xref: /openssl/crypto/rsa/rsa_depr.c (revision 33388b44)
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 
RSA_generate_key(int bits,unsigned long e_value,void (* callback)(int,int,void *),void * cb_arg)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 }
63