1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/*
* Certificate request creation. Demonstrates some request related
* operations.
*/
#include <stdio.h>
#include <stdlib.h>
#include <openssl/pem.h>
#include <openssl/conf.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#ifndef OPENSSL_NO_ENGINE
# include <openssl/engine.h>
#endif
int mkreq(X509_REQ **x509p, EVP_PKEY **pkeyp, int bits, int serial, int days);
int add_ext(STACK_OF(X509_EXTENSION) *sk, int nid, char *value);
int main(int argc, char **argv)
{
BIO *bio_err;
X509_REQ *req = NULL;
EVP_PKEY *pkey = NULL;
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);
mkreq(&req, &pkey, 512, 0, 365);
RSA_print_fp(stdout, pkey->pkey.rsa, 0);
X509_REQ_print_fp(stdout, req);
PEM_write_X509_REQ(stdout, req);
X509_REQ_free(req);
EVP_PKEY_free(pkey);
#ifndef OPENSSL_NO_ENGINE
ENGINE_cleanup();
#endif
CRYPTO_cleanup_all_ex_data();
CRYPTO_mem_leaks(bio_err);
BIO_free(bio_err);
return (0);
}
static void callback(int p, int n, void *arg)
{
char c = 'B';
if (p == 0)
c = '.';
if (p == 1)
c = '+';
if (p == 2)
c = '*';
if (p == 3)
c = '\n';
fputc(c, stderr);
}
int mkreq(X509_REQ **req, EVP_PKEY **pkeyp, int bits, int serial, int days)
{
X509_REQ *x;
EVP_PKEY *pk;
RSA *rsa;
X509_NAME *name = NULL;
STACK_OF(X509_EXTENSION) *exts = NULL;
if ((pk = EVP_PKEY_new()) == NULL)
goto err;
if ((x = X509_REQ_new()) == NULL)
goto err;
rsa = RSA_generate_key(bits, RSA_F4, callback, NULL);
if (!EVP_PKEY_assign_RSA(pk, rsa))
goto err;
rsa = NULL;
X509_REQ_set_pubkey(x, pk);
name = X509_REQ_get_subject_name(x);
/*
* This function creates and adds the entry, working out the correct
* string type and performing checks on its length. Normally we'd check
* the return value for errors...
*/
X509_NAME_add_entry_by_txt(name, "C", MBSTRING_ASC, "UK", -1, -1, 0);
X509_NAME_add_entry_by_txt(name, "CN",
MBSTRING_ASC, "OpenSSL Group", -1, -1, 0);
#ifdef REQUEST_EXTENSIONS
/*
* Certificate requests can contain extensions, which can be used to
* indicate the extensions the requestor would like added to their
* certificate. CAs might ignore them however or even choke if they are
* present.
*/
/*
* For request extensions they are all packed in a single attribute. We
* save them in a STACK and add them all at once later...
*/
exts = sk_X509_EXTENSION_new_null();
/* Standard extenions */
add_ext(exts, NID_key_usage, "critical,digitalSignature,keyEncipherment");
/*
* This is a typical use for request extensions: requesting a value for
* subject alternative name.
*/
add_ext(exts, NID_subject_alt_name, "email:steve@openssl.org");
/* Some Netscape specific extensions */
add_ext(exts, NID_netscape_cert_type, "client,email");
# ifdef CUSTOM_EXT
/* Maybe even add our own extension based on existing */
{
int nid;
nid = OBJ_create("1.2.3.4", "MyAlias", "My Test Alias Extension");
X509V3_EXT_add_alias(nid, NID_netscape_comment);
add_ext(x, nid, "example comment alias");
}
# endif
/* Now we've created the extensions we add them to the request */
X509_REQ_add_extensions(x, exts);
sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
#endif
if (!X509_REQ_sign(x, pk, EVP_sha1()))
goto err;
*req = x;
*pkeyp = pk;
return (1);
err:
return (0);
}
/*
* Add extension using V3 code: we can set the config file as NULL because we
* wont reference any other sections.
*/
int add_ext(STACK_OF(X509_EXTENSION) *sk, int nid, char *value)
{
X509_EXTENSION *ex;
ex = X509V3_EXT_conf_nid(NULL, NULL, nid, value);
if (!ex)
return 0;
sk_X509_EXTENSION_push(sk, ex);
return 1;
}
|