]>
Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
8c419778 TA |
2 | /* |
3 | * caam - Freescale FSL CAAM support for Public Key Cryptography descriptors | |
4 | * | |
5 | * Copyright 2016 Freescale Semiconductor, Inc. | |
6 | * | |
7 | * There is no Shared Descriptor for PKC so that the Job Descriptor must carry | |
8 | * all the desired key parameters, input and output pointers. | |
9 | */ | |
10 | ||
11 | #ifndef _PKC_DESC_H_ | |
12 | #define _PKC_DESC_H_ | |
13 | #include "compat.h" | |
14 | #include "pdb.h" | |
15 | ||
52e26d77 RA |
16 | /** |
17 | * caam_priv_key_form - CAAM RSA private key representation | |
4a651b12 | 18 | * CAAM RSA private key may have either of three forms. |
52e26d77 RA |
19 | * |
20 | * 1. The first representation consists of the pair (n, d), where the | |
21 | * components have the following meanings: | |
22 | * n the RSA modulus | |
23 | * d the RSA private exponent | |
24 | * | |
25 | * 2. The second representation consists of the triplet (p, q, d), where the | |
26 | * components have the following meanings: | |
27 | * p the first prime factor of the RSA modulus n | |
28 | * q the second prime factor of the RSA modulus n | |
29 | * d the RSA private exponent | |
4a651b12 RA |
30 | * |
31 | * 3. The third representation consists of the quintuple (p, q, dP, dQ, qInv), | |
32 | * where the components have the following meanings: | |
33 | * p the first prime factor of the RSA modulus n | |
34 | * q the second prime factor of the RSA modulus n | |
35 | * dP the first factors's CRT exponent | |
36 | * dQ the second factors's CRT exponent | |
37 | * qInv the (first) CRT coefficient | |
38 | * | |
39 | * The benefit of using the third or the second key form is lower computational | |
40 | * cost for the decryption and signature operations. | |
52e26d77 RA |
41 | */ |
42 | enum caam_priv_key_form { | |
43 | FORM1, | |
44 | FORM2, | |
4a651b12 | 45 | FORM3 |
52e26d77 RA |
46 | }; |
47 | ||
8c419778 TA |
48 | /** |
49 | * caam_rsa_key - CAAM RSA key structure. Keys are allocated in DMA zone. | |
50 | * @n : RSA modulus raw byte stream | |
51 | * @e : RSA public exponent raw byte stream | |
52 | * @d : RSA private exponent raw byte stream | |
52e26d77 RA |
53 | * @p : RSA prime factor p of RSA modulus n |
54 | * @q : RSA prime factor q of RSA modulus n | |
4a651b12 RA |
55 | * @dp : RSA CRT exponent of p |
56 | * @dp : RSA CRT exponent of q | |
57 | * @qinv : RSA CRT coefficient | |
52e26d77 RA |
58 | * @tmp1 : CAAM uses this temporary buffer as internal state buffer. |
59 | * It is assumed to be as long as p. | |
60 | * @tmp2 : CAAM uses this temporary buffer as internal state buffer. | |
61 | * It is assumed to be as long as q. | |
8c419778 TA |
62 | * @n_sz : length in bytes of RSA modulus n |
63 | * @e_sz : length in bytes of RSA public exponent | |
64 | * @d_sz : length in bytes of RSA private exponent | |
52e26d77 RA |
65 | * @p_sz : length in bytes of RSA prime factor p of RSA modulus n |
66 | * @q_sz : length in bytes of RSA prime factor q of RSA modulus n | |
67 | * @priv_form : CAAM RSA private key representation | |
8c419778 TA |
68 | */ |
69 | struct caam_rsa_key { | |
70 | u8 *n; | |
71 | u8 *e; | |
72 | u8 *d; | |
52e26d77 RA |
73 | u8 *p; |
74 | u8 *q; | |
4a651b12 RA |
75 | u8 *dp; |
76 | u8 *dq; | |
77 | u8 *qinv; | |
52e26d77 RA |
78 | u8 *tmp1; |
79 | u8 *tmp2; | |
8c419778 TA |
80 | size_t n_sz; |
81 | size_t e_sz; | |
82 | size_t d_sz; | |
52e26d77 RA |
83 | size_t p_sz; |
84 | size_t q_sz; | |
85 | enum caam_priv_key_form priv_form; | |
8c419778 TA |
86 | }; |
87 | ||
88 | /** | |
89 | * caam_rsa_ctx - per session context. | |
90 | * @key : RSA key in DMA zone | |
91 | * @dev : device structure | |
92 | */ | |
93 | struct caam_rsa_ctx { | |
94 | struct caam_rsa_key key; | |
95 | struct device *dev; | |
96 | }; | |
97 | ||
98 | /** | |
99 | * rsa_edesc - s/w-extended rsa descriptor | |
100 | * @src_nents : number of segments in input scatterlist | |
101 | * @dst_nents : number of segments in output scatterlist | |
102 | * @sec4_sg_bytes : length of h/w link table | |
103 | * @sec4_sg_dma : dma address of h/w link table | |
104 | * @sec4_sg : pointer to h/w link table | |
105 | * @pdb : specific RSA Protocol Data Block (PDB) | |
106 | * @hw_desc : descriptor followed by link tables if any | |
107 | */ | |
108 | struct rsa_edesc { | |
109 | int src_nents; | |
110 | int dst_nents; | |
111 | int sec4_sg_bytes; | |
112 | dma_addr_t sec4_sg_dma; | |
113 | struct sec4_sg_entry *sec4_sg; | |
114 | union { | |
115 | struct rsa_pub_pdb pub; | |
116 | struct rsa_priv_f1_pdb priv_f1; | |
52e26d77 | 117 | struct rsa_priv_f2_pdb priv_f2; |
4a651b12 | 118 | struct rsa_priv_f3_pdb priv_f3; |
8c419778 TA |
119 | } pdb; |
120 | u32 hw_desc[]; | |
121 | }; | |
122 | ||
123 | /* Descriptor construction primitives. */ | |
124 | void init_rsa_pub_desc(u32 *desc, struct rsa_pub_pdb *pdb); | |
125 | void init_rsa_priv_f1_desc(u32 *desc, struct rsa_priv_f1_pdb *pdb); | |
52e26d77 | 126 | void init_rsa_priv_f2_desc(u32 *desc, struct rsa_priv_f2_pdb *pdb); |
4a651b12 | 127 | void init_rsa_priv_f3_desc(u32 *desc, struct rsa_priv_f3_pdb *pdb); |
8c419778 TA |
128 | |
129 | #endif |