1 /* 2 * Copyright 2017-2020 NXP 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 */ 7 8 #include <errno.h> 9 #include <stdbool.h> 10 #include <stdint.h> 11 #include <stdio.h> 12 #include <stdlib.h> 13 14 #include "caam.h" 15 #include <common/debug.h> 16 #include "jobdesc.h" 17 #include "rsa.h" 18 #include "sec_hw_specific.h" 19 20 21 /* Return Length of desctiptr from first word */ 22 uint32_t desc_length(uint32_t *desc) 23 { 24 return desc[0] & DESC_LEN_MASK; 25 } 26 27 /*Update start index in first word of descriptor */ 28 void desc_update_start_index(uint32_t *desc, uint32_t index) 29 { 30 desc[0] |= (index << DESC_START_SHIFT); 31 } 32 33 /* Initialize the descriptor */ 34 void desc_init(uint32_t *desc) 35 { 36 *desc = 0; 37 } 38 39 /* Add word in the descriptor and increment the length */ 40 void desc_add_word(uint32_t *desc, uint32_t word) 41 { 42 uint32_t len = desc_length(desc); 43 44 /* Add Word at Last */ 45 uint32_t *last = desc + len; 46 *last = word; 47 48 /* Increase the length */ 49 desc[0] += 1; 50 } 51 52 /* Add Pointer to the descriptor */ 53 void desc_add_ptr(uint32_t *desc, phys_addr_t *ptr) 54 { 55 uint32_t len = desc_length(desc); 56 57 /* Add Word at Last */ 58 phys_addr_t *last = (phys_addr_t *) (desc + len); 59 60 #ifdef CONFIG_PHYS_64BIT 61 ptr_addr_t *ptr_addr = (ptr_addr_t *) last; 62 63 ptr_addr->high = PHYS_ADDR_HI(ptr); 64 ptr_addr->low = PHYS_ADDR_LO(ptr); 65 #else 66 *last = ptr; 67 #endif 68 69 /* Increase the length */ 70 desc[0] += (uint32_t) (sizeof(phys_addr_t) / sizeof(uint32_t)); 71 } 72 73 /* Descriptor to generate Random words */ 74 int cnstr_rng_jobdesc(uint32_t *desc, uint32_t state_handle, 75 uint32_t *add_inp, uint32_t add_ip_len, 76 uint8_t *out_data, uint32_t len) 77 { 78 phys_addr_t *phys_addr_out = vtop(out_data); 79 80 /* Current descriptor support only 64K length */ 81 if (len > U(0xffff)) 82 return -1; 83 /* Additional Input not supported by current descriptor */ 84 if (add_ip_len > 0U) 85 return -1; 86 87 VERBOSE("Constructing descriptor\n"); 88 desc_init(desc); 89 /* Class1 Alg Operation,RNG Optype, Generate */ 90 desc_add_word(desc, U(0xb0800000)); 91 desc_add_word(desc, U(0x82500000) | (state_handle << ALG_AAI_SH_SHIFT)); 92 desc_add_word(desc, U(0x60340000) | len); 93 desc_add_ptr(desc, phys_addr_out); 94 95 return 0; 96 97 } 98 99 /* Construct descriptor to instantiate RNG */ 100 int cnstr_rng_instantiate_jobdesc(uint32_t *desc) 101 { 102 desc_init(desc); 103 desc_add_word(desc, U(0xb0800000)); 104 /* Class1 Alg Operation,RNG Optype, Instantiate */ 105 desc_add_word(desc, U(0x82500004)); 106 /* Wait for done */ 107 desc_add_word(desc, U(0xa2000001)); 108 /*Load to clear written */ 109 desc_add_word(desc, U(0x10880004)); 110 /*Pri Mode Reg clear */ 111 desc_add_word(desc, U(0x00000001)); 112 /* Generate secure keys */ 113 desc_add_word(desc, U(0x82501000)); 114 115 return 0; 116 } 117 118 /* Construct descriptor to generate hw key blob */ 119 int cnstr_hw_encap_blob_jobdesc(uint32_t *desc, 120 uint8_t *key_idnfr, uint32_t key_sz, 121 uint32_t key_class, uint8_t *plain_txt, 122 uint32_t in_sz, uint8_t *enc_blob, 123 uint32_t out_sz, uint32_t operation) 124 { 125 phys_addr_t *phys_key_idnfr, *phys_addr_in, *phys_addr_out; 126 int i = 0; 127 128 phys_key_idnfr = vtop((void *)key_idnfr); 129 phys_addr_in = vtop((void *)plain_txt); 130 phys_addr_out = vtop((void *)enc_blob); 131 132 desc_init(desc); 133 134 desc_add_word(desc, U(0xb0800000)); 135 136 /* Key Identifier */ 137 desc_add_word(desc, (key_class | key_sz)); 138 desc_add_ptr(desc, phys_key_idnfr); 139 140 /* Source Address */ 141 desc_add_word(desc, U(0xf0400000)); 142 desc_add_ptr(desc, phys_addr_in); 143 144 /* In Size = 0x10 */ 145 desc_add_word(desc, in_sz); 146 147 /* Out Address */ 148 desc_add_word(desc, U(0xf8400000)); 149 desc_add_ptr(desc, phys_addr_out); 150 151 /* Out Size = 0x10 */ 152 desc_add_word(desc, out_sz); 153 154 /* Operation */ 155 desc_add_word(desc, operation); 156 157 for (i = 0; i < 15; i++) 158 VERBOSE("desc word %x\n", desc[i]); 159 160 return 0; 161 } 162 163 /*************************************************************************** 164 * Function : inline_cnstr_jobdesc_pkha_rsaexp 165 * Arguments : desc - Pointer to Descriptor 166 * pkin - Pointer to Input Params 167 * out - Pointer to Output 168 * out_siz - Output Size 169 * Return : Void 170 * Description : Creates the descriptor for PKHA RSA 171 ***************************************************************************/ 172 void cnstr_jobdesc_pkha_rsaexp(uint32_t *desc, 173 struct pk_in_params *pkin, uint8_t *out, 174 uint32_t out_siz) 175 { 176 phys_addr_t *ptr_addr_e, *ptr_addr_a, *ptr_addr_n, *ptr_addr_out; 177 178 ptr_addr_e = vtop((void *)(pkin->e)); 179 ptr_addr_a = vtop((void *)(pkin->a)); 180 ptr_addr_n = vtop((void *)(pkin->n)); 181 ptr_addr_out = vtop((void *)(out)); 182 183 desc_init(desc); 184 desc_add_word(desc, U(0xb0800000)); 185 desc_add_word(desc, U(0x02010000) | pkin->e_siz); 186 desc_add_ptr(desc, ptr_addr_e); 187 desc_add_word(desc, U(0x220c0000) | pkin->a_siz); 188 desc_add_ptr(desc, ptr_addr_a); 189 desc_add_word(desc, U(0x22080000) | pkin->n_siz); 190 desc_add_ptr(desc, ptr_addr_n); 191 desc_add_word(desc, U(0x81800006)); 192 desc_add_word(desc, U(0x620d0000) | out_siz); 193 desc_add_ptr(desc, ptr_addr_out); 194 } 195 196 /*************************************************************************** 197 * Function : inline_cnstr_jobdesc_sha256 198 * Arguments : desc - Pointer to Descriptor 199 * msg - Pointer to SG Table 200 * msgsz - Size of SG Table 201 * digest - Pointer to Output Digest 202 * Return : Void 203 * Description : Creates the descriptor for SHA256 HASH calculation 204 ***************************************************************************/ 205 void cnstr_hash_jobdesc(uint32_t *desc, uint8_t *msg, uint32_t msgsz, 206 uint8_t *digest) 207 { 208 /* SHA 256 , output is of length 32 words */ 209 phys_addr_t *ptr_addr_in, *ptr_addr_out; 210 211 ptr_addr_in = (void *)vtop(msg); 212 ptr_addr_out = (void *)vtop(digest); 213 214 desc_init(desc); 215 desc_add_word(desc, U(0xb0800000)); 216 217 /* Operation Command 218 * OP_TYPE_CLASS2_ALG | OP_ALG_ALGSEL_SHA256 | OP_ALG_AAI_HASH | 219 * OP_ALG_AS_INITFINAL | OP_ALG_ENCRYPT | OP_ALG_ICV_OFF) 220 */ 221 desc_add_word(desc, U(0x8443000d)); 222 223 if (msgsz > U(0xffff)) { 224 desc_add_word(desc, U(0x25540000)); /* FIFO Load */ 225 desc_add_ptr(desc, ptr_addr_in); /* Pointer to msg */ 226 desc_add_word(desc, msgsz); /* Size */ 227 desc_add_word(desc, U(0x54200020)); /* FIFO Store */ 228 desc_add_ptr(desc, ptr_addr_out); /* Pointer to Result */ 229 } else { 230 desc_add_word(desc, U(0x25140000) | msgsz); 231 desc_add_ptr(desc, ptr_addr_in); 232 desc_add_word(desc, U(0x54200020)); 233 desc_add_ptr(desc, ptr_addr_out); 234 } 235 236 } 237