aboutsummaryrefslogtreecommitdiffstats
path: root/demos/x509/mkcert.c
blob: 6a52e5d0fc4af087e480e3683085d08af8f23e2a (plain) (blame)
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
169
170
171
172
/* Certificate creation. Demonstrates some certificate related
 * operations.
 */


#include <stdio.h>
#include <stdlib.h>

#include <openssl/pem.h>
#include <openssl/conf.h>
#include <openssl/x509v3.h>
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif

int mkcert(X509 **x509p, EVP_PKEY **pkeyp, int bits, int serial, int days);
int add_ext(X509 *cert, int nid, char *value);

int main(int argc, char **argv)
	{
	BIO *bio_err;
	X509 *x509=NULL;
	EVP_PKEY *pkey=NULL;

	CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);

	bio_err=BIO_new_fp(stderr, BIO_NOCLOSE);

	mkcert(&x509,&pkey,512,0,365);

	RSA_print_fp(stdout,pkey->pkey.rsa,0);
	X509_print_fp(stdout,x509);

	PEM_write_PrivateKey(stdout,pkey,NULL,NULL,0,NULL, NULL);
	PEM_write_X509(stdout,x509);

	X509_free(x509);
	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 mkcert(X509 **x509p, EVP_PKEY **pkeyp, int bits, int serial, int days)
	{
	X509 *x;
	EVP_PKEY *pk;
	RSA *rsa;
	X509_NAME *name=NULL;
	
	if ((pkeyp == NULL) || (*pkeyp == NULL))
		{
		if ((pk=EVP_PKEY_new()) == NULL)
			{
			abort(); 
			return(0);
			}
		}
	else
		pk= *pkeyp;

	if ((x509p == NULL) || (*x509p == NULL))
		{
		if ((x=X509_new()) == NULL)
			goto err;
		}
	else
		x= *x509p;

	rsa=RSA_generate_key(bits,RSA_F4,callback,NULL);
	if (!EVP_PKEY_assign_RSA(pk,rsa))
		{
		abort();
		goto err;
		}
	rsa=NULL;

	X509_set_version(x,2);
	ASN1_INTEGER_set(X509_get_serialNumber(x),serial);
	X509_gmtime_adj(X509_get_notBefore(x),0);
	X509_gmtime_adj(X509_get_notAfter(x),(long)60*60*24*days);
	X509_set_pubkey(x,pk);

	name=X509_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);

	/* Its self signed so set the issuer name to be the same as the
 	 * subject.
	 */
	X509_set_issuer_name(x,name);

	/* Add various extensions: standard extensions */
	add_ext(x, NID_basic_constraints, "critical,CA:TRUE");
	add_ext(x, NID_key_usage, "critical,keyCertSign,cRLSign");

	add_ext(x, NID_subject_key_identifier, "hash");

	/* Some Netscape specific extensions */
	add_ext(x, NID_netscape_cert_type, "sslCA");

	add_ext(x, NID_netscape_comment, "example comment extension");


#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
	
	if (!X509_sign(x,pk,EVP_sha1()))
		goto err;

	*x509p=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(X509 *cert, int nid, char *value)
	{
	X509_EXTENSION *ex;
	X509V3_CTX ctx;
	/* This sets the 'context' of the extensions. */
	/* No configuration database */
	X509V3_set_ctx_nodb(&ctx);
	/* Issuer and subject certs: both the target since it is self signed,
	 * no request and no CRL
	 */
	X509V3_set_ctx(&ctx, cert, cert, NULL, NULL, 0);
	ex = X509V3_EXT_conf_nid(NULL, &ctx, nid, value);
	if (!ex)
		return 0;

	X509_add_ext(cert,ex,-1);
	X509_EXTENSION_free(ex);
	return 1;
	}