1 /*
2  * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the OpenSSL license (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/pkcs12.h>
13 #include "p12_local.h"
14 
15 /* Pack an object into an OCTET STRING and turn into a safebag */
16 
PKCS12_item_pack_safebag(void * obj,const ASN1_ITEM * it,int nid1,int nid2)17 PKCS12_SAFEBAG *PKCS12_item_pack_safebag(void *obj, const ASN1_ITEM *it,
18                                          int nid1, int nid2)
19 {
20     PKCS12_BAGS *bag;
21     PKCS12_SAFEBAG *safebag;
22 
23     if ((bag = PKCS12_BAGS_new()) == NULL) {
24         PKCS12err(PKCS12_F_PKCS12_ITEM_PACK_SAFEBAG, ERR_R_MALLOC_FAILURE);
25         return NULL;
26     }
27     bag->type = OBJ_nid2obj(nid1);
28     if (!ASN1_item_pack(obj, it, &bag->value.octet)) {
29         PKCS12err(PKCS12_F_PKCS12_ITEM_PACK_SAFEBAG, ERR_R_MALLOC_FAILURE);
30         goto err;
31     }
32     if ((safebag = PKCS12_SAFEBAG_new()) == NULL) {
33         PKCS12err(PKCS12_F_PKCS12_ITEM_PACK_SAFEBAG, ERR_R_MALLOC_FAILURE);
34         goto err;
35     }
36     safebag->value.bag = bag;
37     safebag->type = OBJ_nid2obj(nid2);
38     return safebag;
39 
40  err:
41     PKCS12_BAGS_free(bag);
42     return NULL;
43 }
44 
45 /* Turn a stack of SAFEBAGS into a PKCS#7 data Contentinfo */
PKCS12_pack_p7data(STACK_OF (PKCS12_SAFEBAG)* sk)46 PKCS7 *PKCS12_pack_p7data(STACK_OF(PKCS12_SAFEBAG) *sk)
47 {
48     PKCS7 *p7;
49 
50     if ((p7 = PKCS7_new()) == NULL) {
51         PKCS12err(PKCS12_F_PKCS12_PACK_P7DATA, ERR_R_MALLOC_FAILURE);
52         return NULL;
53     }
54     p7->type = OBJ_nid2obj(NID_pkcs7_data);
55     if ((p7->d.data = ASN1_OCTET_STRING_new()) == NULL) {
56         PKCS12err(PKCS12_F_PKCS12_PACK_P7DATA, ERR_R_MALLOC_FAILURE);
57         goto err;
58     }
59 
60     if (!ASN1_item_pack(sk, ASN1_ITEM_rptr(PKCS12_SAFEBAGS), &p7->d.data)) {
61         PKCS12err(PKCS12_F_PKCS12_PACK_P7DATA, PKCS12_R_CANT_PACK_STRUCTURE);
62         goto err;
63     }
64     return p7;
65 
66  err:
67     PKCS7_free(p7);
68     return NULL;
69 }
70 
71 /* Unpack SAFEBAGS from PKCS#7 data ContentInfo */
STACK_OF(PKCS12_SAFEBAG)72 STACK_OF(PKCS12_SAFEBAG) *PKCS12_unpack_p7data(PKCS7 *p7)
73 {
74     if (!PKCS7_type_is_data(p7)) {
75         PKCS12err(PKCS12_F_PKCS12_UNPACK_P7DATA,
76                   PKCS12_R_CONTENT_TYPE_NOT_DATA);
77         return NULL;
78     }
79     return ASN1_item_unpack(p7->d.data, ASN1_ITEM_rptr(PKCS12_SAFEBAGS));
80 }
81 
82 /* Turn a stack of SAFEBAGS into a PKCS#7 encrypted data ContentInfo */
83 
PKCS12_pack_p7encdata(int pbe_nid,const char * pass,int passlen,unsigned char * salt,int saltlen,int iter,STACK_OF (PKCS12_SAFEBAG)* bags)84 PKCS7 *PKCS12_pack_p7encdata(int pbe_nid, const char *pass, int passlen,
85                              unsigned char *salt, int saltlen, int iter,
86                              STACK_OF(PKCS12_SAFEBAG) *bags)
87 {
88     PKCS7 *p7;
89     X509_ALGOR *pbe;
90     const EVP_CIPHER *pbe_ciph;
91 
92     if ((p7 = PKCS7_new()) == NULL) {
93         PKCS12err(PKCS12_F_PKCS12_PACK_P7ENCDATA, ERR_R_MALLOC_FAILURE);
94         return NULL;
95     }
96     if (!PKCS7_set_type(p7, NID_pkcs7_encrypted)) {
97         PKCS12err(PKCS12_F_PKCS12_PACK_P7ENCDATA,
98                   PKCS12_R_ERROR_SETTING_ENCRYPTED_DATA_TYPE);
99         goto err;
100     }
101 
102     pbe_ciph = EVP_get_cipherbynid(pbe_nid);
103 
104     if (pbe_ciph)
105         pbe = PKCS5_pbe2_set(pbe_ciph, iter, salt, saltlen);
106     else
107         pbe = PKCS5_pbe_set(pbe_nid, iter, salt, saltlen);
108 
109     if (!pbe) {
110         PKCS12err(PKCS12_F_PKCS12_PACK_P7ENCDATA, ERR_R_MALLOC_FAILURE);
111         goto err;
112     }
113     X509_ALGOR_free(p7->d.encrypted->enc_data->algorithm);
114     p7->d.encrypted->enc_data->algorithm = pbe;
115     ASN1_OCTET_STRING_free(p7->d.encrypted->enc_data->enc_data);
116     if (!(p7->d.encrypted->enc_data->enc_data =
117           PKCS12_item_i2d_encrypt(pbe, ASN1_ITEM_rptr(PKCS12_SAFEBAGS), pass,
118                                   passlen, bags, 1))) {
119         PKCS12err(PKCS12_F_PKCS12_PACK_P7ENCDATA, PKCS12_R_ENCRYPT_ERROR);
120         goto err;
121     }
122 
123     return p7;
124 
125  err:
126     PKCS7_free(p7);
127     return NULL;
128 }
129 
STACK_OF(PKCS12_SAFEBAG)130 STACK_OF(PKCS12_SAFEBAG) *PKCS12_unpack_p7encdata(PKCS7 *p7, const char *pass,
131                                                   int passlen)
132 {
133     if (!PKCS7_type_is_encrypted(p7))
134         return NULL;
135     return PKCS12_item_decrypt_d2i(p7->d.encrypted->enc_data->algorithm,
136                                    ASN1_ITEM_rptr(PKCS12_SAFEBAGS),
137                                    pass, passlen,
138                                    p7->d.encrypted->enc_data->enc_data, 1);
139 }
140 
PKCS12_decrypt_skey(const PKCS12_SAFEBAG * bag,const char * pass,int passlen)141 PKCS8_PRIV_KEY_INFO *PKCS12_decrypt_skey(const PKCS12_SAFEBAG *bag,
142                                          const char *pass, int passlen)
143 {
144     return PKCS8_decrypt(bag->value.shkeybag, pass, passlen);
145 }
146 
PKCS12_pack_authsafes(PKCS12 * p12,STACK_OF (PKCS7)* safes)147 int PKCS12_pack_authsafes(PKCS12 *p12, STACK_OF(PKCS7) *safes)
148 {
149     if (ASN1_item_pack(safes, ASN1_ITEM_rptr(PKCS12_AUTHSAFES),
150                        &p12->authsafes->d.data))
151         return 1;
152     return 0;
153 }
154 
STACK_OF(PKCS7)155 STACK_OF(PKCS7) *PKCS12_unpack_authsafes(const PKCS12 *p12)
156 {
157     if (!PKCS7_type_is_data(p12->authsafes)) {
158         PKCS12err(PKCS12_F_PKCS12_UNPACK_AUTHSAFES,
159                   PKCS12_R_CONTENT_TYPE_NOT_DATA);
160         return NULL;
161     }
162     return ASN1_item_unpack(p12->authsafes->d.data,
163                             ASN1_ITEM_rptr(PKCS12_AUTHSAFES));
164 }
165