new file mode 100644
@@ -0,0 +1,630 @@
+/*
+ * AES modes (ECB/CBC/CTR/XTS) for PPC AES implementation
+ *
+ * Copyright (c) 2015 Markus Stockhausen <stockhausen@collogia.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 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+
+#include <asm/ppc_asm.h>
+#include "aes-spe-regs.h"
+
+#ifdef __BIG_ENDIAN__ /* Macros for big endian builds */
+
+#define LOAD_DATA(reg, off) \
+ lwz reg,off(rSP); /* load with offset */
+#define SAVE_DATA(reg, off) \
+ stw reg,off(rDP); /* save with offset */
+#define NEXT_BLOCK \
+ addi rSP,rSP,16; /* increment pointers per bloc */ \
+ addi rDP,rDP,16;
+#define LOAD_IV(reg, off) \
+ lwz reg,off(rIP); /* IV loading with offset */
+#define SAVE_IV(reg, off) \
+ stw reg,off(rIP); /* IV saving with offset */
+#define START_IV /* nothing to reset */
+#define CBC_DEC 16 /* CBC decrement per block */
+#define CTR_DEC 1 /* CTR decrement one byte */
+
+#else /* Macros for little endian */
+
+#define LOAD_DATA(reg, off) \
+ lwbrx reg,0,rSP; /* load reversed */ \
+ addi rSP,rSP,4; /* and increment pointer */
+#define SAVE_DATA(reg, off) \
+ stwbrx reg,0,rDP; /* save reversed */ \
+ addi rDP,rDP,4; /* and increment pointer */
+#define NEXT_BLOCK /* nothing todo */
+#define LOAD_IV(reg, off) \
+ lwbrx reg,0,rIP; /* load reversed */ \
+ addi rIP,rIP,4; /* and increment pointer */
+#define SAVE_IV(reg, off) \
+ stwbrx reg,0,rIP; /* load reversed */ \
+ addi rIP,rIP,4; /* and increment pointer */
+#define START_IV \
+ subi rIP,rIP,16; /* must reset pointer */
+#define CBC_DEC 32 /* 2 blocks because of incs */
+#define CTR_DEC 17 /* 1 block because of incs */
+
+#endif
+
+#define SAVE_0_REGS
+#define LOAD_0_REGS
+
+#define SAVE_4_REGS \
+ stw rI0,96(r1); /* save 32 bit registers */ \
+ stw rI1,100(r1); \
+ stw rI2,104(r1); \
+ stw rI3,108(r1);
+
+#define LOAD_4_REGS \
+ lwz rI0,96(r1); /* restore 32 bit registers */ \
+ lwz rI1,100(r1); \
+ lwz rI2,104(r1); \
+ lwz rI3,108(r1);
+
+#define SAVE_8_REGS \
+ SAVE_4_REGS \
+ stw rG0,112(r1); /* save 32 bit registers */ \
+ stw rG1,116(r1); \
+ stw rG2,120(r1); \
+ stw rG3,124(r1);
+
+#define LOAD_8_REGS \
+ LOAD_4_REGS \
+ lwz rG0,112(r1); /* restore 32 bit registers */ \
+ lwz rG1,116(r1); \
+ lwz rG2,120(r1); \
+ lwz rG3,124(r1);
+
+#define INITIALIZE_CRYPT(tab,nr32bitregs) \
+ mflr r0; \
+ stwu r1,-160(r1); /* create stack frame */ \
+ lis rT0,tab@h; /* en-/decryption table pointer */ \
+ stw r0,8(r1); /* save link register */ \
+ ori rT0,rT0,tab@l; \
+ evstdw r14,16(r1); \
+ mr rKS,rKP; \
+ evstdw r15,24(r1); /* We must save non volatile */ \
+ evstdw r16,32(r1); /* registers. Take the chance */ \
+ evstdw r17,40(r1); /* and save the SPE part too */ \
+ evstdw r18,48(r1); \
+ evstdw r19,56(r1); \
+ evstdw r20,64(r1); \
+ evstdw r21,72(r1); \
+ evstdw r22,80(r1); \
+ evstdw r23,88(r1); \
+ SAVE_##nr32bitregs##_REGS
+
+#define FINALIZE_CRYPT(nr32bitregs) \
+ lwz r0,8(r1); \
+ evldw r14,16(r1); /* restore SPE registers */ \
+ evldw r15,24(r1); \
+ evldw r16,32(r1); \
+ evldw r17,40(r1); \
+ evldw r18,48(r1); \
+ evldw r19,56(r1); \
+ evldw r20,64(r1); \
+ evldw r21,72(r1); \
+ evldw r22,80(r1); \
+ evldw r23,88(r1); \
+ LOAD_##nr32bitregs##_REGS \
+ mtlr r0; /* restore link register */ \
+ xor r0,r0,r0; \
+ stw r0,16(r1); /* delete sensitive data */ \
+ stw r0,24(r1); /* that we might have pushed */ \
+ stw r0,32(r1); /* from other context that runs */ \
+ stw r0,40(r1); /* the same code */ \
+ stw r0,48(r1); \
+ stw r0,56(r1); \
+ stw r0,64(r1); \
+ stw r0,72(r1); \
+ stw r0,80(r1); \
+ stw r0,88(r1); \
+ addi r1,r1,160; /* cleanup stack frame */
+
+#define ENDIAN_SWAP(t0, t1, s0, s1) \
+ rotrwi t0,s0,8; /* swap endianness for 2 GPRs */ \
+ rotrwi t1,s1,8; \
+ rlwimi t0,s0,8,8,15; \
+ rlwimi t1,s1,8,8,15; \
+ rlwimi t0,s0,8,24,31; \
+ rlwimi t1,s1,8,24,31;
+
+#define GF128_MUL(d0, d1, d2, d3, t0) \
+ li t0,0x87; /* multiplication in GF128 */ \
+ cmpwi d3,-1; \
+ iselgt t0,0,t0; \
+ rlwimi d3,d2,0,0,0; /* propagate "carry" bits */ \
+ rotlwi d3,d3,1; \
+ rlwimi d2,d1,0,0,0; \
+ rotlwi d2,d2,1; \
+ rlwimi d1,d0,0,0,0; \
+ slwi d0,d0,1; /* shift left 128 bit */ \
+ rotlwi d1,d1,1; \
+ xor d0,d0,t0;
+
+#define START_KEY(d0, d1, d2, d3) \
+ lwz rW0,0(rKP); \
+ mtctr rRR; \
+ lwz rW1,4(rKP); \
+ lwz rW2,8(rKP); \
+ lwz rW3,12(rKP); \
+ xor rD0,d0,rW0; \
+ xor rD1,d1,rW1; \
+ xor rD2,d2,rW2; \
+ xor rD3,d3,rW3;
+
+/*
+ * ppc_encrypt_aes(u8 *out, const u8 *in, u32 *key_enc,
+ * u32 rounds)
+ *
+ * called from glue layer to encrypt a single 16 byte block
+ * round values are AES128 = 4, AES192 = 5, AES256 = 6
+ *
+ */
+_GLOBAL(ppc_encrypt_aes)
+ INITIALIZE_CRYPT(PPC_AES_4K_ENCTAB, 0)
+ LOAD_DATA(rD0, 0)
+ LOAD_DATA(rD1, 4)
+ LOAD_DATA(rD2, 8)
+ LOAD_DATA(rD3, 12)
+ START_KEY(rD0, rD1, rD2, rD3)
+ bl ppc_encrypt_block
+ xor rD0,rD0,rW0
+ SAVE_DATA(rD0, 0)
+ xor rD1,rD1,rW1
+ SAVE_DATA(rD1, 4)
+ xor rD2,rD2,rW2
+ SAVE_DATA(rD2, 8)
+ xor rD3,rD3,rW3
+ SAVE_DATA(rD3, 12)
+ FINALIZE_CRYPT(0)
+ blr
+
+/*
+ * ppc_decrypt_aes(u8 *out, const u8 *in, u32 *key_dec,
+ * u32 rounds)
+ *
+ * called from glue layer to decrypt a single 16 byte block
+ * round values are AES128 = 4, AES192 = 5, AES256 = 6
+ *
+ */
+_GLOBAL(ppc_decrypt_aes)
+ INITIALIZE_CRYPT(PPC_AES_4K_DECTAB,0)
+ LOAD_DATA(rD0, 0)
+ addi rT1,rT0,4096
+ LOAD_DATA(rD1, 4)
+ LOAD_DATA(rD2, 8)
+ LOAD_DATA(rD3, 12)
+ START_KEY(rD0, rD1, rD2, rD3)
+ bl ppc_decrypt_block
+ xor rD0,rD0,rW0
+ SAVE_DATA(rD0, 0)
+ xor rD1,rD1,rW1
+ SAVE_DATA(rD1, 4)
+ xor rD2,rD2,rW2
+ SAVE_DATA(rD2, 8)
+ xor rD3,rD3,rW3
+ SAVE_DATA(rD3, 12)
+ FINALIZE_CRYPT(0)
+ blr
+
+/*
+ * ppc_encrypt_ecb(u8 *out, const u8 *in, u32 *key_enc,
+ * u32 rounds, u32 bytes);
+ *
+ * called from glue layer to encrypt multiple blocks via ECB
+ * Bytes must be larger or equal 16 and only whole blocks are
+ * processed. round values are AES128 = 4, AES192 = 5 and
+ * AES256 = 6
+ *
+ */
+_GLOBAL(ppc_encrypt_ecb)
+ INITIALIZE_CRYPT(PPC_AES_4K_ENCTAB, 0)
+ppc_encrypt_ecb_loop:
+ LOAD_DATA(rD0, 0)
+ mr rKP,rKS
+ LOAD_DATA(rD1, 4)
+ subi rLN,rLN,16
+ LOAD_DATA(rD2, 8)
+ cmpwi rLN,15
+ LOAD_DATA(rD3, 12)
+ START_KEY(rD0, rD1, rD2, rD3)
+ bl ppc_encrypt_block
+ xor rD0,rD0,rW0
+ SAVE_DATA(rD0, 0)
+ xor rD1,rD1,rW1
+ SAVE_DATA(rD1, 4)
+ xor rD2,rD2,rW2
+ SAVE_DATA(rD2, 8)
+ xor rD3,rD3,rW3
+ SAVE_DATA(rD3, 12)
+ NEXT_BLOCK
+ bt gt,ppc_encrypt_ecb_loop
+ FINALIZE_CRYPT(0)
+ blr
+
+/*
+ * ppc_decrypt_ecb(u8 *out, const u8 *in, u32 *key_dec,
+ * u32 rounds, u32 bytes);
+ *
+ * called from glue layer to decrypt multiple blocks via ECB
+ * Bytes must be larger or equal 16 and only whole blocks are
+ * processed. round values are AES128 = 4, AES192 = 5 and
+ * AES256 = 6
+ *
+ */
+_GLOBAL(ppc_decrypt_ecb)
+ INITIALIZE_CRYPT(PPC_AES_4K_DECTAB, 0)
+ addi rT1,rT0,4096
+ppc_decrypt_ecb_loop:
+ LOAD_DATA(rD0, 0)
+ mr rKP,rKS
+ LOAD_DATA(rD1, 4)
+ subi rLN,rLN,16
+ LOAD_DATA(rD2, 8)
+ cmpwi rLN,15
+ LOAD_DATA(rD3, 12)
+ START_KEY(rD0, rD1, rD2, rD3)
+ bl ppc_decrypt_block
+ xor rD0,rD0,rW0
+ SAVE_DATA(rD0, 0)
+ xor rD1,rD1,rW1
+ SAVE_DATA(rD1, 4)
+ xor rD2,rD2,rW2
+ SAVE_DATA(rD2, 8)
+ xor rD3,rD3,rW3
+ SAVE_DATA(rD3, 12)
+ NEXT_BLOCK
+ bt gt,ppc_decrypt_ecb_loop
+ FINALIZE_CRYPT(0)
+ blr
+
+/*
+ * ppc_encrypt_cbc(u8 *out, const u8 *in, u32 *key_enc,
+ * 32 rounds, u32 bytes, u8 *iv);
+ *
+ * called from glue layer to encrypt multiple blocks via CBC
+ * Bytes must be larger or equal 16 and only whole blocks are
+ * processed. round values are AES128 = 4, AES192 = 5 and
+ * AES256 = 6
+ *
+ */
+_GLOBAL(ppc_encrypt_cbc)
+ INITIALIZE_CRYPT(PPC_AES_4K_ENCTAB, 4)
+ LOAD_IV(rI0, 0)
+ LOAD_IV(rI1, 4)
+ LOAD_IV(rI2, 8)
+ LOAD_IV(rI3, 12)
+ppc_encrypt_cbc_loop:
+ LOAD_DATA(rD0, 0)
+ mr rKP,rKS
+ LOAD_DATA(rD1, 4)
+ subi rLN,rLN,16
+ LOAD_DATA(rD2, 8)
+ cmpwi rLN,15
+ LOAD_DATA(rD3, 12)
+ xor rD0,rD0,rI0
+ xor rD1,rD1,rI1
+ xor rD2,rD2,rI2
+ xor rD3,rD3,rI3
+ START_KEY(rD0, rD1, rD2, rD3)
+ bl ppc_encrypt_block
+ xor rI0,rD0,rW0
+ SAVE_DATA(rI0, 0)
+ xor rI1,rD1,rW1
+ SAVE_DATA(rI1, 4)
+ xor rI2,rD2,rW2
+ SAVE_DATA(rI2, 8)
+ xor rI3,rD3,rW3
+ SAVE_DATA(rI3, 12)
+ NEXT_BLOCK
+ bt gt,ppc_encrypt_cbc_loop
+ START_IV
+ SAVE_IV(rI0, 0)
+ SAVE_IV(rI1, 4)
+ SAVE_IV(rI2, 8)
+ SAVE_IV(rI3, 12)
+ FINALIZE_CRYPT(4)
+ blr
+
+/*
+ * ppc_decrypt_cbc(u8 *out, const u8 *in, u32 *key_dec,
+ * u32 rounds, u32 bytes, u8 *iv);
+ *
+ * called from glue layer to decrypt multiple blocks via CBC
+ * round values are AES128 = 4, AES192 = 5, AES256 = 6
+ *
+ */
+_GLOBAL(ppc_decrypt_cbc)
+ INITIALIZE_CRYPT(PPC_AES_4K_DECTAB, 4)
+ li rT1,15
+ LOAD_IV(rI0, 0)
+ andc rLN,rLN,rT1
+ LOAD_IV(rI1, 4)
+ subi rLN,rLN,16
+ LOAD_IV(rI2, 8)
+ add rSP,rSP,rLN /* reverse processing */
+ LOAD_IV(rI3, 12)
+ add rDP,rDP,rLN
+ LOAD_DATA(rD0, 0)
+ addi rT1,rT0,4096
+ LOAD_DATA(rD1, 4)
+ LOAD_DATA(rD2, 8)
+ LOAD_DATA(rD3, 12)
+ START_IV
+ SAVE_IV(rD0, 0)
+ SAVE_IV(rD1, 4)
+ SAVE_IV(rD2, 8)
+ cmpwi rLN,16
+ SAVE_IV(rD3, 12)
+ bt lt,ppc_decrypt_cbc_end
+ppc_decrypt_cbc_loop:
+ mr rKP,rKS
+ START_KEY(rD0, rD1, rD2, rD3)
+ bl ppc_decrypt_block
+ subi rLN,rLN,16
+ subi rSP,rSP,CBC_DEC
+ xor rW0,rD0,rW0
+ LOAD_DATA(rD0, 0)
+ xor rW1,rD1,rW1
+ LOAD_DATA(rD1, 4)
+ xor rW2,rD2,rW2
+ LOAD_DATA(rD2, 8)
+ xor rW3,rD3,rW3
+ LOAD_DATA(rD3, 12)
+ xor rW0,rW0,rD0
+ SAVE_DATA(rW0, 0)
+ xor rW1,rW1,rD1
+ SAVE_DATA(rW1, 4)
+ xor rW2,rW2,rD2
+ SAVE_DATA(rW2, 8)
+ xor rW3,rW3,rD3
+ SAVE_DATA(rW3, 12)
+ cmpwi rLN,15
+ subi rDP,rDP,CBC_DEC
+ bt gt,ppc_decrypt_cbc_loop
+ppc_decrypt_cbc_end:
+ mr rKP,rKS
+ START_KEY(rD0, rD1, rD2, rD3)
+ bl ppc_decrypt_block
+ xor rW0,rW0,rD0
+ xor rW1,rW1,rD1
+ xor rW2,rW2,rD2
+ xor rW3,rW3,rD3
+ xor rW0,rW0,rI0 /* decrypt with initial IV */
+ SAVE_DATA(rW0, 0)
+ xor rW1,rW1,rI1
+ SAVE_DATA(rW1, 4)
+ xor rW2,rW2,rI2
+ SAVE_DATA(rW2, 8)
+ xor rW3,rW3,rI3
+ SAVE_DATA(rW3, 12)
+ FINALIZE_CRYPT(4)
+ blr
+
+/*
+ * ppc_crypt_ctr(u8 *out, const u8 *in, u32 *key_enc,
+ * u32 rounds, u32 bytes, u8 *iv);
+ *
+ * called from glue layer to encrypt/decrypt multiple blocks
+ * via CTR. Number of bytes does not need to be a multiple of
+ * 16. Round values are AES128 = 4, AES192 = 5, AES256 = 6
+ *
+ */
+_GLOBAL(ppc_crypt_ctr)
+ INITIALIZE_CRYPT(PPC_AES_4K_ENCTAB, 4)
+ LOAD_IV(rI0, 0)
+ LOAD_IV(rI1, 4)
+ LOAD_IV(rI2, 8)
+ cmpwi rLN,16
+ LOAD_IV(rI3, 12)
+ START_IV
+ bt lt,ppc_crypt_ctr_partial
+ppc_crypt_ctr_loop:
+ mr rKP,rKS
+ START_KEY(rI0, rI1, rI2, rI3)
+ bl ppc_encrypt_block
+ xor rW0,rD0,rW0
+ xor rW1,rD1,rW1
+ xor rW2,rD2,rW2
+ xor rW3,rD3,rW3
+ LOAD_DATA(rD0, 0)
+ subi rLN,rLN,16
+ LOAD_DATA(rD1, 4)
+ LOAD_DATA(rD2, 8)
+ LOAD_DATA(rD3, 12)
+ xor rD0,rD0,rW0
+ SAVE_DATA(rD0, 0)
+ xor rD1,rD1,rW1
+ SAVE_DATA(rD1, 4)
+ xor rD2,rD2,rW2
+ SAVE_DATA(rD2, 8)
+ xor rD3,rD3,rW3
+ SAVE_DATA(rD3, 12)
+ addic rI3,rI3,1 /* increase counter */
+ addze rI2,rI2
+ addze rI1,rI1
+ addze rI0,rI0
+ NEXT_BLOCK
+ cmpwi rLN,15
+ bt gt,ppc_crypt_ctr_loop
+ppc_crypt_ctr_partial:
+ cmpwi rLN,0
+ bt eq,ppc_crypt_ctr_end
+ mr rKP,rKS
+ START_KEY(rI0, rI1, rI2, rI3)
+ bl ppc_encrypt_block
+ xor rW0,rD0,rW0
+ SAVE_IV(rW0, 0)
+ xor rW1,rD1,rW1
+ SAVE_IV(rW1, 4)
+ xor rW2,rD2,rW2
+ SAVE_IV(rW2, 8)
+ xor rW3,rD3,rW3
+ SAVE_IV(rW3, 12)
+ mtctr rLN
+ subi rIP,rIP,CTR_DEC
+ subi rSP,rSP,1
+ subi rDP,rDP,1
+ppc_crypt_ctr_xorbyte:
+ lbzu rW4,1(rIP) /* bytewise xor for partial block */
+ lbzu rW5,1(rSP)
+ xor rW4,rW4,rW5
+ stbu rW4,1(rDP)
+ bdnz ppc_crypt_ctr_xorbyte
+ subf rIP,rLN,rIP
+ addi rIP,rIP,1
+ addic rI3,rI3,1
+ addze rI2,rI2
+ addze rI1,rI1
+ addze rI0,rI0
+ppc_crypt_ctr_end:
+ SAVE_IV(rI0, 0)
+ SAVE_IV(rI1, 4)
+ SAVE_IV(rI2, 8)
+ SAVE_IV(rI3, 12)
+ FINALIZE_CRYPT(4)
+ blr
+
+/*
+ * ppc_encrypt_xts(u8 *out, const u8 *in, u32 *key_enc,
+ * u32 rounds, u32 bytes, u8 *iv, u32 *key_twk);
+ *
+ * called from glue layer to encrypt multiple blocks via XTS
+ * If key_twk is given, the initial IV encryption will be
+ * processed too. Round values are AES128 = 4, AES192 = 5,
+ * AES256 = 6
+ *
+ */
+_GLOBAL(ppc_encrypt_xts)
+ INITIALIZE_CRYPT(PPC_AES_4K_ENCTAB, 8)
+ LOAD_IV(rI0, 0)
+ LOAD_IV(rI1, 4)
+ LOAD_IV(rI2, 8)
+ cmpwi rKT,0
+ LOAD_IV(rI3, 12)
+ bt eq,ppc_encrypt_xts_notweak
+ mr rKP,rKT
+ START_KEY(rI0, rI1, rI2, rI3)
+ bl ppc_encrypt_block
+ xor rI0,rD0,rW0
+ xor rI1,rD1,rW1
+ xor rI2,rD2,rW2
+ xor rI3,rD3,rW3
+ppc_encrypt_xts_notweak:
+ ENDIAN_SWAP(rG0, rG1, rI0, rI1)
+ ENDIAN_SWAP(rG2, rG3, rI2, rI3)
+ppc_encrypt_xts_loop:
+ LOAD_DATA(rD0, 0)
+ mr rKP,rKS
+ LOAD_DATA(rD1, 4)
+ subi rLN,rLN,16
+ LOAD_DATA(rD2, 8)
+ LOAD_DATA(rD3, 12)
+ xor rD0,rD0,rI0
+ xor rD1,rD1,rI1
+ xor rD2,rD2,rI2
+ xor rD3,rD3,rI3
+ START_KEY(rD0, rD1, rD2, rD3)
+ bl ppc_encrypt_block
+ xor rD0,rD0,rW0
+ xor rD1,rD1,rW1
+ xor rD2,rD2,rW2
+ xor rD3,rD3,rW3
+ xor rD0,rD0,rI0
+ SAVE_DATA(rD0, 0)
+ xor rD1,rD1,rI1
+ SAVE_DATA(rD1, 4)
+ xor rD2,rD2,rI2
+ SAVE_DATA(rD2, 8)
+ xor rD3,rD3,rI3
+ SAVE_DATA(rD3, 12)
+ GF128_MUL(rG0, rG1, rG2, rG3, rW0)
+ ENDIAN_SWAP(rI0, rI1, rG0, rG1)
+ ENDIAN_SWAP(rI2, rI3, rG2, rG3)
+ cmpwi rLN,0
+ NEXT_BLOCK
+ bt gt,ppc_encrypt_xts_loop
+ START_IV
+ SAVE_IV(rI0, 0)
+ SAVE_IV(rI1, 4)
+ SAVE_IV(rI2, 8)
+ SAVE_IV(rI3, 12)
+ FINALIZE_CRYPT(8)
+ blr
+
+/*
+ * ppc_decrypt_xts(u8 *out, const u8 *in, u32 *key_dec,
+ * u32 rounds, u32 blocks, u8 *iv, u32 *key_twk);
+ *
+ * called from glue layer to decrypt multiple blocks via XTS
+ * If key_twk is given, the initial IV encryption will be
+ * processed too. Round values are AES128 = 4, AES192 = 5,
+ * AES256 = 6
+ *
+ */
+_GLOBAL(ppc_decrypt_xts)
+ INITIALIZE_CRYPT(PPC_AES_4K_DECTAB, 8)
+ LOAD_IV(rI0, 0)
+ addi rT1,rT0,4096
+ LOAD_IV(rI1, 4)
+ LOAD_IV(rI2, 8)
+ cmpwi rKT,0
+ LOAD_IV(rI3, 12)
+ bt eq,ppc_decrypt_xts_notweak
+ subi rT0,rT0,4096
+ mr rKP,rKT
+ START_KEY(rI0, rI1, rI2, rI3)
+ bl ppc_encrypt_block
+ xor rI0,rD0,rW0
+ xor rI1,rD1,rW1
+ xor rI2,rD2,rW2
+ xor rI3,rD3,rW3
+ addi rT0,rT0,4096
+ppc_decrypt_xts_notweak:
+ ENDIAN_SWAP(rG0, rG1, rI0, rI1)
+ ENDIAN_SWAP(rG2, rG3, rI2, rI3)
+ppc_decrypt_xts_loop:
+ LOAD_DATA(rD0, 0)
+ mr rKP,rKS
+ LOAD_DATA(rD1, 4)
+ subi rLN,rLN,16
+ LOAD_DATA(rD2, 8)
+ LOAD_DATA(rD3, 12)
+ xor rD0,rD0,rI0
+ xor rD1,rD1,rI1
+ xor rD2,rD2,rI2
+ xor rD3,rD3,rI3
+ START_KEY(rD0, rD1, rD2, rD3)
+ bl ppc_decrypt_block
+ xor rD0,rD0,rW0
+ xor rD1,rD1,rW1
+ xor rD2,rD2,rW2
+ xor rD3,rD3,rW3
+ xor rD0,rD0,rI0
+ SAVE_DATA(rD0, 0)
+ xor rD1,rD1,rI1
+ SAVE_DATA(rD1, 4)
+ xor rD2,rD2,rI2
+ SAVE_DATA(rD2, 8)
+ xor rD3,rD3,rI3
+ SAVE_DATA(rD3, 12)
+ GF128_MUL(rG0, rG1, rG2, rG3, rW0)
+ ENDIAN_SWAP(rI0, rI1, rG0, rG1)
+ ENDIAN_SWAP(rI2, rI3, rG2, rG3)
+ cmpwi rLN,0
+ NEXT_BLOCK
+ bt gt,ppc_decrypt_xts_loop
+ START_IV
+ SAVE_IV(rI0, 0)
+ SAVE_IV(rI1, 4)
+ SAVE_IV(rI2, 8)
+ SAVE_IV(rI3, 12)
+ FINALIZE_CRYPT(8)
+ blr
[PATCH v1 5/7] AES for PPC/SPE - ECB/CBC/CTR/XTS modes The assembler block cipher module that controls the core AES functions. Signed-off-by: Markus Stockhausen <stockhausen@collogia.de> **************************************************************************** Diese E-Mail enthält vertrauliche und/oder rechtlich geschützte Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese Mail. Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser Mail ist nicht gestattet. Über das Internet versandte E-Mails können unter fremden Namen erstellt oder manipuliert werden. Deshalb ist diese als E-Mail verschickte Nachricht keine rechtsverbindliche Willenserklärung. Collogia Unternehmensberatung AG Ubierring 11 D-50678 Köln Vorstand: Kadir Akin Dr. Michael Höhnerbach Vorsitzender des Aufsichtsrates: Hans Kristian Langva Registergericht: Amtsgericht Köln Registernummer: HRB 52 497 This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden. e-mails sent over the internet may have been written under a wrong name or been manipulated. That is why this message sent as an e-mail is not a legally binding declaration of intention. Collogia Unternehmensberatung AG Ubierring 11 D-50678 Köln executive board: Kadir Akin Dr. Michael Höhnerbach President of the supervisory board: Hans Kristian Langva Registry office: district court Cologne Register number: HRB 52 497 ****************************************************************************