| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Glue Code for x86_64/AVX/AES-NI assembler optimized version of Camellia |
| * |
| * Copyright © 2012-2013 Jussi Kivilinna <[email protected]> |
| */ |
| |
| #include <asm/crypto/camellia.h> |
| #include <asm/crypto/glue_helper.h> |
| #include <crypto/algapi.h> |
| #include <crypto/internal/simd.h> |
| #include <crypto/xts.h> |
| #include <linux/crypto.h> |
| #include <linux/err.h> |
| #include <linux/module.h> |
| #include <linux/types.h> |
| |
| #define CAMELLIA_AESNI_PARALLEL_BLOCKS 16 |
| |
| /* 16-way parallel cipher functions (avx/aes-ni) */ |
| asmlinkage void camellia_ecb_enc_16way(struct camellia_ctx *ctx, u8 *dst, |
| const u8 *src); |
| EXPORT_SYMBOL_GPL(camellia_ecb_enc_16way); |
| |
| asmlinkage void camellia_ecb_dec_16way(struct camellia_ctx *ctx, u8 *dst, |
| const u8 *src); |
| EXPORT_SYMBOL_GPL(camellia_ecb_dec_16way); |
| |
| asmlinkage void camellia_cbc_dec_16way(struct camellia_ctx *ctx, u8 *dst, |
| const u8 *src); |
| EXPORT_SYMBOL_GPL(camellia_cbc_dec_16way); |
| |
| asmlinkage void camellia_ctr_16way(struct camellia_ctx *ctx, u8 *dst, |
| const u8 *src, le128 *iv); |
| EXPORT_SYMBOL_GPL(camellia_ctr_16way); |
| |
| asmlinkage void camellia_xts_enc_16way(struct camellia_ctx *ctx, u8 *dst, |
| const u8 *src, le128 *iv); |
| EXPORT_SYMBOL_GPL(camellia_xts_enc_16way); |
| |
| asmlinkage void camellia_xts_dec_16way(struct camellia_ctx *ctx, u8 *dst, |
| const u8 *src, le128 *iv); |
| EXPORT_SYMBOL_GPL(camellia_xts_dec_16way); |
| |
| void camellia_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv) |
| { |
| glue_xts_crypt_128bit_one(ctx, dst, src, iv, |
| GLUE_FUNC_CAST(camellia_enc_blk)); |
| } |
| EXPORT_SYMBOL_GPL(camellia_xts_enc); |
| |
| void camellia_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv) |
| { |
| glue_xts_crypt_128bit_one(ctx, dst, src, iv, |
| GLUE_FUNC_CAST(camellia_dec_blk)); |
| } |
| EXPORT_SYMBOL_GPL(camellia_xts_dec); |
| |
| static const struct common_glue_ctx camellia_enc = { |
| .num_funcs = 3, |
| .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS, |
| |
| .funcs = { { |
| .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS, |
| .fn_u = { .ecb = GLUE_FUNC_CAST(camellia_ecb_enc_16way) } |
| }, { |
| .num_blocks = 2, |
| .fn_u = { .ecb = GLUE_FUNC_CAST(camellia_enc_blk_2way) } |
| }, { |
| .num_blocks = 1, |
| .fn_u = { .ecb = GLUE_FUNC_CAST(camellia_enc_blk) } |
| } } |
| }; |
| |
| static const struct common_glue_ctx camellia_ctr = { |
| .num_funcs = 3, |
| .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS, |
| |
| .funcs = { { |
| .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS, |
| .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(camellia_ctr_16way) } |
| }, { |
| .num_blocks = 2, |
| .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(camellia_crypt_ctr_2way) } |
| }, { |
| .num_blocks = 1, |
| .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(camellia_crypt_ctr) } |
| } } |
| }; |
| |
| static const struct common_glue_ctx camellia_enc_xts = { |
| .num_funcs = 2, |
| .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS, |
| |
| .funcs = { { |
| .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS, |
| .fn_u = { .xts = GLUE_XTS_FUNC_CAST(camellia_xts_enc_16way) } |
| }, { |
| .num_blocks = 1, |
| .fn_u = { .xts = GLUE_XTS_FUNC_CAST(camellia_xts_enc) } |
| } } |
| }; |
| |
| static const struct common_glue_ctx camellia_dec = { |
| .num_funcs = 3, |
| .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS, |
| |
| .funcs = { { |
| .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS, |
| .fn_u = { .ecb = GLUE_FUNC_CAST(camellia_ecb_dec_16way) } |
| }, { |
| .num_blocks = 2, |
| .fn_u = { .ecb = GLUE_FUNC_CAST(camellia_dec_blk_2way) } |
| }, { |
| .num_blocks = 1, |
| .fn_u = { .ecb = GLUE_FUNC_CAST(camellia_dec_blk) } |
| } } |
| }; |
| |
| static const struct common_glue_ctx camellia_dec_cbc = { |
| .num_funcs = 3, |
| .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS, |
| |
| .funcs = { { |
| .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS, |
| .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(camellia_cbc_dec_16way) } |
| }, { |
| .num_blocks = 2, |
| .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(camellia_decrypt_cbc_2way) } |
| }, { |
| .num_blocks = 1, |
| .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(camellia_dec_blk) } |
| } } |
| }; |
| |
| static const struct common_glue_ctx camellia_dec_xts = { |
| .num_funcs = 2, |
| .fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS, |
| |
| .funcs = { { |
| .num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS, |
| .fn_u = { .xts = GLUE_XTS_FUNC_CAST(camellia_xts_dec_16way) } |
| }, { |
| .num_blocks = 1, |
| .fn_u = { .xts = GLUE_XTS_FUNC_CAST(camellia_xts_dec) } |
| } } |
| }; |
| |
| static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key, |
| unsigned int keylen) |
| { |
| return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen, |
| &tfm->base.crt_flags); |
| } |
| |
| static int ecb_encrypt(struct skcipher_request *req) |
| { |
| return glue_ecb_req_128bit(&camellia_enc, req); |
| } |
| |
| static int ecb_decrypt(struct skcipher_request *req) |
| { |
| return glue_ecb_req_128bit(&camellia_dec, req); |
| } |
| |
| static int cbc_encrypt(struct skcipher_request *req) |
| { |
| return glue_cbc_encrypt_req_128bit(GLUE_FUNC_CAST(camellia_enc_blk), |
| req); |
| } |
| |
| static int cbc_decrypt(struct skcipher_request *req) |
| { |
| return glue_cbc_decrypt_req_128bit(&camellia_dec_cbc, req); |
| } |
| |
| static int ctr_crypt(struct skcipher_request *req) |
| { |
| return glue_ctr_req_128bit(&camellia_ctr, req); |
| } |
| |
| int xts_camellia_setkey(struct crypto_skcipher *tfm, const u8 *key, |
| unsigned int keylen) |
| { |
| struct camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm); |
| u32 *flags = &tfm->base.crt_flags; |
| int err; |
| |
| err = xts_verify_key(tfm, key, keylen); |
| if (err) |
| return err; |
| |
| /* first half of xts-key is for crypt */ |
| err = __camellia_setkey(&ctx->crypt_ctx, key, keylen / 2, flags); |
| if (err) |
| return err; |
| |
| /* second half of xts-key is for tweak */ |
| return __camellia_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2, |
| flags); |
| } |
| EXPORT_SYMBOL_GPL(xts_camellia_setkey); |
| |
| static int xts_encrypt(struct skcipher_request *req) |
| { |
| struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
| struct camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm); |
| |
| return glue_xts_req_128bit(&camellia_enc_xts, req, |
| XTS_TWEAK_CAST(camellia_enc_blk), |
| &ctx->tweak_ctx, &ctx->crypt_ctx); |
| } |
| |
| static int xts_decrypt(struct skcipher_request *req) |
| { |
| struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
| struct camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm); |
| |
| return glue_xts_req_128bit(&camellia_dec_xts, req, |
| XTS_TWEAK_CAST(camellia_enc_blk), |
| &ctx->tweak_ctx, &ctx->crypt_ctx); |
| } |
| |
| static struct skcipher_alg camellia_algs[] = { |
| { |
| .base.cra_name = "__ecb(camellia)", |
| .base.cra_driver_name = "__ecb-camellia-aesni", |
| .base.cra_priority = 400, |
| .base.cra_flags = CRYPTO_ALG_INTERNAL, |
| .base.cra_blocksize = CAMELLIA_BLOCK_SIZE, |
| .base.cra_ctxsize = sizeof(struct camellia_ctx), |
| .base.cra_module = THIS_MODULE, |
| .min_keysize = CAMELLIA_MIN_KEY_SIZE, |
| .max_keysize = CAMELLIA_MAX_KEY_SIZE, |
| .setkey = camellia_setkey, |
| .encrypt = ecb_encrypt, |
| .decrypt = ecb_decrypt, |
| }, { |
| .base.cra_name = "__cbc(camellia)", |
| .base.cra_driver_name = "__cbc-camellia-aesni", |
| .base.cra_priority = 400, |
| .base.cra_flags = CRYPTO_ALG_INTERNAL, |
| .base.cra_blocksize = CAMELLIA_BLOCK_SIZE, |
| .base.cra_ctxsize = sizeof(struct camellia_ctx), |
| .base.cra_module = THIS_MODULE, |
| .min_keysize = CAMELLIA_MIN_KEY_SIZE, |
| .max_keysize = CAMELLIA_MAX_KEY_SIZE, |
| .ivsize = CAMELLIA_BLOCK_SIZE, |
| .setkey = camellia_setkey, |
| .encrypt = cbc_encrypt, |
| .decrypt = cbc_decrypt, |
| }, { |
| .base.cra_name = "__ctr(camellia)", |
| .base.cra_driver_name = "__ctr-camellia-aesni", |
| .base.cra_priority = 400, |
| .base.cra_flags = CRYPTO_ALG_INTERNAL, |
| .base.cra_blocksize = 1, |
| .base.cra_ctxsize = sizeof(struct camellia_ctx), |
| .base.cra_module = THIS_MODULE, |
| .min_keysize = CAMELLIA_MIN_KEY_SIZE, |
| .max_keysize = CAMELLIA_MAX_KEY_SIZE, |
| .ivsize = CAMELLIA_BLOCK_SIZE, |
| .chunksize = CAMELLIA_BLOCK_SIZE, |
| .setkey = camellia_setkey, |
| .encrypt = ctr_crypt, |
| .decrypt = ctr_crypt, |
| }, { |
| .base.cra_name = "__xts(camellia)", |
| .base.cra_driver_name = "__xts-camellia-aesni", |
| .base.cra_priority = 400, |
| .base.cra_flags = CRYPTO_ALG_INTERNAL, |
| .base.cra_blocksize = CAMELLIA_BLOCK_SIZE, |
| .base.cra_ctxsize = sizeof(struct camellia_xts_ctx), |
| .base.cra_module = THIS_MODULE, |
| .min_keysize = 2 * CAMELLIA_MIN_KEY_SIZE, |
| .max_keysize = 2 * CAMELLIA_MAX_KEY_SIZE, |
| .ivsize = CAMELLIA_BLOCK_SIZE, |
| .setkey = xts_camellia_setkey, |
| .encrypt = xts_encrypt, |
| .decrypt = xts_decrypt, |
| }, |
| }; |
| |
| static struct simd_skcipher_alg *camellia_simd_algs[ARRAY_SIZE(camellia_algs)]; |
| |
| static int __init camellia_aesni_init(void) |
| { |
| const char *feature_name; |
| |
| if (!boot_cpu_has(X86_FEATURE_AVX) || |
| !boot_cpu_has(X86_FEATURE_AES) || |
| !boot_cpu_has(X86_FEATURE_OSXSAVE)) { |
| pr_info("AVX or AES-NI instructions are not detected.\n"); |
| return -ENODEV; |
| } |
| |
| if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, |
| &feature_name)) { |
| pr_info("CPU feature '%s' is not supported.\n", feature_name); |
| return -ENODEV; |
| } |
| |
| return simd_register_skciphers_compat(camellia_algs, |
| ARRAY_SIZE(camellia_algs), |
| camellia_simd_algs); |
| } |
| |
| static void __exit camellia_aesni_fini(void) |
| { |
| simd_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs), |
| camellia_simd_algs); |
| } |
| |
| module_init(camellia_aesni_init); |
| module_exit(camellia_aesni_fini); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX optimized"); |
| MODULE_ALIAS_CRYPTO("camellia"); |
| MODULE_ALIAS_CRYPTO("camellia-asm"); |
