1 /*
2 * Copyright 2020-2022 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <string.h>
11 #include <openssl/ec.h>
12 #include "crypto/ec.h"
13 #include "internal/nelem.h"
14
15 typedef struct ec_name2nid_st {
16 const char *name;
17 int nid;
18 } EC_NAME2NID;
19
20 static const EC_NAME2NID curve_list[] = {
21 /* prime field curves */
22 /* secg curves */
23 { "secp112r1", NID_secp112r1 },
24 { "secp112r2", NID_secp112r2 },
25 { "secp128r1", NID_secp128r1 },
26 { "secp128r2", NID_secp128r2 },
27 { "secp160k1", NID_secp160k1 },
28 { "secp160r1", NID_secp160r1 },
29 { "secp160r2", NID_secp160r2 },
30 { "secp192k1", NID_secp192k1 },
31 { "secp224k1", NID_secp224k1 },
32 { "secp224r1", NID_secp224r1 },
33 { "secp256k1", NID_secp256k1 },
34 { "secp384r1", NID_secp384r1 },
35 { "secp521r1", NID_secp521r1 },
36 /* X9.62 curves */
37 { "prime192v1", NID_X9_62_prime192v1 },
38 { "prime192v2", NID_X9_62_prime192v2 },
39 { "prime192v3", NID_X9_62_prime192v3 },
40 { "prime239v1", NID_X9_62_prime239v1 },
41 { "prime239v2", NID_X9_62_prime239v2 },
42 { "prime239v3", NID_X9_62_prime239v3 },
43 { "prime256v1", NID_X9_62_prime256v1 },
44 /* characteristic two field curves */
45 /* NIST/SECG curves */
46 { "sect113r1", NID_sect113r1 },
47 { "sect113r2", NID_sect113r2 },
48 { "sect131r1", NID_sect131r1 },
49 { "sect131r2", NID_sect131r2 },
50 { "sect163k1", NID_sect163k1 },
51 { "sect163r1", NID_sect163r1 },
52 { "sect163r2", NID_sect163r2 },
53 { "sect193r1", NID_sect193r1 },
54 { "sect193r2", NID_sect193r2 },
55 { "sect233k1", NID_sect233k1 },
56 { "sect233r1", NID_sect233r1 },
57 { "sect239k1", NID_sect239k1 },
58 { "sect283k1", NID_sect283k1 },
59 { "sect283r1", NID_sect283r1 },
60 { "sect409k1", NID_sect409k1 },
61 { "sect409r1", NID_sect409r1 },
62 { "sect571k1", NID_sect571k1 },
63 { "sect571r1", NID_sect571r1 },
64 /* X9.62 curves */
65 { "c2pnb163v1", NID_X9_62_c2pnb163v1 },
66 { "c2pnb163v2", NID_X9_62_c2pnb163v2 },
67 { "c2pnb163v3", NID_X9_62_c2pnb163v3 },
68 { "c2pnb176v1", NID_X9_62_c2pnb176v1 },
69 { "c2tnb191v1", NID_X9_62_c2tnb191v1 },
70 { "c2tnb191v2", NID_X9_62_c2tnb191v2 },
71 { "c2tnb191v3", NID_X9_62_c2tnb191v3 },
72 { "c2pnb208w1", NID_X9_62_c2pnb208w1 },
73 { "c2tnb239v1", NID_X9_62_c2tnb239v1 },
74 { "c2tnb239v2", NID_X9_62_c2tnb239v2 },
75 { "c2tnb239v3", NID_X9_62_c2tnb239v3 },
76 { "c2pnb272w1", NID_X9_62_c2pnb272w1 },
77 { "c2pnb304w1", NID_X9_62_c2pnb304w1 },
78 { "c2tnb359v1", NID_X9_62_c2tnb359v1 },
79 { "c2pnb368w1", NID_X9_62_c2pnb368w1 },
80 { "c2tnb431r1", NID_X9_62_c2tnb431r1 },
81 /*
82 * the WAP/WTLS curves [unlike SECG, spec has its own OIDs for curves
83 * from X9.62]
84 */
85 { "wap-wsg-idm-ecid-wtls1", NID_wap_wsg_idm_ecid_wtls1 },
86 { "wap-wsg-idm-ecid-wtls3", NID_wap_wsg_idm_ecid_wtls3 },
87 { "wap-wsg-idm-ecid-wtls4", NID_wap_wsg_idm_ecid_wtls4 },
88 { "wap-wsg-idm-ecid-wtls5", NID_wap_wsg_idm_ecid_wtls5 },
89 { "wap-wsg-idm-ecid-wtls6", NID_wap_wsg_idm_ecid_wtls6 },
90 { "wap-wsg-idm-ecid-wtls7", NID_wap_wsg_idm_ecid_wtls7 },
91 { "wap-wsg-idm-ecid-wtls8", NID_wap_wsg_idm_ecid_wtls8 },
92 { "wap-wsg-idm-ecid-wtls9", NID_wap_wsg_idm_ecid_wtls9 },
93 { "wap-wsg-idm-ecid-wtls10", NID_wap_wsg_idm_ecid_wtls10 },
94 { "wap-wsg-idm-ecid-wtls11", NID_wap_wsg_idm_ecid_wtls11 },
95 { "wap-wsg-idm-ecid-wtls12", NID_wap_wsg_idm_ecid_wtls12 },
96 /* IPSec curves */
97 { "Oakley-EC2N-3", NID_ipsec3 },
98 { "Oakley-EC2N-4", NID_ipsec4 },
99 /* brainpool curves */
100 { "brainpoolP160r1", NID_brainpoolP160r1 },
101 { "brainpoolP160t1", NID_brainpoolP160t1 },
102 { "brainpoolP192r1", NID_brainpoolP192r1 },
103 { "brainpoolP192t1", NID_brainpoolP192t1 },
104 { "brainpoolP224r1", NID_brainpoolP224r1 },
105 { "brainpoolP224t1", NID_brainpoolP224t1 },
106 { "brainpoolP256r1", NID_brainpoolP256r1 },
107 { "brainpoolP256t1", NID_brainpoolP256t1 },
108 { "brainpoolP320r1", NID_brainpoolP320r1 },
109 { "brainpoolP320t1", NID_brainpoolP320t1 },
110 { "brainpoolP384r1", NID_brainpoolP384r1 },
111 { "brainpoolP384t1", NID_brainpoolP384t1 },
112 { "brainpoolP512r1", NID_brainpoolP512r1 },
113 { "brainpoolP512t1", NID_brainpoolP512t1 },
114 /* SM2 curve */
115 { "SM2", NID_sm2 },
116 };
117
OSSL_EC_curve_nid2name(int nid)118 const char *OSSL_EC_curve_nid2name(int nid)
119 {
120 size_t i;
121
122 if (nid <= 0)
123 return NULL;
124
125 for (i = 0; i < OSSL_NELEM(curve_list); i++) {
126 if (curve_list[i].nid == nid)
127 return curve_list[i].name;
128 }
129 return NULL;
130 }
131
ossl_ec_curve_name2nid(const char * name)132 int ossl_ec_curve_name2nid(const char *name)
133 {
134 size_t i;
135 int nid;
136
137 if (name != NULL) {
138 if ((nid = ossl_ec_curve_nist2nid_int(name)) != NID_undef)
139 return nid;
140
141 for (i = 0; i < OSSL_NELEM(curve_list); i++) {
142 if (OPENSSL_strcasecmp(curve_list[i].name, name) == 0)
143 return curve_list[i].nid;
144 }
145 }
146
147 return NID_undef;
148 }
149
150 /* Functions to translate between common NIST curve names and NIDs */
151
152 static const EC_NAME2NID nist_curves[] = {
153 { "B-163", NID_sect163r2 },
154 { "B-233", NID_sect233r1 },
155 { "B-283", NID_sect283r1 },
156 { "B-409", NID_sect409r1 },
157 { "B-571", NID_sect571r1 },
158 { "K-163", NID_sect163k1 },
159 { "K-233", NID_sect233k1 },
160 { "K-283", NID_sect283k1 },
161 { "K-409", NID_sect409k1 },
162 { "K-571", NID_sect571k1 },
163 { "P-192", NID_X9_62_prime192v1 },
164 { "P-224", NID_secp224r1 },
165 { "P-256", NID_X9_62_prime256v1 },
166 { "P-384", NID_secp384r1 },
167 { "P-521", NID_secp521r1 }
168 };
169
ossl_ec_curve_nid2nist_int(int nid)170 const char *ossl_ec_curve_nid2nist_int(int nid)
171 {
172 size_t i;
173 for (i = 0; i < OSSL_NELEM(nist_curves); i++) {
174 if (nist_curves[i].nid == nid)
175 return nist_curves[i].name;
176 }
177 return NULL;
178 }
179
ossl_ec_curve_nist2nid_int(const char * name)180 int ossl_ec_curve_nist2nid_int(const char *name)
181 {
182 size_t i;
183 for (i = 0; i < OSSL_NELEM(nist_curves); i++) {
184 if (strcmp(nist_curves[i].name, name) == 0)
185 return nist_curves[i].nid;
186 }
187 return NID_undef;
188 }
189