src/functions/functions.vpn-security-policies

   1 #!/bin/bash
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2017  IPFire Network Development Team                         #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 VPN_SECURITY_POLICIES_CONFIG_SETTINGS="CIPHER COMPRESSION GROUP_TYPE INTEGRITY KEY_EXCHANGE LIFETIME PFS"
  23 VPN_SECURITY_POLICIES_READONLY="system"
  24
  25 VPN_DEFAULT_SECURITY_POLICY="system"
  26
  27 declare -A VPN_SUPPORTED_CIPHERS=(
  28         # 3DES-CBC
  29         [3DES-CBC]="168 bit 3DES-EDE-CBC"
  30
  31         # AES-CBC
  32         [AES256-CBC]="256 bit AES-CBC"
  33         [AES192-CBC]="192 bit AES-CBC"
  34         [AES128-CBC]="128 bit AES-CBC"
  35
  36         # AES-CTR
  37         [AES256-CTR]="256 bit AES-COUNTER"
  38         [AES192-CTR]="192 bit AES-COUNTER"
  39         [AES128-CTR]="128 bit AES-COUNTER"
  40
  41         # AES-GCM
  42         [AES256-GCM128]="256 bit AES-GCM with 128 bit ICV"
  43         [AES192-GCM128]="192 bit AES-GCM with 128 bit ICV"
  44         [AES128-GCM128]="128 bit AES-GCM with 128 bit ICV"
  45         [AES256-GCM96]="256 bit AES-GCM with 96 bit ICV"
  46         [AES192-GCM96]="192 bit AES-GCM with 96 bit ICV"
  47         [AES128-GCM96]="128 bit AES-GCM with 96 bit ICV"
  48         [AES256-GCM64]="256 bit AES-GCM with 64 bit ICV"
  49         [AES192-GCM64]="192 bit AES-GCM with 64 bit ICV"
  50         [AES128-GCM64]="128 bit AES-GCM with 64 bit ICV"
  51
  52         # AES-CCM
  53         [AES256-CCM128]="256 bit AES-CCM with 128 bit ICV"
  54         [AES192-CCM128]="192 bit AES-CCM with 128 bit ICV"
  55         [AES128-CCM128]="128 bit AES-CCM with 128 bit ICV"
  56         [AES256-CCM96]="256 bit AES-CCM with 96 bit ICV"
  57         [AES192-CCM96]="192 bit AES-CCM with 96 bit ICV"
  58         [AES128-CCM96]="128 bit AES-CCM with 96 bit ICV"
  59         [AES256-CCM64]="256 bit AES-CCM with 64 bit ICV"
  60         [AES192-CCM64]="192 bit AES-CCM with 64 bit ICV"
  61         [AES128-CCM64]="128 bit AES-CCM with 64 bit ICV"
  62
  63         # CAMELLIA-CBC
  64         [CAMELLIA256-CBC]="256 bit CAMELLIA-CBC"
  65         [CAMELLIA192-CBC]="192 bit CAMELLIA-CBC"
  66         [CAMELLIA128-CBC]="128 bit CAMELLIA-CBC"
  67
  68         # CAMELLIA-CTR
  69         [CAMELLIA256-CTR]="256 bit CAMELLIA-COUNTER"
  70         [CAMELLIA192-CTR]="192 bit CAMELLIA-COUNTER"
  71         [CAMELLIA128-CTR]="128 bit CAMELLIA-COUNTER"
  72
  73         # CAMELLIA-GCM
  74         [CAMELLIA256-GCM128]="256 bit CAMELLIA-GCM with 128 bit ICV"
  75         [CAMELLIA192-GCM128]="192 bit CAMELLIA-GCM with 128 bit ICV"
  76         [CAMELLIA128-GCM128]="128 bit CAMELLIA-GCM with 128 bit ICV"
  77         [CAMELLIA256-GCM96]="256 bit CAMELLIA-GCM with 96 bit ICV"
  78         [CAMELLIA192-GCM96]="192 bit CAMELLIA-GCM with 96 bit ICV"
  79         [CAMELLIA128-GCM96]="128 bit CAMELLIA-GCM with 96 bit ICV"
  80         [CAMELLIA256-GCM64]="256 bit CAMELLIA-GCM with 64 bit ICV"
  81         [CAMELLIA192-GCM64]="192 bit CAMELLIA-GCM with 64 bit ICV"
  82         [CAMELLIA128-GCM64]="128 bit CAMELLIA-GCM with 64 bit ICV"
  83
  84         # CAMELLIA-CCM
  85         [CAMELLIA256-CCM128]="256 bit CAMELLIA-CCM with 128 bit ICV"
  86         [CAMELLIA192-CCM128]="192 bit CAMELLIA-CCM with 128 bit ICV"
  87         [CAMELLIA128-CCM128]="128 bit CAMELLIA-CCM with 128 bit ICV"
  88         [CAMELLIA256-CCM96]="256 bit CAMELLIA-CCM with 96 bit ICV"
  89         [CAMELLIA192-CCM96]="192 bit CAMELLIA-CCM with 96 bit ICV"
  90         [CAMELLIA128-CCM96]="128 bit CAMELLIA-CCM with 96 bit ICV"
  91         [CAMELLIA256-CCM64]="256 bit CAMELLIA-CCM with 64 bit ICV"
  92         [CAMELLIA192-CCM64]="192 bit CAMELLIA-CCM with 64 bit ICV"
  93         [CAMELLIA128-CCM64]="128 bit CAMELLIA-CCM with 64 bit ICV"
  94 )
  95
  96 declare -A VPN_SUPPORTED_INTEGRITY=(
  97         [MD5]="MD5-HMAC"
  98
  99         # SHA
 100         [SHA1]="SHA1-HMAC"
 101         [SHA512]="256 bit SHA2-HMAC"
 102         [SHA384]="384 bit SHA2-HMAC"
 103         [SHA256]="256 bit SHA2-HMAC"
 104
 105         # AES
 106         [AES-XCBC]="AES-XCBC"
 107         [AES-CMAC]="AES-CMAC"
 108         [AES256-GMAC]="256 bit AES-GMAC"
 109         [AES192-GMAC]="192 bit AES-GMAC"
 110         [AES128-GMAC]="128 bit AES-GMAC"
 111 )
 112
 113 VPN_SUPPORTED_GROUP_TYPES="MODP8192 MODP4096"
 114
 115 # This functions checks if a policy is readonly
 116 # returns true when yes and false when no
 117 vpn_security_policies_check_readonly() {
 118         if isoneof name ${VPN_SECURITY_POLICIES_READONLY}; then
 119                 return ${EXIT_TRUE}
 120         else
 121                 return ${EXIT_FALSE}
 122         fi
 123 }
 124
 125 # This function writes all values to a via ${name} specificated vpn security policy configuration file
 126 vpn_security_policies_write_config() {
 127         assert [ $# -ge 1 ]
 128
 129         local name="${1}"
 130
 131         if ! vpn_security_policy_exists "${name}"; then
 132                 log ERROR "No such vpn security policy: ${name}"
 133                 return ${EXIT_ERROR}
 134         fi
 135
 136         if vpn_security_policies_check_readonly "${name}"; then
 137                 log ERROR "The ${name} vpn security policy cannot be changed."
 138                 return ${EXIT_ERROR}
 139         fi
 140
 141         local path="$(vpn_security_policies_path "${name}")"
 142         if [ ! -w ${path} ]; then
 143                 log ERROR "${path} is not writeable"
 144                 return ${EXIT_ERROR}
 145         fi
 146
 147         if ! settings_write "${path}" ${VPN_SECURITY_POLICIES_CONFIG_SETTINGS}; then
 148                 log ERROR "Could not write configuration settings for vpn security policy ${name}"
 149                 return ${EXIT_ERROR}
 150         fi
 151
 152         # TODO everytime we successfully write a config we should call some trigger to take the changes into effect
 153 }
 154
 155 # This funtion writes the value for one key to a via ${name} specificated vpn security policy configuration file
 156 vpn_security_policies_write_config_key() {
 157         assert [ $# -ge 3 ]
 158
 159         local name=${1}
 160         local key=${2}
 161         shift 2
 162
 163         local value="$@"
 164
 165         if ! vpn_security_policy_exists "${name}"; then
 166                 log ERROR "No such vpn security policy: ${name}"
 167                 return ${EXIT_ERROR}
 168         fi
 169
 170         log DEBUG "Set '${key}' to new value '${value}' in vpn security policy ${name}"
 171
 172         local ${VPN_SECURITY_POLICIES_CONFIG_SETTINGS}
 173
 174         # Read the config settings
 175         if ! vpn_security_policies_read_config "${name}"; then
 176                 return ${EXIT_ERROR}
 177         fi
 178
 179         # Set the key to a new value
 180         assign "${key}" "${value}"
 181
 182         if ! vpn_security_policies_write_config "${name}"; then
 183                 return ${EXIT_ERROR}
 184         fi
 185
 186         return ${EXIT_TRUE}
 187 }
 188
 189 # Reads one or more keys out of a settings file or all if no key is provided.
 190 vpn_security_policies_read_config() {
 191         assert [ $# -ge 1 ]
 192
 193         local name="${1}"
 194         shift 1
 195
 196         if ! vpn_security_policy_exists "${name}"; then
 197                 log ERROR "No such vpn security policy: ${name}"
 198                 return ${EXIT_ERROR}
 199         fi
 200
 201
 202         local args
 203         if [ $# -eq 0 ] && [ -n "${VPN_SECURITY_POLICIES_CONFIG_SETTINGS}" ]; then
 204                 list_append args ${VPN_SECURITY_POLICIES_CONFIG_SETTINGS}
 205         else
 206                 list_append args $@
 207         fi
 208
 209         local path="$(vpn_security_policies_path ${name})"
 210
 211         if ! settings_read "${path}" ${args}; then
 212                 log ERROR "Could not read settings for vpn security policy ${name}"
 213                 return ${EXIT_ERROR}
 214         fi
 215 }
 216
 217 # Returns the path to a the configuration fora given name
 218 vpn_security_policies_path() {
 219         assert [ $# -eq 1 ]
 220
 221         local name=${1}
 222
 223         if vpn_security_policies_check_readonly "${name}"; then
 224                 echo "${NETWORK_SHARE_DIR}/vpn/security-policies/${name}"
 225         else
 226                 echo "${NETWORK_CONFIG_DIR}/vpn/security-policies/${name}"
 227         fi
 228 }
 229
 230 # Print the content of a vpn security policy configuration file in a nice way
 231 vpn_security_policies_show() {
 232         assert [ $# -eq 1 ]
 233
 234         local name=${1}
 235
 236         local ${VPN_SECURITY_POLICIES_CONFIG_SETTINGS}
 237         if ! vpn_security_policies_read_config ${name}; then
 238                 return ${EXIT_ERROR}
 239         fi
 240
 241         cli_print_fmt1 0 "Security Policy: ${name}"
 242         cli_space
 243
 244         # This could be done in a loop but a loop is much more complicated
 245         # because we print 'Group Types' but the variable is named 'GROUP_TYPES'
 246         cli_print_fmt1 1 "Ciphers:"
 247
 248         local cipher
 249         for cipher in ${CIPHER}; do
 250                 cli_print_fmt1 2 "${VPN_SUPPORTED_CIPHERS[${cipher}]-${cipher}}"
 251         done
 252         cli_space
 253
 254         cli_print_fmt1 1 "Integrity:"
 255         cli_print_fmt1 2 "${INTEGRITY}"
 256         cli_space
 257
 258         cli_print_fmt1 1 "Group Types:"
 259         cli_print_fmt1 2 "${GROUP_TYPE}"
 260         cli_space
 261
 262         cli_print_fmt1 1 "Key Exchange:" "${KEY_EXCHANGE}"
 263
 264         # Key Lifetime
 265         if isinteger LIFETIME && [ ${LIFETIME} -gt 0 ]; then
 266                 cli_print_fmt1 1 "Key Lifetime:" "$(format_time ${LIFETIME})"
 267         else
 268                 log ERROR "The value for Key Lifetime is not a valid integer greater zero."
 269         fi
 270
 271         # PFS
 272         if enabled PFS; then
 273                 cli_print_fmt1 1 "Perfect Forward Secrecy:" "enabled"
 274         else
 275                 cli_print_fmt1 1 "Perfect Forward Secrecy:" "disabled"
 276         fi
 277         cli_space
 278
 279         # Compression
 280         if enabled COMPRESSION; then
 281                 cli_print_fmt1 1 "Compression:" "enabled"
 282         else
 283                 cli_print_fmt1 1 "Compression:" "disabled"
 284         fi
 285         cli_space
 286 }
 287
 288 # This function checks if a vpn security policy exists
 289 # Returns True when yes and false when not
 290 vpn_security_policy_exists() {
 291         assert [ $# -eq 1 ]
 292
 293         local name=${1}
 294
 295         local path=$(vpn_security_policies_path "${name}")
 296
 297         [ -f ${path} ] && return ${EXIT_TRUE} || return ${EXIT_FALSE}
 298 }
 299
 300
 301 # This function parses the parameters for the 'cipher' command
 302 vpn_security_policies_cipher(){
 303         local name=${1}
 304         shift
 305
 306         if [ $# -eq 0 ]; then
 307                 log ERROR "You must pass at least one value after cipher"
 308                 return ${EXIT_ERROR}
 309         fi
 310
 311         local CIPHER
 312         if ! vpn_security_policies_read_config ${name} "CIPHER"; then
 313                 return ${EXIT_ERROR}
 314         fi
 315
 316         # Remove duplicated entries to proceed the list safely
 317         CIPHER="$(list_unique ${CIPHER})"
 318
 319         while [ $# -gt 0 ]; do
 320                 case "${1}" in
 321                         -*)
 322                                 value=${1#-}
 323                                 # Check if the cipher is in the list of ciphers and
 324                                 # check if the list has after removing this cipher at least one valid value
 325                                 if list_match ${value} ${CIPHER}; then
 326                                         list_remove CIPHER ${value}
 327                                 else
 328                                         # We do not break here because this error does not break the processing of the next maybe valid values.
 329                                         log ERROR "Can not remove ${value} from the list of Ciphers because ${value} is not in the list."
 330                                 fi
 331                                 ;;
 332                         +*)
 333                                 value=${1#+}
 334                                 # Check if the Ciphers is in the list of supported ciphers.
 335                                 if ! isoneof value ${!VPN_SUPPORTED_CIPHERS[@]}; then
 336                                         # We do not break here because this error does not break the processing of the next maybe valid values.
 337                                         log ERROR "${value} is not a supported cipher and can thats why not added to the list of ciphers."
 338                                 else
 339                                         if list_match ${value} ${CIPHER}; then
 340                                                 log WARNING "${value} is already in the list of ciphers of this policy."
 341                                         else
 342                                                 list_append CIPHER ${value}
 343                                         fi
 344                                 fi
 345                                 ;;
 346                 esac
 347                 shift
 348         done
 349
 350         # Check if the list contain at least one valid cipher
 351         if [ $(list_length ${CIPHER}) -ge 1 ]; then
 352                 if ! vpn_security_policies_write_config_key ${name} "CIPHER" ${CIPHER}; then
 353                         log ERROR "The changes for the vpn security policy ${name} could not be written."
 354                 fi
 355         else
 356                 log ERROR "After proceding all ciphers the list is empty and thats why no changes are written."
 357                 return ${EXIT_ERROR}
 358         fi
 359 }
 360
 361 # This function parses the parameters for the 'compression' command
 362 vpn_security_policies_compression(){
 363         local name=${1}
 364         local value=${2}
 365
 366         # Check if we get only one argument after compression <name>
 367         if [ ! $# -eq 2 ]; then
 368                 log ERROR "The number of arguments do not match. Only one argument after compression is allowed."
 369                 return ${EXIT_ERROR}
 370         fi
 371
 372         if ! isbool value; then
 373                 # We suggest only two values to avoid overburding the user.
 374                 log ERROR "Invalid Argument ${value}"
 375                 return ${EXIT_ERROR}
 376         fi
 377
 378         vpn_security_policies_write_config_key "${name}" "COMPRESSION" "${value}"
 379 }
 380
 381 # This function parses the parameters for the 'group-type' command
 382 vpn_security_policies_group_type(){
 383         local name=${1}
 384         shift
 385
 386         if [ $# -eq 0 ]; then
 387                 log ERROR "You must pass at least one value after group-type"
 388                 return ${EXIT_ERROR}
 389         fi
 390
 391         local GROUP_TYPE
 392         if ! vpn_security_policies_read_config ${name} "GROUP_TYPE"; then
 393                 return ${EXIT_ERROR}
 394         fi
 395
 396         # Remove duplicated entries to proceed the list safely
 397         GROUP_TYPE="$(list_unique ${GROUP_TYPE})"
 398
 399         while [ $# -gt 0 ]; do
 400                 case "${1}" in
 401                         -*)
 402                                 value=${1#-}
 403                                 # Check if the group type is in the list of group types and
 404                                 # check if the list has after removing this group type at leatst one valid value
 405                                 if list_match ${value} ${GROUP_TYPE}; then
 406                                         list_remove GROUP_TYPE ${value}
 407                                 else
 408                                         # We do not break here because this error does not break the processing of the next maybe valid values.
 409                                         log ERROR "Can not remove ${value} from the list of group types because ${value} is not in the list."
 410                                 fi
 411                                 ;;
 412                         +*)
 413                                 value=${1#+}
 414                                 # Check if the group type is in the list of supported group types.
 415                                 if ! isoneof value ${VPN_SUPPORTED_GROUP_TYPES}; then
 416                                         # We do not break here because the processing of other maybe valid values are indepent from this error.
 417                                         log ERROR "${value} is not a supported group type and can thats why not added to the list of group types."
 418                                 else
 419                                         if list_match ${value} ${GROUP_TYPE}; then
 420                                                 log WARNING "${value} is already in the list of group-types of this policy."
 421                                         else
 422                                                 list_append GROUP_TYPE ${value}
 423                                         fi
 424                                 fi
 425                                 ;;
 426                 esac
 427                 shift
 428         done
 429
 430         # Check if the list contain at least one valid group-type
 431         if [ $(list_length ${GROUP_TYPE}) -ge 1 ]; then
 432                 if ! vpn_security_policies_write_config_key ${name} "GROUP_TYPE" ${GROUP_TYPE}; then
 433                         log ERROR "The changes for the vpn security policy ${name} could not be written."
 434                 fi
 435         else
 436                 log ERROR "After proceding all group types the list is empty and thats why no changes are written."
 437                 return ${EXIT_ERROR}
 438         fi
 439 }
 440
 441 # This function parses the parameters for the 'integrity' command
 442 vpn_security_policies_integrity(){
 443         local name=${1}
 444         shift
 445
 446         if [ $# -eq 0 ]; then
 447                 log ERROR "You must pass at least one value after integrity."
 448                 return ${EXIT_ERROR}
 449         fi
 450
 451         local INTEGRITY
 452         if ! vpn_security_policies_read_config ${name} "INTEGRITY"; then
 453                 return ${EXIT_ERROR}
 454         fi
 455
 456         # Remove duplicated entries to proceed the list safely
 457         INTEGRITY="$(list_unique ${INTEGRITY})"
 458
 459         while [ $# -gt 0 ]; do
 460                 case "${1}" in
 461                         -*)
 462                                 value=${1#-}
 463                                 # Check if the integrity hash is in the list of integrity hashes and
 464                                 # check if the list has after removing this  integrity hash at least one valid value
 465                                 if list_match ${value} ${INTEGRITY}; then
 466                                         list_remove INTEGRITY ${value}
 467                                 else
 468                                         # We do not break here because the processing of other maybe valid values are indepent from this error.
 469                                         log ERROR "Can not remove ${value} from the list of integrity hashes because ${value} is not in the list."
 470                                 fi
 471                                 ;;
 472                         +*)
 473                                 value=${1#+}
 474                                 # Check if the Ciphers is in the list of supported integrity hashes.
 475                                 if ! isoneof value ${!VPN_SUPPORTED_INTEGRITY[@]}; then
 476                                         # We do not break here because the processing of other maybe valid values are indepent from this error.
 477                                         log ERROR "${value} is not a supported integrity hash and can thats why not added to the list of integrity hashes."
 478                                 else
 479                                         if list_match ${value} ${INTEGRITY}; then
 480                                                 log WARNING "${value} is already in the list of integrety hashes of this policy."
 481                                         else
 482                                                 list_append INTEGRITY ${value}
 483                                         fi
 484                                 fi
 485                                 ;;
 486                 esac
 487                 shift
 488         done
 489
 490         # Check if the list contain at least one valid group-type
 491         if [ $(list_length ${INTEGRITY}) -ge 1 ]; then
 492                 if ! vpn_security_policies_write_config_key ${name} "INTEGRITY" ${INTEGRITY}; then
 493                         log ERROR "The changes for the vpn security policy ${name} could not be written."
 494                 fi
 495         else
 496                 log ERROR "After proceding all integrity hashes the list is empty and thats why no changes are written."
 497                 return ${EXIT_ERROR}
 498         fi
 499 }
 500
 501 # This function parses the parameters for the 'key-exchange' command
 502 vpn_security_policies_key_exchange() {
 503         local name=${1}
 504         local value=${2}
 505
 506         # Check if we get only one argument after key-exchange <name>
 507         if [ ! $# -eq 2 ]; then
 508                 log ERROR "The number of arguments do not match. Only argument after key-exchange is allowed."
 509                 return ${EXIT_ERROR}
 510         fi
 511
 512         if ! isoneof value "ikev1" "ikev2" "IKEV1" "IKEV2"; then
 513                 log ERROR "Invalid Argument ${value}"
 514                 return ${EXIT_ERROR}
 515         fi
 516
 517         vpn_security_policies_write_config_key "${name}" "KEY_EXCHANGE" "${value,,}"
 518 }
 519
 520 # This function parses the parameters for the 'lifetime' command.
 521 vpn_security_policies_lifetime(){
 522         local name=${1}
 523         shift
 524
 525         local value=$@
 526
 527         # Check if we get only one argument after lifetime <name>
 528         if [ ! $# -ge 1 ]; then
 529                 log ERROR "The number of arguments do not match you must provide at least one integer value or a valid time with the format  <hours>h <minutes>m <seconds>s"
 530                 return ${EXIT_ERROR}
 531         fi
 532
 533         if ! isinteger value; then
 534                 value=$(parse_time $@)
 535                 if [ ! $? -eq 0 ]; then
 536                         log ERROR "Parsing the passed time was not sucessful please check the passed values."
 537                         return ${EXIT_ERROR}
 538                 fi
 539         fi
 540
 541         if [ ${value} -le 0 ]; then
 542                 log ERROR "The passed time value must be in the sum greater zero seconds."
 543                 return ${EXIT_ERROR}
 544         fi
 545
 546         vpn_security_policies_write_config_key "${name}" "LIFETIME" "${value}"
 547 }
 548
 549 # This function parses the parameters for the 'pfs' command
 550 vpn_security_policies_pfs(){
 551         local name=${1}
 552         local value=${2}
 553
 554         # Check if we get only one argument after pfs <name>
 555         if [ ! $# -eq 2 ]; then
 556                 log ERROR "The number of arguments do not match. Only argument after pfs is allowed."
 557                 return ${EXIT_ERROR}
 558         fi
 559
 560         if [ ! $# -eq 2 ] || ! isbool value; then
 561                 # We suggest only two values to avoid overburding the user.
 562                 log ERROR "Invalid Argument ${value}"
 563                 return ${EXIT_ERROR}
 564         fi
 565
 566         vpn_security_policies_write_config_key "${name}" "PFS" "${value}"
 567 }
 568
 569 # This function checks if a vpn security policy name is valid
 570 # Allowed are only A-Za-z0-9
 571 vpn_security_policies_check_name() {
 572         assert [ $# -eq 1 ]
 573
 574         local name=${1}
 575
 576         [[ ${name} =~ [^[:alnum:]$] ]]
 577 }
 578
 579 # Function that creates based on the paramters one ore more new vpn security policies
 580 vpn_security_policies_new() {
 581         if [ $# -gt 1 ]; then
 582                 error "Too many arguments"
 583                 return ${EXIT_ERROR}
 584         fi
 585
 586         local name="${1}"
 587         if ! isset name; then
 588                 error "Please provide a name"
 589                 return ${EXIT_ERROR}
 590         fi
 591
 592         # Check for duplicates
 593         if vpn_security_policy_exists "${name}"; then
 594                 error "The VPN security policy with name ${name} already exists"
 595                 return ${EXIT_ERROR}
 596         fi
 597
 598         # Check if name is valid
 599         if  vpn_security_policies_check_name "${name}"; then
 600                 error "'${name}' contains illegal characters"
 601                 return ${EXIT_ERROR}
 602         fi
 603
 604         # Check if we have a read-only policy with the same name
 605         if vpn_security_policies_check_readonly "${name}"; then
 606                 error "The VPN security policy ${name} is read-only"
 607                 return ${EXIT_ERROR}
 608         fi
 609
 610         # Check if our source policy exists
 611         if ! vpn_security_policy_exists "${VPN_DEFAULT_SECURITY_POLICY}"; then
 612                 error "Default VPN Security Policy '${VPN_DEFAULT_SECURITY_POLICY}' does not exist"
 613                 return ${EXIT_ERROR}
 614         fi
 615
 616         log DEBUG "Creating VPN Security Policy ${name}"
 617
 618         if copy "$(vpn_security_policies_path "${VPN_DEFAULT_SECURITY_POLICY}")"
 619                         "$(vpn_security_policies_path ${name})"; then
 620                 log INFO "VPN Security Policy ${name} successfully created"
 621         else
 622                 log ERROR "Could not create VPN Security Policy ${name}"
 623                 return ${EXIT_ERROR}
 624         fi
 625
 626         # Show the newly created policy
 627         vpn_security_policies_show "${name}"
 628 }
 629
 630 # Function that deletes based on the passed parameters one ore more vpn security policies
 631 vpn_security_policies_destroy() {
 632         local name
 633         for name in $@; do
 634                 if ! vpn_security_policy_exists ${name}; then
 635                         log ERROR "The vpn security policy ${name} does not exist."
 636                         continue
 637                 fi
 638
 639                 if vpn_security_policies_check_readonly ${name}; then
 640                         log ERROR "The vpn security policy ${name} cannot be deleted."
 641                         continue
 642                 fi
 643
 644                 log DEBUG "Deleting vpn security policy ${name}"
 645                 settings_remove $(vpn_security_policies_path ${name})
 646         done
 647 }