src/crypto/crypto_internal-rsa.c

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