718 lines
16 KiB
C
718 lines
16 KiB
C
/*
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* Copyright (c) 2017 Thomas Pornin <pornin@bolet.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#define BR_POWER_ASM_MACROS 1
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#include "inner.h"
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#if BR_POWER8
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/* see bearssl_block.h */
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void
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br_aes_pwr8_ctr_init(br_aes_pwr8_ctr_keys *ctx,
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const void *key, size_t len)
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{
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ctx->vtable = &br_aes_pwr8_ctr_vtable;
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ctx->num_rounds = br_aes_pwr8_keysched(ctx->skey.skni, key, len);
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}
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static void
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ctr_128(const unsigned char *sk, const unsigned char *ivbuf,
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unsigned char *buf, size_t num_blocks)
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{
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long cc0, cc1, cc2, cc3;
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#if BR_POWER8_LE
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static const uint32_t idx2be[] = {
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0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C
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};
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#endif
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static const uint32_t ctrinc[] = {
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0, 0, 0, 4
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};
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cc0 = 0;
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cc1 = 16;
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cc2 = 32;
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cc3 = 48;
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asm volatile (
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/*
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* Load subkeys into v0..v10
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*/
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lxvw4x(32, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(33, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(34, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(35, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(36, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(37, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(38, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(39, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(40, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(41, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(42, %[cc0], %[sk])
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li(%[cc0], 0)
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#if BR_POWER8_LE
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/*
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* v15 = constant for byteswapping words
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*/
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lxvw4x(47, 0, %[idx2be])
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#endif
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/*
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* v28 = increment for IV counter.
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*/
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lxvw4x(60, 0, %[ctrinc])
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/*
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* Load IV into v16..v19
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*/
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lxvw4x(48, %[cc0], %[ivbuf])
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lxvw4x(49, %[cc1], %[ivbuf])
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lxvw4x(50, %[cc2], %[ivbuf])
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lxvw4x(51, %[cc3], %[ivbuf])
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#if BR_POWER8_LE
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vperm(16, 16, 16, 15)
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vperm(17, 17, 17, 15)
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vperm(18, 18, 18, 15)
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vperm(19, 19, 19, 15)
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#endif
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mtctr(%[num_blocks])
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label(loop)
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/*
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* Compute next IV into v24..v27
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*/
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vadduwm(24, 16, 28)
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vadduwm(25, 17, 28)
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vadduwm(26, 18, 28)
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vadduwm(27, 19, 28)
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/*
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* Load next data blocks. We do this early on but we
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* won't need them until IV encryption is done.
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*/
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lxvw4x(52, %[cc0], %[buf])
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lxvw4x(53, %[cc1], %[buf])
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lxvw4x(54, %[cc2], %[buf])
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lxvw4x(55, %[cc3], %[buf])
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/*
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* Encrypt the current IV.
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*/
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vxor(16, 16, 0)
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vxor(17, 17, 0)
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vxor(18, 18, 0)
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vxor(19, 19, 0)
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vcipher(16, 16, 1)
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vcipher(17, 17, 1)
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vcipher(18, 18, 1)
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vcipher(19, 19, 1)
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vcipher(16, 16, 2)
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vcipher(17, 17, 2)
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vcipher(18, 18, 2)
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vcipher(19, 19, 2)
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vcipher(16, 16, 3)
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vcipher(17, 17, 3)
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vcipher(18, 18, 3)
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vcipher(19, 19, 3)
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vcipher(16, 16, 4)
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vcipher(17, 17, 4)
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vcipher(18, 18, 4)
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vcipher(19, 19, 4)
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vcipher(16, 16, 5)
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vcipher(17, 17, 5)
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vcipher(18, 18, 5)
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vcipher(19, 19, 5)
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vcipher(16, 16, 6)
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vcipher(17, 17, 6)
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vcipher(18, 18, 6)
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vcipher(19, 19, 6)
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vcipher(16, 16, 7)
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vcipher(17, 17, 7)
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vcipher(18, 18, 7)
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vcipher(19, 19, 7)
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vcipher(16, 16, 8)
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vcipher(17, 17, 8)
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vcipher(18, 18, 8)
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vcipher(19, 19, 8)
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vcipher(16, 16, 9)
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vcipher(17, 17, 9)
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vcipher(18, 18, 9)
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vcipher(19, 19, 9)
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vcipherlast(16, 16, 10)
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vcipherlast(17, 17, 10)
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vcipherlast(18, 18, 10)
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vcipherlast(19, 19, 10)
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#if BR_POWER8_LE
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vperm(16, 16, 16, 15)
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vperm(17, 17, 17, 15)
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vperm(18, 18, 18, 15)
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vperm(19, 19, 19, 15)
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#endif
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/*
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* Load next plaintext word and XOR with encrypted IV.
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*/
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vxor(16, 20, 16)
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vxor(17, 21, 17)
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vxor(18, 22, 18)
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vxor(19, 23, 19)
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stxvw4x(48, %[cc0], %[buf])
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stxvw4x(49, %[cc1], %[buf])
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stxvw4x(50, %[cc2], %[buf])
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stxvw4x(51, %[cc3], %[buf])
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addi(%[buf], %[buf], 64)
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/*
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* Update IV.
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*/
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vand(16, 24, 24)
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vand(17, 25, 25)
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vand(18, 26, 26)
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vand(19, 27, 27)
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bdnz(loop)
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: [cc0] "+b" (cc0), [cc1] "+b" (cc1), [cc2] "+b" (cc2), [cc3] "+b" (cc3),
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[buf] "+b" (buf)
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: [sk] "b" (sk), [ivbuf] "b" (ivbuf), [num_blocks] "b" (num_blocks >> 2),
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[ctrinc] "b" (ctrinc)
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#if BR_POWER8_LE
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, [idx2be] "b" (idx2be)
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#endif
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: "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9",
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"v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19",
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"v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29",
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"ctr", "memory"
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);
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}
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static void
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ctr_192(const unsigned char *sk, const unsigned char *ivbuf,
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unsigned char *buf, size_t num_blocks)
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{
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long cc0, cc1, cc2, cc3;
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#if BR_POWER8_LE
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static const uint32_t idx2be[] = {
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0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C
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};
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#endif
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static const uint32_t ctrinc[] = {
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0, 0, 0, 4
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};
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cc0 = 0;
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cc1 = 16;
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cc2 = 32;
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cc3 = 48;
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asm volatile (
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/*
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* Load subkeys into v0..v12
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*/
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lxvw4x(32, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(33, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(34, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(35, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(36, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(37, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(38, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(39, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(40, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(41, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(42, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(43, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(44, %[cc0], %[sk])
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li(%[cc0], 0)
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#if BR_POWER8_LE
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/*
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* v15 = constant for byteswapping words
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*/
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lxvw4x(47, 0, %[idx2be])
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#endif
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/*
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* v28 = increment for IV counter.
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*/
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lxvw4x(60, 0, %[ctrinc])
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/*
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* Load IV into v16..v19
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*/
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lxvw4x(48, %[cc0], %[ivbuf])
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lxvw4x(49, %[cc1], %[ivbuf])
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lxvw4x(50, %[cc2], %[ivbuf])
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lxvw4x(51, %[cc3], %[ivbuf])
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#if BR_POWER8_LE
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vperm(16, 16, 16, 15)
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vperm(17, 17, 17, 15)
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vperm(18, 18, 18, 15)
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vperm(19, 19, 19, 15)
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#endif
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mtctr(%[num_blocks])
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label(loop)
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/*
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* Compute next IV into v24..v27
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*/
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vadduwm(24, 16, 28)
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vadduwm(25, 17, 28)
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vadduwm(26, 18, 28)
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vadduwm(27, 19, 28)
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/*
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* Load next data blocks. We do this early on but we
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* won't need them until IV encryption is done.
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*/
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lxvw4x(52, %[cc0], %[buf])
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lxvw4x(53, %[cc1], %[buf])
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lxvw4x(54, %[cc2], %[buf])
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lxvw4x(55, %[cc3], %[buf])
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/*
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* Encrypt the current IV.
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*/
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vxor(16, 16, 0)
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vxor(17, 17, 0)
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vxor(18, 18, 0)
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vxor(19, 19, 0)
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vcipher(16, 16, 1)
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vcipher(17, 17, 1)
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vcipher(18, 18, 1)
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vcipher(19, 19, 1)
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vcipher(16, 16, 2)
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vcipher(17, 17, 2)
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vcipher(18, 18, 2)
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vcipher(19, 19, 2)
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vcipher(16, 16, 3)
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vcipher(17, 17, 3)
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vcipher(18, 18, 3)
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vcipher(19, 19, 3)
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vcipher(16, 16, 4)
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vcipher(17, 17, 4)
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vcipher(18, 18, 4)
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vcipher(19, 19, 4)
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vcipher(16, 16, 5)
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vcipher(17, 17, 5)
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vcipher(18, 18, 5)
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vcipher(19, 19, 5)
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vcipher(16, 16, 6)
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vcipher(17, 17, 6)
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vcipher(18, 18, 6)
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vcipher(19, 19, 6)
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vcipher(16, 16, 7)
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vcipher(17, 17, 7)
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vcipher(18, 18, 7)
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vcipher(19, 19, 7)
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vcipher(16, 16, 8)
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vcipher(17, 17, 8)
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vcipher(18, 18, 8)
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vcipher(19, 19, 8)
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vcipher(16, 16, 9)
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vcipher(17, 17, 9)
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vcipher(18, 18, 9)
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vcipher(19, 19, 9)
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vcipher(16, 16, 10)
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vcipher(17, 17, 10)
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vcipher(18, 18, 10)
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vcipher(19, 19, 10)
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vcipher(16, 16, 11)
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vcipher(17, 17, 11)
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vcipher(18, 18, 11)
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vcipher(19, 19, 11)
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vcipherlast(16, 16, 12)
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vcipherlast(17, 17, 12)
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vcipherlast(18, 18, 12)
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vcipherlast(19, 19, 12)
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#if BR_POWER8_LE
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vperm(16, 16, 16, 15)
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vperm(17, 17, 17, 15)
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vperm(18, 18, 18, 15)
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vperm(19, 19, 19, 15)
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#endif
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/*
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* Load next plaintext word and XOR with encrypted IV.
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*/
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vxor(16, 20, 16)
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vxor(17, 21, 17)
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vxor(18, 22, 18)
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vxor(19, 23, 19)
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stxvw4x(48, %[cc0], %[buf])
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stxvw4x(49, %[cc1], %[buf])
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stxvw4x(50, %[cc2], %[buf])
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stxvw4x(51, %[cc3], %[buf])
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addi(%[buf], %[buf], 64)
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/*
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* Update IV.
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*/
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vand(16, 24, 24)
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vand(17, 25, 25)
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vand(18, 26, 26)
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vand(19, 27, 27)
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bdnz(loop)
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: [cc0] "+b" (cc0), [cc1] "+b" (cc1), [cc2] "+b" (cc2), [cc3] "+b" (cc3),
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[buf] "+b" (buf)
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: [sk] "b" (sk), [ivbuf] "b" (ivbuf), [num_blocks] "b" (num_blocks >> 2),
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[ctrinc] "b" (ctrinc)
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#if BR_POWER8_LE
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, [idx2be] "b" (idx2be)
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#endif
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: "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9",
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"v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19",
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"v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29",
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"ctr", "memory"
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);
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}
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static void
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ctr_256(const unsigned char *sk, const unsigned char *ivbuf,
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unsigned char *buf, size_t num_blocks)
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{
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long cc0, cc1, cc2, cc3;
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#if BR_POWER8_LE
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static const uint32_t idx2be[] = {
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0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C
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};
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#endif
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static const uint32_t ctrinc[] = {
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0, 0, 0, 4
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};
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cc0 = 0;
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cc1 = 16;
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cc2 = 32;
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cc3 = 48;
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asm volatile (
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/*
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* Load subkeys into v0..v14
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*/
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lxvw4x(32, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(33, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(34, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(35, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(36, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(37, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(38, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(39, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(40, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(41, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(42, %[cc0], %[sk])
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addi(%[cc0], %[cc0], 16)
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lxvw4x(43, %[cc0], %[sk])
|
|
addi(%[cc0], %[cc0], 16)
|
|
lxvw4x(44, %[cc0], %[sk])
|
|
addi(%[cc0], %[cc0], 16)
|
|
lxvw4x(45, %[cc0], %[sk])
|
|
addi(%[cc0], %[cc0], 16)
|
|
lxvw4x(46, %[cc0], %[sk])
|
|
li(%[cc0], 0)
|
|
|
|
#if BR_POWER8_LE
|
|
/*
|
|
* v15 = constant for byteswapping words
|
|
*/
|
|
lxvw4x(47, 0, %[idx2be])
|
|
#endif
|
|
/*
|
|
* v28 = increment for IV counter.
|
|
*/
|
|
lxvw4x(60, 0, %[ctrinc])
|
|
|
|
/*
|
|
* Load IV into v16..v19
|
|
*/
|
|
lxvw4x(48, %[cc0], %[ivbuf])
|
|
lxvw4x(49, %[cc1], %[ivbuf])
|
|
lxvw4x(50, %[cc2], %[ivbuf])
|
|
lxvw4x(51, %[cc3], %[ivbuf])
|
|
#if BR_POWER8_LE
|
|
vperm(16, 16, 16, 15)
|
|
vperm(17, 17, 17, 15)
|
|
vperm(18, 18, 18, 15)
|
|
vperm(19, 19, 19, 15)
|
|
#endif
|
|
|
|
mtctr(%[num_blocks])
|
|
label(loop)
|
|
/*
|
|
* Compute next IV into v24..v27
|
|
*/
|
|
vadduwm(24, 16, 28)
|
|
vadduwm(25, 17, 28)
|
|
vadduwm(26, 18, 28)
|
|
vadduwm(27, 19, 28)
|
|
|
|
/*
|
|
* Load next data blocks. We do this early on but we
|
|
* won't need them until IV encryption is done.
|
|
*/
|
|
lxvw4x(52, %[cc0], %[buf])
|
|
lxvw4x(53, %[cc1], %[buf])
|
|
lxvw4x(54, %[cc2], %[buf])
|
|
lxvw4x(55, %[cc3], %[buf])
|
|
|
|
/*
|
|
* Encrypt the current IV.
|
|
*/
|
|
vxor(16, 16, 0)
|
|
vxor(17, 17, 0)
|
|
vxor(18, 18, 0)
|
|
vxor(19, 19, 0)
|
|
vcipher(16, 16, 1)
|
|
vcipher(17, 17, 1)
|
|
vcipher(18, 18, 1)
|
|
vcipher(19, 19, 1)
|
|
vcipher(16, 16, 2)
|
|
vcipher(17, 17, 2)
|
|
vcipher(18, 18, 2)
|
|
vcipher(19, 19, 2)
|
|
vcipher(16, 16, 3)
|
|
vcipher(17, 17, 3)
|
|
vcipher(18, 18, 3)
|
|
vcipher(19, 19, 3)
|
|
vcipher(16, 16, 4)
|
|
vcipher(17, 17, 4)
|
|
vcipher(18, 18, 4)
|
|
vcipher(19, 19, 4)
|
|
vcipher(16, 16, 5)
|
|
vcipher(17, 17, 5)
|
|
vcipher(18, 18, 5)
|
|
vcipher(19, 19, 5)
|
|
vcipher(16, 16, 6)
|
|
vcipher(17, 17, 6)
|
|
vcipher(18, 18, 6)
|
|
vcipher(19, 19, 6)
|
|
vcipher(16, 16, 7)
|
|
vcipher(17, 17, 7)
|
|
vcipher(18, 18, 7)
|
|
vcipher(19, 19, 7)
|
|
vcipher(16, 16, 8)
|
|
vcipher(17, 17, 8)
|
|
vcipher(18, 18, 8)
|
|
vcipher(19, 19, 8)
|
|
vcipher(16, 16, 9)
|
|
vcipher(17, 17, 9)
|
|
vcipher(18, 18, 9)
|
|
vcipher(19, 19, 9)
|
|
vcipher(16, 16, 10)
|
|
vcipher(17, 17, 10)
|
|
vcipher(18, 18, 10)
|
|
vcipher(19, 19, 10)
|
|
vcipher(16, 16, 11)
|
|
vcipher(17, 17, 11)
|
|
vcipher(18, 18, 11)
|
|
vcipher(19, 19, 11)
|
|
vcipher(16, 16, 12)
|
|
vcipher(17, 17, 12)
|
|
vcipher(18, 18, 12)
|
|
vcipher(19, 19, 12)
|
|
vcipher(16, 16, 13)
|
|
vcipher(17, 17, 13)
|
|
vcipher(18, 18, 13)
|
|
vcipher(19, 19, 13)
|
|
vcipherlast(16, 16, 14)
|
|
vcipherlast(17, 17, 14)
|
|
vcipherlast(18, 18, 14)
|
|
vcipherlast(19, 19, 14)
|
|
|
|
#if BR_POWER8_LE
|
|
vperm(16, 16, 16, 15)
|
|
vperm(17, 17, 17, 15)
|
|
vperm(18, 18, 18, 15)
|
|
vperm(19, 19, 19, 15)
|
|
#endif
|
|
|
|
/*
|
|
* Load next plaintext word and XOR with encrypted IV.
|
|
*/
|
|
vxor(16, 20, 16)
|
|
vxor(17, 21, 17)
|
|
vxor(18, 22, 18)
|
|
vxor(19, 23, 19)
|
|
stxvw4x(48, %[cc0], %[buf])
|
|
stxvw4x(49, %[cc1], %[buf])
|
|
stxvw4x(50, %[cc2], %[buf])
|
|
stxvw4x(51, %[cc3], %[buf])
|
|
|
|
addi(%[buf], %[buf], 64)
|
|
|
|
/*
|
|
* Update IV.
|
|
*/
|
|
vand(16, 24, 24)
|
|
vand(17, 25, 25)
|
|
vand(18, 26, 26)
|
|
vand(19, 27, 27)
|
|
|
|
bdnz(loop)
|
|
|
|
: [cc0] "+b" (cc0), [cc1] "+b" (cc1), [cc2] "+b" (cc2), [cc3] "+b" (cc3),
|
|
[buf] "+b" (buf)
|
|
: [sk] "b" (sk), [ivbuf] "b" (ivbuf), [num_blocks] "b" (num_blocks >> 2),
|
|
[ctrinc] "b" (ctrinc)
|
|
#if BR_POWER8_LE
|
|
, [idx2be] "b" (idx2be)
|
|
#endif
|
|
: "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9",
|
|
"v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19",
|
|
"v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29",
|
|
"ctr", "memory"
|
|
);
|
|
}
|
|
|
|
/* see bearssl_block.h */
|
|
uint32_t
|
|
br_aes_pwr8_ctr_run(const br_aes_pwr8_ctr_keys *ctx,
|
|
const void *iv, uint32_t cc, void *data, size_t len)
|
|
{
|
|
unsigned char *buf;
|
|
unsigned char ivbuf[64];
|
|
|
|
buf = data;
|
|
memcpy(ivbuf + 0, iv, 12);
|
|
memcpy(ivbuf + 16, iv, 12);
|
|
memcpy(ivbuf + 32, iv, 12);
|
|
memcpy(ivbuf + 48, iv, 12);
|
|
if (len >= 64) {
|
|
br_enc32be(ivbuf + 12, cc + 0);
|
|
br_enc32be(ivbuf + 28, cc + 1);
|
|
br_enc32be(ivbuf + 44, cc + 2);
|
|
br_enc32be(ivbuf + 60, cc + 3);
|
|
switch (ctx->num_rounds) {
|
|
case 10:
|
|
ctr_128(ctx->skey.skni, ivbuf, buf,
|
|
(len >> 4) & ~(size_t)3);
|
|
break;
|
|
case 12:
|
|
ctr_192(ctx->skey.skni, ivbuf, buf,
|
|
(len >> 4) & ~(size_t)3);
|
|
break;
|
|
default:
|
|
ctr_256(ctx->skey.skni, ivbuf, buf,
|
|
(len >> 4) & ~(size_t)3);
|
|
break;
|
|
}
|
|
cc += (len >> 4) & ~(size_t)3;
|
|
buf += len & ~(size_t)63;
|
|
len &= 63;
|
|
}
|
|
if (len > 0) {
|
|
unsigned char tmp[64];
|
|
|
|
memcpy(tmp, buf, len);
|
|
memset(tmp + len, 0, (sizeof tmp) - len);
|
|
br_enc32be(ivbuf + 12, cc + 0);
|
|
br_enc32be(ivbuf + 28, cc + 1);
|
|
br_enc32be(ivbuf + 44, cc + 2);
|
|
br_enc32be(ivbuf + 60, cc + 3);
|
|
switch (ctx->num_rounds) {
|
|
case 10:
|
|
ctr_128(ctx->skey.skni, ivbuf, tmp, 4);
|
|
break;
|
|
case 12:
|
|
ctr_192(ctx->skey.skni, ivbuf, tmp, 4);
|
|
break;
|
|
default:
|
|
ctr_256(ctx->skey.skni, ivbuf, tmp, 4);
|
|
break;
|
|
}
|
|
memcpy(buf, tmp, len);
|
|
cc += (len + 15) >> 4;
|
|
}
|
|
return cc;
|
|
}
|
|
|
|
/* see bearssl_block.h */
|
|
const br_block_ctr_class br_aes_pwr8_ctr_vtable = {
|
|
sizeof(br_aes_pwr8_ctr_keys),
|
|
16,
|
|
4,
|
|
(void (*)(const br_block_ctr_class **, const void *, size_t))
|
|
&br_aes_pwr8_ctr_init,
|
|
(uint32_t (*)(const br_block_ctr_class *const *,
|
|
const void *, uint32_t, void *, size_t))
|
|
&br_aes_pwr8_ctr_run
|
|
};
|
|
|
|
/* see bearssl_block.h */
|
|
const br_block_ctr_class *
|
|
br_aes_pwr8_ctr_get_vtable(void)
|
|
{
|
|
return br_aes_pwr8_supported() ? &br_aes_pwr8_ctr_vtable : NULL;
|
|
}
|
|
|
|
#else
|
|
|
|
/* see bearssl_block.h */
|
|
const br_block_ctr_class *
|
|
br_aes_pwr8_ctr_get_vtable(void)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
#endif
|