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Diffstat (limited to 'src/charon/encoding/payloads/certreq_payload.c')
-rw-r--r--src/charon/encoding/payloads/certreq_payload.c335
1 files changed, 335 insertions, 0 deletions
diff --git a/src/charon/encoding/payloads/certreq_payload.c b/src/charon/encoding/payloads/certreq_payload.c
new file mode 100644
index 000000000..46663811a
--- /dev/null
+++ b/src/charon/encoding/payloads/certreq_payload.c
@@ -0,0 +1,335 @@
+/**
+ * @file certreq_payload.c
+ *
+ * @brief Implementation of certreq_payload_t.
+ *
+ */
+
+/*
+ * Copyright (C) 2005-2006 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * 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 <stddef.h>
+#include <string.h>
+
+#include <daemon.h>
+#include <crypto/hashers/hasher.h>
+#include <crypto/ca.h>
+
+#include "certreq_payload.h"
+
+
+typedef struct private_certreq_payload_t private_certreq_payload_t;
+
+/**
+ * Private data of an certreq_payload_t object.
+ *
+ */
+struct private_certreq_payload_t {
+ /**
+ * Public certreq_payload_t interface.
+ */
+ certreq_payload_t public;
+
+ /**
+ * Next payload type.
+ */
+ u_int8_t next_payload;
+
+ /**
+ * Critical flag.
+ */
+ bool critical;
+
+ /**
+ * Length of this payload.
+ */
+ u_int16_t payload_length;
+
+ /**
+ * Encoding of the CERT Data.
+ */
+ u_int8_t cert_encoding;
+
+ /**
+ * The contained certreq data value.
+ */
+ chunk_t certreq_data;
+};
+
+/**
+ * Encoding rules to parse or generate a CERTREQ payload
+ *
+ * The defined offsets are the positions in a object of type
+ * private_certreq_payload_t.
+ *
+ */
+encoding_rule_t certreq_payload_encodings[] = {
+ /* 1 Byte next payload type, stored in the field next_payload */
+ { U_INT_8, offsetof(private_certreq_payload_t, next_payload) },
+ /* the critical bit */
+ { FLAG, offsetof(private_certreq_payload_t, critical) },
+ /* 7 Bit reserved bits, nowhere stored */
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ /* Length of the whole payload*/
+ { PAYLOAD_LENGTH, offsetof(private_certreq_payload_t, payload_length)},
+ /* 1 Byte CERTREQ type*/
+ { U_INT_8, offsetof(private_certreq_payload_t, cert_encoding)},
+ /* some certreq data bytes, length is defined in PAYLOAD_LENGTH */
+ { CERTREQ_DATA, offsetof(private_certreq_payload_t, certreq_data)}
+};
+
+/*
+ 1 2 3
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ ! Next Payload !C! RESERVED ! Payload Length !
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ ! Cert Encoding ! !
+ +-+-+-+-+-+-+-+-+ !
+ ~ Certification Authority ~
+ ! !
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+*/
+
+/**
+ * Implementation of payload_t.verify.
+ */
+static status_t verify(private_certreq_payload_t *this)
+{
+ if ((this->cert_encoding == 0) ||
+ ((this->cert_encoding >= CERT_ROOF) && (this->cert_encoding <= 200)))
+ {
+ /* reserved IDs */
+ return FAILED;
+ }
+ return SUCCESS;
+}
+
+/**
+ * Implementation of certreq_payload_t.get_encoding_rules.
+ */
+static void get_encoding_rules(private_certreq_payload_t *this, encoding_rule_t **rules, size_t *rule_count)
+{
+ *rules = certreq_payload_encodings;
+ *rule_count = sizeof(certreq_payload_encodings) / sizeof(encoding_rule_t);
+}
+
+/**
+ * Implementation of payload_t.get_type.
+ */
+static payload_type_t get_payload_type(private_certreq_payload_t *this)
+{
+ return CERTIFICATE_REQUEST;
+}
+
+/**
+ * Implementation of payload_t.get_next_type.
+ */
+static payload_type_t get_next_type(private_certreq_payload_t *this)
+{
+ return (this->next_payload);
+}
+
+/**
+ * Implementation of payload_t.set_next_type.
+ */
+static void set_next_type(private_certreq_payload_t *this,payload_type_t type)
+{
+ this->next_payload = type;
+}
+
+/**
+ * Implementation of payload_t.get_length.
+ */
+static size_t get_length(private_certreq_payload_t *this)
+{
+ return this->payload_length;
+}
+
+/**
+ * Implementation of certreq_payload_t.set_cert_encoding.
+ */
+static void set_cert_encoding (private_certreq_payload_t *this, cert_encoding_t encoding)
+{
+ this->cert_encoding = encoding;
+}
+
+/**
+ * Implementation of certreq_payload_t.get_cert_encoding.
+ */
+static cert_encoding_t get_cert_encoding (private_certreq_payload_t *this)
+{
+ return (this->cert_encoding);
+}
+
+/**
+ * Implementation of certreq_payload_t.set_data.
+ */
+static void set_data (private_certreq_payload_t *this, chunk_t data)
+{
+ if (this->certreq_data.ptr != NULL)
+ {
+ chunk_free(&(this->certreq_data));
+ }
+ this->certreq_data.ptr = clalloc(data.ptr,data.len);
+ this->certreq_data.len = data.len;
+ this->payload_length = CERTREQ_PAYLOAD_HEADER_LENGTH + this->certreq_data.len;
+}
+
+/**
+ * Implementation of certreq_payload_t.get_data.
+ */
+static chunk_t get_data (private_certreq_payload_t *this)
+{
+ return (this->certreq_data);
+}
+
+/**
+ * Implementation of certreq_payload_t.get_data_clone.
+ */
+static chunk_t get_data_clone (private_certreq_payload_t *this)
+{
+ chunk_t cloned_data;
+ if (this->certreq_data.ptr == NULL)
+ {
+ return (this->certreq_data);
+ }
+ cloned_data.ptr = clalloc(this->certreq_data.ptr,this->certreq_data.len);
+ cloned_data.len = this->certreq_data.len;
+ return cloned_data;
+}
+
+/**
+ * Implementation of payload_t.destroy and certreq_payload_t.destroy.
+ */
+static void destroy(private_certreq_payload_t *this)
+{
+ if (this->certreq_data.ptr != NULL)
+ {
+ chunk_free(&(this->certreq_data));
+ }
+
+ free(this);
+}
+
+/*
+ * Described in header
+ */
+certreq_payload_t *certreq_payload_create()
+{
+ private_certreq_payload_t *this = malloc_thing(private_certreq_payload_t);
+
+ /* interface functions */
+ this->public.payload_interface.verify = (status_t (*) (payload_t*))verify;
+ this->public.payload_interface.get_encoding_rules = (void (*) (payload_t*,encoding_rule_t**,size_t*))get_encoding_rules;
+ this->public.payload_interface.get_length = (size_t (*) (payload_t*))get_length;
+ this->public.payload_interface.get_next_type = (payload_type_t (*) (payload_t*))get_next_type;
+ this->public.payload_interface.set_next_type = (void (*) (payload_t*,payload_type_t))set_next_type;
+ this->public.payload_interface.get_type = (payload_type_t (*) (payload_t*))get_payload_type;
+ this->public.payload_interface.destroy = (void (*) (payload_t*))destroy;
+
+ /* public functions */
+ this->public.destroy = (void (*) (certreq_payload_t*)) destroy;
+ this->public.set_cert_encoding = (void (*) (certreq_payload_t*,cert_encoding_t))set_cert_encoding;
+ this->public.get_cert_encoding = (cert_encoding_t (*) (certreq_payload_t*))get_cert_encoding;
+ this->public.set_data = (void (*) (certreq_payload_t*,chunk_t))set_data;
+ this->public.get_data_clone = (chunk_t (*) (certreq_payload_t*))get_data_clone;
+ this->public.get_data = (chunk_t (*) (certreq_payload_t*))get_data;
+
+ /* private variables */
+ this->critical = FALSE;
+ this->next_payload = NO_PAYLOAD;
+ this->payload_length =CERTREQ_PAYLOAD_HEADER_LENGTH;
+ this->certreq_data = chunk_empty;
+
+ return (&(this->public));
+}
+
+/*
+ * Described in header
+ */
+certreq_payload_t *certreq_payload_create_from_cacert(identification_t *id)
+{
+ x509_t *cacert;
+ rsa_public_key_t *pubkey;
+ chunk_t keyid;
+ certreq_payload_t *this;
+
+ cacert = charon->credentials->get_auth_certificate(charon->credentials, AUTH_CA, id);
+ if (cacert == NULL)
+ {
+ /* no such CA cert */
+ return NULL;
+ }
+
+ this = certreq_payload_create();
+ pubkey = cacert->get_public_key(cacert);
+ keyid = pubkey->get_keyid(pubkey);
+
+ DBG2(DBG_IKE, "requesting certificate issued by '%D'", id);
+ DBG2(DBG_IKE, " with keyid %#B", &keyid);
+
+ this->set_cert_encoding(this, CERT_X509_SIGNATURE);
+ this->set_data(this, keyid);
+ return this;
+}
+
+/*
+ * Described in header
+ */
+certreq_payload_t *certreq_payload_create_from_cacerts(void)
+{
+ certreq_payload_t *this;
+ chunk_t keyids;
+ u_char *pos;
+ ca_info_t *cainfo;
+
+ iterator_t *iterator = charon->credentials->create_cainfo_iterator(charon->credentials);
+ int count = iterator->get_count(iterator);
+
+ if (count == 0)
+ {
+ iterator->destroy(iterator);
+ return NULL;
+ }
+
+ this = certreq_payload_create();
+ keyids = chunk_alloc(count * HASH_SIZE_SHA1);
+ pos = keyids.ptr;
+
+ while (iterator->iterate(iterator, (void**)&cainfo))
+ {
+ x509_t *cacert = cainfo->get_certificate(cainfo);
+ chunk_t keyid = cacert->get_keyid(cacert);
+
+ DBG2(DBG_IKE, "requesting certificate issued by '%D'", cacert->get_subject(cacert));
+ DBG2(DBG_IKE, " with keyid %#B", &keyid);
+ memcpy(pos, keyid.ptr, keyid.len);
+ pos += HASH_SIZE_SHA1;
+ }
+ iterator->destroy(iterator);
+
+ this->set_cert_encoding(this, CERT_X509_SIGNATURE);
+ this->set_data(this, keyids);
+ free(keyids.ptr);
+ return this;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 16:04:26 +0000