1 // SPDX-License-Identifier: BSD-2-Clause 2 /* 3 * Copyright (C) 2018, ARM Limited 4 * Copyright (C) 2019, Linaro Limited 5 */ 6 7 #include <assert.h> 8 #include <compiler.h> 9 #include <crypto/crypto_accel.h> 10 #include <crypto/crypto.h> 11 #include <crypto/crypto_impl.h> 12 #include <kernel/panic.h> 13 #include <mbedtls/md.h> 14 #include <mbedtls/platform_util.h> 15 #include <mbedtls/sha1.h> 16 #include <mbedtls/sha256.h> 17 #include <mbedtls/sha512.h> 18 #include <stdlib.h> 19 #include <string_ext.h> 20 #include <string.h> 21 #include <tee_api_types.h> 22 #include <utee_defines.h> 23 #include <util.h> 24 25 struct mbed_hash_ctx { 26 struct crypto_hash_ctx hash_ctx; 27 mbedtls_md_context_t md_ctx; 28 }; 29 30 static const struct crypto_hash_ops mbed_hash_ops; 31 32 static struct mbed_hash_ctx *to_hash_ctx(struct crypto_hash_ctx *ctx) 33 { 34 assert(ctx && ctx->ops == &mbed_hash_ops); 35 36 return container_of(ctx, struct mbed_hash_ctx, hash_ctx); 37 } 38 39 static TEE_Result mbed_hash_init(struct crypto_hash_ctx *ctx) 40 { 41 if (mbedtls_md_starts(&to_hash_ctx(ctx)->md_ctx)) 42 return TEE_ERROR_BAD_STATE; 43 44 return TEE_SUCCESS; 45 } 46 47 static TEE_Result mbed_hash_update(struct crypto_hash_ctx *ctx, 48 const uint8_t *data, size_t len) 49 { 50 if (mbedtls_md_update(&to_hash_ctx(ctx)->md_ctx, data, len)) 51 return TEE_ERROR_BAD_STATE; 52 53 return TEE_SUCCESS; 54 } 55 56 static TEE_Result mbed_hash_final(struct crypto_hash_ctx *ctx, uint8_t *digest, 57 size_t len) 58 { 59 struct mbed_hash_ctx *hc = to_hash_ctx(ctx); 60 uint8_t block_digest[TEE_MAX_HASH_SIZE] = { 0 }; 61 uint8_t *tmp_digest = NULL; 62 size_t hash_size = 0; 63 64 if (len == 0) 65 return TEE_ERROR_BAD_PARAMETERS; 66 67 hash_size = mbedtls_md_get_size(mbedtls_md_info_from_ctx(&hc->md_ctx)); 68 if (hash_size > len) { 69 if (hash_size > sizeof(block_digest)) 70 return TEE_ERROR_BAD_STATE; 71 tmp_digest = block_digest; /* use a tempory buffer */ 72 } else { 73 tmp_digest = digest; 74 } 75 76 if (mbedtls_md_finish(&hc->md_ctx, tmp_digest)) 77 return TEE_ERROR_BAD_STATE; 78 79 if (hash_size > len) 80 memcpy(digest, tmp_digest, len); 81 82 return TEE_SUCCESS; 83 } 84 85 static void mbed_hash_free_ctx(struct crypto_hash_ctx *ctx) 86 { 87 struct mbed_hash_ctx *hc = to_hash_ctx(ctx); 88 89 mbedtls_md_free(&hc->md_ctx); 90 free(hc); 91 } 92 93 static void mbed_hash_copy_state(struct crypto_hash_ctx *dst_ctx, 94 struct crypto_hash_ctx *src_ctx) 95 { 96 struct mbed_hash_ctx *src = to_hash_ctx(src_ctx); 97 struct mbed_hash_ctx *dst = to_hash_ctx(dst_ctx); 98 99 if (mbedtls_md_clone(&dst->md_ctx, &src->md_ctx)) 100 panic(); 101 } 102 103 static const struct crypto_hash_ops mbed_hash_ops = { 104 .init = mbed_hash_init, 105 .update = mbed_hash_update, 106 .final = mbed_hash_final, 107 .free_ctx = mbed_hash_free_ctx, 108 .copy_state = mbed_hash_copy_state, 109 }; 110 111 static TEE_Result mbed_hash_alloc_ctx(struct crypto_hash_ctx **ctx_ret, 112 mbedtls_md_type_t md_type) 113 { 114 int mbed_res = 0; 115 struct mbed_hash_ctx *hc = NULL; 116 const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type(md_type); 117 118 if (!md_info) 119 return TEE_ERROR_NOT_SUPPORTED; 120 121 hc = calloc(1, sizeof(*hc)); 122 if (!hc) 123 return TEE_ERROR_OUT_OF_MEMORY; 124 125 hc->hash_ctx.ops = &mbed_hash_ops; 126 mbed_res = mbedtls_md_setup(&hc->md_ctx, md_info, 0); 127 if (mbed_res) { 128 free(hc); 129 if (mbed_res == MBEDTLS_ERR_MD_ALLOC_FAILED) 130 return TEE_ERROR_OUT_OF_MEMORY; 131 return TEE_ERROR_NOT_SUPPORTED; 132 } 133 134 *ctx_ret = &hc->hash_ctx; 135 136 return TEE_SUCCESS; 137 } 138 139 #if defined(CFG_CRYPTO_MD5) 140 TEE_Result crypto_md5_alloc_ctx(struct crypto_hash_ctx **ctx) 141 { 142 return mbed_hash_alloc_ctx(ctx, MBEDTLS_MD_MD5); 143 } 144 #endif 145 146 #if defined(CFG_CRYPTO_SHA1) 147 TEE_Result crypto_sha1_alloc_ctx(struct crypto_hash_ctx **ctx) 148 { 149 return mbed_hash_alloc_ctx(ctx, MBEDTLS_MD_SHA1); 150 } 151 #endif 152 153 #if defined(CFG_CRYPTO_SHA224) 154 TEE_Result crypto_sha224_alloc_ctx(struct crypto_hash_ctx **ctx) 155 { 156 return mbed_hash_alloc_ctx(ctx, MBEDTLS_MD_SHA224); 157 } 158 #endif 159 160 #if defined(CFG_CRYPTO_SHA256) 161 TEE_Result crypto_sha256_alloc_ctx(struct crypto_hash_ctx **ctx) 162 { 163 return mbed_hash_alloc_ctx(ctx, MBEDTLS_MD_SHA256); 164 } 165 #endif 166 167 #if defined(CFG_CRYPTO_SHA384) 168 TEE_Result crypto_sha384_alloc_ctx(struct crypto_hash_ctx **ctx) 169 { 170 return mbed_hash_alloc_ctx(ctx, MBEDTLS_MD_SHA384); 171 } 172 #endif 173 174 #if defined(CFG_CRYPTO_SHA512) 175 TEE_Result crypto_sha512_alloc_ctx(struct crypto_hash_ctx **ctx) 176 { 177 return mbed_hash_alloc_ctx(ctx, MBEDTLS_MD_SHA512); 178 } 179 #endif 180 181 #if defined(CFG_CRYPTO_SHA256) 182 TEE_Result hash_sha256_check(const uint8_t *hash, const uint8_t *data, 183 size_t data_size) 184 { 185 mbedtls_sha256_context hs; 186 uint8_t digest[TEE_SHA256_HASH_SIZE] = { 0 }; 187 188 memset(&hs, 0, sizeof(hs)); 189 mbedtls_sha256_init(&hs); 190 mbedtls_sha256_starts(&hs, 0); 191 mbedtls_sha256_update(&hs, data, data_size); 192 mbedtls_sha256_finish(&hs, digest); 193 mbedtls_sha256_free(&hs); 194 195 if (consttime_memcmp(digest, hash, sizeof(digest))) 196 return TEE_ERROR_SECURITY; 197 return TEE_SUCCESS; 198 } 199 #endif 200 201 #if defined(MBEDTLS_SHA1_PROCESS_ALT) 202 int mbedtls_internal_sha1_process(mbedtls_sha1_context *ctx, 203 const unsigned char data[64]) 204 { 205 crypto_accel_sha1_compress(ctx->state, data, 1); 206 207 return 0; 208 } 209 #endif /*MBEDTLS_SHA1_PROCESS_ALT*/ 210 211 #if defined(MBEDTLS_SHA256_PROCESS_ALT) 212 int mbedtls_internal_sha256_process(mbedtls_sha256_context *ctx, 213 const unsigned char data[64]) 214 { 215 crypto_accel_sha256_compress(ctx->state, data, 1); 216 217 return 0; 218 } 219 #endif /*MBEDTLS_SHA256_PROCESS_ALT*/ 220 221 #if defined(MBEDTLS_SHA512_PROCESS_ALT) 222 int mbedtls_internal_sha512_process(mbedtls_sha512_context *ctx, 223 const unsigned char data[64]) 224 { 225 crypto_accel_sha512_compress(ctx->state, data, 1); 226 227 return 0; 228 } 229 #endif /*MBEDTLS_SHA512_PROCESS_ALT*/ 230