Annotation of embedaddon/strongswan/src/libimcv/tcg/seg/tcg_seg_attr_seg_env.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2014 Andreas Steffen
! 3: * HSR Hochschule fuer Technik Rapperswil
! 4: *
! 5: * This program is free software; you can redistribute it and/or modify it
! 6: * under the terms of the GNU General Public License as published by the
! 7: * Free Software Foundation; either version 2 of the License, or (at your
! 8: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
! 9: *
! 10: * This program is distributed in the hope that it will be useful, but
! 11: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 12: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
! 13: * for more details.
! 14: */
! 15:
! 16: #include "tcg_seg_attr_seg_env.h"
! 17:
! 18: #include <pa_tnc/pa_tnc_msg.h>
! 19: #include <bio/bio_writer.h>
! 20: #include <bio/bio_reader.h>
! 21: #include <utils/debug.h>
! 22:
! 23: typedef struct private_tcg_seg_attr_seg_env_t private_tcg_seg_attr_seg_env_t;
! 24:
! 25: /**
! 26: * Attribute Segment Envelope
! 27: * see TCG IF-M Segmentation Specification
! 28: *
! 29: * 1 2 3
! 30: * 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
! 31: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! 32: * |M|S| Reserved | Base Attribute ID |
! 33: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! 34: * | Segment Value (Variable Length) |
! 35: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! 36: */
! 37:
! 38: /**
! 39: * Private data of an tcg_seg_attr_seg_env_t object.
! 40: */
! 41: struct private_tcg_seg_attr_seg_env_t {
! 42:
! 43: /**
! 44: * Public members of tcg_seg_attr_seg_env_t
! 45: */
! 46: tcg_seg_attr_seg_env_t public;
! 47:
! 48: /**
! 49: * Vendor-specific attribute type
! 50: */
! 51: pen_type_t type;
! 52:
! 53: /**
! 54: * Length of attribute value
! 55: */
! 56: size_t length;
! 57:
! 58: /**
! 59: * Attribute value or segment
! 60: */
! 61: chunk_t value;
! 62:
! 63: /**
! 64: * Noskip flag
! 65: */
! 66: bool noskip_flag;
! 67:
! 68: /**
! 69: * PA-TNC segmentation flags
! 70: */
! 71: uint8_t flags;
! 72:
! 73: /**
! 74: * Base Attribute ID
! 75: */
! 76: uint32_t base_attr_id;
! 77:
! 78: /**
! 79: * Attribute value
! 80: */
! 81: chunk_t segment;
! 82:
! 83: /**
! 84: * Reference count
! 85: */
! 86: refcount_t ref;
! 87: };
! 88:
! 89: METHOD(pa_tnc_attr_t, get_type, pen_type_t,
! 90: private_tcg_seg_attr_seg_env_t *this)
! 91: {
! 92: return this->type;
! 93: }
! 94:
! 95: METHOD(pa_tnc_attr_t, get_value, chunk_t,
! 96: private_tcg_seg_attr_seg_env_t *this)
! 97: {
! 98: return this->value;
! 99: }
! 100:
! 101: METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
! 102: private_tcg_seg_attr_seg_env_t *this)
! 103: {
! 104: return this->noskip_flag;
! 105: }
! 106:
! 107: METHOD(pa_tnc_attr_t, set_noskip_flag,void,
! 108: private_tcg_seg_attr_seg_env_t *this, bool noskip)
! 109: {
! 110: this->noskip_flag = noskip;
! 111: }
! 112:
! 113: METHOD(pa_tnc_attr_t, build, void,
! 114: private_tcg_seg_attr_seg_env_t *this)
! 115: {
! 116: /* constructor already allocated and built value */
! 117: this->length = this->value.len;
! 118: return;
! 119: }
! 120:
! 121: METHOD(pa_tnc_attr_t, process, status_t,
! 122: private_tcg_seg_attr_seg_env_t *this, uint32_t *offset)
! 123: {
! 124: bio_reader_t *reader;
! 125:
! 126: *offset = 0;
! 127:
! 128: if (this->value.len < this->length)
! 129: {
! 130: DBG1(DBG_TNC, "segmentation not allowed for %N/%N", pen_names, PEN_TCG,
! 131: tcg_attr_names, this->type.type);
! 132: return FAILED;
! 133: }
! 134: if (this->value.len < TCG_SEG_ATTR_SEG_ENV_HEADER)
! 135: {
! 136: DBG1(DBG_TNC, "insufficient data for %N/%N", pen_names, PEN_TCG,
! 137: tcg_attr_names, this->type.type);
! 138: return FAILED;
! 139: }
! 140: reader = bio_reader_create(this->value);
! 141: reader->read_uint8 (reader, &this->flags);
! 142: reader->read_uint24(reader, &this->base_attr_id);
! 143: reader->destroy(reader);
! 144:
! 145: return SUCCESS;
! 146: }
! 147:
! 148: METHOD(pa_tnc_attr_t, add_segment, void,
! 149: private_tcg_seg_attr_seg_env_t *this, chunk_t segment)
! 150: {
! 151: /* no segments are expected */
! 152: }
! 153:
! 154: METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*,
! 155: private_tcg_seg_attr_seg_env_t *this)
! 156: {
! 157: ref_get(&this->ref);
! 158: return &this->public.pa_tnc_attribute;
! 159: }
! 160:
! 161: METHOD(pa_tnc_attr_t, destroy, void,
! 162: private_tcg_seg_attr_seg_env_t *this)
! 163: {
! 164: if (ref_put(&this->ref))
! 165: {
! 166: free(this->value.ptr);
! 167: free(this);
! 168: }
! 169: }
! 170:
! 171: METHOD(tcg_seg_attr_seg_env_t, get_segment, chunk_t,
! 172: private_tcg_seg_attr_seg_env_t *this, uint8_t *flags)
! 173: {
! 174: if (flags)
! 175: {
! 176: *flags = this->flags;
! 177: }
! 178: return chunk_skip(this->value, TCG_SEG_ATTR_SEG_ENV_HEADER);
! 179: }
! 180:
! 181: METHOD(tcg_seg_attr_seg_env_t, get_base_attr_id, uint32_t,
! 182: private_tcg_seg_attr_seg_env_t *this)
! 183: {
! 184: return this->base_attr_id;
! 185: }
! 186:
! 187: /**
! 188: * Described in header.
! 189: */
! 190: pa_tnc_attr_t* tcg_seg_attr_seg_env_create(chunk_t segment, uint8_t flags,
! 191: uint32_t base_attr_id)
! 192: {
! 193: private_tcg_seg_attr_seg_env_t *this;
! 194:
! 195: INIT(this,
! 196: .public = {
! 197: .pa_tnc_attribute = {
! 198: .get_type = _get_type,
! 199: .get_value = _get_value,
! 200: .get_noskip_flag = _get_noskip_flag,
! 201: .set_noskip_flag = _set_noskip_flag,
! 202: .build = _build,
! 203: .process = _process,
! 204: .add_segment = _add_segment,
! 205: .get_ref = _get_ref,
! 206: .destroy = _destroy,
! 207: },
! 208: .get_base_attr_id = _get_base_attr_id,
! 209: .get_segment = _get_segment,
! 210: },
! 211: .type = { PEN_TCG, TCG_SEG_ATTR_SEG_ENV },
! 212: .flags = flags,
! 213: .base_attr_id = base_attr_id,
! 214: .value = chunk_alloc(TCG_SEG_ATTR_SEG_ENV_HEADER + segment.len),
! 215: .ref = 1,
! 216: );
! 217:
! 218: htoun32(this->value.ptr, base_attr_id);
! 219: *this->value.ptr = flags;
! 220: memcpy(this->value.ptr + TCG_SEG_ATTR_SEG_ENV_HEADER,
! 221: segment.ptr, segment.len);
! 222:
! 223: return &this->public.pa_tnc_attribute;
! 224: }
! 225:
! 226: /**
! 227: * Described in header.
! 228: */
! 229: pa_tnc_attr_t *tcg_seg_attr_seg_env_create_from_data(size_t length,
! 230: chunk_t data)
! 231: {
! 232: private_tcg_seg_attr_seg_env_t *this;
! 233:
! 234: INIT(this,
! 235: .public = {
! 236: .pa_tnc_attribute = {
! 237: .get_type = _get_type,
! 238: .get_value = _get_value,
! 239: .get_noskip_flag = _get_noskip_flag,
! 240: .set_noskip_flag = _set_noskip_flag,
! 241: .build = _build,
! 242: .process = _process,
! 243: .add_segment = _add_segment,
! 244: .get_ref = _get_ref,
! 245: .destroy = _destroy,
! 246: },
! 247: .get_base_attr_id = _get_base_attr_id,
! 248: .get_segment = _get_segment,
! 249: },
! 250: .type = { PEN_TCG, TCG_SEG_ATTR_SEG_ENV },
! 251: .length = length,
! 252: .value = chunk_clone(data),
! 253: .ref = 1,
! 254: );
! 255:
! 256: return &this->public.pa_tnc_attribute;
! 257: }
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