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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 software may be distributed under the terms of the BSD license.
      6  * See README for more details.
      7  */
      8 
      9 #include "includes.h"
     10 
     11 #include "common.h"
     12 #include "crypto.h"
     13 #include "tls/rsa.h"
     14 #include "tls/pkcs1.h"
     15 #include "tls/pkcs8.h"
     16 
     17 /* Dummy structures; these are just typecast to struct crypto_rsa_key */
     18 struct crypto_public_key;
     19 struct crypto_private_key;
     20 
     21 
     22 struct crypto_public_key * crypto_public_key_import(const u8 *key, size_t len)
     23 {
     24 	return (struct crypto_public_key *)
     25 		crypto_rsa_import_public_key(key, len);
     26 }
     27 
     28 
     29 struct crypto_public_key *
     30 crypto_public_key_import_parts(const u8 *n, size_t n_len,
     31 			       const u8 *e, size_t e_len)
     32 {
     33 	return (struct crypto_public_key *)
     34 		crypto_rsa_import_public_key_parts(n, n_len, e, e_len);
     35 }
     36 
     37 
     38 struct crypto_private_key * crypto_private_key_import(const u8 *key,
     39 						      size_t len,
     40 						      const char *passwd)
     41 {
     42 	struct crypto_private_key *res;
     43 
     44 	/* First, check for possible PKCS #8 encoding */
     45 	res = pkcs8_key_import(key, len);
     46 	if (res)
     47 		return res;
     48 
     49 	if (passwd) {
     50 		/* Try to parse as encrypted PKCS #8 */
     51 		res = pkcs8_enc_key_import(key, len, passwd);
     52 		if (res)
     53 			return res;
     54 	}
     55 
     56 	/* Not PKCS#8, so try to import PKCS #1 encoded RSA private key */
     57 	wpa_printf(MSG_DEBUG, "Trying to parse PKCS #1 encoded RSA private "
     58 		   "key");
     59 	return (struct crypto_private_key *)
     60 		crypto_rsa_import_private_key(key, len);
     61 }
     62 
     63 
     64 struct crypto_public_key * crypto_public_key_from_cert(const u8 *buf,
     65 						       size_t len)
     66 {
     67 	/* No X.509 support in crypto_internal.c */
     68 	return NULL;
     69 }
     70 
     71 
     72 int crypto_public_key_encrypt_pkcs1_v15(struct crypto_public_key *key,
     73 					const u8 *in, size_t inlen,
     74 					u8 *out, size_t *outlen)
     75 {
     76 	return pkcs1_encrypt(2, (struct crypto_rsa_key *) key,
     77 			     0, in, inlen, out, outlen);
     78 }
     79 
     80 
     81 int crypto_private_key_decrypt_pkcs1_v15(struct crypto_private_key *key,
     82 					 const u8 *in, size_t inlen,
     83 					 u8 *out, size_t *outlen)
     84 {
     85 	return pkcs1_v15_private_key_decrypt((struct crypto_rsa_key *) key,
     86 					     in, inlen, out, outlen);
     87 }
     88 
     89 
     90 int crypto_private_key_sign_pkcs1(struct crypto_private_key *key,
     91 				  const u8 *in, size_t inlen,
     92 				  u8 *out, size_t *outlen)
     93 {
     94 	return pkcs1_encrypt(1, (struct crypto_rsa_key *) key,
     95 			     1, in, inlen, out, outlen);
     96 }
     97 
     98 
     99 void crypto_public_key_free(struct crypto_public_key *key)
    100 {
    101 	crypto_rsa_free((struct crypto_rsa_key *) key);
    102 }
    103 
    104 
    105 void crypto_private_key_free(struct crypto_private_key *key)
    106 {
    107 	crypto_rsa_free((struct crypto_rsa_key *) key);
    108 }
    109 
    110 
    111 int crypto_public_key_decrypt_pkcs1(struct crypto_public_key *key,
    112 				    const u8 *crypt, size_t crypt_len,
    113 				    u8 *plain, size_t *plain_len)
    114 {
    115 	return pkcs1_decrypt_public_key((struct crypto_rsa_key *) key,
    116 					crypt, crypt_len, plain, plain_len);
    117 }
    118