158 lines
3.4 KiB
C
158 lines
3.4 KiB
C
/* Certificate request creation. Demonstrates some request related
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* operations.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <openssl/pem.h>
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#include <openssl/conf.h>
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#include <openssl/x509v3.h>
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#include <openssl/engine.h>
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int mkreq(X509_REQ **x509p, EVP_PKEY **pkeyp, int bits, int serial, int days);
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int add_ext(STACK_OF(X509_REQUEST) *sk, int nid, char *value);
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int main(int argc, char **argv)
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{
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BIO *bio_err;
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X509_REQ *req=NULL;
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EVP_PKEY *pkey=NULL;
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CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
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bio_err=BIO_new_fp(stderr, BIO_NOCLOSE);
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mkreq(&req,&pkey,512,0,365);
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RSA_print_fp(stdout,pkey->pkey.rsa,0);
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X509_REQ_print_fp(stdout,req);
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PEM_write_X509_REQ(stdout,req);
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X509_REQ_free(req);
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EVP_PKEY_free(pkey);
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ENGINE_cleanup();
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CRYPTO_cleanup_all_ex_data();
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CRYPTO_mem_leaks(bio_err);
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BIO_free(bio_err);
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return(0);
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}
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static void callback(int p, int n, void *arg)
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{
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char c='B';
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if (p == 0) c='.';
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if (p == 1) c='+';
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if (p == 2) c='*';
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if (p == 3) c='\n';
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fputc(c,stderr);
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}
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int mkreq(X509_REQ **req, EVP_PKEY **pkeyp, int bits, int serial, int days)
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{
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X509_REQ *x;
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EVP_PKEY *pk;
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RSA *rsa;
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X509_NAME *name=NULL;
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STACK_OF(X509_EXTENSION) *exts = NULL;
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if ((pk=EVP_PKEY_new()) == NULL)
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goto err;
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if ((x=X509_REQ_new()) == NULL)
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goto err;
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rsa=RSA_generate_key(bits,RSA_F4,callback,NULL);
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if (!EVP_PKEY_assign_RSA(pk,rsa))
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goto err;
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rsa=NULL;
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X509_REQ_set_pubkey(x,pk);
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name=X509_REQ_get_subject_name(x);
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/* This function creates and adds the entry, working out the
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* correct string type and performing checks on its length.
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* Normally we'd check the return value for errors...
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*/
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X509_NAME_add_entry_by_txt(name,"C",
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MBSTRING_ASC, "UK", -1, -1, 0);
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X509_NAME_add_entry_by_txt(name,"CN",
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MBSTRING_ASC, "OpenSSL Group", -1, -1, 0);
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#ifdef REQUEST_EXTENSIONS
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/* Certificate requests can contain extensions, which can be used
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* to indicate the extensions the requestor would like added to
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* their certificate. CAs might ignore them however or even choke
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* if they are present.
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*/
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/* For request extensions they are all packed in a single attribute.
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* We save them in a STACK and add them all at once later...
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*/
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exts = sk_X509_EXTENSION_new_null();
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/* Standard extenions */
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add_ext(exts, NID_key_usage, "critical,digitalSignature,keyEncipherment");
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/* This is a typical use for request extensions: requesting a value for
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* subject alternative name.
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*/
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add_ext(exts, NID_subject_alt_name, "email:steve@openssl.org");
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/* Some Netscape specific extensions */
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add_ext(exts, NID_netscape_cert_type, "client,email");
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#ifdef CUSTOM_EXT
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/* Maybe even add our own extension based on existing */
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{
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int nid;
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nid = OBJ_create("1.2.3.4", "MyAlias", "My Test Alias Extension");
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X509V3_EXT_add_alias(nid, NID_netscape_comment);
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add_ext(x, nid, "example comment alias");
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}
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#endif
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/* Now we've created the extensions we add them to the request */
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X509_REQ_add_extensions(x, exts);
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sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
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#endif
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if (!X509_REQ_sign(x,pk,EVP_md5()))
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goto err;
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*req=x;
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*pkeyp=pk;
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return(1);
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err:
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return(0);
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}
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/* Add extension using V3 code: we can set the config file as NULL
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* because we wont reference any other sections.
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*/
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int add_ext(STACK_OF(X509_REQUEST) *sk, int nid, char *value)
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{
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X509_EXTENSION *ex;
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ex = X509V3_EXT_conf_nid(NULL, NULL, nid, value);
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if (!ex)
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return 0;
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sk_X509_EXTENSION_push(sk, ex);
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return 1;
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}
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