mkreq.c revision 205128 
1/* Certificate request creation. Demonstrates some request related
2 * operations.
3 */
4
5#include <stdio.h>
6#include <stdlib.h>
7
8#include <openssl/pem.h>
9#include <openssl/conf.h>
10#include <openssl/x509v3.h>
11#ifndef OPENSSL_NO_ENGINE
12#include <openssl/engine.h>
13#endif
14
15int mkreq(X509_REQ **x509p, EVP_PKEY **pkeyp, int bits, int serial, int days);
16int add_ext(STACK_OF(X509_REQUEST) *sk, int nid, char *value);
17
18int main(int argc, char **argv)
19	{
20	BIO *bio_err;
21	X509_REQ *req=NULL;
22	EVP_PKEY *pkey=NULL;
23
24	CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
25
26	bio_err=BIO_new_fp(stderr, BIO_NOCLOSE);
27
28	mkreq(&req,&pkey,512,0,365);
29
30	RSA_print_fp(stdout,pkey->pkey.rsa,0);
31	X509_REQ_print_fp(stdout,req);
32
33	PEM_write_X509_REQ(stdout,req);
34
35	X509_REQ_free(req);
36	EVP_PKEY_free(pkey);
37
38#ifndef OPENSSL_NO_ENGINE
39	ENGINE_cleanup();
40#endif
41	CRYPTO_cleanup_all_ex_data();
42
43	CRYPTO_mem_leaks(bio_err);
44	BIO_free(bio_err);
45	return(0);
46	}
47
48static void callback(int p, int n, void *arg)
49	{
50	char c='B';
51
52	if (p == 0) c='.';
53	if (p == 1) c='+';
54	if (p == 2) c='*';
55	if (p == 3) c='\n';
56	fputc(c,stderr);
57	}
58
59int mkreq(X509_REQ **req, EVP_PKEY **pkeyp, int bits, int serial, int days)
60	{
61	X509_REQ *x;
62	EVP_PKEY *pk;
63	RSA *rsa;
64	X509_NAME *name=NULL;
65	STACK_OF(X509_EXTENSION) *exts = NULL;
66
67	if ((pk=EVP_PKEY_new()) == NULL)
68		goto err;
69
70	if ((x=X509_REQ_new()) == NULL)
71		goto err;
72
73	rsa=RSA_generate_key(bits,RSA_F4,callback,NULL);
74	if (!EVP_PKEY_assign_RSA(pk,rsa))
75		goto err;
76
77	rsa=NULL;
78
79	X509_REQ_set_pubkey(x,pk);
80
81	name=X509_REQ_get_subject_name(x);
82
83	/* This function creates and adds the entry, working out the
84	 * correct string type and performing checks on its length.
85	 * Normally we'd check the return value for errors...
86	 */
87	X509_NAME_add_entry_by_txt(name,"C",
88				MBSTRING_ASC, "UK", -1, -1, 0);
89	X509_NAME_add_entry_by_txt(name,"CN",
90				MBSTRING_ASC, "OpenSSL Group", -1, -1, 0);
91
92#ifdef REQUEST_EXTENSIONS
93	/* Certificate requests can contain extensions, which can be used
94	 * to indicate the extensions the requestor would like added to
95	 * their certificate. CAs might ignore them however or even choke
96	 * if they are present.
97	 */
98
99	/* For request extensions they are all packed in a single attribute.
100	 * We save them in a STACK and add them all at once later...
101	 */
102
103	exts = sk_X509_EXTENSION_new_null();
104	/* Standard extenions */
105
106	add_ext(exts, NID_key_usage, "critical,digitalSignature,keyEncipherment");
107
108	/* This is a typical use for request extensions: requesting a value for
109	 * subject alternative name.
110	 */
111
112	add_ext(exts, NID_subject_alt_name, "email:steve@openssl.org");
113
114	/* Some Netscape specific extensions */
115	add_ext(exts, NID_netscape_cert_type, "client,email");
116
117
118
119#ifdef CUSTOM_EXT
120	/* Maybe even add our own extension based on existing */
121	{
122		int nid;
123		nid = OBJ_create("1.2.3.4", "MyAlias", "My Test Alias Extension");
124		X509V3_EXT_add_alias(nid, NID_netscape_comment);
125		add_ext(x, nid, "example comment alias");
126	}
127#endif
128
129	/* Now we've created the extensions we add them to the request */
130
131	X509_REQ_add_extensions(x, exts);
132
133	sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
134
135#endif
136
137	if (!X509_REQ_sign(x,pk,EVP_sha1()))
138		goto err;
139
140	*req=x;
141	*pkeyp=pk;
142	return(1);
143err:
144	return(0);
145	}
146
147/* Add extension using V3 code: we can set the config file as NULL
148 * because we wont reference any other sections.
149 */
150
151int add_ext(STACK_OF(X509_REQUEST) *sk, int nid, char *value)
152	{
153	X509_EXTENSION *ex;
154	ex = X509V3_EXT_conf_nid(NULL, NULL, nid, value);
155	if (!ex)
156		return 0;
157	sk_X509_EXTENSION_push(sk, ex);
158
159	return 1;
160	}
161
162