1 /* 2 * Copyright 2014 Freescale Semiconductor, Inc. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 * 6 */ 7 8 #include <common.h> 9 #include <malloc.h> 10 #include "jobdesc.h" 11 #include "desc.h" 12 #include "jr.h" 13 #include "fsl_hash.h" 14 #include <hw_sha.h> 15 #include <linux/errno.h> 16 17 #define CRYPTO_MAX_ALG_NAME 80 18 #define SHA1_DIGEST_SIZE 20 19 #define SHA256_DIGEST_SIZE 32 20 21 struct caam_hash_template { 22 char name[CRYPTO_MAX_ALG_NAME]; 23 unsigned int digestsize; 24 u32 alg_type; 25 }; 26 27 enum caam_hash_algos { 28 SHA1 = 0, 29 SHA256 30 }; 31 32 static struct caam_hash_template driver_hash[] = { 33 { 34 .name = "sha1", 35 .digestsize = SHA1_DIGEST_SIZE, 36 .alg_type = OP_ALG_ALGSEL_SHA1, 37 }, 38 { 39 .name = "sha256", 40 .digestsize = SHA256_DIGEST_SIZE, 41 .alg_type = OP_ALG_ALGSEL_SHA256, 42 }, 43 }; 44 45 static enum caam_hash_algos get_hash_type(struct hash_algo *algo) 46 { 47 if (!strcmp(algo->name, driver_hash[SHA1].name)) 48 return SHA1; 49 else 50 return SHA256; 51 } 52 53 /* Create the context for progressive hashing using h/w acceleration. 54 * 55 * @ctxp: Pointer to the pointer of the context for hashing 56 * @caam_algo: Enum for SHA1 or SHA256 57 * @return 0 if ok, -ENOMEM on error 58 */ 59 static int caam_hash_init(void **ctxp, enum caam_hash_algos caam_algo) 60 { 61 *ctxp = calloc(1, sizeof(struct sha_ctx)); 62 if (*ctxp == NULL) { 63 debug("Cannot allocate memory for context\n"); 64 return -ENOMEM; 65 } 66 return 0; 67 } 68 69 /* 70 * Update sg table for progressive hashing using h/w acceleration 71 * 72 * The context is freed by this function if an error occurs. 73 * We support at most 32 Scatter/Gather Entries. 74 * 75 * @hash_ctx: Pointer to the context for hashing 76 * @buf: Pointer to the buffer being hashed 77 * @size: Size of the buffer being hashed 78 * @is_last: 1 if this is the last update; 0 otherwise 79 * @caam_algo: Enum for SHA1 or SHA256 80 * @return 0 if ok, -EINVAL on error 81 */ 82 static int caam_hash_update(void *hash_ctx, const void *buf, 83 unsigned int size, int is_last, 84 enum caam_hash_algos caam_algo) 85 { 86 uint32_t final = 0; 87 phys_addr_t addr = virt_to_phys((void *)buf); 88 struct sha_ctx *ctx = hash_ctx; 89 90 if (ctx->sg_num >= MAX_SG_32) { 91 free(ctx); 92 return -EINVAL; 93 } 94 95 #ifdef CONFIG_PHYS_64BIT 96 sec_out32(&ctx->sg_tbl[ctx->sg_num].addr_hi, (uint32_t)(addr >> 32)); 97 #else 98 sec_out32(&ctx->sg_tbl[ctx->sg_num].addr_hi, 0x0); 99 #endif 100 sec_out32(&ctx->sg_tbl[ctx->sg_num].addr_lo, (uint32_t)addr); 101 102 sec_out32(&ctx->sg_tbl[ctx->sg_num].len_flag, 103 (size & SG_ENTRY_LENGTH_MASK)); 104 105 ctx->sg_num++; 106 107 if (is_last) { 108 final = sec_in32(&ctx->sg_tbl[ctx->sg_num - 1].len_flag) | 109 SG_ENTRY_FINAL_BIT; 110 sec_out32(&ctx->sg_tbl[ctx->sg_num - 1].len_flag, final); 111 } 112 113 return 0; 114 } 115 116 /* 117 * Perform progressive hashing on the given buffer and copy hash at 118 * destination buffer 119 * 120 * The context is freed after completion of hash operation. 121 * 122 * @hash_ctx: Pointer to the context for hashing 123 * @dest_buf: Pointer to the destination buffer where hash is to be copied 124 * @size: Size of the buffer being hashed 125 * @caam_algo: Enum for SHA1 or SHA256 126 * @return 0 if ok, -EINVAL on error 127 */ 128 static int caam_hash_finish(void *hash_ctx, void *dest_buf, 129 int size, enum caam_hash_algos caam_algo) 130 { 131 uint32_t len = 0; 132 struct sha_ctx *ctx = hash_ctx; 133 int i = 0, ret = 0; 134 135 if (size < driver_hash[caam_algo].digestsize) { 136 free(ctx); 137 return -EINVAL; 138 } 139 140 for (i = 0; i < ctx->sg_num; i++) 141 len += (sec_in32(&ctx->sg_tbl[i].len_flag) & 142 SG_ENTRY_LENGTH_MASK); 143 144 inline_cnstr_jobdesc_hash(ctx->sha_desc, (uint8_t *)ctx->sg_tbl, len, 145 ctx->hash, 146 driver_hash[caam_algo].alg_type, 147 driver_hash[caam_algo].digestsize, 148 1); 149 150 ret = run_descriptor_jr(ctx->sha_desc); 151 152 if (ret) 153 debug("Error %x\n", ret); 154 else 155 memcpy(dest_buf, ctx->hash, sizeof(ctx->hash)); 156 157 free(ctx); 158 return ret; 159 } 160 161 int caam_hash(const unsigned char *pbuf, unsigned int buf_len, 162 unsigned char *pout, enum caam_hash_algos algo) 163 { 164 int ret = 0; 165 uint32_t *desc; 166 167 desc = malloc(sizeof(int) * MAX_CAAM_DESCSIZE); 168 if (!desc) { 169 debug("Not enough memory for descriptor allocation\n"); 170 return -ENOMEM; 171 } 172 173 inline_cnstr_jobdesc_hash(desc, pbuf, buf_len, pout, 174 driver_hash[algo].alg_type, 175 driver_hash[algo].digestsize, 176 0); 177 178 ret = run_descriptor_jr(desc); 179 180 free(desc); 181 return ret; 182 } 183 184 void hw_sha256(const unsigned char *pbuf, unsigned int buf_len, 185 unsigned char *pout, unsigned int chunk_size) 186 { 187 if (caam_hash(pbuf, buf_len, pout, SHA256)) 188 printf("CAAM was not setup properly or it is faulty\n"); 189 } 190 191 void hw_sha1(const unsigned char *pbuf, unsigned int buf_len, 192 unsigned char *pout, unsigned int chunk_size) 193 { 194 if (caam_hash(pbuf, buf_len, pout, SHA1)) 195 printf("CAAM was not setup properly or it is faulty\n"); 196 } 197 198 int hw_sha_init(struct hash_algo *algo, void **ctxp) 199 { 200 return caam_hash_init(ctxp, get_hash_type(algo)); 201 } 202 203 int hw_sha_update(struct hash_algo *algo, void *ctx, const void *buf, 204 unsigned int size, int is_last) 205 { 206 return caam_hash_update(ctx, buf, size, is_last, get_hash_type(algo)); 207 } 208 209 int hw_sha_finish(struct hash_algo *algo, void *ctx, void *dest_buf, 210 int size) 211 { 212 return caam_hash_finish(ctx, dest_buf, size, get_hash_type(algo)); 213 } 214