support of PKCS#10 certificate request parsing

src/libstrongswan/Makefile.am

@@ -32,6 +32,7 @@ credentials/certificates/certificate.c credentials/certificates/certificate.h \
 credentials/certificates/x509.h credentials/certificates/x509.c \
 credentials/certificates/ac.h \
 credentials/certificates/crl.h credentials/certificates/crl.c \
+credentials/certificates/pkcs10.h \
 credentials/certificates/ocsp_request.h \
 credentials/certificates/ocsp_response.h credentials/certificates/ocsp_response.c \
 database/database.h database/database_factory.h database/database_factory.c \

src/libstrongswan/credentials/certificates/certificate.c

@@ -24,6 +24,7 @@ ENUM(certificate_type_names, CERT_ANY, CERT_PLUTO_CRL,
 	"X509_OCSP_REQUEST",
 	"X509_OCSP_RESPONSE",
 	"X509_AC",
+	"PKCS10_REQUEST",
 	"TRUSTED_PUBKEY",
 	"PGP",
 	"PLUTO_CERT",

src/libstrongswan/credentials/certificates/certificate.h

@@ -45,6 +45,8 @@ enum certificate_type_t {
 	CERT_X509_OCSP_RESPONSE,
 	/** X.509 attribute certificate */
 	CERT_X509_AC,
+	/** PKCS#10 certificate request */
+	CERT_PKCS10_REQUEST,
 	/** trusted, preinstalled public key */
 	CERT_TRUSTED_PUBKEY,
 	/** PGP certificate */
@@ -96,7 +98,7 @@ struct certificate_t {
 	/**
 	 * Get the type of the certificate.
 	 *
-	 * @return			certifcate type
+	 * @return			certificate type
 	 */
 	certificate_type_t (*get_type)(certificate_t *this);
 

src/libstrongswan/credentials/certificates/pkcs10.h

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2009 Andreas Steffen
+ * HSR Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup req req
+ * @{ @ingroup certificates
+ */
+
+#ifndef PKCS10_H_
+#define PKCS10_H_
+
+#include <utils/enumerator.h>
+#include <credentials/certificates/certificate.h>
+
+typedef struct pkcs10_t pkcs10_t;
+
+/**
+ * PKCS#10 certificate request interface.
+ *
+ * This interface adds additional methods to the certificate_t type to
+ * allow further operations on a certificate request.
+ */
+struct pkcs10_t {
+
+	/**
+	 * Implements certificate_t.
+	 */
+	certificate_t interface;
+
+	/**
+	 * Get the challenge password
+	 *
+	 * @return			challenge password as a chunk_t
+	 */
+	chunk_t (*get_challengePassword)(pkcs10_t *this);
+
+	/**
+	 * Get.
+	 *
+	 * @return			enumerator over subjectAltNames as identification_t*
+	 */
+	enumerator_t* (*create_subjectAltName_enumerator)(pkcs10_t *this);
+};
+
+#endif /** PKCS10_H_ @}*/

src/libstrongswan/credentials/certificates/req.h

@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2007-2008 Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup x509 x509
+ * @{ @ingroup certificates
+ */
+
+#ifndef X509_H_
+#define X509_H_
+
+#include <utils/enumerator.h>
+#include <credentials/certificates/certificate.h>
+
+typedef struct x509_t x509_t;
+typedef enum x509_flag_t x509_flag_t;
+
+/**
+ * X.509 certificate flags.
+ */
+enum x509_flag_t {
+	/** cert has CA constraint */
+	X509_CA = 			(1<<0),
+	/** cert has AA constraint */
+	X509_AA = 			(1<<1),
+	/** cert has OCSP signer constraint */
+	X509_OCSP_SIGNER = 	(1<<2),
+	/** cert is self-signed */
+	X509_SELF_SIGNED =  (1<<3),
+};
+
+/**
+ * enum names for x509 flags
+ */
+extern enum_name_t *x509_flag_names;
+
+/**
+ * X.509 certificate interface.
+ *
+ * This interface adds additional methods to the certificate_t type to
+ * allow further operations on these certificates.
+ */
+struct x509_t {
+
+	/**
+	 * Implements certificate_t.
+	 */
+	certificate_t interface;
+
+	/**
+	 * Get the flags set for this certificate.
+	 *
+	 * @return			set of flags
+	 */
+	x509_flag_t (*get_flags)(x509_t *this);
+
+	/**
+	 * Get the certificate serial number.
+	 *
+	 * @return			chunk pointing to internal serial number
+	 */
+	chunk_t (*get_serial)(x509_t *this);
+
+	/**
+	 * Get the the authorityKeyIdentifier.
+	 *
+	 * @return			authKeyIdentifier as chunk_t, internal data
+	 */
+	chunk_t (*get_authKeyIdentifier)(x509_t *this);
+
+	/**
+	 * Create an enumerator over all subjectAltNames.
+	 *
+	 * @return			enumerator over subjectAltNames as identification_t*
+	 */
+	enumerator_t* (*create_subjectAltName_enumerator)(x509_t *this);
+
+	/**
+	 * Create an enumerator over all CRL URIs.
+	 *
+	 * @return			enumerator over URIs as char*
+	 */
+	enumerator_t* (*create_crl_uri_enumerator)(x509_t *this);
+
+	/**
+	 * Create an enumerator over all OCSP URIs.
+	 *
+	 * @return			enumerator over URIs as char*
+	 */
+	enumerator_t* (*create_ocsp_uri_enumerator)(x509_t *this);
+};
+
+#endif /** X509_H_ @}*/

src/libstrongswan/plugins/pem/pem_plugin.c

@@ -87,6 +87,8 @@ plugin_t *plugin_create()
 							(builder_function_t)pem_certificate_load);
 	lib->creds->add_builder(lib->creds, CRED_CERTIFICATE, CERT_X509_AC,
 							(builder_function_t)pem_certificate_load);
+	lib->creds->add_builder(lib->creds, CRED_CERTIFICATE, CERT_PKCS10_REQUEST,
+							(builder_function_t)pem_certificate_load);
 	lib->creds->add_builder(lib->creds, CRED_CERTIFICATE, CERT_TRUSTED_PUBKEY,
 							(builder_function_t)pem_certificate_load);
 	lib->creds->add_builder(lib->creds, CRED_CERTIFICATE, CERT_GPG,

src/libstrongswan/plugins/x509/Makefile.am

@@ -9,6 +9,7 @@ libstrongswan_x509_la_SOURCES = x509_plugin.h x509_plugin.c \
   x509_cert.h x509_cert.c \
   x509_crl.h x509_crl.c \
   x509_ac.h x509_ac.c \
+  x509_pkcs10.h x509_pkcs10.c \
   x509_ocsp_request.h x509_ocsp_request.c \
   x509_ocsp_response.h x509_ocsp_response.c \
   ietf_attr_list.h ietf_attr_list.c

src/libstrongswan/plugins/x509/x509_pkcs10.c

@@ -0,0 +1,640 @@
+/*
+ * Copyright (C) 2005 Jan Hutter, Martin Willi
+ * Copyright (C) 2009 Andreas Steffen
+ *
+ * HSR Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "x509_pkcs10.h"
+
+#include <library.h>
+#include <debug.h>
+#include <asn1/oid.h>
+#include <asn1/asn1.h>
+#include <asn1/asn1_parser.h>
+#include <credentials/keys/private_key.h>
+#include <utils/linked_list.h>
+#include <utils/identification.h>
+
+typedef struct private_x509_pkcs10_t private_x509_pkcs10_t;
+
+/**
+ * Private data of a x509_pkcs10_t object.
+ */
+struct private_x509_pkcs10_t {
+	/**
+	 * Public interface for this certificate.
+	 */
+	x509_pkcs10_t public;
+
+	/**
+	 * PKCS#10 certificate request encoding in ASN.1 DER format
+	 */
+	chunk_t encoding;
+
+	/**
+	 * PKCS#10 request body over which signature is computed
+	 */
+	chunk_t certificationRequestInfo;
+
+	/**
+	 * Version of the PKCS#10 certificate request
+	 */
+	u_int version;
+
+	/**
+	 * ID representing the certificate subject
+	 */
+	identification_t *subject;
+
+	/**
+	 * List of subjectAltNames as identification_t
+	 */
+	linked_list_t *subjectAltNames;
+
+	/**
+	 * certificate's embedded public key
+	 */
+	public_key_t *public_key;
+
+	/**
+	 * challenge password
+	 */
+	chunk_t challengePassword;
+
+	/**
+	 * Signature algorithm
+	 */
+	int algorithm;
+
+	/**
+	 * Signature
+	 */
+	chunk_t signature;
+
+	/**
+	 * Is the certificate request self-signed?
+	 */
+	bool self_signed;
+
+	/**
+	 * Certificate request parsed from blob/file?
+	 */
+	bool parsed;
+
+	/**
+	 * reference count
+	 */
+	refcount_t ref;
+};
+
+/**
+ * Implementation of certificate_t.get_type.
+ */
+static certificate_type_t get_type(private_x509_pkcs10_t *this)
+{
+	return CERT_PKCS10_REQUEST;
+}
+
+/**
+ * Implementation of certificate_t.get_subject and get_issuer.
+ */
+static identification_t* get_subject(private_x509_pkcs10_t *this)
+{
+	return this->subject;
+}
+
+/**
+ * Implementation of certificate_t.has_subject and has_issuer.
+ */
+static id_match_t has_subject(private_x509_pkcs10_t *this, identification_t *subject)
+{
+	return this->subject->matches(this->subject, subject);
+}
+
+/**
+ * Implementation of certificate_t.issued_by.
+ */
+static bool issued_by(private_x509_pkcs10_t *this, certificate_t *issuer)
+{
+	public_key_t *key;
+	signature_scheme_t scheme;
+
+	if (&this->public.interface.interface != issuer)
+	{
+		return FALSE;
+	}
+	if (this->self_signed)
+	{
+		return TRUE;
+	}
+
+	/* determine signature scheme */
+	scheme = signature_scheme_from_oid(this->algorithm);
+	if (scheme == SIGN_UNKNOWN)
+	{
+		return FALSE;
+	}
+
+	/* get the public key contained in the certificate request */
+	key = this->public_key;
+	if (!key)
+	{
+		return FALSE;
+	}
+	return key->verify(key, scheme, this->certificationRequestInfo,
+									this->signature);
+}
+
+/**
+ * Implementation of certificate_t.get_public_key.
+ */
+static public_key_t* get_public_key(private_x509_pkcs10_t *this)
+{
+	this->public_key->get_ref(this->public_key);
+	return this->public_key;
+}
+
+/**
+ * Implementation of certificate_t.get_validity.
+ */
+static bool get_validity(private_x509_pkcs10_t *this, time_t *when,
+						 time_t *not_before, time_t *not_after)
+{
+	if (not_before)
+	{
+		*not_before = 0;
+	}
+	if (not_after)
+	{
+		*not_after = ~0;
+	}
+	return TRUE;
+}
+
+/**
+ * Implementation of certificate_t.is_newer.
+ */
+static bool is_newer(certificate_t *this, certificate_t *that)
+{
+	return FALSE;
+}
+
+/**
+ * Implementation of certificate_t.get_encoding.
+ */
+static chunk_t get_encoding(private_x509_pkcs10_t *this)
+{
+	return chunk_clone(this->encoding);
+}
+
+/**
+ * Implementation of certificate_t.equals.
+ */
+static bool equals(private_x509_pkcs10_t *this, certificate_t *other)
+{
+	chunk_t encoding;
+	bool equal;
+
+	if (this == (private_x509_pkcs10_t*)other)
+	{
+		return TRUE;
+	}
+	if (other->get_type(other) != CERT_PKCS10_REQUEST)
+	{
+		return FALSE;
+	}
+	if (other->equals == (void*)equals)
+	{	/* skip allocation if we have the same implementation */
+		return chunk_equals(this->encoding, ((private_x509_pkcs10_t*)other)->encoding);
+	}
+	encoding = other->get_encoding(other);
+	equal = chunk_equals(this->encoding, encoding);
+	free(encoding.ptr);
+	return equal;
+}
+
+/**
+ * Implementation of certificate_t.get_ref
+ */
+static private_x509_pkcs10_t* get_ref(private_x509_pkcs10_t *this)
+{
+	ref_get(&this->ref);
+	return this;
+}
+
+/**
+ * Implementation of certificate_t.get_challengePassword.
+ */
+static chunk_t get_challengePassword(private_x509_pkcs10_t *this)
+{
+	return this->challengePassword;
+}
+
+/**
+ * Implementation of pkcs10_t.create_subjectAltName_enumerator.
+ */
+static enumerator_t* create_subjectAltName_enumerator(private_x509_pkcs10_t *this)
+{
+	return this->subjectAltNames->create_enumerator(this->subjectAltNames);
+}
+
+/**
+ * Imported from x509_cert.c
+ */
+extern void x509_parse_generalNames(chunk_t blob, int level0, bool implicit, linked_list_t *list);
+
+/**
+ * ASN.1 definition of a PKCS#10 extension request
+ */
+static const asn1Object_t extensionRequestObjects[] = {
+ 	{ 0, "extensions",   ASN1_SEQUENCE,     ASN1_LOOP           }, /* 0 */
+ 	{ 1,   "extension",   ASN1_SEQUENCE,     ASN1_NONE          }, /* 1 */
+	{ 2,     "extnID",	  ASN1_OID,          ASN1_BODY          }, /* 2 */
+	{ 2,     "critical",  ASN1_BOOLEAN,      ASN1_DEF|ASN1_BODY }, /* 3 */
+	{ 2,     "extnValue", ASN1_OCTET_STRING, ASN1_BODY          }, /* 4 */
+	{ 1, "end loop",      ASN1_EOC,          ASN1_END			}, /* 5 */
+	{ 0, "exit",          ASN1_EOC,          ASN1_EXIT          }
+};
+#define PKCS10_EXTN_ID			2
+#define PKCS10_EXTN_CRITICAL	3
+#define PKCS10_EXTN_VALUE		4
+
+/**
+ * Parses a PKCS#10 extension request
+ */
+static bool parse_extension_request(private_x509_pkcs10_t *this, chunk_t blob, int level0)
+{
+	asn1_parser_t *parser;
+	chunk_t object;
+	int objectID;
+	int extn_oid = OID_UNKNOWN;
+	bool success = FALSE;
+	bool critical;
+
+	parser = asn1_parser_create(extensionRequestObjects, blob);
+	parser->set_top_level(parser, level0);
+
+	while (parser->iterate(parser, &objectID, &object))
+	{
+		u_int level = parser->get_level(parser)+1;
+
+		switch (objectID)
+		{
+			case PKCS10_EXTN_ID:
+				extn_oid = asn1_known_oid(object);
+				break;
+			case PKCS10_EXTN_CRITICAL:
+				critical = object.len && *object.ptr;
+				DBG2("  %s", critical ? "TRUE" : "FALSE");
+				break;
+			case PKCS10_EXTN_VALUE:
+			{
+				switch (extn_oid)
+				{
+					case OID_SUBJECT_ALT_NAME:
+						x509_parse_generalNames(object, level, FALSE,
+												this->subjectAltNames);
+						break;
+					default:
+						break;
+				}
+				break;
+			}
+			default:
+				break;
+		}
+	}
+	success = parser->success(parser);
+	parser->destroy(parser);
+	return success;
+}
+
+/**
+ * Parses a PKCS#10 challenge password
+ */
+static bool parse_challengePassword(private_x509_pkcs10_t *this, chunk_t blob, int level)
+{
+	char tag;
+
+	if (blob.len < 2)
+	{
+		DBG1("L%d - challengePassword:  ASN.1 object smaller than 2 octets",
+					level);
+		return FALSE;
+	}
+	tag = *blob.ptr;
+	if (tag < ASN1_UTF8STRING || tag > ASN1_IA5STRING)
+	{
+		DBG1("L%d - challengePassword:  ASN.1 object is not a character string",
+					level);
+		return FALSE;
+	}
+	if (asn1_length(&blob) == ASN1_INVALID_LENGTH)
+	{
+		DBG1("L%d - challengePassword:  ASN.1 object has an invalid length",
+					level);
+		return FALSE;
+	}		
+	DBG2("L%d - challengePassword:", level);
+	DBG4("  '%.*s'", blob.len, blob.ptr);
+	return TRUE;
+}
+
+/**
+ * ASN.1 definition of a PKCS#10 certificate request
+ */
+static const asn1Object_t certificationRequestObjects[] = {
+	{ 0, "certificationRequest",       ASN1_SEQUENCE,    ASN1_OBJ  }, /*  0 */
+	{ 1,   "certificationRequestInfo", ASN1_SEQUENCE,    ASN1_OBJ  }, /*  1 */
+	{ 2,     "version",                ASN1_INTEGER,     ASN1_RAW  }, /*  2 */
+	{ 2,     "subject",                ASN1_SEQUENCE,    ASN1_OBJ  }, /*  3 */
+	{ 2,     "subjectPublicKeyInfo",   ASN1_SEQUENCE,    ASN1_RAW  }, /*  4 */
+	{ 2,     "attributes",             ASN1_CONTEXT_C_0, ASN1_LOOP }, /*  5 */
+	{ 3,       "attribute",            ASN1_SEQUENCE,    ASN1_NONE }, /*  6 */
+	{ 4,         "type",               ASN1_OID,         ASN1_BODY }, /*  7 */
+	{ 4,         "values",             ASN1_SET,         ASN1_LOOP }, /*  8 */
+	{ 5,           "value",            ASN1_EOC,         ASN1_RAW  }, /*  9 */
+	{ 4,         "end loop",           ASN1_EOC,         ASN1_END  }, /* 10 */
+	{ 2,     "end loop",               ASN1_EOC,         ASN1_END  }, /* 11 */
+	{ 1,   "signatureAlgorithm",       ASN1_EOC,         ASN1_RAW  }, /* 12 */
+	{ 1,    "signature",               ASN1_BIT_STRING,  ASN1_BODY }, /* 13 */
+	{ 0, "exit",                       ASN1_EOC,         ASN1_EXIT }
+};
+#define PKCS10_CERT_REQUEST_INFO		 1
+#define PKCS10_VERSION					 2
+#define PKCS10_SUBJECT					 3
+#define PKCS10_SUBJECT_PUBLIC_KEY_INFO	 4
+#define PKCS10_ATTR_TYPE				 7
+#define PKCS10_ATTR_VALUE				 9
+#define PKCS10_ALGORITHM				12
+#define PKCS10_SIGNATURE				13
+
+/**
+ * Parses a PKCS#10 certificate request
+ */
+static bool parse_certificate_request(private_x509_pkcs10_t *this)
+{
+	asn1_parser_t *parser;
+	chunk_t object;
+	int objectID;
+	int attr_oid = OID_UNKNOWN;
+	bool success = FALSE;
+
+	parser = asn1_parser_create(certificationRequestObjects, this->encoding);
+
+	while (parser->iterate(parser, &objectID, &object))
+	{
+		u_int level = parser->get_level(parser)+1;
+
+		switch (objectID)
+		{
+			case PKCS10_CERT_REQUEST_INFO:
+				this->certificationRequestInfo = object;
+				break;
+			case PKCS10_VERSION:
+				this->version = (object.len) ? (1+(u_int)*object.ptr) : 1;
+				DBG2("  v%d", this->version);
+				break;
+				break;
+			case PKCS10_SUBJECT:
+				this->subject = identification_create_from_encoding(ID_DER_ASN1_DN, object);
+				DBG2("  '%Y'", this->subject);
+				break;
+			case PKCS10_SUBJECT_PUBLIC_KEY_INFO:
+				this->public_key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY,
+						KEY_ANY, BUILD_BLOB_ASN1_DER, object, BUILD_END);
+				if (this->public_key == NULL)
+				{
+					goto end;
+				}
+				break;
+			case PKCS10_ATTR_TYPE:
+				attr_oid = asn1_known_oid(object);
+				break;
+			case PKCS10_ATTR_VALUE:
+				switch (attr_oid)
+				{
+					case OID_EXTENSION_REQUEST:
+						if (!parse_extension_request(this, object, level))
+						{
+							goto end;
+						}
+						break;
+					case OID_CHALLENGE_PASSWORD:
+						if (!parse_challengePassword(this, object, level))
+						{
+							goto end;
+						}
+						break;
+					default:
+						break;
+				}
+				break;
+			case PKCS10_ALGORITHM:
+				this->algorithm = asn1_parse_algorithmIdentifier(object, level, NULL);
+				break;
+			case PKCS10_SIGNATURE:
+				this->signature = object;
+				break;
+			default:
+				break;
+		}
+	}
+	success = parser->success(parser);
+
+end:
+	parser->destroy(parser);
+	if (success)
+	{
+		/* check if the certificate request is self-signed */
+		if (issued_by(this, &this->public.interface.interface))
+		{
+			this->self_signed = TRUE;
+		}
+		else
+		{
+			DBG1("certificate request is not self-signed");
+			success = FALSE;
+		}
+	}
+	return success;
+}
+
+/**
+ * Implementation of certificate_t.destroy
+ */
+static void destroy(private_x509_pkcs10_t *this)
+{
+	if (ref_put(&this->ref))
+	{
+		this->subjectAltNames->destroy_offset(this->subjectAltNames,
+									offsetof(identification_t, destroy));
+		DESTROY_IF(this->subject);
+		DESTROY_IF(this->public_key);
+		chunk_free(&this->encoding);
+		if (!this->parsed)
+		{	/* only parsed certificate requests point these fields to "encoded" */
+			chunk_free(&this->certificationRequestInfo);
+			chunk_free(&this->challengePassword);
+			chunk_free(&this->signature);
+		}
+		free(this);
+	}
+}
+
+/**
+ * create an empty but initialized PKCS#10 certificate request
+ */
+static private_x509_pkcs10_t* create_empty(void)
+{
+	private_x509_pkcs10_t *this = malloc_thing(private_x509_pkcs10_t);
+
+	this->public.interface.interface.get_type = (certificate_type_t (*) (certificate_t*))get_type;
+	this->public.interface.interface.get_subject = (identification_t* (*) (certificate_t*))get_subject;
+	this->public.interface.interface.get_issuer = (identification_t* (*) (certificate_t*))get_subject;
+	this->public.interface.interface.has_subject = (id_match_t (*) (certificate_t*, identification_t*))has_subject;
+	this->public.interface.interface.has_issuer = (id_match_t (*) (certificate_t*, identification_t*))has_subject;
+	this->public.interface.interface.issued_by = (bool (*) (certificate_t*, certificate_t*))issued_by;
+	this->public.interface.interface.get_public_key = (public_key_t* (*) (certificate_t*))get_public_key;
+	this->public.interface.interface.get_validity = (bool (*) (certificate_t*, time_t*, time_t*, time_t*))get_validity;
+	this->public.interface.interface.is_newer = (bool (*) (certificate_t*,certificate_t*))is_newer;
+	this->public.interface.interface.get_encoding = (chunk_t (*) (certificate_t*))get_encoding;
+	this->public.interface.interface.equals = (bool (*)(certificate_t*, certificate_t*))equals;
+	this->public.interface.interface.get_ref = (certificate_t* (*)(certificate_t*))get_ref;
+	this->public.interface.interface.destroy = (void (*)(certificate_t*))destroy;
+	this->public.interface.get_challengePassword = (chunk_t (*)(pkcs10_t*))get_challengePassword;
+	this->public.interface.create_subjectAltName_enumerator = (enumerator_t* (*)(pkcs10_t*))create_subjectAltName_enumerator;
+
+	this->encoding = chunk_empty;
+	this->certificationRequestInfo = chunk_empty;
+	this->subject = NULL;
+	this->public_key = NULL;
+	this->subjectAltNames = linked_list_create();
+	this->challengePassword = chunk_empty;
+	this->signature = chunk_empty;
+	this->ref = 1;
+	this->self_signed = FALSE;
+	this->parsed = FALSE;
+
+	return this;
+}
+
+/**
+ * Generate and sign a new certificate
+ */
+static bool generate(private_x509_pkcs10_t *cert, private_key_t *sign_key,
+					 int digest_alg)
+{
+	/* TODO */
+	return TRUE;
+}
+
+/**
+ * See header.
+ */
+x509_pkcs10_t *x509_pkcs10_load(certificate_type_t type, va_list args)
+{
+	chunk_t blob = chunk_empty;
+
+	while (TRUE)
+	{
+		switch (va_arg(args, builder_part_t))
+		{
+			case BUILD_BLOB_ASN1_DER:
+				blob = va_arg(args, chunk_t);
+				continue;
+			case BUILD_END:
+				break;
+			default:
+				return NULL;
+		}
+		break;
+	}
+
+	if (blob.ptr)
+	{
+		private_x509_pkcs10_t *cert = create_empty();
+
+		cert->encoding = chunk_clone(blob);
+		cert->parsed = TRUE;
+		if (parse_certificate_request(cert))
+		{
+			return &cert->public;
+		}
+		destroy(cert);
+	}
+	return NULL;
+}
+
+/**
+ * See header.
+ */
+x509_pkcs10_t *x509_pkcs10_gen(certificate_type_t type, va_list args)
+{
+	private_x509_pkcs10_t *cert;
+	private_key_t *sign_key = NULL;
+	hash_algorithm_t digest_alg = HASH_SHA1;
+
+	cert = create_empty();
+	while (TRUE)
+	{
+		switch (va_arg(args, builder_part_t))
+		{
+			case BUILD_SIGNING_KEY:
+				sign_key = va_arg(args, private_key_t*);
+				continue;
+			case BUILD_PUBLIC_KEY:
+				cert->public_key = va_arg(args, public_key_t*);
+				cert->public_key->get_ref(cert->public_key);
+				continue;
+			case BUILD_SUBJECT:
+				cert->subject = va_arg(args, identification_t*);
+				cert->subject = cert->subject->clone(cert->subject);
+				continue;
+			case BUILD_SUBJECT_ALTNAMES:
+			{
+				enumerator_t *enumerator;
+				identification_t *id;
+				linked_list_t *list;
+
+				list = va_arg(args, linked_list_t*);
+				enumerator = list->create_enumerator(list);
+				while (enumerator->enumerate(enumerator, &id))
+				{
+					cert->subjectAltNames->insert_last(
+										cert->subjectAltNames, id->clone(id));
+				}
+				enumerator->destroy(enumerator);
+				continue;
+			}
+			case BUILD_DIGEST_ALG:
+				digest_alg = va_arg(args, int);
+				continue;
+			case BUILD_END:
+				break;
+			default:
+				destroy(cert);
+				return NULL;
+		}
+		break;
+	}
+
+	if (sign_key && generate(cert, sign_key, digest_alg))
+	{
+		return &cert->public;
+	}
+	destroy(cert);
+	return NULL;
+}
+

src/libstrongswan/plugins/x509/x509_pkcs10.h

@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2008-2009 Martin Willi
+ * Copyright (C) 2009 Andreas Steffen
+ *
+ * HSR Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup x509_pkcs10 x509_pkcs10
+ * @{ @ingroup x509_p
+ */
+
+#ifndef X509_PKCS10_H_
+#define X509_PKCS10_H_
+
+typedef struct x509_pkcs10_t x509_pkcs10_t;
+
+#include <credentials/builder.h>
+#include <credentials/certificates/pkcs10.h>
+
+/**
+ * Implementation of pkcs10_t/certificate_t using own ASN.1 parser.
+ */
+struct x509_pkcs10_t {
+
+	/**
+	 * Implements the pkcs10_t interface
+	 */
+	pkcs10_t interface;
+};
+
+/**
+ * Load a PKCS#10 certificate.
+ *
+ * This function takes a BUILD_BLOB_ASN1_DER.
+ *
+ * @param type		certificate type, CERT_PKCS10_REQUEST only
+ * @param args		builder_part_t argument list
+ * @return			PKCS#10 certificate request, NULL on failure
+ */
+x509_pkcs10_t *x509_pkcs10_load(certificate_type_t type, va_list args);
+
+/**
+ * Generate a PKCS#10 certificate request.
+ *
+ * To issue a self-signed certificate, the function takes:
+ * BUILD_SUBJECT, BUILD_SUBJECT_ALTNAMES, BUILD_SIGNING_KEY, BUILD_DIGEST_ALG.
+ *
+ * @param type		certificate type, CERT_PKCS10_REQUEST only
+ * @param args		builder_part_t argument list
+ * @return			PKCS#10 certificate request, NULL on failure
+ */
+x509_pkcs10_t *x509_pkcs10_gen(certificate_type_t type, va_list args);
+
+#endif /** X509_PKCS10_H_ @}*/

src/libstrongswan/plugins/x509/x509_plugin.c

@@ -21,6 +21,7 @@
 #include "x509_crl.h"
 #include "x509_ocsp_request.h"
 #include "x509_ocsp_response.h"
+#include "x509_pkcs10.h"
 
 typedef struct private_x509_plugin_t private_x509_plugin_t;
 
@@ -54,6 +55,10 @@ static void destroy(private_x509_plugin_t *this)
 							   (builder_function_t)x509_ocsp_request_gen);
 	lib->creds->remove_builder(lib->creds,
 							   (builder_function_t)x509_ocsp_response_load);
+	lib->creds->remove_builder(lib->creds,
+							   (builder_function_t)x509_pkcs10_gen);
+	lib->creds->remove_builder(lib->creds,
+							   (builder_function_t)x509_pkcs10_load);
 	free(this);
 }
 
@@ -80,6 +85,10 @@ plugin_t *plugin_create()
 							(builder_function_t)x509_ocsp_request_gen);
 	lib->creds->add_builder(lib->creds, CRED_CERTIFICATE, CERT_X509_OCSP_RESPONSE,
 							(builder_function_t)x509_ocsp_response_load);
+	lib->creds->add_builder(lib->creds, CRED_CERTIFICATE, CERT_PKCS10_REQUEST,
+							(builder_function_t)x509_pkcs10_gen);
+	lib->creds->add_builder(lib->creds, CRED_CERTIFICATE, CERT_PKCS10_REQUEST,
+							(builder_function_t)x509_pkcs10_load);
 
 	return &this->public.plugin;
 }

src/pki/commands/issue.c

@@ -21,6 +21,7 @@
 #include <utils/optionsfrom.h>
 #include <credentials/certificates/certificate.h>
 #include <credentials/certificates/x509.h>
+#include <credentials/certificates/pkcs10.h>
 
 /**
  * Issue a certificate using a CA certificate and key
@@ -28,9 +29,10 @@
 static int issue(int argc, char *argv[])
 {
 	hash_algorithm_t digest = HASH_SHA1;
-	certificate_t *cert = NULL, *ca =NULL;
+	certificate_t *cert_req = NULL, *cert = NULL, *ca =NULL;
 	private_key_t *private = NULL;
 	public_key_t *public = NULL;
+	bool pkcs10 = FALSE;
 	char *file = NULL, *dn = NULL, *hex = NULL, *cacert = NULL, *cakey = NULL;
 	char *error = NULL;
 	identification_t *id = NULL;
@@ -62,7 +64,11 @@ static int issue(int argc, char *argv[])
 				}
 				continue;
 			case 't':
-				if (!streq(optarg, "pub"))
+				if (streq(optarg, "pkcs10"))
+				{
+					pkcs10 = TRUE;
+				}
+				else if (!streq(optarg, "pub"))
 				{
 					error = "invalid input type";
 					goto usage;
@@ -120,7 +126,7 @@ static int issue(int argc, char *argv[])
 		break;
 	}
 
-	if (!dn)
+	if (!pkcs10 && !dn)
 	{
 		error = "--dn is required";
 		goto usage;
@@ -135,11 +141,14 @@ static int issue(int argc, char *argv[])
 		error = "--cakey is required";
 		goto usage;
 	}
-	id = identification_create_from_string(dn);
-	if (id->get_type(id) != ID_DER_ASN1_DN)
+	if (dn)
 	{
-		error = "supplied --dn is not a distinguished name";
-		goto end;
+		id = identification_create_from_string(dn);
+		if (id->get_type(id) != ID_DER_ASN1_DN)
+		{
+			error = "supplied --dn is not a distinguished name";
+			goto end;
+		}
 	}
 	ca = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
 							BUILD_FROM_FILE, cacert, BUILD_END);
@@ -176,22 +185,6 @@ static int issue(int argc, char *argv[])
 	}
 	public->destroy(public);
 
-	if (file)
-	{
-		public = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_ANY,
-									 BUILD_FROM_FILE, file, BUILD_END);
-	}
-	else
-	{
-		public = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_ANY,
-									 BUILD_FROM_FD, 0, BUILD_END);
-	}
-	if (!public)
-	{
-		error = "parsing public key failed";
-		goto end;
-	}
-
 	if (hex)
 	{
 		serial = chunk_from_hex(chunk_create(hex, strlen(hex)), NULL);
@@ -208,8 +201,72 @@ static int issue(int argc, char *argv[])
 		rng->allocate_bytes(rng, 8, &serial);
 		rng->destroy(rng);
 	}
+
+	if (pkcs10)
+	{
+		enumerator_t *enumerator;
+		identification_t *subjectAltName;
+		pkcs10_t *req;
+
+		if (file)
+		{
+			cert_req = lib->creds->create(lib->creds, CRED_CERTIFICATE,
+										  CERT_PKCS10_REQUEST,
+										  BUILD_FROM_FILE, file, BUILD_END);
+		}
+		else
+		{
+			cert_req = lib->creds->create(lib->creds, CRED_CERTIFICATE,
+										  CERT_PKCS10_REQUEST,
+										  BUILD_FROM_FD, 0, BUILD_END);
+		}
+		if (!cert_req)
+		{
+			error = "parsing certificate request failed";
+			goto end;
+		}
+
+		/* If not set yet use subject from PKCS#10 certificate request as DN */
+		if (!id)
+		{
+			id = cert_req->get_subject(cert_req);
+			id = id->clone(id);
+		}
+
+		/* Add subjectAltNames from PKCS#10 certificate request */
+		req = (pkcs10_t*)cert_req;
+		enumerator = req->create_subjectAltName_enumerator(req);
+		while (enumerator->enumerate(enumerator, &subjectAltName))
+		{
+			san->insert_last(san, subjectAltName->clone(subjectAltName));
+		}
+		enumerator->destroy(enumerator);
+
+		/* Use public key from PKCS#10 certificate request */
+		public = cert_req->get_public_key(cert_req);
+	}
+	else
+	{
+		if (file)
+		{
+			public = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_ANY,
+										BUILD_FROM_FILE, file, BUILD_END);
+		}
+		else
+		{
+			public = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_ANY,
+										 BUILD_FROM_FD, 0, BUILD_END);
+		}
+	}
+	if (!public)
+	{
+		error = "parsing public key failed";
+		goto end;
+	}
+
 	not_before = time(NULL);
 	not_after = not_before + lifetime * 24 * 60 * 60;
+	
 	cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
 					BUILD_SIGNING_KEY, private, BUILD_SIGNING_CERT, ca,
 					BUILD_PUBLIC_KEY, public, BUILD_SUBJECT, id,
@@ -237,6 +294,7 @@ static int issue(int argc, char *argv[])
 
 end:
 	DESTROY_IF(id);
+	DESTROY_IF(cert_req);
 	DESTROY_IF(cert);
 	DESTROY_IF(ca);
 	DESTROY_IF(public);