/* Certificate creation. Demonstrates some certificate related * operations. */ #include #include #include #include #include #ifndef OPENSSL_NO_ENGINE #include #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_md5())) 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; }