mkreq.c revision 267654
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/x509.h> 11#include <openssl/x509v3.h> 12#ifndef OPENSSL_NO_ENGINE 13#include <openssl/engine.h> 14#endif 15 16int mkreq(X509_REQ **x509p, EVP_PKEY **pkeyp, int bits, int serial, int days); 17int add_ext(STACK_OF(X509_EXTENSION) *sk, int nid, char *value); 18 19int main(int argc, char **argv) 20 { 21 BIO *bio_err; 22 X509_REQ *req=NULL; 23 EVP_PKEY *pkey=NULL; 24 25 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON); 26 27 bio_err=BIO_new_fp(stderr, BIO_NOCLOSE); 28 29 mkreq(&req,&pkey,512,0,365); 30 31 RSA_print_fp(stdout,pkey->pkey.rsa,0); 32 X509_REQ_print_fp(stdout,req); 33 34 PEM_write_X509_REQ(stdout,req); 35 36 X509_REQ_free(req); 37 EVP_PKEY_free(pkey); 38 39#ifndef OPENSSL_NO_ENGINE 40 ENGINE_cleanup(); 41#endif 42 CRYPTO_cleanup_all_ex_data(); 43 44 CRYPTO_mem_leaks(bio_err); 45 BIO_free(bio_err); 46 return(0); 47 } 48 49static void callback(int p, int n, void *arg) 50 { 51 char c='B'; 52 53 if (p == 0) c='.'; 54 if (p == 1) c='+'; 55 if (p == 2) c='*'; 56 if (p == 3) c='\n'; 57 fputc(c,stderr); 58 } 59 60int mkreq(X509_REQ **req, EVP_PKEY **pkeyp, int bits, int serial, int days) 61 { 62 X509_REQ *x; 63 EVP_PKEY *pk; 64 RSA *rsa; 65 X509_NAME *name=NULL; 66 STACK_OF(X509_EXTENSION) *exts = NULL; 67 68 if ((pk=EVP_PKEY_new()) == NULL) 69 goto err; 70 71 if ((x=X509_REQ_new()) == NULL) 72 goto err; 73 74 rsa=RSA_generate_key(bits,RSA_F4,callback,NULL); 75 if (!EVP_PKEY_assign_RSA(pk,rsa)) 76 goto err; 77 78 rsa=NULL; 79 80 X509_REQ_set_pubkey(x,pk); 81 82 name=X509_REQ_get_subject_name(x); 83 84 /* This function creates and adds the entry, working out the 85 * correct string type and performing checks on its length. 86 * Normally we'd check the return value for errors... 87 */ 88 X509_NAME_add_entry_by_txt(name,"C", 89 MBSTRING_ASC, "UK", -1, -1, 0); 90 X509_NAME_add_entry_by_txt(name,"CN", 91 MBSTRING_ASC, "OpenSSL Group", -1, -1, 0); 92 93#ifdef REQUEST_EXTENSIONS 94 /* Certificate requests can contain extensions, which can be used 95 * to indicate the extensions the requestor would like added to 96 * their certificate. CAs might ignore them however or even choke 97 * if they are present. 98 */ 99 100 /* For request extensions they are all packed in a single attribute. 101 * We save them in a STACK and add them all at once later... 102 */ 103 104 exts = sk_X509_EXTENSION_new_null(); 105 /* Standard extenions */ 106 107 add_ext(exts, NID_key_usage, "critical,digitalSignature,keyEncipherment"); 108 109 /* This is a typical use for request extensions: requesting a value for 110 * subject alternative name. 111 */ 112 113 add_ext(exts, NID_subject_alt_name, "email:steve@openssl.org"); 114 115 /* Some Netscape specific extensions */ 116 add_ext(exts, NID_netscape_cert_type, "client,email"); 117 118 119 120#ifdef CUSTOM_EXT 121 /* Maybe even add our own extension based on existing */ 122 { 123 int nid; 124 nid = OBJ_create("1.2.3.4", "MyAlias", "My Test Alias Extension"); 125 X509V3_EXT_add_alias(nid, NID_netscape_comment); 126 add_ext(x, nid, "example comment alias"); 127 } 128#endif 129 130 /* Now we've created the extensions we add them to the request */ 131 132 X509_REQ_add_extensions(x, exts); 133 134 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free); 135 136#endif 137 138 if (!X509_REQ_sign(x,pk,EVP_sha1())) 139 goto err; 140 141 *req=x; 142 *pkeyp=pk; 143 return(1); 144err: 145 return(0); 146 } 147 148/* Add extension using V3 code: we can set the config file as NULL 149 * because we wont reference any other sections. 150 */ 151 152int add_ext(STACK_OF(X509_EXTENSION) *sk, int nid, char *value) 153 { 154 X509_EXTENSION *ex; 155 ex = X509V3_EXT_conf_nid(NULL, NULL, nid, value); 156 if (!ex) 157 return 0; 158 sk_X509_EXTENSION_push(sk, ex); 159 160 return 1; 161 } 162 163