2 * Copyright 1999-2021 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
12 #include "internal/cryptlib.h"
13 #include <openssl/x509.h>
14 #include <openssl/rand.h>
15 #include <openssl/encoder.h>
16 #include <openssl/decoder.h>
17 #include "internal/provider.h"
18 #include "crypto/asn1.h"
19 #include "crypto/evp.h"
20 #include "crypto/x509.h"
22 /* Extract a private key from a PKCS8 structure */
24 EVP_PKEY *evp_pkcs82pkey_legacy(const PKCS8_PRIV_KEY_INFO *p8, OSSL_LIB_CTX *libctx,
27 EVP_PKEY *pkey = NULL;
28 const ASN1_OBJECT *algoid;
31 if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8))
34 if ((pkey = EVP_PKEY_new()) == NULL) {
35 ERR_raise(ERR_LIB_EVP, ERR_R_EVP_LIB);
39 if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(algoid))) {
40 i2t_ASN1_OBJECT(obj_tmp, 80, algoid);
41 ERR_raise_data(ERR_LIB_EVP, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM,
46 if (pkey->ameth->priv_decode_ex != NULL) {
47 if (!pkey->ameth->priv_decode_ex(pkey, p8, libctx, propq))
49 } else if (pkey->ameth->priv_decode != NULL) {
50 if (!pkey->ameth->priv_decode(pkey, p8)) {
51 ERR_raise(ERR_LIB_EVP, EVP_R_PRIVATE_KEY_DECODE_ERROR);
55 ERR_raise(ERR_LIB_EVP, EVP_R_METHOD_NOT_SUPPORTED);
66 EVP_PKEY *EVP_PKCS82PKEY_ex(const PKCS8_PRIV_KEY_INFO *p8, OSSL_LIB_CTX *libctx,
69 EVP_PKEY *pkey = NULL;
70 const unsigned char *p8_data = NULL;
71 unsigned char *encoded_data = NULL;
75 OSSL_DECODER_CTX *dctx = NULL;
77 if ((encoded_len = i2d_PKCS8_PRIV_KEY_INFO(p8, &encoded_data)) <= 0
78 || encoded_data == NULL)
81 p8_data = encoded_data;
83 selection = EVP_PKEY_KEYPAIR | EVP_PKEY_KEY_PARAMETERS;
84 dctx = OSSL_DECODER_CTX_new_for_pkey(&pkey, "DER", "PrivateKeyInfo",
85 NULL, selection, libctx, propq);
87 || !OSSL_DECODER_from_data(dctx, &p8_data, &len))
89 pkey = evp_pkcs82pkey_legacy(p8, libctx, propq);
91 OPENSSL_clear_free(encoded_data, encoded_len);
92 OSSL_DECODER_CTX_free(dctx);
96 EVP_PKEY *EVP_PKCS82PKEY(const PKCS8_PRIV_KEY_INFO *p8)
98 return EVP_PKCS82PKEY_ex(p8, NULL, NULL);
101 /* Turn a private key into a PKCS8 structure */
103 PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(const EVP_PKEY *pkey)
105 PKCS8_PRIV_KEY_INFO *p8 = NULL;
106 OSSL_ENCODER_CTX *ctx = NULL;
109 * The implementation for provider-native keys is to encode the
110 * key to a DER encoded PKCS#8 structure, then convert it to a
111 * PKCS8_PRIV_KEY_INFO with good old d2i functions.
113 if (evp_pkey_is_provided(pkey)) {
114 int selection = OSSL_KEYMGMT_SELECT_ALL;
115 unsigned char *der = NULL;
117 const unsigned char *pp;
119 if ((ctx = OSSL_ENCODER_CTX_new_for_pkey(pkey, selection,
120 "DER", "PrivateKeyInfo",
122 || !OSSL_ENCODER_to_data(ctx, &der, &derlen))
126 p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, &pp, (long)derlen);
131 p8 = PKCS8_PRIV_KEY_INFO_new();
133 ERR_raise(ERR_LIB_EVP, ERR_R_ASN1_LIB);
137 if (pkey->ameth != NULL) {
138 if (pkey->ameth->priv_encode != NULL) {
139 if (!pkey->ameth->priv_encode(p8, pkey)) {
140 ERR_raise(ERR_LIB_EVP, EVP_R_PRIVATE_KEY_ENCODE_ERROR);
144 ERR_raise(ERR_LIB_EVP, EVP_R_METHOD_NOT_SUPPORTED);
148 ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
154 PKCS8_PRIV_KEY_INFO_free(p8);
157 OSSL_ENCODER_CTX_free(ctx);
162 /* EVP_PKEY attribute functions */
164 int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
166 return X509at_get_attr_count(key->attributes);
169 int EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid, int lastpos)
171 return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
174 int EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, const ASN1_OBJECT *obj,
177 return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
180 X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
182 return X509at_get_attr(key->attributes, loc);
185 X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
187 return X509at_delete_attr(key->attributes, loc);
190 int EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
192 if (X509at_add1_attr(&key->attributes, attr))
197 int EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key,
198 const ASN1_OBJECT *obj, int type,
199 const unsigned char *bytes, int len)
201 if (X509at_add1_attr_by_OBJ(&key->attributes, obj, type, bytes, len))
206 int EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key,
208 const unsigned char *bytes, int len)
210 if (X509at_add1_attr_by_NID(&key->attributes, nid, type, bytes, len))
215 int EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key,
216 const char *attrname, int type,
217 const unsigned char *bytes, int len)
219 if (X509at_add1_attr_by_txt(&key->attributes, attrname, type, bytes, len))
224 const char *EVP_PKEY_get0_type_name(const EVP_PKEY *key)
226 const EVP_PKEY_ASN1_METHOD *ameth;
227 const char *name = NULL;
229 if (key->keymgmt != NULL)
230 return EVP_KEYMGMT_get0_name(key->keymgmt);
232 /* Otherwise fallback to legacy */
233 ameth = EVP_PKEY_get0_asn1(key);
235 EVP_PKEY_asn1_get0_info(NULL, NULL,
236 NULL, NULL, &name, ameth);
241 const OSSL_PROVIDER *EVP_PKEY_get0_provider(const EVP_PKEY *key)
243 if (evp_pkey_is_provided(key))
244 return EVP_KEYMGMT_get0_provider(key->keymgmt);