1 /*
2 * Copyright 1999-2025 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 <stdio.h>
11 #include "internal/cryptlib.h"
12 #include <openssl/asn1t.h>
13 #include <openssl/x509.h>
14 #include "crypto/x509.h"
15
16 /* Minor tweak to operation: zero private key data */
pkey_cb(int operation,ASN1_VALUE ** pval,const ASN1_ITEM * it,void * exarg)17 static int pkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
18 void *exarg)
19 {
20 PKCS8_PRIV_KEY_INFO *key;
21 int version;
22
23 switch (operation) {
24 case ASN1_OP_FREE_PRE:
25 /* The structure is still valid during ASN1_OP_FREE_PRE */
26 key = (PKCS8_PRIV_KEY_INFO *)*pval;
27 if (key->pkey)
28 OPENSSL_cleanse(key->pkey->data, key->pkey->length);
29 break;
30 case ASN1_OP_D2I_POST:
31 /* Insist on a valid version now that the structure is decoded */
32 key = (PKCS8_PRIV_KEY_INFO *)*pval;
33 version = ASN1_INTEGER_get(key->version);
34 if (version < 0 || version > 1)
35 return 0;
36 if (version == 0 && key->kpub != NULL)
37 return 0;
38 break;
39 }
40 return 1;
41 }
42
43 ASN1_SEQUENCE_cb(PKCS8_PRIV_KEY_INFO, pkey_cb) = {
44 ASN1_SIMPLE(PKCS8_PRIV_KEY_INFO, version, ASN1_INTEGER),
45 ASN1_SIMPLE(PKCS8_PRIV_KEY_INFO, pkeyalg, X509_ALGOR),
46 ASN1_SIMPLE(PKCS8_PRIV_KEY_INFO, pkey, ASN1_OCTET_STRING),
47 ASN1_IMP_SET_OF_OPT(PKCS8_PRIV_KEY_INFO, attributes, X509_ATTRIBUTE, 0),
48 ASN1_IMP_OPT(PKCS8_PRIV_KEY_INFO, kpub, ASN1_BIT_STRING, 1)
49 } ASN1_SEQUENCE_END_cb(PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO)
50
51 IMPLEMENT_ASN1_FUNCTIONS(PKCS8_PRIV_KEY_INFO)
52
53 int PKCS8_pkey_set0(PKCS8_PRIV_KEY_INFO *priv, ASN1_OBJECT *aobj,
54 int version,
55 int ptype, void *pval, unsigned char *penc, int penclen)
56 {
57 if (version >= 0) {
58 /* We only support PKCS#8 v1 (0) and v2 (1). */
59 if (version > 1)
60 return 0;
61 if (!ASN1_INTEGER_set(priv->version, version))
62 return 0;
63 }
64 if (!X509_ALGOR_set0(priv->pkeyalg, aobj, ptype, pval))
65 return 0;
66 if (penc)
67 ASN1_STRING_set0(priv->pkey, penc, penclen);
68 return 1;
69 }
70
PKCS8_pkey_get0(const ASN1_OBJECT ** ppkalg,const unsigned char ** pk,int * ppklen,const X509_ALGOR ** pa,const PKCS8_PRIV_KEY_INFO * p8)71 int PKCS8_pkey_get0(const ASN1_OBJECT **ppkalg,
72 const unsigned char **pk, int *ppklen,
73 const X509_ALGOR **pa, const PKCS8_PRIV_KEY_INFO *p8)
74 {
75 if (ppkalg)
76 *ppkalg = p8->pkeyalg->algorithm;
77 if (pk) {
78 *pk = ASN1_STRING_get0_data(p8->pkey);
79 *ppklen = ASN1_STRING_length(p8->pkey);
80 }
81 if (pa)
82 *pa = p8->pkeyalg;
83 return 1;
84 }
85
STACK_OF(X509_ATTRIBUTE)86 const STACK_OF(X509_ATTRIBUTE) *
87 PKCS8_pkey_get0_attrs(const PKCS8_PRIV_KEY_INFO *p8)
88 {
89 return p8->attributes;
90 }
91
PKCS8_pkey_add1_attr_by_NID(PKCS8_PRIV_KEY_INFO * p8,int nid,int type,const unsigned char * bytes,int len)92 int PKCS8_pkey_add1_attr_by_NID(PKCS8_PRIV_KEY_INFO *p8, int nid, int type,
93 const unsigned char *bytes, int len)
94 {
95 if (X509at_add1_attr_by_NID(&p8->attributes, nid, type, bytes, len) != NULL)
96 return 1;
97 return 0;
98 }
99
PKCS8_pkey_add1_attr_by_OBJ(PKCS8_PRIV_KEY_INFO * p8,const ASN1_OBJECT * obj,int type,const unsigned char * bytes,int len)100 int PKCS8_pkey_add1_attr_by_OBJ(PKCS8_PRIV_KEY_INFO *p8, const ASN1_OBJECT *obj, int type,
101 const unsigned char *bytes, int len)
102 {
103 return (X509at_add1_attr_by_OBJ(&p8->attributes, obj, type, bytes, len) != NULL);
104 }
105
PKCS8_pkey_add1_attr(PKCS8_PRIV_KEY_INFO * p8,X509_ATTRIBUTE * attr)106 int PKCS8_pkey_add1_attr(PKCS8_PRIV_KEY_INFO *p8, X509_ATTRIBUTE *attr)
107 {
108 return (X509at_add1_attr(&p8->attributes, attr) != NULL);
109 }
110