summaryrefslogtreecommitdiff
path: root/src/libstrongswan/plugins/pubkey/pubkey_public_key.c
diff options
context:
space:
mode:
authorRene Mayrhofer <rene@mayrhofer.eu.org>2008-07-09 21:02:41 +0000
committerRene Mayrhofer <rene@mayrhofer.eu.org>2008-07-09 21:02:41 +0000
commitdb67c87db3c9089ea8d2e14f617bf3d9e2af261f (patch)
tree665c0caea83d34c11c1517c4c57137bb58cba6fb /src/libstrongswan/plugins/pubkey/pubkey_public_key.c
parent1c088a8b6237ec67f63c23f97a0f2dc4e99af869 (diff)
downloadvyos-strongswan-db67c87db3c9089ea8d2e14f617bf3d9e2af261f.tar.gz
vyos-strongswan-db67c87db3c9089ea8d2e14f617bf3d9e2af261f.zip
[svn-upgrade] Integrating new upstream version, strongswan (4.2.4)
Diffstat (limited to 'src/libstrongswan/plugins/pubkey/pubkey_public_key.c')
-rw-r--r--src/libstrongswan/plugins/pubkey/pubkey_public_key.c185
1 files changed, 185 insertions, 0 deletions
diff --git a/src/libstrongswan/plugins/pubkey/pubkey_public_key.c b/src/libstrongswan/plugins/pubkey/pubkey_public_key.c
new file mode 100644
index 000000000..0527ed758
--- /dev/null
+++ b/src/libstrongswan/plugins/pubkey/pubkey_public_key.c
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2008 Tobias Brunner
+ * Copyright (C) 2008 Martin Willi
+ * Copyright (C) 2000-2008 Andreas Steffen
+ * 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.
+ *
+ * $Id: pubkey_public_key.c 4059 2008-06-11 14:10:02Z martin $
+ */
+
+#include "pubkey_public_key.h"
+
+#include <debug.h>
+#include <asn1/pem.h>
+#include <asn1/oid.h>
+#include <asn1/asn1.h>
+#include <asn1/asn1_parser.h>
+
+/**
+ * ASN.1 definition of a subjectPublicKeyInfo structure
+ */
+static const asn1Object_t pkinfoObjects[] = {
+ { 0, "subjectPublicKeyInfo",ASN1_SEQUENCE, ASN1_NONE }, /* 0 */
+ { 1, "algorithm", ASN1_EOC, ASN1_RAW }, /* 1 */
+ { 1, "subjectPublicKey", ASN1_BIT_STRING, ASN1_BODY }, /* 2 */
+ { 0, "exit", ASN1_EOC, ASN1_EXIT }
+};
+#define PKINFO_SUBJECT_PUBLIC_KEY_ALGORITHM 1
+#define PKINFO_SUBJECT_PUBLIC_KEY 2
+
+
+/**
+ * Load a public key from an ASN1 encoded blob
+ */
+static public_key_t *load(chunk_t blob)
+{
+ asn1_parser_t *parser;
+ chunk_t object;
+ int objectID;
+ public_key_t *key = NULL;
+ key_type_t type = KEY_ANY;
+
+ parser = asn1_parser_create(pkinfoObjects, blob);
+
+ while (parser->iterate(parser, &objectID, &object))
+ {
+ switch (objectID)
+ {
+ case PKINFO_SUBJECT_PUBLIC_KEY_ALGORITHM:
+ {
+ int oid = asn1_parse_algorithmIdentifier(object,
+ parser->get_level(parser)+1, NULL);
+
+ if (oid == OID_RSA_ENCRYPTION)
+ {
+ type = KEY_RSA;
+ }
+ else if (oid == OID_EC_PUBLICKEY)
+ {
+ /* we need the whole subjectPublicKeyInfo for EC public keys */
+ key = lib->creds->create(lib->creds,
+ CRED_PUBLIC_KEY, KEY_ECDSA, BUILD_BLOB_ASN1_DER,
+ chunk_clone(blob), BUILD_END);
+ goto end;
+ }
+ else
+ {
+ /* key type not supported */
+ goto end;
+ }
+ break;
+ }
+ case PKINFO_SUBJECT_PUBLIC_KEY:
+ if (object.len > 0 && *object.ptr == 0x00)
+ {
+ /* skip initial bit string octet defining 0 unused bits */
+ object = chunk_skip(object, 1);
+ }
+ key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, type,
+ BUILD_BLOB_ASN1_DER, chunk_clone(object),
+ BUILD_END);
+ break;
+ }
+ }
+
+end:
+ parser->destroy(parser);
+ free(blob.ptr);
+ return key;
+}
+
+typedef struct private_builder_t private_builder_t;
+/**
+ * Builder implementation for key loading
+ */
+struct private_builder_t {
+ /** implements the builder interface */
+ builder_t public;
+ /** loaded public key */
+ public_key_t *key;
+};
+
+/**
+ * Implementation of builder_t.build
+ */
+static public_key_t *build(private_builder_t *this)
+{
+ public_key_t *key = this->key;
+
+ free(this);
+ return key;
+}
+
+/**
+ * Implementation of builder_t.add
+ */
+static void add(private_builder_t *this, builder_part_t part, ...)
+{
+ va_list args;
+
+ if (this->key)
+ {
+ DBG1("ignoring surplus build part %N", builder_part_names, part);
+ return;
+ }
+ va_start(args, part);
+ switch (part)
+ {
+ case BUILD_BLOB_ASN1_DER:
+ {
+ this->key = load(va_arg(args, chunk_t));
+ break;
+ }
+ case BUILD_BLOB_ASN1_PEM:
+ {
+ bool pgp;
+ char *pem;
+ chunk_t blob;
+
+ pem = va_arg(args, char *);
+ blob = chunk_clone(chunk_create(pem, strlen(pem)));
+ if (pem_to_bin(&blob, &chunk_empty, &pgp))
+ {
+ this->key = load(chunk_clone(blob));
+ }
+ free(blob.ptr);
+ break;
+ }
+ default:
+ DBG1("ignoring unsupported build part %N", builder_part_names, part);
+ break;
+ }
+ va_end(args);
+}
+
+/**
+ * Builder construction function
+ */
+builder_t *pubkey_public_key_builder(key_type_t type)
+{
+ private_builder_t *this;
+
+ if (type != KEY_ANY)
+ {
+ return NULL;
+ }
+
+ this = malloc_thing(private_builder_t);
+
+ this->key = NULL;
+ this->public.add = (void(*)(builder_t *this, builder_part_t part, ...))add;
+ this->public.build = (void*(*)(builder_t *this))build;
+
+ return &this->public;
+}
+