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      1 /*
      2  * Crypto wrapper for internal crypto implementation - RSA parts
      3  * Copyright (c) 2006-2009, Jouni Malinen <j (at) 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