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 15 int mkreq(X509_REQ **x509p, EVP_PKEY **pkeyp, int bits, int serial, int days); 16 int add_ext(STACK_OF(X509_REQUEST) *sk, int nid, char *value); 17 18 int 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 48 static 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 59 int 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); 143 err: 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 */ 150 151 int 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