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-rw-r--r--src/libimcv/ietf/ietf_attr_remediation_instr.c363
1 files changed, 363 insertions, 0 deletions
diff --git a/src/libimcv/ietf/ietf_attr_remediation_instr.c b/src/libimcv/ietf/ietf_attr_remediation_instr.c
new file mode 100644
index 000000000..f3b4e83dd
--- /dev/null
+++ b/src/libimcv/ietf/ietf_attr_remediation_instr.c
@@ -0,0 +1,363 @@
+/*
+ * Copyright (C) 2012 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 "ietf_attr_remediation_instr.h"
+
+#include <pa_tnc/pa_tnc_msg.h>
+#include <bio/bio_writer.h>
+#include <bio/bio_reader.h>
+#include <utils/debug.h>
+
+typedef struct private_ietf_attr_remediation_instr_t private_ietf_attr_remediation_instr_t;
+
+/**
+ * PA-TNC Remediation Instructions type (see section 4.2.10 of RFC 5792)
+ *
+ * 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
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Reserved | Remediation Parameters Vendor ID |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Remediation Parameters Type |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Remediation Parameters (Variable Length) |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+
+#define REMEDIATION_INSTR_MIN_SIZE 8
+#define REMEDIATION_INSTR_RESERVED 0x00
+
+/**
+ * IETF Remediation Parameters URI type (see section 4.2.10.1 of RFC 5792)
+ *
+ * 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
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Remediation URI (Variable Length) |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+*/
+
+/**
+ * IETF Remediation Parameters String type (see section 4.2.10.2 of RFC 5792)
+ *
+ * 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
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Remediation String Length |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Remediation String (Variable Length) |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Lang Code Len | Remediation String Lang Code (Variable Len) |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+
+/**
+ * Private data of an ietf_attr_remediation_instr_t object.
+ */
+struct private_ietf_attr_remediation_instr_t {
+
+ /**
+ * Public members of ietf_attr_remediation_instr_t
+ */
+ ietf_attr_remediation_instr_t public;
+
+ /**
+ * Vendor-specific attribute type
+ */
+ pen_type_t type;
+
+ /**
+ * Attribute value
+ */
+ chunk_t value;
+
+ /**
+ * Noskip flag
+ */
+ bool noskip_flag;
+
+ /**
+ * Remediation Parameters Type
+ */
+ pen_type_t parameters_type;
+
+ /**
+ * Remediation Parameters
+ */
+ chunk_t parameters;
+
+ /**
+ * Remediation String
+ */
+ chunk_t string;
+
+ /**
+ * Remediation Language Code
+ */
+ chunk_t lang_code;
+
+ /**
+ * Reference count
+ */
+ refcount_t ref;
+};
+
+METHOD(pa_tnc_attr_t, get_type, pen_type_t,
+ private_ietf_attr_remediation_instr_t *this)
+{
+ return this->type;
+}
+
+METHOD(pa_tnc_attr_t, get_value, chunk_t,
+ private_ietf_attr_remediation_instr_t *this)
+{
+ return this->value;
+}
+
+METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
+ private_ietf_attr_remediation_instr_t *this)
+{
+ return this->noskip_flag;
+}
+
+METHOD(pa_tnc_attr_t, set_noskip_flag,void,
+ private_ietf_attr_remediation_instr_t *this, bool noskip)
+{
+ this->noskip_flag = noskip;
+}
+
+METHOD(pa_tnc_attr_t, build, void,
+ private_ietf_attr_remediation_instr_t *this)
+{
+ bio_writer_t *writer;
+
+ if (this->value.ptr)
+ {
+ return;
+ }
+
+ writer = bio_writer_create(REMEDIATION_INSTR_MIN_SIZE);
+ writer->write_uint8 (writer, REMEDIATION_INSTR_RESERVED);
+ writer->write_uint24(writer, this->parameters_type.vendor_id);
+ writer->write_uint32(writer, this->parameters_type.type);
+ writer->write_data (writer, this->parameters);
+
+ this->value = chunk_clone(writer->get_buf(writer));
+ writer->destroy(writer);
+}
+
+METHOD(pa_tnc_attr_t, process, status_t,
+ private_ietf_attr_remediation_instr_t *this, u_int32_t *offset)
+{
+ bio_reader_t *reader;
+ u_int8_t reserved;
+ status_t status = SUCCESS;
+ u_char *pos;
+
+ *offset = 0;
+
+ if (this->value.len < REMEDIATION_INSTR_MIN_SIZE)
+ {
+ DBG1(DBG_TNC, "insufficient data for IETF remediation instructions");
+ return FAILED;
+ }
+ reader = bio_reader_create(this->value);
+ reader->read_uint8 (reader, &reserved);
+ reader->read_uint24(reader, &this->parameters_type.vendor_id);
+ reader->read_uint32(reader, &this->parameters_type.type);
+ reader->read_data (reader, reader->remaining(reader), &this->parameters);
+
+ this->parameters = chunk_clone(this->parameters);
+ reader->destroy(reader);
+
+ if (this->parameters_type.vendor_id == PEN_IETF &&
+ this->parameters_type.type == IETF_REMEDIATION_PARAMETERS_STRING)
+ {
+ reader = bio_reader_create(this->parameters);
+ status = FAILED;
+ *offset = 8;
+
+ if (!reader->read_data32(reader, &this->string))
+ {
+ DBG1(DBG_TNC, "insufficient data for IETF remediation string");
+ goto end;
+ }
+ pos = memchr(this->string.ptr, '\0', this->string.len);
+ if (pos)
+ {
+ DBG1(DBG_TNC, "nul termination in IETF remediation string");
+ *offset += 1 + (pos - this->string.ptr);
+ goto end;
+ }
+ *offset += 4 + this->string.len;
+
+ if (!reader->read_data8(reader, &this->lang_code))
+ {
+ DBG1(DBG_TNC, "insufficient data for IETF remediation lang code");
+ goto end;
+ }
+ status = SUCCESS;
+
+end:
+ reader->destroy(reader);
+ }
+ return status;
+}
+
+METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*,
+ private_ietf_attr_remediation_instr_t *this)
+{
+ ref_get(&this->ref);
+ return &this->public.pa_tnc_attribute;
+}
+
+METHOD(pa_tnc_attr_t, destroy, void,
+ private_ietf_attr_remediation_instr_t *this)
+{
+ if (ref_put(&this->ref))
+ {
+ free(this->parameters.ptr);
+ free(this->value.ptr);
+ free(this);
+ }
+}
+
+METHOD(ietf_attr_remediation_instr_t, get_parameters_type, pen_type_t,
+ private_ietf_attr_remediation_instr_t *this)
+{
+ return this->parameters_type;
+}
+
+METHOD(ietf_attr_remediation_instr_t, get_parameters, chunk_t,
+ private_ietf_attr_remediation_instr_t *this)
+{
+ return this->parameters;
+}
+
+METHOD(ietf_attr_remediation_instr_t, get_uri, chunk_t,
+ private_ietf_attr_remediation_instr_t *this)
+{
+ return this->parameters;
+}
+
+METHOD(ietf_attr_remediation_instr_t, get_string, chunk_t,
+ private_ietf_attr_remediation_instr_t *this, chunk_t *lang_code)
+{
+ if (lang_code)
+ {
+ *lang_code = this->lang_code;
+ }
+ return this->string;
+}
+
+/**
+ * Described in header.
+ */
+pa_tnc_attr_t *ietf_attr_remediation_instr_create(pen_type_t parameters_type,
+ chunk_t parameters)
+{
+ private_ietf_attr_remediation_instr_t *this;
+
+ INIT(this,
+ .public = {
+ .pa_tnc_attribute = {
+ .get_type = _get_type,
+ .get_value = _get_value,
+ .get_noskip_flag = _get_noskip_flag,
+ .set_noskip_flag = _set_noskip_flag,
+ .build = _build,
+ .process = _process,
+ .get_ref = _get_ref,
+ .destroy = _destroy,
+ },
+ .get_parameters_type = _get_parameters_type,
+ .get_parameters = _get_parameters,
+ .get_uri = _get_uri,
+ .get_string = _get_string,
+ },
+ .type = { PEN_IETF, IETF_ATTR_REMEDIATION_INSTRUCTIONS },
+ .parameters_type = parameters_type,
+ .parameters = chunk_clone(parameters),
+ .ref = 1,
+ );
+
+ return &this->public.pa_tnc_attribute;
+}
+
+/**
+ * Described in header.
+ */
+pa_tnc_attr_t *ietf_attr_remediation_instr_create_from_uri(chunk_t uri)
+{
+ pen_type_t type = { PEN_IETF, IETF_REMEDIATION_PARAMETERS_URI };
+
+ return ietf_attr_remediation_instr_create(type, uri);
+}
+
+/**
+ * Described in header.
+ */
+pa_tnc_attr_t *ietf_attr_remediation_instr_create_from_string(chunk_t string,
+ chunk_t lang_code)
+{
+ pa_tnc_attr_t *attr;
+ bio_writer_t *writer;
+ pen_type_t type = { PEN_IETF, IETF_REMEDIATION_PARAMETERS_STRING };
+
+ /* limit language code to 255 octets */
+ lang_code.len = min(255, lang_code.len);
+
+ writer = bio_writer_create(4 + string.len + 1 + lang_code.len);
+ writer->write_data32(writer, string);
+ writer->write_data8 (writer, lang_code);
+
+ attr = ietf_attr_remediation_instr_create(type, writer->get_buf(writer));
+ writer->destroy(writer);
+
+ return attr;
+}
+
+/**
+ * Described in header.
+ */
+pa_tnc_attr_t *ietf_attr_remediation_instr_create_from_data(chunk_t data)
+{
+ private_ietf_attr_remediation_instr_t *this;
+
+ INIT(this,
+ .public = {
+ .pa_tnc_attribute = {
+ .get_type = _get_type,
+ .get_value = _get_value,
+ .get_noskip_flag = _get_noskip_flag,
+ .set_noskip_flag = _set_noskip_flag,
+ .build = _build,
+ .process = _process,
+ .get_ref = _get_ref,
+ .destroy = _destroy,
+ },
+ .get_parameters_type = _get_parameters_type,
+ .get_parameters = _get_parameters,
+ .get_uri = _get_uri,
+ .get_string = _get_string,
+ },
+ .type = { PEN_IETF, IETF_ATTR_REMEDIATION_INSTRUCTIONS },
+ .value = chunk_clone(data),
+ .ref = 1,
+ );
+
+ return &this->public.pa_tnc_attribute;
+}
+
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