109 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2/* Copyright (C) 2012-2019 ARM Limited (or its affiliates). */3 4/* \file cc_aead.h5 * ARM CryptoCell AEAD Crypto API6 */7 8#ifndef __CC_AEAD_H__9#define __CC_AEAD_H__10 11#include <linux/kernel.h>12#include <crypto/algapi.h>13#include <crypto/ctr.h>14 15/* mac_cmp - HW writes 8 B but all bytes hold the same value */16#define ICV_CMP_SIZE 817#define CCM_CONFIG_BUF_SIZE (AES_BLOCK_SIZE * 3)18#define MAX_MAC_SIZE SHA256_DIGEST_SIZE19 20/* defines for AES GCM configuration buffer */21#define GCM_BLOCK_LEN_SIZE 822 23#define GCM_BLOCK_RFC4_IV_OFFSET 424#define GCM_BLOCK_RFC4_IV_SIZE 8 /* IV size for rfc's */25#define GCM_BLOCK_RFC4_NONCE_OFFSET 026#define GCM_BLOCK_RFC4_NONCE_SIZE 427 28/* Offsets into AES CCM configuration buffer */29#define CCM_B0_OFFSET 030#define CCM_A0_OFFSET 1631#define CCM_CTR_COUNT_0_OFFSET 3232/* CCM B0 and CTR_COUNT constants. */33#define CCM_BLOCK_NONCE_OFFSET 1 /* Nonce offset inside B0 and CTR_COUNT */34#define CCM_BLOCK_NONCE_SIZE 3 /* Nonce size inside B0 and CTR_COUNT */35#define CCM_BLOCK_IV_OFFSET 4 /* IV offset inside B0 and CTR_COUNT */36#define CCM_BLOCK_IV_SIZE 8 /* IV size inside B0 and CTR_COUNT */37 38enum aead_ccm_header_size {39 ccm_header_size_null = -1,40 ccm_header_size_zero = 0,41 ccm_header_size_2 = 2,42 ccm_header_size_6 = 6,43 ccm_header_size_max = S32_MAX44};45 46struct aead_req_ctx {47 /* Allocate cache line although only 4 bytes are needed to48 * assure next field falls @ cache line49 * Used for both: digest HW compare and CCM/GCM MAC value50 */51 u8 mac_buf[MAX_MAC_SIZE] ____cacheline_aligned;52 u8 ctr_iv[AES_BLOCK_SIZE] ____cacheline_aligned;53 54 //used in gcm55 u8 gcm_iv_inc1[AES_BLOCK_SIZE] ____cacheline_aligned;56 u8 gcm_iv_inc2[AES_BLOCK_SIZE] ____cacheline_aligned;57 u8 hkey[AES_BLOCK_SIZE] ____cacheline_aligned;58 struct {59 u8 len_a[GCM_BLOCK_LEN_SIZE] ____cacheline_aligned;60 u8 len_c[GCM_BLOCK_LEN_SIZE];61 } gcm_len_block;62 63 u8 ccm_config[CCM_CONFIG_BUF_SIZE] ____cacheline_aligned;64 /* HW actual size input */65 unsigned int hw_iv_size ____cacheline_aligned;66 /* used to prevent cache coherence problem */67 u8 backup_mac[MAX_MAC_SIZE];68 u8 *backup_iv; /* store orig iv */69 u32 assoclen; /* size of AAD buffer to authenticate */70 dma_addr_t mac_buf_dma_addr; /* internal ICV DMA buffer */71 /* buffer for internal ccm configurations */72 dma_addr_t ccm_iv0_dma_addr;73 dma_addr_t icv_dma_addr; /* Phys. address of ICV */74 75 //used in gcm76 /* buffer for internal gcm configurations */77 dma_addr_t gcm_iv_inc1_dma_addr;78 /* buffer for internal gcm configurations */79 dma_addr_t gcm_iv_inc2_dma_addr;80 dma_addr_t hkey_dma_addr; /* Phys. address of hkey */81 dma_addr_t gcm_block_len_dma_addr; /* Phys. address of gcm block len */82 83 u8 *icv_virt_addr; /* Virt. address of ICV */84 struct async_gen_req_ctx gen_ctx;85 struct cc_mlli assoc;86 struct cc_mlli src;87 struct cc_mlli dst;88 struct scatterlist *src_sgl;89 struct scatterlist *dst_sgl;90 unsigned int src_offset;91 unsigned int dst_offset;92 enum cc_req_dma_buf_type assoc_buff_type;93 enum cc_req_dma_buf_type data_buff_type;94 struct mlli_params mlli_params;95 unsigned int cryptlen;96 struct scatterlist ccm_adata_sg;97 enum aead_ccm_header_size ccm_hdr_size;98 unsigned int req_authsize;99 enum drv_cipher_mode cipher_mode;100 bool is_icv_fragmented;101 bool is_single_pass;102 bool plaintext_authenticate_only; //for gcm_rfc4543103};104 105int cc_aead_alloc(struct cc_drvdata *drvdata);106int cc_aead_free(struct cc_drvdata *drvdata);107 108#endif /*__CC_AEAD_H__*/109