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Ruchika Guptab9eebfa2014-10-15 11:35:30 +05301/*
2 * SEC Descriptor Construction Library
3 * Basic job descriptor construction
4 *
5 * Copyright 2014 Freescale Semiconductor, Inc.
6 *
7 * SPDX-License-Identifier: GPL-2.0+
8 *
9 */
10
11#include <common.h>
12#include "desc_constr.h"
13#include "jobdesc.h"
14
Ruchika Guptac5de15c2014-10-07 15:46:20 +053015#define KEY_BLOB_SIZE 32
16#define MAC_SIZE 16
17
Ruchika Guptab9eebfa2014-10-15 11:35:30 +053018void inline_cnstr_jobdesc_hash(uint32_t *desc,
19 const uint8_t *msg, uint32_t msgsz, uint8_t *digest,
20 u32 alg_type, uint32_t alg_size, int sg_tbl)
21{
22 /* SHA 256 , output is of length 32 words */
23 uint32_t storelen = alg_size;
24 u32 options;
25 dma_addr_t dma_addr_in, dma_addr_out;
26
27 dma_addr_in = virt_to_phys((void *)msg);
28 dma_addr_out = virt_to_phys((void *)digest);
29
30 init_job_desc(desc, 0);
31 append_operation(desc, OP_TYPE_CLASS2_ALG |
32 OP_ALG_AAI_HASH | OP_ALG_AS_INITFINAL |
33 OP_ALG_ENCRYPT | OP_ALG_ICV_OFF | alg_type);
34
35 options = LDST_CLASS_2_CCB | FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST2;
36 if (sg_tbl)
37 options |= FIFOLDST_SGF;
38 if (msgsz > 0xffff) {
39 options |= FIFOLDST_EXT;
40 append_fifo_load(desc, dma_addr_in, 0, options);
41 append_cmd(desc, msgsz);
42 } else {
43 append_fifo_load(desc, dma_addr_in, msgsz, options);
44 }
45
46 append_store(desc, dma_addr_out, storelen,
47 LDST_CLASS_2_CCB | LDST_SRCDST_BYTE_CONTEXT);
48}
Ruchika Guptac5de15c2014-10-07 15:46:20 +053049
50void inline_cnstr_jobdesc_blob_encap(uint32_t *desc, uint8_t *key_idnfr,
51 uint8_t *plain_txt, uint8_t *enc_blob,
52 uint32_t in_sz)
53{
54 dma_addr_t dma_addr_key_idnfr, dma_addr_in, dma_addr_out;
55 uint32_t key_sz = KEY_IDNFR_SZ_BYTES;
56 /* output blob will have 32 bytes key blob in beginning and
57 * 16 byte HMAC identifier at end of data blob */
58 uint32_t out_sz = in_sz + KEY_BLOB_SIZE + MAC_SIZE;
59
60 dma_addr_key_idnfr = virt_to_phys((void *)key_idnfr);
61 dma_addr_in = virt_to_phys((void *)plain_txt);
62 dma_addr_out = virt_to_phys((void *)enc_blob);
63
64 init_job_desc(desc, 0);
65
66 append_key(desc, dma_addr_key_idnfr, key_sz, CLASS_2);
67
68 append_seq_in_ptr(desc, dma_addr_in, in_sz, 0);
69
70 append_seq_out_ptr(desc, dma_addr_out, out_sz, 0);
71
72 append_operation(desc, OP_TYPE_ENCAP_PROTOCOL | OP_PCLID_BLOB);
73}
74
75void inline_cnstr_jobdesc_blob_decap(uint32_t *desc, uint8_t *key_idnfr,
76 uint8_t *enc_blob, uint8_t *plain_txt,
77 uint32_t out_sz)
78{
79 dma_addr_t dma_addr_key_idnfr, dma_addr_in, dma_addr_out;
80 uint32_t key_sz = KEY_IDNFR_SZ_BYTES;
81 uint32_t in_sz = out_sz + KEY_BLOB_SIZE + MAC_SIZE;
82
83 dma_addr_key_idnfr = virt_to_phys((void *)key_idnfr);
84 dma_addr_in = virt_to_phys((void *)enc_blob);
85 dma_addr_out = virt_to_phys((void *)plain_txt);
86
87 init_job_desc(desc, 0);
88
89 append_key(desc, dma_addr_key_idnfr, key_sz, CLASS_2);
90
91 append_seq_in_ptr(desc, dma_addr_in, in_sz, 0);
92
93 append_seq_out_ptr(desc, dma_addr_out, out_sz, 0);
94
95 append_operation(desc, OP_TYPE_DECAP_PROTOCOL | OP_PCLID_BLOB);
96}
97
98/*
99 * Descriptor to instantiate RNG State Handle 0 in normal mode and
100 * load the JDKEK, TDKEK and TDSK registers
101 */
102void inline_cnstr_jobdesc_rng_instantiation(uint32_t *desc)
103{
104 u32 *jump_cmd;
105
106 init_job_desc(desc, 0);
107
108 /* INIT RNG in non-test mode */
109 append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
110 OP_ALG_AS_INIT);
111
112 /* wait for done */
113 jump_cmd = append_jump(desc, JUMP_CLASS_CLASS1);
114 set_jump_tgt_here(desc, jump_cmd);
115
116 /*
117 * load 1 to clear written reg:
118 * resets the done interrrupt and returns the RNG to idle.
119 */
120 append_load_imm_u32(desc, 1, LDST_SRCDST_WORD_CLRW);
121
122 /* generate secure keys (non-test) */
123 append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
124 OP_ALG_RNG4_SK);
125}