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/*
* Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <stdlib.h>
#include "internal/cryptlib.h"
#include <openssl/x509.h>
#include <openssl/rand.h>
#include <openssl/encoder.h>
#include <openssl/decoder.h>
#include "internal/provider.h"
#include "crypto/asn1.h"
#include "crypto/evp.h"
#include "crypto/x509.h"
/* Extract a private key from a PKCS8 structure */
EVP_PKEY *evp_pkcs82pkey_legacy(const PKCS8_PRIV_KEY_INFO *p8, OSSL_LIB_CTX *libctx,
const char *propq)
{
EVP_PKEY *pkey = NULL;
const ASN1_OBJECT *algoid;
char obj_tmp[80];
if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8))
return NULL;
if ((pkey = EVP_PKEY_new()) == NULL) {
ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
return NULL;
}
if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(algoid))) {
i2t_ASN1_OBJECT(obj_tmp, 80, algoid);
ERR_raise_data(ERR_LIB_EVP, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM,
"TYPE=%s", obj_tmp);
goto error;
}
if (pkey->ameth->priv_decode_ex != NULL) {
if (!pkey->ameth->priv_decode_ex(pkey, p8, libctx, propq))
goto error;
} else if (pkey->ameth->priv_decode != NULL) {
if (!pkey->ameth->priv_decode(pkey, p8)) {
ERR_raise(ERR_LIB_EVP, EVP_R_PRIVATE_KEY_DECODE_ERROR);
goto error;
}
} else {
ERR_raise(ERR_LIB_EVP, EVP_R_METHOD_NOT_SUPPORTED);
goto error;
}
return pkey;
error:
EVP_PKEY_free(pkey);
return NULL;
}
EVP_PKEY *EVP_PKCS82PKEY_ex(const PKCS8_PRIV_KEY_INFO *p8, OSSL_LIB_CTX *libctx,
const char *propq)
{
EVP_PKEY *pkey = NULL;
const unsigned char *p8_data = NULL;
unsigned char *encoded_data = NULL;
int encoded_len;
size_t len;
OSSL_DECODER_CTX *dctx = NULL;
if ((encoded_len = i2d_PKCS8_PRIV_KEY_INFO(p8, &encoded_data)) <= 0
|| encoded_data == NULL)
return NULL;
p8_data = encoded_data;
len = encoded_len;
dctx = OSSL_DECODER_CTX_new_for_pkey(&pkey, "DER", "pkcs8", EVP_PKEY_NONE,
0, libctx, propq);
if (dctx == NULL
|| !OSSL_DECODER_from_data(dctx, &p8_data, &len))
/* try legacy */
pkey = evp_pkcs82pkey_legacy(p8, libctx, propq);
OPENSSL_clear_free(encoded_data, encoded_len);
OSSL_DECODER_CTX_free(dctx);
return pkey;
}
EVP_PKEY *EVP_PKCS82PKEY(const PKCS8_PRIV_KEY_INFO *p8)
{
return EVP_PKCS82PKEY_ex(p8, NULL, NULL);
}
/* Turn a private key into a PKCS8 structure */
PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(const EVP_PKEY *pkey)
{
PKCS8_PRIV_KEY_INFO *p8 = NULL;
OSSL_ENCODER_CTX *ctx = NULL;
/*
* The implementation for provider-native keys is to encode the
* key to a DER encoded PKCS#8 structure, then convert it to a
* PKCS8_PRIV_KEY_INFO with good old d2i functions.
*/
if (evp_pkey_is_provided(pkey)) {
int selection = OSSL_KEYMGMT_SELECT_ALL;
unsigned char *der = NULL;
size_t derlen = 0;
const unsigned char *pp;
if ((ctx = OSSL_ENCODER_CTX_new_for_pkey(pkey, selection,
"DER", "pkcs8",
NULL)) == NULL
|| !OSSL_ENCODER_to_data(ctx, &der, &derlen))
goto error;
pp = der;
p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, &pp, (long)derlen);
OPENSSL_free(der);
if (p8 == NULL)
goto error;
} else {
p8 = PKCS8_PRIV_KEY_INFO_new();
if (p8 == NULL) {
ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
return NULL;
}
if (pkey->ameth != NULL) {
if (pkey->ameth->priv_encode != NULL) {
if (!pkey->ameth->priv_encode(p8, pkey)) {
ERR_raise(ERR_LIB_EVP, EVP_R_PRIVATE_KEY_ENCODE_ERROR);
goto error;
}
} else {
ERR_raise(ERR_LIB_EVP, EVP_R_METHOD_NOT_SUPPORTED);
goto error;
}
} else {
ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
goto error;
}
}
goto end;
error:
PKCS8_PRIV_KEY_INFO_free(p8);
p8 = NULL;
end:
OSSL_ENCODER_CTX_free(ctx);
return p8;
}
/* EVP_PKEY attribute functions */
int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
{
return X509at_get_attr_count(key->attributes);
}
int EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid, int lastpos)
{
return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
}
int EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, const ASN1_OBJECT *obj,
int lastpos)
{
return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
}
X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
{
return X509at_get_attr(key->attributes, loc);
}
X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
{
return X509at_delete_attr(key->attributes, loc);
}
int EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
{
if (X509at_add1_attr(&key->attributes, attr))
return 1;
return 0;
}
int EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key,
const ASN1_OBJECT *obj, int type,
const unsigned char *bytes, int len)
{
if (X509at_add1_attr_by_OBJ(&key->attributes, obj, type, bytes, len))
return 1;
return 0;
}
int EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key,
int nid, int type,
const unsigned char *bytes, int len)
{
if (X509at_add1_attr_by_NID(&key->attributes, nid, type, bytes, len))
return 1;
return 0;
}
int EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key,
const char *attrname, int type,
const unsigned char *bytes, int len)
{
if (X509at_add1_attr_by_txt(&key->attributes, attrname, type, bytes, len))
return 1;
return 0;
}
const char *EVP_PKEY_get0_first_alg_name(const EVP_PKEY *key)
{
const EVP_PKEY_ASN1_METHOD *ameth;
const char *name = NULL;
if (key->keymgmt != NULL)
return EVP_KEYMGMT_get0_first_name(key->keymgmt);
/* Otherwise fallback to legacy */
ameth = EVP_PKEY_get0_asn1(key);
if (ameth != NULL)
EVP_PKEY_asn1_get0_info(NULL, NULL,
NULL, NULL, &name, ameth);
return name;
}
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