1 /*
2 * Copyright 1999-2021 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/pkcs12.h>
13 #include <openssl/trace.h>
14
15 /*
16 * Encrypt/Decrypt a buffer based on password and algor, result in a
17 * OPENSSL_malloc'ed buffer
18 */
PKCS12_pbe_crypt_ex(const X509_ALGOR * algor,const char * pass,int passlen,const unsigned char * in,int inlen,unsigned char ** data,int * datalen,int en_de,OSSL_LIB_CTX * libctx,const char * propq)19 unsigned char *PKCS12_pbe_crypt_ex(const X509_ALGOR *algor,
20 const char *pass, int passlen,
21 const unsigned char *in, int inlen,
22 unsigned char **data, int *datalen, int en_de,
23 OSSL_LIB_CTX *libctx, const char *propq)
24 {
25 unsigned char *out = NULL;
26 int outlen, i;
27 EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new();
28 int max_out_len, mac_len = 0;
29
30 if (ctx == NULL) {
31 ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);
32 goto err;
33 }
34
35 /* Process data */
36 if (!EVP_PBE_CipherInit_ex(algor->algorithm, pass, passlen,
37 algor->parameter, ctx, en_de, libctx, propq))
38 goto err;
39
40 /*
41 * GOST algorithm specifics:
42 * OMAC algorithm calculate and encrypt MAC of the encrypted objects
43 * It's appended to encrypted text on encrypting
44 * MAC should be processed on decrypting separately from plain text
45 */
46 max_out_len = inlen + EVP_CIPHER_CTX_get_block_size(ctx);
47 if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx))
48 & EVP_CIPH_FLAG_CIPHER_WITH_MAC) != 0) {
49 if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_TLS1_AAD, 0, &mac_len) < 0) {
50 ERR_raise(ERR_LIB_PKCS12, ERR_R_INTERNAL_ERROR);
51 goto err;
52 }
53
54 if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
55 max_out_len += mac_len;
56 } else {
57 if (inlen < mac_len) {
58 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_UNSUPPORTED_PKCS12_MODE);
59 goto err;
60 }
61 inlen -= mac_len;
62 if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG,
63 (int)mac_len, (unsigned char *)in+inlen) < 0) {
64 ERR_raise(ERR_LIB_PKCS12, ERR_R_INTERNAL_ERROR);
65 goto err;
66 }
67 }
68 }
69
70 if ((out = OPENSSL_malloc(max_out_len)) == NULL) {
71 ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);
72 goto err;
73 }
74
75 if (!EVP_CipherUpdate(ctx, out, &i, in, inlen)) {
76 OPENSSL_free(out);
77 out = NULL;
78 ERR_raise(ERR_LIB_PKCS12, ERR_R_EVP_LIB);
79 goto err;
80 }
81
82 outlen = i;
83 if (!EVP_CipherFinal_ex(ctx, out + i, &i)) {
84 OPENSSL_free(out);
85 out = NULL;
86 ERR_raise_data(ERR_LIB_PKCS12, PKCS12_R_PKCS12_CIPHERFINAL_ERROR,
87 passlen == 0 ? "empty password"
88 : "maybe wrong password");
89 goto err;
90 }
91 outlen += i;
92 if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx))
93 & EVP_CIPH_FLAG_CIPHER_WITH_MAC) != 0) {
94 if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
95 if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG,
96 (int)mac_len, out+outlen) < 0) {
97 OPENSSL_free(out);
98 out = NULL;
99 ERR_raise(ERR_LIB_PKCS12, ERR_R_INTERNAL_ERROR);
100 goto err;
101 }
102 outlen += mac_len;
103 }
104 }
105 if (datalen)
106 *datalen = outlen;
107 if (data)
108 *data = out;
109 err:
110 EVP_CIPHER_CTX_free(ctx);
111 return out;
112
113 }
114
PKCS12_pbe_crypt(const X509_ALGOR * algor,const char * pass,int passlen,const unsigned char * in,int inlen,unsigned char ** data,int * datalen,int en_de)115 unsigned char *PKCS12_pbe_crypt(const X509_ALGOR *algor,
116 const char *pass, int passlen,
117 const unsigned char *in, int inlen,
118 unsigned char **data, int *datalen, int en_de)
119 {
120 return PKCS12_pbe_crypt_ex(algor, pass, passlen, in, inlen, data, datalen,
121 en_de, NULL, NULL);
122 }
123
124 /*
125 * Decrypt an OCTET STRING and decode ASN1 structure if zbuf set zero buffer
126 * after use.
127 */
128
PKCS12_item_decrypt_d2i_ex(const X509_ALGOR * algor,const ASN1_ITEM * it,const char * pass,int passlen,const ASN1_OCTET_STRING * oct,int zbuf,OSSL_LIB_CTX * libctx,const char * propq)129 void *PKCS12_item_decrypt_d2i_ex(const X509_ALGOR *algor, const ASN1_ITEM *it,
130 const char *pass, int passlen,
131 const ASN1_OCTET_STRING *oct, int zbuf,
132 OSSL_LIB_CTX *libctx,
133 const char *propq)
134 {
135 unsigned char *out = NULL;
136 const unsigned char *p;
137 void *ret;
138 int outlen = 0;
139
140 if (!PKCS12_pbe_crypt_ex(algor, pass, passlen, oct->data, oct->length,
141 &out, &outlen, 0, libctx, propq))
142 return NULL;
143 p = out;
144 OSSL_TRACE_BEGIN(PKCS12_DECRYPT) {
145 BIO_printf(trc_out, "\n");
146 BIO_dump(trc_out, out, outlen);
147 BIO_printf(trc_out, "\n");
148 } OSSL_TRACE_END(PKCS12_DECRYPT);
149 ret = ASN1_item_d2i(NULL, &p, outlen, it);
150 if (zbuf)
151 OPENSSL_cleanse(out, outlen);
152 if (!ret)
153 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_DECODE_ERROR);
154 OPENSSL_free(out);
155 return ret;
156 }
157
PKCS12_item_decrypt_d2i(const X509_ALGOR * algor,const ASN1_ITEM * it,const char * pass,int passlen,const ASN1_OCTET_STRING * oct,int zbuf)158 void *PKCS12_item_decrypt_d2i(const X509_ALGOR *algor, const ASN1_ITEM *it,
159 const char *pass, int passlen,
160 const ASN1_OCTET_STRING *oct, int zbuf)
161 {
162 return PKCS12_item_decrypt_d2i_ex(algor, it, pass, passlen, oct, zbuf,
163 NULL, NULL);
164 }
165
166 /*
167 * Encode ASN1 structure and encrypt, return OCTET STRING if zbuf set zero
168 * encoding.
169 */
170
PKCS12_item_i2d_encrypt_ex(X509_ALGOR * algor,const ASN1_ITEM * it,const char * pass,int passlen,void * obj,int zbuf,OSSL_LIB_CTX * ctx,const char * propq)171 ASN1_OCTET_STRING *PKCS12_item_i2d_encrypt_ex(X509_ALGOR *algor,
172 const ASN1_ITEM *it,
173 const char *pass, int passlen,
174 void *obj, int zbuf,
175 OSSL_LIB_CTX *ctx,
176 const char *propq)
177 {
178 ASN1_OCTET_STRING *oct = NULL;
179 unsigned char *in = NULL;
180 int inlen;
181
182 if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
183 ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);
184 goto err;
185 }
186 inlen = ASN1_item_i2d(obj, &in, it);
187 if (!in) {
188 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_ENCODE_ERROR);
189 goto err;
190 }
191 if (!PKCS12_pbe_crypt_ex(algor, pass, passlen, in, inlen, &oct->data,
192 &oct->length, 1, ctx, propq)) {
193 ERR_raise(ERR_LIB_PKCS12, PKCS12_R_ENCRYPT_ERROR);
194 OPENSSL_free(in);
195 goto err;
196 }
197 if (zbuf)
198 OPENSSL_cleanse(in, inlen);
199 OPENSSL_free(in);
200 return oct;
201 err:
202 ASN1_OCTET_STRING_free(oct);
203 return NULL;
204 }
205
PKCS12_item_i2d_encrypt(X509_ALGOR * algor,const ASN1_ITEM * it,const char * pass,int passlen,void * obj,int zbuf)206 ASN1_OCTET_STRING *PKCS12_item_i2d_encrypt(X509_ALGOR *algor,
207 const ASN1_ITEM *it,
208 const char *pass, int passlen,
209 void *obj, int zbuf)
210 {
211 return PKCS12_item_i2d_encrypt_ex(algor, it, pass, passlen, obj, zbuf, NULL, NULL);
212 }
213
