1] 444 ldrb $i2,[$tbl,$i2] 445 ldrb $i3,[$tbl,$i3] 446 ldr $t1,[$t3],#4 @ rcon[i++] 447 orr $t2,$t2,$i1,lsl#24 448 orr $t2,$t2,$i2,lsl#16 449 orr $t2,$t2,$i3,lsl#8 450 eor $t2,$t2,$t1 451 eor $s0,$s0,$t2 @ rk[4]=rk[0]^... 452 eor $s1,$s1,$s0 @ rk[5]=rk[1]^rk[4] 453 eor $s2,$s2,$s1 @ rk[6]=rk[2]^rk[5] 454 eor $s3,$s3,$s2 @ rk[7]=rk[3]^rk[6] 455 str $s0,[$key],#16 456 str $s1,[$key,#-12] 457 str $s2,[$key,#-8] 458 str $s3,[$key,#-4] 459 460 subs $rounds,$rounds,#1 461 bne .L128_loop 462 sub r2,$key,#176 463 b .Ldone 464 465 .Lnot128: 466 ldrb $i2,[$rounds,#19] 467 ldrb $t1,[$rounds,#18] 468 ldrb $t2,[$rounds,#17] 469 ldrb $t3,[$rounds,#16] 470 orr $i2,$i2,$t1,lsl#8 471 orr $i2,$i2,$t2,lsl#16 472 orr $i2,$i2,$t3,lsl#24 473 ldrb $i3,[$rounds,#23] 474 ldrb $t1,[$rounds,#22] 475 ldrb $t2,[$rounds,#21] 476 ldrb $t3,[$rounds,#20] 477 orr $i3,$i3,$t1,lsl#8 478 orr $i3,$i3,$t2,lsl#16 479 orr $i3,$i3,$t3,lsl#24 480 str $i2,[$key],#8 481 str $i3,[$key,#-4] 482 483 teq lr,#192 484 bne .Lnot192 485 mov $rounds,#12 486 str $rounds,[$key,#240-24] 487 add $t3,$tbl,#256 @ rcon 488 mov lr,#255 489 mov $rounds,#8 490 491 .L192_loop: 492 and $t2,lr,$i3,lsr#24 493 and $i1,lr,$i3,lsr#16 494 and $i2,lr,$i3,lsr#8 495 and $i3,lr,$i3 496 ldrb $t2,[$tbl,$t2] 497 ldrb $i1,[$tbl,$i1] 498 ldrb $i2,[$tbl,$i2] 499 ldrb $i3,[$tbl,$i3] 500 ldr $t1,[$t3],#4 @ rcon[i++] 501 orr $t2,$t2,$i1,lsl#24 502 orr $t2,$t2,$i2,lsl#16 503 orr $t2,$t2,$i3,lsl#8 504 eor $i3,$t2,$t1 505 eor $s0,$s0,$i3 @ rk[6]=rk[0]^... 506 eor $s1,$s1,$s0 @ rk[7]=rk[1]^rk[6] 507 eor $s2,$s2,$s1 @ rk[8]=rk[2]^rk[7] 508 eor $s3,$s3,$s2 @ rk[9]=rk[3]^rk[8] 509 str $s0,[$key],#24 510 str $s1,[$key,#-20] 511 str $s2,[$key,#-16] 512 str $s3,[$key,#-12] 513 514 subs $rounds,$rounds,#1 515 subeq r2,$key,#216 516 beq .Ldone 517 518 ldr $i1,[$key,#-32] 519 ldr $i2,[$key,#-28] 520 eor $i1,$i1,$s3 @ rk[10]=rk[4]^rk[9] 521 eor $i3,$i2,$i1 @ rk[11]=rk[5]^rk[10] 522 str $i1,[$key,#-8] 523 str $i3,[$key,#-4] 524 b .L192_loop 525 526 .Lnot192: 527 ldrb $i2,[$rounds,#27] 528 ldrb $t1,[$rounds,#26] 529 ldrb $t2,[$rounds,#25] 530 ldrb $t3,[$rounds,#24] 531 orr $i2,$i2,$t1,lsl#8 532 orr $i2,$i2,$t2,lsl#16 533 orr $i2,$i2,$t3,lsl#24 534 ldrb $i3,[$rounds,#31] 535 ldrb $t1,[$rounds,#30] 536 ldrb $t2,[$rounds,#29] 537 ldrb $t3,[$rounds,#28] 538 orr $i3,$i3,$t1,lsl#8 539 orr $i3,$i3,$t2,lsl#16 540 orr $i3,$i3,$t3,lsl#24 541 str $i2,[$key],#8 542 str $i3,[$key,#-4] 543 544 mov $rounds,#14 545 str $rounds,[$key,#240-32] 546 add $t3,$tbl,#256 @ rcon 547 mov lr,#255 548 mov $rounds,#7 549 550 .L256_loop: 551 and $t2,lr,$i3,lsr#24 552 and $i1,lr,$i3,lsr#16 553 and $i2,lr,$i3,lsr#8 554 and $i3,lr,$i3 555 ldrb $t2,[$tbl,$t2] 556 ldrb $i1,[$tbl,$i1] 557 ldrb $i2,[$tbl,$i2] 558 ldrb $i3,[$tbl,$i3] 559 ldr $t1,[$t3],#4 @ rcon[i++] 560 orr $t2,$t2,$i1,lsl#24 561 orr $t2,$t2,$i2,lsl#16 562 orr $t2,$t2,$i3,lsl#8 563 eor $i3,$t2,$t1 564 eor $s0,$s0,$i3 @ rk[8]=rk[0]^... 565 eor $s1,$s1,$s0 @ rk[9]=rk[1]^rk[8] 566 eor $s2,$s2,$s1 @ rk[10]=rk[2]^rk[9] 567 eor $s3,$s3,$s2 @ rk[11]=rk[3]^rk[10] 568 str $s0,[$key],#32 569 str $s1,[$key,#-28] 570 str $s2,[$key,#-24] 571 str $s3,[$key,#-20] 572 573 subs $rounds,$rounds,#1 574 subeq r2,$key,#256 575 beq .Ldone 576 577 and $t2,lr,$s3 578 and $i1,lr,$s3,lsr#8 579 and $i2,lr,$s3,lsr#16 580 and $i3,lr,$s3,lsr#24 581 ldrb $t2,[$tbl,$t2] 582 ldrb $i1,[$tbl,$i1] 583 ldrb $i2,[$tbl,$i2] 584 ldrb $i3,[$tbl,$i3] 585 orr $t2,$t2,$i1,lsl#8 586 orr $t2,$t2,$i2,lsl#16 587 orr $t2,$t2,$i3,lsl#24 588 589 ldr $t1,[$key,#-48] 590 ldr $i1,[$key,#-44] 591 ldr $i2,[$key,#-40] 592 ldr $i3,[$key,#-36] 593 eor $t1,$t1,$t2 @ rk[12]=rk[4]^... 594 eor $i1,$i1,$t1 @ rk[13]=rk[5]^rk[12] 595 eor $i2,$i2,$i1 @ rk[14]=rk[6]^rk[13] 596 eor $i3,$i3,$i2 @ rk[15]=rk[7]^rk[14] 597 str $t1,[$key,#-16] 598 str $i1,[$key,#-12] 599 str $i2,[$key,#-8] 600 str $i3,[$key,#-4] 601 b .L256_loop 602 603 .Ldone: mov r0,#0 604 ldmia sp!,{r4-r12,lr} 605 .Labrt: tst lr,#1 606 moveq pc,lr @ be binary compatible with V4, yet 607 bx lr @ interoperable with Thumb ISA:-) 608 .size AES_set_encrypt_key,.-AES_set_encrypt_key 609 610 .global AES_set_decrypt_key 611 .type AES_set_decrypt_key,%function 612 .align 5 613 AES_set_decrypt_key: 614 str lr,[sp,#-4]! @ push lr 615 bl AES_set_encrypt_key 616 teq r0,#0 617 ldrne lr,[sp],#4 @ pop lr 618 bne .Labrt 619 620 stmdb sp!,{r4-r12} 621 622 ldr $rounds,[r2,#240] @ AES_set_encrypt_key preserves r2, 623 mov $key,r2 @ which is AES_KEY *key 624 mov $i1,r2 625 add $i2,r2,$rounds,lsl#4 626 627 .Linv: ldr $s0,[$i1] 628 ldr $s1,[$i1,#4] 629 ldr $s2,[$i1,#8] 630 ldr $s3,[$i1,#12] 631 ldr $t1,[$i2] 632 ldr $t2,[$i2,#4] 633 ldr $t3,[$i2,#8] 634 ldr $i3,[$i2,#12] 635 str $s0,[$i2],#-16 636 str $s1,[$i2,#16+4] 637 str $s2,[$i2,#16+8] 638 str $s3,[$i2,#16+12] 639 str $t1,[$i1],#16 640 str $t2,[$i1,#-12] 641 str $t3,[$i1,#-8] 642 str $i3,[$i1,#-4] 643 teq $i1,$i2 644 bne .Linv 645 ___ 646 $mask80=$i1; 647 $mask1b=$i2; 648 $mask7f=$i3; 649 $code.=<<___; 650 ldr $s0,[$key,#16]! @ prefetch tp1 651 mov $mask80,#0x80 652 mov $mask1b,#0x1b 653 orr $mask80,$mask80,#0x8000 654 orr $mask1b,$mask1b,#0x1b00 655 orr $mask80,$mask80,$mask80,lsl#16 656 orr $mask1b,$mask1b,$mask1b,lsl#16 657 sub $rounds,$rounds,#1 658 mvn $mask7f,$mask80 659 mov $rounds,$rounds,lsl#2 @ (rounds-1)*4 660 661 .Lmix: and $t1,$s0,$mask80 662 and $s1,$s0,$mask7f 663 sub $t1,$t1,$t1,lsr#7 664 and $t1,$t1,$mask1b 665 eor $s1,$t1,$s1,lsl#1 @ tp2 666 667 and $t1,$s1,$mask80 668 and $s2,$s1,$mask7f 669 sub $t1,$t1,$t1,lsr#7 670 and $t1,$t1,$mask1b 671 eor $s2,$t1,$s2,lsl#1 @ tp4 672 673 and $t1,$s2,$mask80 674 and $s3,$s2,$mask7f 675 sub $t1,$t1,$t1,lsr#7 676 and $t1,$t1,$mask1b 677 eor $s3,$t1,$s3,lsl#1 @ tp8 678 679 eor $t1,$s1,$s2 680 eor $t2,$s0,$s3 @ tp9 681 eor $t1,$t1,$s3 @ tpe 682 eor $t1,$t1,$s1,ror#24 683 eor $t1,$t1,$t2,ror#24 @ ^= ROTATE(tpb=tp9^tp2,8) 684 eor $t1,$t1,$s2,ror#16 685 eor $t1,$t1,$t2,ror#16 @ ^= ROTATE(tpd=tp9^tp4,16) 686 eor $t1,$t1,$t2,ror#8 @ ^= ROTATE(tp9,24) 687 688 ldr $s0,[$key,#4] @ prefetch tp1 689 str $t1,[$key],#4 690 subs $rounds,$rounds,#1 691 bne .Lmix 692 693 mov r0,#0 694 ldmia sp!,{r4-r12,lr} 695 tst lr,#1 696 moveq pc,lr @ be binary compatible with V4, yet 697 bx lr @ interoperable with Thumb ISA:-) 698 .size AES_set_decrypt_key,.-AES_set_decrypt_key 699 700 .type AES_Td,%object 701 .align 5 702 AES_Td: 703 .word 0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96 704 .word 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393 705 .word 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25 706 .word 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f 707 .word 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1 708 .word 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6 709 .word 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da 710 .word 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844 711 .word 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd 712 .word 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4 713 .word 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45 714 .word 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94 715 .word 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7 716 .word 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a 717 .word 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5 718 .word 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c 719 .word 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1 720 .word 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a 721 .word 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75 722 .word 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051 723 .word 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46 724 .word 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff 725 .word 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77 726 .word 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb 727 .word 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000 728 .word 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e 729 .word 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927 730 .word 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a 731 .word 0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e 732 .word 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16 733 .word 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d 734 .word 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8 735 .word 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd 736 .word 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34 737 .word 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163 738 .word 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120 739 .word 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d 740 .word 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0 741 .word 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422 742 .word 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef 743 .word 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36 744 .word 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4 745 .word 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662 746 .word 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5 747 .word 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3 748 .word 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b 749 .word 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8 750 .word 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6 751 .word 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6 752 .word 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0 753 .word 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815 754 .word 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f 755 .word 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df 756 .word 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f 757 .word 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e 758 .word 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713 759 .word 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89 760 .word 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c 761 .word 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf 762 .word 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86 763 .word 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f 764 .word 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541 765 .word 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190 766 .word 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742 767 @ Td4[256] 768 .byte 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38 769 .byte 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb 770 .byte 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87 771 .byte 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb 772 .byte 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d 773 .byte 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e 774 .byte 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2 775 .byte 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25 776 .byte 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16 777 .byte 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92 778 .byte 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda 779 .byte 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84 780 .byte 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a 781 .byte 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06 782 .byte 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02 783 .byte 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b 784 .byte 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea 785 .byte 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73 786 .byte 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85 787 .byte 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e 788 .byte 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89 789 .byte 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b 790 .byte 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20 791 .byte 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4 792 .byte 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31 793 .byte 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f 794 .byte 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d 795 .byte 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef 796 .byte 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0 797 .byte 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61 798 .byte 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26 799 .byte 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d 800 .size AES_Td,.-AES_Td 801 802 @ void AES_decrypt(const unsigned char *in, unsigned char *out, 803 @ const AES_KEY *key) { 804 .global AES_decrypt 805 .type AES_decrypt,%function 806 .align 5 807 AES_decrypt: 808 sub r3,pc,#8 @ AES_decrypt 809 stmdb sp!,{r1,r4-r12,lr} 810 mov $rounds,r0 @ inp 811 mov $key,r2 812 sub $tbl,r3,#AES_decrypt-AES_Td @ Td 813 814 ldrb $s0,[$rounds,#3] @ load input data in endian-neutral 815 ldrb $t1,[$rounds,#2] @ manner... 816 ldrb $t2,[$rounds,#1] 817 ldrb $t3,[$rounds,#0] 818 orr $s0,$s0,$t1,lsl#8 819 orr $s0,$s0,$t2,lsl#16 820 orr $s0,$s0,$t3,lsl#24 821 ldrb $s1,[$rounds,#7] 822 ldrb $t1,[$rounds,#6] 823 ldrb $t2,[$rounds,#5] 824 ldrb $t3,[$rounds,#4] 825 orr $s1,$s1,$t1,lsl#8 826 orr $s1,$s1,$t2,lsl#16 827 orr $s1,$s1,$t3,lsl#24 828 ldrb $s2,[$rounds,#11] 829 ldrb $t1,[$rounds,#10] 830 ldrb $t2,[$rounds,#9] 831 ldrb $t3,[$rounds,#8] 832 orr $s2,$s2,$t1,lsl#8 833 orr $s2,$s2,$t2,lsl#16 834 orr $s2,$s2,$t3,lsl#24 835 ldrb $s3,[$rounds,#15] 836 ldrb $t1,[$rounds,#14] 837 ldrb $t2,[$rounds,#13] 838 ldrb $t3,[$rounds,#12] 839 orr $s3,$s3,$t1,lsl#8 840 orr $s3,$s3,$t2,lsl#16 841 orr $s3,$s3,$t3,lsl#24 842 843 bl _armv4_AES_decrypt 844 845 ldr $rounds,[sp],#4 @ pop out 846 mov $t1,$s0,lsr#24 @ write output in endian-neutral 847 mov $t2,$s0,lsr#16 @ manner... 848 mov $t3,$s0,lsr#8 849 strb $t1,[$rounds,#0] 850 strb $t2,[$rounds,#1] 851 strb $t3,[$rounds,#2] 852 strb $s0,[$rounds,#3] 853 mov $t1,$s1,lsr#24 854 mov $t2,$s1,lsr#16 855 mov $t3,$s1,lsr#8 856 strb $t1,[$rounds,#4] 857 strb $t2,[$rounds,#5] 858 strb $t3,[$rounds,#6] 859 strb $s1,[$rounds,#7] 860 mov $t1,$s2,lsr#24 861 mov $t2,$s2,lsr#16 862 mov $t3,$s2,lsr#8 863 strb $t1,[$rounds,#8] 864 strb $t2,[$rounds,#9] 865 strb $t3,[$rounds,#10] 866 strb $s2,[$rounds,#11] 867 mov $t1,$s3,lsr#24 868 mov $t2,$s3,lsr#16 869 mov $t3,$s3,lsr#8 870 strb $t1,[$rounds,#12] 871 strb $t2,[$rounds,#13] 872 strb $t3,[$rounds,#14] 873 strb $s3,[$rounds,#15] 874 875 ldmia sp!,{r4-r12,lr} 876 tst lr,#1 877 moveq pc,lr @ be binary compatible with V4, yet 878 bx lr @ interoperable with Thumb ISA:-) 879 .size AES_decrypt,.-AES_decrypt 880 881 .type _armv4_AES_decrypt,%function 882 .align 2 883 _armv4_AES_decrypt: 884 str lr,[sp,#-4]! @ push lr 885 ldr $t1,[$key],#16 886 ldr $t2,[$key,#-12] 887 ldr $t3,[$key,#-8] 888 ldr $i1,[$key,#-4] 889 ldr $rounds,[$key,#240-16] 890 eor $s0,$s0,$t1 891 eor $s1,$s1,$t2 892 eor $s2,$s2,$t3 893 eor $s3,$s3,$i1 894 sub $rounds,$rounds,#1 895 mov lr,#255 896 897 .Ldec_loop: 898 and $i1,lr,$s0,lsr#16 899 and $i2,lr,$s0,lsr#8 900 and $i3,lr,$s0 901 mov $s0,$s0,lsr#24 902 ldr $t1,[$tbl,$i1,lsl#2] @ Td1[s0>>16] 903 ldr $s0,[$tbl,$s0,lsl#2] @ Td0[s0>>24] 904 ldr $t2,[$tbl,$i2,lsl#2] @ Td2[s0>>8] 905 ldr $t3,[$tbl,$i3,lsl#2] @ Td3[s0>>0] 906 907 and $i1,lr,$s1 @ i0 908 and $i2,lr,$s1,lsr#16 909 and $i3,lr,$s1,lsr#8 910 mov $s1,$s1,lsr#24 911 ldr $i1,[$tbl,$i1,lsl#2] @ Td3[s1>>0] 912 ldr $s1,[$tbl,$s1,lsl#2] @ Td0[s1>>24] 913 ldr $i2,[$tbl,$i2,lsl#2] @ Td1[s1>>16] 914 ldr $i3,[$tbl,$i3,lsl#2] @ Td2[s1>>8] 915 eor $s0,$s0,$i1,ror#24 916 eor $s1,$s1,$t1,ror#8 917 eor $t2,$i2,$t2,ror#8 918 eor $t3,$i3,$t3,ror#8 919 920 and $i1,lr,$s2,lsr#8 @ i0 921 and $i2,lr,$s2 @ i1 922 and $i3,lr,$s2,lsr#16 923 mov $s2,$s2,lsr#24 924 ldr $i1,[$tbl,$i1,lsl#2] @ Td2[s2>>8] 925 ldr $i2,[$tbl,$i2,lsl#2] @ Td3[s2>>0] 926 ldr $s2,[$tbl,$s2,lsl#2] @ Td0[s2>>24] 927 ldr $i3,[$tbl,$i3,lsl#2] @ Td1[s2>>16] 928 eor $s0,$s0,$i1,ror#16 929 eor $s1,$s1,$i2,ror#24 930 eor $s2,$s2,$t2,ror#8 931 eor $t3,$i3,$t3,ror#8 932 933 and $i1,lr,$s3,lsr#16 @ i0 934 and $i2,lr,$s3,lsr#8 @ i1 935 and $i3,lr,$s3 @ i2 936 mov $s3,$s3,lsr#24 937 ldr $i1,[$tbl,$i1,lsl#2] @ Td1[s3>>16] 938 ldr $i2,[$tbl,$i2,lsl#2] @ Td2[s3>>8] 939 ldr $i3,[$tbl,$i3,lsl#2] @ Td3[s3>>0] 940 ldr $s3,[$tbl,$s3,lsl#2] @ Td0[s3>>24] 941 eor $s0,$s0,$i1,ror#8 942 eor $s1,$s1,$i2,ror#16 943 eor $s2,$s2,$i3,ror#24 944 eor $s3,$s3,$t3,ror#8 945 946 ldr $t1,[$key],#16 947 ldr $t2,[$key,#-12] 948 ldr $t3,[$key,#-8] 949 ldr $i1,[$key,#-4] 950 eor $s0,$s0,$t1 951 eor $s1,$s1,$t2 952 eor $s2,$s2,$t3 953 eor $s3,$s3,$i1 954 955 subs $rounds,$rounds,#1 956 bne .Ldec_loop 957 958 add $tbl,$tbl,#1024 959 960 ldr $t1,[$tbl,#0] @ prefetch Td4 961 ldr $t2,[$tbl,#32] 962 ldr $t3,[$tbl,#64] 963 ldr $i1,[$tbl,#96] 964 ldr $i2,[$tbl,#128] 965 ldr $i3,[$tbl,#160] 966 ldr $t1,[$tbl,#192] 967 ldr $t2,[$tbl,#224] 968 969 and $i1,lr,$s0,lsr#16 970 and $i2,lr,$s0,lsr#8 971 and $i3,lr,$s0 972 ldrb $s0,[$tbl,$s0,lsr#24] @ Td4[s0>>24] 973 ldrb $t1,[$tbl,$i1] @ Td4[s0>>16] 974 ldrb $t2,[$tbl,$i2] @ Td4[s0>>8] 975 ldrb $t3,[$tbl,$i3] @ Td4[s0>>0] 976 977 and $i1,lr,$s1 @ i0 978 and $i2,lr,$s1,lsr#16 979 and $i3,lr,$s1,lsr#8 980 ldrb $i1,[$tbl,$i1] @ Td4[s1>>0] 981 ldrb $s1,[$tbl,$s1,lsr#24] @ Td4[s1>>24] 982 ldrb $i2,[$tbl,$i2] @ Td4[s1>>16] 983 ldrb $i3,[$tbl,$i3] @ Td4[s1>>8] 984 eor $s0,$i1,$s0,lsl#24 985 eor $s1,$t1,$s1,lsl#8 986 eor $t2,$t2,$i2,lsl#8 987 eor $t3,$t3,$i3,lsl#8 988 989 and $i1,lr,$s2,lsr#8 @ i0 990 and $i2,lr,$s2 @ i1 991 and $i3,lr,$s2,lsr#16 992 ldrb $i1,[$tbl,$i1] @ Td4[s2>>8] 993 ldrb $i2,[$tbl,$i2] @ Td4[s2>>0] 994 ldrb $s2,[$tbl,$s2,lsr#24] @ Td4[s2>>24] 995 ldrb $i3,[$tbl,$i3] @ Td4[s2>>16] 996 eor $s0,$s0,$i1,lsl#8 997 eor $s1,$i2,$s1,lsl#16 998 eor $s2,$t2,$s2,lsl#16 999 eor $t3,$t3,$i3,lsl#16 1000 1001 and $i1,lr,$s3,lsr#16 @ i0 1002 and $i2,lr,$s3,lsr#8 @ i1 1003 and $i3,lr,$s3 @ i2 1004 ldrb $i1,[$tbl,$i1] @ Td4[s3>>16] 1005 ldrb $i2,[$tbl,$i2] @ Td4[s3>>8] 1006 ldrb $i3,[$tbl,$i3] @ Td4[s3>>0] 1007 ldrb $s3,[$tbl,$s3,lsr#24] @ Td4[s3>>24] 1008 eor $s0,$s0,$i1,lsl#16 1009 eor $s1,$s1,$i2,lsl#8 1010 eor $s2,$i3,$s2,lsl#8 1011 eor $s3,$t3,$s3,lsl#24 1012 1013 ldr lr,[sp],#4 @ pop lr 1014 ldr $t1,[$key,#0] 1015 ldr $t2,[$key,#4] 1016 ldr $t3,[$key,#8] 1017 ldr $i1,[$key,#12] 1018 eor $s0,$s0,$t1 1019 eor $s1,$s1,$t2 1020 eor $s2,$s2,$t3 1021 eor $s3,$s3,$i1 1022 1023 sub $tbl,$tbl,#1024 1024 mov pc,lr @ return 1025 .size _armv4_AES_decrypt,.-_armv4_AES_decrypt 1026 .asciz "AES for ARMv4, CRYPTOGAMS by <appro\@openssl.org>" 1027 .align 2 1028 ___ 1029 1030 $code =~ s/\bbx\s+lr\b/.word\t0xe12fff1e/gm; # make it possible to compile with -march=armv4 1031 print $code; 1032
