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 15typedef struct ec_name2nid_st { 16 const char *name; 17 int nid; 18} EC_NAME2NID; 19 20static 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 118const 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 132int 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 152static 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 170const 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 180int 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