/* * Glue Code for x86_64/AVX/AES-NI assembler optimized version of Camellia * * Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi> * * 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 <linux/module.h> #include <linux/types.h> #include <linux/crypto.h> #include <linux/err.h> #include <crypto/algapi.h> #include <crypto/ctr.h> #include <crypto/lrw.h> #include <crypto/xts.h> #include <asm/xcr.h> #include <asm/xsave.h> #include <asm/crypto/camellia.h> #include <asm/crypto/ablk_helper.h> #include <asm/crypto/glue_helper.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 ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { return glue_ecb_crypt_128bit(&camellia_enc, desc, dst, src, nbytes); } static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { return glue_ecb_crypt_128bit(&camellia_dec, desc, dst, src, nbytes); } static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(camellia_enc_blk), desc, dst, src, nbytes); } static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { return glue_cbc_decrypt_128bit(&camellia_dec_cbc, desc, dst, src, nbytes); } static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { return glue_ctr_crypt_128bit(&camellia_ctr, desc, dst, src, nbytes); } static inline bool camellia_fpu_begin(bool fpu_enabled, unsigned int nbytes) { return glue_fpu_begin(CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS, NULL, fpu_enabled, nbytes); } static inline void camellia_fpu_end(bool fpu_enabled) { glue_fpu_end(fpu_enabled); } static int camellia_setkey(struct crypto_tfm *tfm, const u8 *in_key, unsigned int key_len) { return __camellia_setkey(crypto_tfm_ctx(tfm), in_key, key_len, &tfm->crt_flags); } struct crypt_priv { struct camellia_ctx *ctx; bool fpu_enabled; }; static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes) { const unsigned int bsize = CAMELLIA_BLOCK_SIZE; struct crypt_priv *ctx = priv; int i; ctx->fpu_enabled = camellia_fpu_begin(ctx->fpu_enabled, nbytes); if (nbytes >= CAMELLIA_AESNI_PARALLEL_BLOCKS * bsize) { camellia_ecb_enc_16way(ctx->ctx, srcdst, srcdst); srcdst += bsize * CAMELLIA_AESNI_PARALLEL_BLOCKS; nbytes -= bsize * CAMELLIA_AESNI_PARALLEL_BLOCKS; } while (nbytes >= CAMELLIA_PARALLEL_BLOCKS * bsize) { camellia_enc_blk_2way(ctx->ctx, srcdst, srcdst); srcdst += bsize * CAMELLIA_PARALLEL_BLOCKS; nbytes -= bsize * CAMELLIA_PARALLEL_BLOCKS; } for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) camellia_enc_blk(ctx->ctx, srcdst, srcdst); } static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes) { const unsigned int bsize = CAMELLIA_BLOCK_SIZE; struct crypt_priv *ctx = priv; int i; ctx->fpu_enabled = camellia_fpu_begin(ctx->fpu_enabled, nbytes); if (nbytes >= CAMELLIA_AESNI_PARALLEL_BLOCKS * bsize) { camellia_ecb_dec_16way(ctx->ctx, srcdst, srcdst); srcdst += bsize * CAMELLIA_AESNI_PARALLEL_BLOCKS; nbytes -= bsize * CAMELLIA_AESNI_PARALLEL_BLOCKS; } while (nbytes >= CAMELLIA_PARALLEL_BLOCKS * bsize) { camellia_dec_blk_2way(ctx->ctx, srcdst, srcdst); srcdst += bsize * CAMELLIA_PARALLEL_BLOCKS; nbytes -= bsize * CAMELLIA_PARALLEL_BLOCKS; } for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) camellia_dec_blk(ctx->ctx, srcdst, srcdst); } static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { struct camellia_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); be128 buf[CAMELLIA_AESNI_PARALLEL_BLOCKS]; struct crypt_priv crypt_ctx = { .ctx = &ctx->camellia_ctx, .fpu_enabled = false, }; struct lrw_crypt_req req = { .tbuf = buf, .tbuflen = sizeof(buf), .table_ctx = &ctx->lrw_table, .crypt_ctx = &crypt_ctx, .crypt_fn = encrypt_callback, }; int ret; desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; ret = lrw_crypt(desc, dst, src, nbytes, &req); camellia_fpu_end(crypt_ctx.fpu_enabled); return ret; } static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { struct camellia_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); be128 buf[CAMELLIA_AESNI_PARALLEL_BLOCKS]; struct crypt_priv crypt_ctx = { .ctx = &ctx->camellia_ctx, .fpu_enabled = false, }; struct lrw_crypt_req req = { .tbuf = buf, .tbuflen = sizeof(buf), .table_ctx = &ctx->lrw_table, .crypt_ctx = &crypt_ctx, .crypt_fn = decrypt_callback, }; int ret; desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; ret = lrw_crypt(desc, dst, src, nbytes, &req); camellia_fpu_end(crypt_ctx.fpu_enabled); return ret; } static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { struct camellia_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); return glue_xts_crypt_128bit(&camellia_enc_xts, desc, dst, src, nbytes, XTS_TWEAK_CAST(camellia_enc_blk), &ctx->tweak_ctx, &ctx->crypt_ctx); } static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { struct camellia_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); return glue_xts_crypt_128bit(&camellia_dec_xts, desc, dst, src, nbytes, XTS_TWEAK_CAST(camellia_enc_blk), &ctx->tweak_ctx, &ctx->crypt_ctx); } static struct crypto_alg cmll_algs[10] = { { .cra_name = "__ecb-camellia-aesni", .cra_driver_name = "__driver-ecb-camellia-aesni", .cra_priority = 0, .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, .cra_blocksize = CAMELLIA_BLOCK_SIZE, .cra_ctxsize = sizeof(struct camellia_ctx), .cra_alignmask = 0, .cra_type = &crypto_blkcipher_type, .cra_module = THIS_MODULE, .cra_u = { .blkcipher = { .min_keysize = CAMELLIA_MIN_KEY_SIZE, .max_keysize = CAMELLIA_MAX_KEY_SIZE, .setkey = camellia_setkey, .encrypt = ecb_encrypt, .decrypt = ecb_decrypt, }, }, }, { .cra_name = "__cbc-camellia-aesni", .cra_driver_name = "__driver-cbc-camellia-aesni", .cra_priority = 0, .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, .cra_blocksize = CAMELLIA_BLOCK_SIZE, .cra_ctxsize = sizeof(struct camellia_ctx), .cra_alignmask = 0, .cra_type = &crypto_blkcipher_type, .cra_module = THIS_MODULE, .cra_u = { .blkcipher = { .min_keysize = CAMELLIA_MIN_KEY_SIZE, .max_keysize = CAMELLIA_MAX_KEY_SIZE, .setkey = camellia_setkey, .encrypt = cbc_encrypt, .decrypt = cbc_decrypt, }, }, }, { .cra_name = "__ctr-camellia-aesni", .cra_driver_name = "__driver-ctr-camellia-aesni", .cra_priority = 0, .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, .cra_blocksize = 1, .cra_ctxsize = sizeof(struct camellia_ctx), .cra_alignmask = 0, .cra_type = &crypto_blkcipher_type, .cra_module = THIS_MODULE, .cra_u = { .blkcipher = { .min_keysize = CAMELLIA_MIN_KEY_SIZE, .max_keysize = CAMELLIA_MAX_KEY_SIZE, .ivsize = CAMELLIA_BLOCK_SIZE, .setkey = camellia_setkey, .encrypt = ctr_crypt, .decrypt = ctr_crypt, }, }, }, { .cra_name = "__lrw-camellia-aesni", .cra_driver_name = "__driver-lrw-camellia-aesni", .cra_priority = 0, .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, .cra_blocksize = CAMELLIA_BLOCK_SIZE, .cra_ctxsize = sizeof(struct camellia_lrw_ctx), .cra_alignmask = 0, .cra_type = &crypto_blkcipher_type, .cra_module = THIS_MODULE, .cra_exit = lrw_camellia_exit_tfm, .cra_u = { .blkcipher = { .min_keysize = CAMELLIA_MIN_KEY_SIZE + CAMELLIA_BLOCK_SIZE, .max_keysize = CAMELLIA_MAX_KEY_SIZE + CAMELLIA_BLOCK_SIZE, .ivsize = CAMELLIA_BLOCK_SIZE, .setkey = lrw_camellia_setkey, .encrypt = lrw_encrypt, .decrypt = lrw_decrypt, }, }, }, { .cra_name = "__xts-camellia-aesni", .cra_driver_name = "__driver-xts-camellia-aesni", .cra_priority = 0, .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, .cra_blocksize = CAMELLIA_BLOCK_SIZE, .cra_ctxsize = sizeof(struct camellia_xts_ctx), .cra_alignmask = 0, .cra_type = &crypto_blkcipher_type, .cra_module = THIS_MODULE, .cra_u = { .blkcipher = { .min_keysize = CAMELLIA_MIN_KEY_SIZE * 2, .max_keysize = CAMELLIA_MAX_KEY_SIZE * 2, .ivsize = CAMELLIA_BLOCK_SIZE, .setkey = xts_camellia_setkey, .encrypt = xts_encrypt, .decrypt = xts_decrypt, }, }, }, { .cra_name = "ecb(camellia)", .cra_driver_name = "ecb-camellia-aesni", .cra_priority = 400, .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, .cra_blocksize = CAMELLIA_BLOCK_SIZE, .cra_ctxsize = sizeof(struct async_helper_ctx), .cra_alignmask = 0, .cra_type = &crypto_ablkcipher_type, .cra_module = THIS_MODULE, .cra_init = ablk_init, .cra_exit = ablk_exit, .cra_u = { .ablkcipher = { .min_keysize = CAMELLIA_MIN_KEY_SIZE, .max_keysize = CAMELLIA_MAX_KEY_SIZE, .setkey = ablk_set_key, .encrypt = ablk_encrypt, .decrypt = ablk_decrypt, }, }, }, { .cra_name = "cbc(camellia)", .cra_driver_name = "cbc-camellia-aesni", .cra_priority = 400, .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, .cra_blocksize = CAMELLIA_BLOCK_SIZE, .cra_ctxsize = sizeof(struct async_helper_ctx), .cra_alignmask = 0, .cra_type = &crypto_ablkcipher_type, .cra_module = THIS_MODULE, .cra_init = ablk_init, .cra_exit = ablk_exit, .cra_u = { .ablkcipher = { .min_keysize = CAMELLIA_MIN_KEY_SIZE, .max_keysize = CAMELLIA_MAX_KEY_SIZE, .ivsize = CAMELLIA_BLOCK_SIZE, .setkey = ablk_set_key, .encrypt = __ablk_encrypt, .decrypt = ablk_decrypt, }, }, }, { .cra_name = "ctr(camellia)", .cra_driver_name = "ctr-camellia-aesni", .cra_priority = 400, .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, .cra_blocksize = 1, .cra_ctxsize = sizeof(struct async_helper_ctx), .cra_alignmask = 0, .cra_type = &crypto_ablkcipher_type, .cra_module = THIS_MODULE, .cra_init = ablk_init, .cra_exit = ablk_exit, .cra_u = { .ablkcipher = { .min_keysize = CAMELLIA_MIN_KEY_SIZE, .max_keysize = CAMELLIA_MAX_KEY_SIZE, .ivsize = CAMELLIA_BLOCK_SIZE, .setkey = ablk_set_key, .encrypt = ablk_encrypt, .decrypt = ablk_encrypt, .geniv = "chainiv", }, }, }, { .cra_name = "lrw(camellia)", .cra_driver_name = "lrw-camellia-aesni", .cra_priority = 400, .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, .cra_blocksize = CAMELLIA_BLOCK_SIZE, .cra_ctxsize = sizeof(struct async_helper_ctx), .cra_alignmask = 0, .cra_type = &crypto_ablkcipher_type, .cra_module = THIS_MODULE, .cra_init = ablk_init, .cra_exit = ablk_exit, .cra_u = { .ablkcipher = { .min_keysize = CAMELLIA_MIN_KEY_SIZE + CAMELLIA_BLOCK_SIZE, .max_keysize = CAMELLIA_MAX_KEY_SIZE + CAMELLIA_BLOCK_SIZE, .ivsize = CAMELLIA_BLOCK_SIZE, .setkey = ablk_set_key, .encrypt = ablk_encrypt, .decrypt = ablk_decrypt, }, }, }, { .cra_name = "xts(camellia)", .cra_driver_name = "xts-camellia-aesni", .cra_priority = 400, .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, .cra_blocksize = CAMELLIA_BLOCK_SIZE, .cra_ctxsize = sizeof(struct async_helper_ctx), .cra_alignmask = 0, .cra_type = &crypto_ablkcipher_type, .cra_module = THIS_MODULE, .cra_init = ablk_init, .cra_exit = ablk_exit, .cra_u = { .ablkcipher = { .min_keysize = CAMELLIA_MIN_KEY_SIZE * 2, .max_keysize = CAMELLIA_MAX_KEY_SIZE * 2, .ivsize = CAMELLIA_BLOCK_SIZE, .setkey = ablk_set_key, .encrypt = ablk_encrypt, .decrypt = ablk_decrypt, }, }, } }; static int __init camellia_aesni_init(void) { u64 xcr0; if (!cpu_has_avx || !cpu_has_aes || !cpu_has_osxsave) { pr_info("AVX or AES-NI instructions are not detected.\n"); return -ENODEV; } xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); if ((xcr0 & (XSTATE_SSE | XSTATE_YMM)) != (XSTATE_SSE | XSTATE_YMM)) { pr_info("AVX detected but unusable.\n"); return -ENODEV; } return crypto_register_algs(cmll_algs, ARRAY_SIZE(cmll_algs)); } static void __exit camellia_aesni_fini(void) { crypto_unregister_algs(cmll_algs, ARRAY_SIZE(cmll_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("camellia"); MODULE_ALIAS("camellia-asm");