crypto/rsa/rsa_depr.c

   1 /*
   2  * Copyright 2002-2020 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 /*
  11  * NB: This file contains deprecated functions (compatibility wrappers to the
  12  * "new" versions).
  13  */
  14
  15 /*
  16  * RSA low level APIs are deprecated for public use, but still ok for
  17  * internal use.
  18  */
  19 #include "internal/deprecated.h"
  20
  21 #include <openssl/opensslconf.h>
  22
  23 #include <stdio.h>
  24 #include <time.h>
  25 #include "internal/cryptlib.h"
  26 #include <openssl/bn.h>
  27 #include <openssl/rsa.h>
  28
  29 RSA *RSA_generate_key(int bits, unsigned long e_value,
  30                       void (*callback) (int, int, void *), void *cb_arg)
  31 {
  32     int i;
  33     BN_GENCB *cb = BN_GENCB_new();
  34     RSA *rsa = RSA_new();
  35     BIGNUM *e = BN_new();
  36
  37     if (cb == NULL || rsa == NULL || e == NULL)
  38         goto err;
  39
  40     /*
  41      * The problem is when building with 8, 16, or 32 BN_ULONG, unsigned long
  42      * can be larger
  43      */
  44     for (i = 0; i < (int)sizeof(unsigned long) * 8; i++) {
  45         if (e_value & (1UL << i))
  46             if (BN_set_bit(e, i) == 0)
  47                 goto err;
  48     }
  49
  50     BN_GENCB_set_old(cb, callback, cb_arg);
  51
  52     if (RSA_generate_key_ex(rsa, bits, e, cb)) {
  53         BN_free(e);
  54         BN_GENCB_free(cb);
  55         return rsa;
  56     }
  57  err:
  58     BN_free(e);
  59     RSA_free(rsa);
  60     BN_GENCB_free(cb);
  61     return 0;
  62 }