diff options
Diffstat (limited to 'third_party/bearssl/src/aes_pwr8_cbcenc.c')
| -rw-r--r-- | third_party/bearssl/src/aes_pwr8_cbcenc.c | 417 |
1 files changed, 417 insertions, 0 deletions
diff --git a/third_party/bearssl/src/aes_pwr8_cbcenc.c b/third_party/bearssl/src/aes_pwr8_cbcenc.c new file mode 100644 index 0000000..00f8eca --- /dev/null +++ b/third_party/bearssl/src/aes_pwr8_cbcenc.c @@ -0,0 +1,417 @@ +/* + * Copyright (c) 2017 Thomas Pornin <[email protected]> + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#define BR_POWER_ASM_MACROS 1 +#include "inner.h" + +#if BR_POWER8 + +/* see bearssl_block.h */ +void +br_aes_pwr8_cbcenc_init(br_aes_pwr8_cbcenc_keys *ctx, + const void *key, size_t len) +{ + ctx->vtable = &br_aes_pwr8_cbcenc_vtable; + ctx->num_rounds = br_aes_pwr8_keysched(ctx->skey.skni, key, len); +} + +static void +cbcenc_128(const unsigned char *sk, + const unsigned char *iv, unsigned char *buf, size_t len) +{ + long cc; + +#if BR_POWER8_LE + static const uint32_t idx2be[] = { + 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C + }; +#endif + + cc = 0; + asm volatile ( + + /* + * Load subkeys into v0..v10 + */ + lxvw4x(32, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(33, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(34, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(35, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(36, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(37, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(38, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(39, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(40, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(41, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(42, %[cc], %[sk]) + +#if BR_POWER8_LE + /* + * v15 = constant for byteswapping words + */ + lxvw4x(47, 0, %[idx2be]) +#endif + /* + * Load IV into v16. + */ + lxvw4x(48, 0, %[iv]) +#if BR_POWER8_LE + vperm(16, 16, 16, 15) +#endif + + mtctr(%[num_blocks]) + label(loop) + /* + * Load next plaintext word and XOR with current IV. + */ + lxvw4x(49, 0, %[buf]) +#if BR_POWER8_LE + vperm(17, 17, 17, 15) +#endif + vxor(16, 16, 17) + + /* + * Encrypt the block. + */ + vxor(16, 16, 0) + vcipher(16, 16, 1) + vcipher(16, 16, 2) + vcipher(16, 16, 3) + vcipher(16, 16, 4) + vcipher(16, 16, 5) + vcipher(16, 16, 6) + vcipher(16, 16, 7) + vcipher(16, 16, 8) + vcipher(16, 16, 9) + vcipherlast(16, 16, 10) + + /* + * Store back result (with byteswap) + */ +#if BR_POWER8_LE + vperm(17, 16, 16, 15) + stxvw4x(49, 0, %[buf]) +#else + stxvw4x(48, 0, %[buf]) +#endif + addi(%[buf], %[buf], 16) + + bdnz(loop) + +: [cc] "+b" (cc), [buf] "+b" (buf) +: [sk] "b" (sk), [iv] "b" (iv), [num_blocks] "b" (len >> 4) +#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", + "ctr", "memory" + ); +} + +static void +cbcenc_192(const unsigned char *sk, + const unsigned char *iv, unsigned char *buf, size_t len) +{ + long cc; + +#if BR_POWER8_LE + static const uint32_t idx2be[] = { + 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C + }; +#endif + + cc = 0; + asm volatile ( + + /* + * Load subkeys into v0..v12 + */ + lxvw4x(32, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(33, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(34, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(35, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(36, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(37, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(38, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(39, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(40, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(41, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(42, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(43, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(44, %[cc], %[sk]) + +#if BR_POWER8_LE + /* + * v15 = constant for byteswapping words + */ + lxvw4x(47, 0, %[idx2be]) +#endif + /* + * Load IV into v16. + */ + lxvw4x(48, 0, %[iv]) +#if BR_POWER8_LE + vperm(16, 16, 16, 15) +#endif + + mtctr(%[num_blocks]) + label(loop) + /* + * Load next plaintext word and XOR with current IV. + */ + lxvw4x(49, 0, %[buf]) +#if BR_POWER8_LE + vperm(17, 17, 17, 15) +#endif + vxor(16, 16, 17) + + /* + * Encrypt the block. + */ + vxor(16, 16, 0) + vcipher(16, 16, 1) + vcipher(16, 16, 2) + vcipher(16, 16, 3) + vcipher(16, 16, 4) + vcipher(16, 16, 5) + vcipher(16, 16, 6) + vcipher(16, 16, 7) + vcipher(16, 16, 8) + vcipher(16, 16, 9) + vcipher(16, 16, 10) + vcipher(16, 16, 11) + vcipherlast(16, 16, 12) + + /* + * Store back result (with byteswap) + */ +#if BR_POWER8_LE + vperm(17, 16, 16, 15) + stxvw4x(49, 0, %[buf]) +#else + stxvw4x(48, 0, %[buf]) +#endif + addi(%[buf], %[buf], 16) + + bdnz(loop) + +: [cc] "+b" (cc), [buf] "+b" (buf) +: [sk] "b" (sk), [iv] "b" (iv), [num_blocks] "b" (len >> 4) +#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", + "ctr", "memory" + ); +} + +static void +cbcenc_256(const unsigned char *sk, + const unsigned char *iv, unsigned char *buf, size_t len) +{ + long cc; + +#if BR_POWER8_LE + static const uint32_t idx2be[] = { + 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C + }; +#endif + + cc = 0; + asm volatile ( + + /* + * Load subkeys into v0..v14 + */ + lxvw4x(32, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(33, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(34, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(35, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(36, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(37, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(38, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(39, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(40, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(41, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(42, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(43, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(44, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(45, %[cc], %[sk]) + addi(%[cc], %[cc], 16) + lxvw4x(46, %[cc], %[sk]) + +#if BR_POWER8_LE + /* + * v15 = constant for byteswapping words + */ + lxvw4x(47, 0, %[idx2be]) +#endif + /* + * Load IV into v16. + */ + lxvw4x(48, 0, %[iv]) +#if BR_POWER8_LE + vperm(16, 16, 16, 15) +#endif + + mtctr(%[num_blocks]) + label(loop) + /* + * Load next plaintext word and XOR with current IV. + */ + lxvw4x(49, 0, %[buf]) +#if BR_POWER8_LE + vperm(17, 17, 17, 15) +#endif + vxor(16, 16, 17) + + /* + * Encrypt the block. + */ + vxor(16, 16, 0) + vcipher(16, 16, 1) + vcipher(16, 16, 2) + vcipher(16, 16, 3) + vcipher(16, 16, 4) + vcipher(16, 16, 5) + vcipher(16, 16, 6) + vcipher(16, 16, 7) + vcipher(16, 16, 8) + vcipher(16, 16, 9) + vcipher(16, 16, 10) + vcipher(16, 16, 11) + vcipher(16, 16, 12) + vcipher(16, 16, 13) + vcipherlast(16, 16, 14) + + /* + * Store back result (with byteswap) + */ +#if BR_POWER8_LE + vperm(17, 16, 16, 15) + stxvw4x(49, 0, %[buf]) +#else + stxvw4x(48, 0, %[buf]) +#endif + addi(%[buf], %[buf], 16) + + bdnz(loop) + +: [cc] "+b" (cc), [buf] "+b" (buf) +: [sk] "b" (sk), [iv] "b" (iv), [num_blocks] "b" (len >> 4) +#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", + "ctr", "memory" + ); +} + +/* see bearssl_block.h */ +void +br_aes_pwr8_cbcenc_run(const br_aes_pwr8_cbcenc_keys *ctx, + void *iv, void *data, size_t len) +{ + if (len > 0) { + switch (ctx->num_rounds) { + case 10: + cbcenc_128(ctx->skey.skni, iv, data, len); + break; + case 12: + cbcenc_192(ctx->skey.skni, iv, data, len); + break; + default: + cbcenc_256(ctx->skey.skni, iv, data, len); + break; + } + memcpy(iv, (unsigned char *)data + (len - 16), 16); + } +} + +/* see bearssl_block.h */ +const br_block_cbcenc_class br_aes_pwr8_cbcenc_vtable = { + sizeof(br_aes_pwr8_cbcenc_keys), + 16, + 4, + (void (*)(const br_block_cbcenc_class **, const void *, size_t)) + &br_aes_pwr8_cbcenc_init, + (void (*)(const br_block_cbcenc_class *const *, void *, void *, size_t)) + &br_aes_pwr8_cbcenc_run +}; + +/* see bearssl_block.h */ +const br_block_cbcenc_class * +br_aes_pwr8_cbcenc_get_vtable(void) +{ + return br_aes_pwr8_supported() ? &br_aes_pwr8_cbcenc_vtable : NULL; +} + +#else + +/* see bearssl_block.h */ +const br_block_cbcenc_class * +br_aes_pwr8_cbcenc_get_vtable(void) +{ + return NULL; +} + +#endif |