1 /*
2  * Crypto wrapper for internal crypto implementation - RSA parts
3  * Copyright (c) 2006-2009, Jouni Malinen <j@w1.fi>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation.
8  *
9  * Alternatively, this software may be distributed under the terms of BSD
10  * license.
11  *
12  * See README and COPYING for more details.
13  */
14 
15 #include "includes.h"
16 
17 #include "common.h"
18 #include "crypto.h"
19 #include "tls/rsa.h"
20 #include "tls/bignum.h"
21 #include "tls/pkcs1.h"
22 #include "tls/pkcs8.h"
23 
24 /* Dummy structures; these are just typecast to struct crypto_rsa_key */
25 struct crypto_public_key;
26 struct crypto_private_key;
27 
28 
29 struct crypto_public_key * crypto_public_key_import(const u8 *key, size_t len)
30 {
31 	return (struct crypto_public_key *)
32 		crypto_rsa_import_public_key(key, len);
33 }
34 
35 
36 struct crypto_private_key * crypto_private_key_import(const u8 *key,
37 						      size_t len,
38 						      const char *passwd)
39 {
40 	struct crypto_private_key *res;
41 
42 	/* First, check for possible PKCS #8 encoding */
43 	res = pkcs8_key_import(key, len);
44 	if (res)
45 		return res;
46 
47 	if (passwd) {
48 		/* Try to parse as encrypted PKCS #8 */
49 		res = pkcs8_enc_key_import(key, len, passwd);
50 		if (res)
51 			return res;
52 	}
53 
54 	/* Not PKCS#8, so try to import PKCS #1 encoded RSA private key */
55 	wpa_printf(MSG_DEBUG, "Trying to parse PKCS #1 encoded RSA private "
56 		   "key");
57 	return (struct crypto_private_key *)
58 		crypto_rsa_import_private_key(key, len);
59 }
60 
61 
62 struct crypto_public_key * crypto_public_key_from_cert(const u8 *buf,
63 						       size_t len)
64 {
65 	/* No X.509 support in crypto_internal.c */
66 	return NULL;
67 }
68 
69 
70 int crypto_public_key_encrypt_pkcs1_v15(struct crypto_public_key *key,
71 					const u8 *in, size_t inlen,
72 					u8 *out, size_t *outlen)
73 {
74 	return pkcs1_encrypt(2, (struct crypto_rsa_key *) key,
75 			     0, in, inlen, out, outlen);
76 }
77 
78 
79 int crypto_private_key_decrypt_pkcs1_v15(struct crypto_private_key *key,
80 					 const u8 *in, size_t inlen,
81 					 u8 *out, size_t *outlen)
82 {
83 	return pkcs1_v15_private_key_decrypt((struct crypto_rsa_key *) key,
84 					     in, inlen, out, outlen);
85 }
86 
87 
88 int crypto_private_key_sign_pkcs1(struct crypto_private_key *key,
89 				  const u8 *in, size_t inlen,
90 				  u8 *out, size_t *outlen)
91 {
92 	return pkcs1_encrypt(1, (struct crypto_rsa_key *) key,
93 			     1, in, inlen, out, outlen);
94 }
95 
96 
97 void crypto_public_key_free(struct crypto_public_key *key)
98 {
99 	crypto_rsa_free((struct crypto_rsa_key *) key);
100 }
101 
102 
103 void crypto_private_key_free(struct crypto_private_key *key)
104 {
105 	crypto_rsa_free((struct crypto_rsa_key *) key);
106 }
107 
108 
109 int crypto_public_key_decrypt_pkcs1(struct crypto_public_key *key,
110 				    const u8 *crypt, size_t crypt_len,
111 				    u8 *plain, size_t *plain_len)
112 {
113 	return pkcs1_decrypt_public_key((struct crypto_rsa_key *) key,
114 					crypt, crypt_len, plain, plain_len);
115 }
116