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 <memalign.h> 11 #include <fsl_sec.h> 12 #include <linux/errno.h> 13 #include "jobdesc.h" 14 #include "desc.h" 15 #include "jr.h" 16 17 /** 18 * blob_decap() - Decapsulate the data from a blob 19 * @key_mod: - Key modifier address 20 * @src: - Source address (blob) 21 * @dst: - Destination address (data) 22 * @len: - Size of decapsulated data 23 * 24 * Note: Start and end of the key_mod, src and dst buffers have to be aligned to 25 * the cache line size (ARCH_DMA_MINALIGN) for the CAAM operation to succeed. 26 * 27 * Returns zero on success, negative on error. 28 */ 29 int blob_decap(u8 *key_mod, u8 *src, u8 *dst, u32 len) 30 { 31 int ret, size, i = 0; 32 u32 *desc; 33 34 if (!IS_ALIGNED((uintptr_t)key_mod, ARCH_DMA_MINALIGN) || 35 !IS_ALIGNED((uintptr_t)src, ARCH_DMA_MINALIGN) || 36 !IS_ALIGNED((uintptr_t)dst, ARCH_DMA_MINALIGN)) { 37 puts("Error: blob_decap: Address arguments are not aligned!\n"); 38 return -EINVAL; 39 } 40 41 printf("\nDecapsulating blob to get data\n"); 42 desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE); 43 if (!desc) { 44 debug("Not enough memory for descriptor allocation\n"); 45 return -ENOMEM; 46 } 47 48 size = ALIGN(16, ARCH_DMA_MINALIGN); 49 flush_dcache_range((unsigned long)key_mod, 50 (unsigned long)key_mod + size); 51 52 size = ALIGN(BLOB_SIZE(len), ARCH_DMA_MINALIGN); 53 flush_dcache_range((unsigned long)src, 54 (unsigned long)src + size); 55 56 inline_cnstr_jobdesc_blob_decap(desc, key_mod, src, dst, len); 57 58 debug("Descriptor dump:\n"); 59 for (i = 0; i < 14; i++) 60 debug("Word[%d]: %08x\n", i, *(desc + i)); 61 62 size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN); 63 flush_dcache_range((unsigned long)desc, 64 (unsigned long)desc + size); 65 66 ret = run_descriptor_jr(desc); 67 68 if (ret) { 69 printf("Error in blob decapsulation: %d\n", ret); 70 } else { 71 size = ALIGN(len, ARCH_DMA_MINALIGN); 72 invalidate_dcache_range((unsigned long)dst, 73 (unsigned long)dst + size); 74 75 puts("Blob decapsulation successful.\n"); 76 } 77 78 free(desc); 79 return ret; 80 } 81 82 /** 83 * blob_encap() - Encapsulate the data as a blob 84 * @key_mod: - Key modifier address 85 * @src: - Source address (data) 86 * @dst: - Destination address (blob) 87 * @len: - Size of data to be encapsulated 88 * 89 * Note: Start and end of the key_mod, src and dst buffers have to be aligned to 90 * the cache line size (ARCH_DMA_MINALIGN) for the CAAM operation to succeed. 91 * 92 * Returns zero on success, negative on error. 93 */ 94 int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len) 95 { 96 int ret, size, i = 0; 97 u32 *desc; 98 99 if (!IS_ALIGNED((uintptr_t)key_mod, ARCH_DMA_MINALIGN) || 100 !IS_ALIGNED((uintptr_t)src, ARCH_DMA_MINALIGN) || 101 !IS_ALIGNED((uintptr_t)dst, ARCH_DMA_MINALIGN)) { 102 puts("Error: blob_encap: Address arguments are not aligned!\n"); 103 return -EINVAL; 104 } 105 106 printf("\nEncapsulating data to form blob\n"); 107 desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE); 108 if (!desc) { 109 debug("Not enough memory for descriptor allocation\n"); 110 return -ENOMEM; 111 } 112 113 size = ALIGN(16, ARCH_DMA_MINALIGN); 114 flush_dcache_range((unsigned long)key_mod, 115 (unsigned long)key_mod + size); 116 117 size = ALIGN(len, ARCH_DMA_MINALIGN); 118 flush_dcache_range((unsigned long)src, 119 (unsigned long)src + size); 120 121 inline_cnstr_jobdesc_blob_encap(desc, key_mod, src, dst, len); 122 123 debug("Descriptor dump:\n"); 124 for (i = 0; i < 14; i++) 125 debug("Word[%d]: %08x\n", i, *(desc + i)); 126 127 size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN); 128 flush_dcache_range((unsigned long)desc, 129 (unsigned long)desc + size); 130 131 ret = run_descriptor_jr(desc); 132 133 if (ret) { 134 printf("Error in blob encapsulation: %d\n", ret); 135 } else { 136 size = ALIGN(BLOB_SIZE(len), ARCH_DMA_MINALIGN); 137 invalidate_dcache_range((unsigned long)dst, 138 (unsigned long)dst + size); 139 140 puts("Blob encapsulation successful.\n"); 141 } 142 143 free(desc); 144 return ret; 145 } 146 147 #ifdef CONFIG_CMD_DEKBLOB 148 int blob_dek(const u8 *src, u8 *dst, u8 len) 149 { 150 int ret, size, i = 0; 151 u32 *desc; 152 153 int out_sz = WRP_HDR_SIZE + len + KEY_BLOB_SIZE + MAC_SIZE; 154 155 puts("\nEncapsulating provided DEK to form blob\n"); 156 desc = memalign(ARCH_DMA_MINALIGN, 157 sizeof(uint32_t) * DEK_BLOB_DESCSIZE); 158 if (!desc) { 159 debug("Not enough memory for descriptor allocation\n"); 160 return -ENOMEM; 161 } 162 163 ret = inline_cnstr_jobdesc_blob_dek(desc, src, dst, len); 164 if (ret) { 165 debug("Error in Job Descriptor Construction: %d\n", ret); 166 } else { 167 size = roundup(sizeof(uint32_t) * DEK_BLOB_DESCSIZE, 168 ARCH_DMA_MINALIGN); 169 flush_dcache_range((unsigned long)desc, 170 (unsigned long)desc + size); 171 size = roundup(sizeof(uint8_t) * out_sz, ARCH_DMA_MINALIGN); 172 flush_dcache_range((unsigned long)dst, 173 (unsigned long)dst + size); 174 175 ret = run_descriptor_jr(desc); 176 } 177 178 if (ret) { 179 debug("Error in Encapsulation %d\n", ret); 180 goto err; 181 } 182 183 size = roundup(out_sz, ARCH_DMA_MINALIGN); 184 invalidate_dcache_range((unsigned long)dst, (unsigned long)dst+size); 185 186 puts("DEK Blob\n"); 187 for (i = 0; i < out_sz; i++) 188 printf("%02X", ((uint8_t *)dst)[i]); 189 printf("\n"); 190 191 err: 192 free(desc); 193 return ret; 194 } 195 #endif 196