+#include "X509.h"
+
+#include <openssl/ssl.h>
+#include <openssl/bio.h>
+#include <openssl/x509v3.h>
+
+X509Req::X509Req( X509_REQ* csr ) {
+ req = std::shared_ptr<X509_REQ>( csr, X509_REQ_free );
+ EVP_PKEY* pkt = X509_REQ_get_pubkey( req.get() );
+
+ if( !pkt ) {
+ throw "Error extracting public key";
+ }
+
+ pk = std::shared_ptr<EVP_PKEY>( pkt, EVP_PKEY_free );
+}
+
+int X509Req::verify() {
+ return X509_REQ_verify( req.get(), pk.get() );
+}
+
+std::shared_ptr<EVP_PKEY> X509Req::getPkey() {
+ return pk;
+}
+
+std::shared_ptr<X509Req> X509Req::parse( std::string filename ) {
+ std::shared_ptr<BIO> in = std::shared_ptr<BIO>( BIO_new_mem_buf( const_cast<char*>( filename.c_str() ), -1 ), BIO_free );
+ X509_REQ* req = PEM_read_bio_X509_REQ( in.get(), NULL, NULL, NULL );
+
+ if( !req ) {
+ throw "Error parsing CSR";
+ }
+
+ return std::shared_ptr<X509Req>( new X509Req( req ) );
+}
+
+int add_ext( std::shared_ptr<X509> issuer, std::shared_ptr<X509> subj, int nid, const 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, issuer.get(), subj.get(), NULL, NULL, 0 );
+ ex = X509V3_EXT_conf_nid( NULL, &ctx, nid, const_cast<char*>( value ) );
+
+ if( !ex ) {
+ return 0;
+ }
+
+ X509_add_ext( subj.get(), ex, -1 );
+ X509_EXTENSION_free( ex );
+
+ return 1;
+}
+
+X509Cert::X509Cert() {
+ X509* c = X509_new();
+
+ if( !c ) {
+ throw "malloc failed";
+ }
+
+ target = std::shared_ptr<X509>( c, X509_free );
+
+ if( !X509_set_version( c, 2 ) ) {
+ throw "Setting X509-version to 3 failed";
+ }
+}
+
+void X509Cert::setIssuerNameFrom( std::shared_ptr<X509> caCert ) {
+ if( !X509_set_issuer_name( target.get(), X509_get_subject_name( caCert.get() ) ) ) {
+ throw "Error setting Issuer name";
+ }
+}
+
+void X509Cert::setPubkeyFrom( std::shared_ptr<X509Req> req ) {
+ std::shared_ptr<EVP_PKEY> pktmp = req->getPkey();
+
+ if( !X509_set_pubkey( target.get(), pktmp.get() ) ) {
+ throw "Setting public key failed.";
+ }
+}
+
+void X509Cert::setSerialNumber( int num ) {
+ ASN1_INTEGER_set( target.get()->cert_info->serialNumber, num );
+}
+
+void X509Cert::setTimes( long before, long after ) {
+ X509_gmtime_adj( X509_get_notBefore( target.get() ), before );
+ X509_gmtime_adj( X509_get_notAfter( target.get() ), after );
+}
+
+void X509Cert::setExtensions( std::shared_ptr<X509> caCert ) {
+ add_ext( caCert, target, NID_basic_constraints, "critical,CA:FALSE" );
+ add_ext( caCert, target, NID_subject_key_identifier, "hash" );
+ add_ext( caCert, target, NID_authority_key_identifier, "keyid,issuer:always" );
+ add_ext( caCert, target, NID_key_usage, "critical,nonRepudiation,digitalSignature,keyEncipherment" );
+ add_ext( caCert, target, NID_ext_key_usage, "clientAuth, serverAuth" );
+ add_ext( caCert, target, NID_info_access, "OCSP;URI:http://ocsp.cacert.org" );
+ add_ext( caCert, target, NID_crl_distribution_points, "URI:http://crl.cacert.org/class3-revoke.crl" );
+}
+
+std::string X509Cert::sign( std::shared_ptr<EVP_PKEY> caKey ) {
+ if( !X509_sign( target.get(), caKey.get(), EVP_sha512() ) ) {
+ throw "Signing failed.";
+ }
+
+ X509_print_fp( stdout, target.get() );
+ std::shared_ptr<BIO> mem = std::shared_ptr<BIO>( BIO_new( BIO_s_mem() ), BIO_free );
+ PEM_write_bio_X509( mem.get(), target.get() );
+ BUF_MEM* buf;
+ BIO_get_mem_ptr( mem.get(), &buf );
+ std::string output( buf->data, buf->data + buf->length );
+ return output;
+}