195 lines
4.0 KiB
C
195 lines
4.0 KiB
C
/*
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* AMD Cryptographic Coprocessor (CCP) crypto API support
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*
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* Copyright (C) 2013 Advanced Micro Devices, Inc.
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*
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* Author: Tom Lendacky <thomas.lendacky@amd.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __CCP_CRYPTO_H__
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#define __CCP_CRYPTO_H__
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#include <linux/list.h>
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#include <linux/wait.h>
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#include <linux/pci.h>
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#include <linux/ccp.h>
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#include <linux/crypto.h>
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#include <crypto/algapi.h>
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#include <crypto/aes.h>
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#include <crypto/ctr.h>
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#include <crypto/hash.h>
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#include <crypto/sha.h>
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#define CCP_CRA_PRIORITY 300
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struct ccp_crypto_ablkcipher_alg {
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struct list_head entry;
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u32 mode;
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struct crypto_alg alg;
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};
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struct ccp_crypto_ahash_alg {
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struct list_head entry;
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const __be32 *init;
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u32 type;
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u32 mode;
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/* Child algorithm used for HMAC, CMAC, etc */
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char child_alg[CRYPTO_MAX_ALG_NAME];
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struct ahash_alg alg;
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};
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static inline struct ccp_crypto_ablkcipher_alg *
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ccp_crypto_ablkcipher_alg(struct crypto_tfm *tfm)
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{
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struct crypto_alg *alg = tfm->__crt_alg;
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return container_of(alg, struct ccp_crypto_ablkcipher_alg, alg);
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}
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static inline struct ccp_crypto_ahash_alg *
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ccp_crypto_ahash_alg(struct crypto_tfm *tfm)
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{
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struct crypto_alg *alg = tfm->__crt_alg;
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struct ahash_alg *ahash_alg;
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ahash_alg = container_of(alg, struct ahash_alg, halg.base);
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return container_of(ahash_alg, struct ccp_crypto_ahash_alg, alg);
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}
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/***** AES related defines *****/
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struct ccp_aes_ctx {
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/* Fallback cipher for XTS with unsupported unit sizes */
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struct crypto_ablkcipher *tfm_ablkcipher;
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/* Cipher used to generate CMAC K1/K2 keys */
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struct crypto_cipher *tfm_cipher;
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enum ccp_engine engine;
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enum ccp_aes_type type;
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enum ccp_aes_mode mode;
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struct scatterlist key_sg;
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unsigned int key_len;
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u8 key[AES_MAX_KEY_SIZE];
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u8 nonce[CTR_RFC3686_NONCE_SIZE];
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/* CMAC key structures */
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struct scatterlist k1_sg;
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struct scatterlist k2_sg;
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unsigned int kn_len;
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u8 k1[AES_BLOCK_SIZE];
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u8 k2[AES_BLOCK_SIZE];
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};
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struct ccp_aes_req_ctx {
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struct scatterlist iv_sg;
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u8 iv[AES_BLOCK_SIZE];
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/* Fields used for RFC3686 requests */
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u8 *rfc3686_info;
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u8 rfc3686_iv[AES_BLOCK_SIZE];
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struct ccp_cmd cmd;
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};
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struct ccp_aes_cmac_req_ctx {
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unsigned int null_msg;
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unsigned int final;
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struct scatterlist *src;
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unsigned int nbytes;
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u64 hash_cnt;
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unsigned int hash_rem;
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struct sg_table data_sg;
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struct scatterlist iv_sg;
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u8 iv[AES_BLOCK_SIZE];
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struct scatterlist buf_sg;
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unsigned int buf_count;
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u8 buf[AES_BLOCK_SIZE];
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struct scatterlist pad_sg;
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unsigned int pad_count;
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u8 pad[AES_BLOCK_SIZE];
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struct ccp_cmd cmd;
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};
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/***** SHA related defines *****/
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#define MAX_SHA_CONTEXT_SIZE SHA256_DIGEST_SIZE
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#define MAX_SHA_BLOCK_SIZE SHA256_BLOCK_SIZE
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struct ccp_sha_ctx {
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struct scatterlist opad_sg;
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unsigned int opad_count;
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unsigned int key_len;
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u8 key[MAX_SHA_BLOCK_SIZE];
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u8 ipad[MAX_SHA_BLOCK_SIZE];
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u8 opad[MAX_SHA_BLOCK_SIZE];
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struct crypto_shash *hmac_tfm;
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};
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struct ccp_sha_req_ctx {
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enum ccp_sha_type type;
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u64 msg_bits;
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unsigned int first;
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unsigned int final;
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struct scatterlist *src;
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unsigned int nbytes;
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u64 hash_cnt;
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unsigned int hash_rem;
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struct sg_table data_sg;
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struct scatterlist ctx_sg;
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u8 ctx[MAX_SHA_CONTEXT_SIZE];
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struct scatterlist buf_sg;
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unsigned int buf_count;
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u8 buf[MAX_SHA_BLOCK_SIZE];
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/* CCP driver command */
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struct ccp_cmd cmd;
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};
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/***** Common Context Structure *****/
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struct ccp_ctx {
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int (*complete)(struct crypto_async_request *req, int ret);
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union {
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struct ccp_aes_ctx aes;
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struct ccp_sha_ctx sha;
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} u;
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};
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int ccp_crypto_enqueue_request(struct crypto_async_request *req,
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struct ccp_cmd *cmd);
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struct scatterlist *ccp_crypto_sg_table_add(struct sg_table *table,
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struct scatterlist *sg_add);
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int ccp_register_aes_algs(struct list_head *head);
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int ccp_register_aes_cmac_algs(struct list_head *head);
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int ccp_register_aes_xts_algs(struct list_head *head);
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int ccp_register_sha_algs(struct list_head *head);
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#endif
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