2 * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
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
11 #include <openssl/core_names.h>
12 #include <openssl/params.h>
13 #include <openssl/ec.h>
14 #include <openssl/rand.h>
15 #include <openssl/err.h>
17 # include <openssl/x509.h>
19 #include "crypto/ecx.h"
20 #include "ecx_backend.h"
23 * The intention with the "backend" source file is to offer backend support
24 * for legacy backends (EVP_PKEY_ASN1_METHOD and EVP_PKEY_METHOD) and provider
25 * implementations alike.
28 int ossl_ecx_public_from_private(ECX_KEY *key)
31 case ECX_KEY_TYPE_X25519:
32 ossl_x25519_public_from_private(key->pubkey, key->privkey);
34 case ECX_KEY_TYPE_ED25519:
35 if (!ossl_ed25519_public_from_private(key->libctx, key->pubkey,
36 key->privkey, key->propq)) {
37 ERR_raise(ERR_LIB_EC, EC_R_FAILED_MAKING_PUBLIC_KEY);
41 case ECX_KEY_TYPE_X448:
42 ossl_x448_public_from_private(key->pubkey, key->privkey);
44 case ECX_KEY_TYPE_ED448:
45 if (!ossl_ed448_public_from_private(key->libctx, key->pubkey,
46 key->privkey, key->propq)) {
47 ERR_raise(ERR_LIB_EC, EC_R_FAILED_MAKING_PUBLIC_KEY);
55 int ossl_ecx_key_fromdata(ECX_KEY *ecx, const OSSL_PARAM params[],
58 size_t privkeylen = 0, pubkeylen = 0;
59 const OSSL_PARAM *param_priv_key = NULL, *param_pub_key;
60 unsigned char *pubkey;
65 param_pub_key = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY);
68 OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
70 if (param_pub_key == NULL && param_priv_key == NULL)
73 if (param_priv_key != NULL) {
74 if (!OSSL_PARAM_get_octet_string(param_priv_key,
75 (void **)&ecx->privkey, ecx->keylen,
78 if (privkeylen != ecx->keylen) {
80 * Invalid key length. We will clear what we've received now. We
81 * can't leave it to ossl_ecx_key_free() because that will call
82 * OPENSSL_secure_clear_free() and assume the correct key length
84 OPENSSL_secure_clear_free(ecx->privkey, privkeylen);
92 if (param_pub_key != NULL
93 && !OSSL_PARAM_get_octet_string(param_pub_key,
95 sizeof(ecx->pubkey), &pubkeylen))
98 if ((param_pub_key != NULL && pubkeylen != ecx->keylen))
101 if (param_pub_key == NULL && !ossl_ecx_public_from_private(ecx))
109 ECX_KEY *ossl_ecx_key_dup(const ECX_KEY *key, int selection)
111 ECX_KEY *ret = OPENSSL_zalloc(sizeof(*ret));
114 ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE);
118 ret->lock = CRYPTO_THREAD_lock_new();
119 if (ret->lock == NULL) {
124 ret->libctx = key->libctx;
125 ret->haspubkey = key->haspubkey;
126 ret->keylen = key->keylen;
127 ret->type = key->type;
130 if (key->propq != NULL) {
131 ret->propq = OPENSSL_strdup(key->propq);
132 if (ret->propq == NULL)
136 if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
137 memcpy(ret->pubkey, key->pubkey, sizeof(ret->pubkey));
139 if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0
140 && key->privkey != NULL) {
141 if (ossl_ecx_key_allocate_privkey(ret) == NULL)
143 memcpy(ret->privkey, key->privkey, ret->keylen);
149 ossl_ecx_key_free(ret);
150 ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE);
155 ECX_KEY *ossl_ecx_key_op(const X509_ALGOR *palg,
156 const unsigned char *p, int plen,
157 int id, ecx_key_op_t op,
158 OSSL_LIB_CTX *libctx, const char *propq)
161 unsigned char *privkey, *pubkey;
163 if (op != KEY_OP_KEYGEN) {
167 /* Algorithm parameters must be absent */
168 X509_ALGOR_get0(NULL, &ptype, NULL, palg);
169 if (ptype != V_ASN1_UNDEF) {
170 ERR_raise(ERR_LIB_EC, EC_R_INVALID_ENCODING);
173 if (id == EVP_PKEY_NONE)
174 id = OBJ_obj2nid(palg->algorithm);
175 else if (id != OBJ_obj2nid(palg->algorithm)) {
176 ERR_raise(ERR_LIB_EC, EC_R_INVALID_ENCODING);
181 if (p == NULL || id == EVP_PKEY_NONE || plen != KEYLENID(id)) {
182 ERR_raise(ERR_LIB_EC, EC_R_INVALID_ENCODING);
187 key = ossl_ecx_key_new(libctx, KEYNID2TYPE(id), 1, propq);
189 ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE);
192 pubkey = key->pubkey;
194 if (op == KEY_OP_PUBLIC) {
195 memcpy(pubkey, p, plen);
197 privkey = ossl_ecx_key_allocate_privkey(key);
198 if (privkey == NULL) {
199 ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE);
202 if (op == KEY_OP_KEYGEN) {
203 if (id != EVP_PKEY_NONE) {
204 if (RAND_priv_bytes_ex(libctx, privkey, KEYLENID(id), 0) <= 0)
206 if (id == EVP_PKEY_X25519) {
208 privkey[X25519_KEYLEN - 1] &= 127;
209 privkey[X25519_KEYLEN - 1] |= 64;
210 } else if (id == EVP_PKEY_X448) {
212 privkey[X448_KEYLEN - 1] |= 128;
216 memcpy(privkey, p, KEYLENID(id));
218 if (!ossl_ecx_public_from_private(key)) {
219 ERR_raise(ERR_LIB_EC, EC_R_FAILED_MAKING_PUBLIC_KEY);
226 ossl_ecx_key_free(key);
230 ECX_KEY *ossl_ecx_key_from_pkcs8(const PKCS8_PRIV_KEY_INFO *p8inf,
231 OSSL_LIB_CTX *libctx, const char *propq)
234 const unsigned char *p;
236 ASN1_OCTET_STRING *oct = NULL;
237 const X509_ALGOR *palg;
239 if (!PKCS8_pkey_get0(NULL, &p, &plen, &palg, p8inf))
242 oct = d2i_ASN1_OCTET_STRING(NULL, &p, plen);
247 p = ASN1_STRING_get0_data(oct);
248 plen = ASN1_STRING_length(oct);
252 * EVP_PKEY_NONE means that ecx_key_op() has to figure out the key type
255 ecx = ossl_ecx_key_op(palg, p, plen, EVP_PKEY_NONE, KEY_OP_PRIVATE,
257 ASN1_OCTET_STRING_free(oct);