1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright (C) 2012-2019 ARM Limited (or its affiliates). */ 3 4 /* \file cc_aead.h 5 * ARM CryptoCell AEAD Crypto API 6 */ 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 8 17 #define CCM_CONFIG_BUF_SIZE (AES_BLOCK_SIZE * 3) 18 #define MAX_MAC_SIZE SHA256_DIGEST_SIZE 19 20 /* defines for AES GCM configuration buffer */ 21 #define GCM_BLOCK_LEN_SIZE 8 22 23 #define GCM_BLOCK_RFC4_IV_OFFSET 4 24 #define GCM_BLOCK_RFC4_IV_SIZE 8 /* IV size for rfc's */ 25 #define GCM_BLOCK_RFC4_NONCE_OFFSET 0 26 #define GCM_BLOCK_RFC4_NONCE_SIZE 4 27 28 /* Offsets into AES CCM configuration buffer */ 29 #define CCM_B0_OFFSET 0 30 #define CCM_A0_OFFSET 16 31 #define CCM_CTR_COUNT_0_OFFSET 32 32 /* 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 38 enum 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_MAX 44 }; 45 46 struct aead_req_ctx { 47 /* Allocate cache line although only 4 bytes are needed to 48 * assure next field falls @ cache line 49 * Used for both: digest HW compare and CCM/GCM MAC value 50 */ 51 u8 mac_buf[MAX_MAC_SIZE] ____cacheline_aligned; 52 u8 ctr_iv[AES_BLOCK_SIZE] ____cacheline_aligned; 53 54 //used in gcm 55 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 gcm 76 /* 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_rfc4543 103 }; 104 105 int cc_aead_alloc(struct cc_drvdata *drvdata); 106 int cc_aead_free(struct cc_drvdata *drvdata); 107 108 #endif /*__CC_AEAD_H__*/ 109