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="CIPHERS COMPRESSION GROUP_TYPES \
  23         INTEGRITIES PSEUDO_RANDOM_FUNCTIONS KEY_EXCHANGE LIFETIME PFS"
  24 VPN_SECURITY_POLICIES_READONLY="system performance"
  25
  26 VPN_DEFAULT_SECURITY_POLICY="system"
  27
  28 declare -A VPN_SUPPORTED_CIPHERS=(
  29         # 3DES-CBC
  30         [3DES-CBC]="168 bit 3DES-EDE-CBC"
  31
  32         # AES-CBC
  33         [AES256-CBC]="256 bit AES-CBC"
  34         [AES192-CBC]="192 bit AES-CBC"
  35         [AES128-CBC]="128 bit AES-CBC"
  36
  37         # AES-CTR
  38         [AES256-CTR]="256 bit AES-COUNTER"
  39         [AES192-CTR]="192 bit AES-COUNTER"
  40         [AES128-CTR]="128 bit AES-COUNTER"
  41
  42         # AES-GCM
  43         [AES256-GCM128]="256 bit AES-GCM with 128 bit ICV"
  44         [AES192-GCM128]="192 bit AES-GCM with 128 bit ICV"
  45         [AES128-GCM128]="128 bit AES-GCM with 128 bit ICV"
  46         [AES256-GCM96]="256 bit AES-GCM with 96 bit ICV"
  47         [AES192-GCM96]="192 bit AES-GCM with 96 bit ICV"
  48         [AES128-GCM96]="128 bit AES-GCM with 96 bit ICV"
  49         [AES256-GCM64]="256 bit AES-GCM with 64 bit ICV"
  50         [AES192-GCM64]="192 bit AES-GCM with 64 bit ICV"
  51         [AES128-GCM64]="128 bit AES-GCM with 64 bit ICV"
  52
  53         # AES-CCM
  54         [AES256-CCM128]="256 bit AES-CCM with 128 bit ICV"
  55         [AES192-CCM128]="192 bit AES-CCM with 128 bit ICV"
  56         [AES128-CCM128]="128 bit AES-CCM with 128 bit ICV"
  57         [AES256-CCM96]="256 bit AES-CCM with 96 bit ICV"
  58         [AES192-CCM96]="192 bit AES-CCM with 96 bit ICV"
  59         [AES128-CCM96]="128 bit AES-CCM with 96 bit ICV"
  60         [AES256-CCM64]="256 bit AES-CCM with 64 bit ICV"
  61         [AES192-CCM64]="192 bit AES-CCM with 64 bit ICV"
  62         [AES128-CCM64]="128 bit AES-CCM with 64 bit ICV"
  63
  64         # CAMELLIA-CBC
  65         [CAMELLIA256-CBC]="256 bit CAMELLIA-CBC"
  66         [CAMELLIA192-CBC]="192 bit CAMELLIA-CBC"
  67         [CAMELLIA128-CBC]="128 bit CAMELLIA-CBC"
  68
  69         # CAMELLIA-CTR
  70         [CAMELLIA256-CTR]="256 bit CAMELLIA-COUNTER"
  71         [CAMELLIA192-CTR]="192 bit CAMELLIA-COUNTER"
  72         [CAMELLIA128-CTR]="128 bit CAMELLIA-COUNTER"
  73
  74         # CAMELLIA-GCM
  75         [CAMELLIA256-GCM128]="256 bit CAMELLIA-GCM with 128 bit ICV"
  76         [CAMELLIA192-GCM128]="192 bit CAMELLIA-GCM with 128 bit ICV"
  77         [CAMELLIA128-GCM128]="128 bit CAMELLIA-GCM with 128 bit ICV"
  78         [CAMELLIA256-GCM96]="256 bit CAMELLIA-GCM with 96 bit ICV"
  79         [CAMELLIA192-GCM96]="192 bit CAMELLIA-GCM with 96 bit ICV"
  80         [CAMELLIA128-GCM96]="128 bit CAMELLIA-GCM with 96 bit ICV"
  81         [CAMELLIA256-GCM64]="256 bit CAMELLIA-GCM with 64 bit ICV"
  82         [CAMELLIA192-GCM64]="192 bit CAMELLIA-GCM with 64 bit ICV"
  83         [CAMELLIA128-GCM64]="128 bit CAMELLIA-GCM with 64 bit ICV"
  84
  85         # CAMELLIA-CCM
  86         [CAMELLIA256-CCM128]="256 bit CAMELLIA-CCM with 128 bit ICV"
  87         [CAMELLIA192-CCM128]="192 bit CAMELLIA-CCM with 128 bit ICV"
  88         [CAMELLIA128-CCM128]="128 bit CAMELLIA-CCM with 128 bit ICV"
  89         [CAMELLIA256-CCM96]="256 bit CAMELLIA-CCM with 96 bit ICV"
  90         [CAMELLIA192-CCM96]="192 bit CAMELLIA-CCM with 96 bit ICV"
  91         [CAMELLIA128-CCM96]="128 bit CAMELLIA-CCM with 96 bit ICV"
  92         [CAMELLIA256-CCM64]="256 bit CAMELLIA-CCM with 64 bit ICV"
  93         [CAMELLIA192-CCM64]="192 bit CAMELLIA-CCM with 64 bit ICV"
  94         [CAMELLIA128-CCM64]="128 bit CAMELLIA-CCM with 64 bit ICV"
  95
  96         # DJB
  97         [CHACHA20-POLY1305]="256 bit ChaCha20/Poly1305 with 128 bit ICV"
  98
  99         # No Encryption
 100         [NULL]="No Encryption"
 101 )
 102
 103 declare -A CIPHER_TO_STRONGSWAN=(
 104         # 3DES-CBC
 105         [3DES-CBC]="3des"
 106
 107         # AES-CBC
 108         [AES256-CBC]="aes256"
 109         [AES192-CBC]="aes192"
 110         [AES128-CBC]="aes128"
 111
 112         # AES-CTR
 113         [AES256-CTR]="aes256ctr"
 114         [AES192-CTR]="aes192ctr"
 115         [AES128-CTR]="aes128ctr"
 116
 117         # AES-GCM
 118         [AES256-GCM128]="aes256gcm128"
 119         [AES192-GCM128]="aes192gcm128"
 120         [AES128-GCM128]="aes128gcm128"
 121         [AES256-GCM96]="aes256gcm96"
 122         [AES192-GCM96]="aes192gcm96"
 123         [AES128-GCM96]="aes128gcm96"
 124         [AES256-GCM64]="aes256gcm64"
 125         [AES192-GCM64]="aes192gcm64"
 126         [AES128-GCM64]="aes128gcm64"
 127
 128         # AES-CCM
 129         [AES256-CCM128]="aes256ccm128"
 130         [AES192-CCM128]="aes192ccm128"
 131         [AES128-CCM128]="aes128ccm128"
 132         [AES256-CCM96]="aes256ccm96"
 133         [AES192-CCM96]="aes192ccm96"
 134         [AES128-CCM96]="aes128ccm96"
 135         [AES256-CCM64]="aes256ccm64"
 136         [AES192-CCM64]="aes192ccm64"
 137         [AES128-CCM64]="aes128ccm64"
 138
 139         # CAMELLIA-CBC
 140         [CAMELLIA256-CBC]="camellia256"
 141         [CAMELLIA192-CBC]="camellia192"
 142         [CAMELLIA128-CBC]="camellia128"
 143
 144         # CAMELLIA-CTR
 145         [CAMELLIA256-CTR]="camellia256ctr"
 146         [CAMELLIA192-CTR]="camellia192ctr"
 147         [CAMELLIA128-CTR]="camellia128ctr"
 148
 149         # CAMELLIA-GCM
 150         [CAMELLIA256-GCM128]="camellia256gcm128"
 151         [CAMELLIA192-GCM128]="camellia192gcm128"
 152         [CAMELLIA128-GCM128]="camellia128gcm128"
 153         [CAMELLIA256-GCM96]="camellia256gcm96"
 154         [CAMELLIA192-GCM96]="camellia192gcm96"
 155         [CAMELLIA128-GCM96]="camellia128gcm96"
 156         [CAMELLIA256-GCM64]="camellia256gcm64"
 157         [CAMELLIA192-GCM64]="camellia192gcm64"
 158         [CAMELLIA128-GCM64]="camellia128gcm64"
 159
 160         # CAMELLIA-CCM
 161         [CAMELLIA256-CCM128]="camellia256ccm128"
 162         [CAMELLIA192-CCM128]="camellia192ccm128"
 163         [CAMELLIA128-CCM128]="camellia128ccm128"
 164         [CAMELLIA256-CCM96]="camellia256ccm96"
 165         [CAMELLIA192-CCM96]="camellia192ccm96"
 166         [CAMELLIA128-CCM96]="camellia128ccm96"
 167         [CAMELLIA256-CCM64]="camellia256ccm64"
 168         [CAMELLIA192-CCM64]="camellia192ccm64"
 169         [CAMELLIA128-CCM64]="camellia128ccm64"
 170
 171         # DJB
 172         [CHACHA20-POLY1305]="chacha20poly1305"
 173
 174         # No Encryption
 175         [NULL]="null"
 176 )
 177
 178 declare -A VPN_SUPPORTED_PSEUDO_RANDOM_FUNCTIONS=(
 179         [MD5]="MD5"
 180
 181         # SHA
 182         [SHA1]="SHA1"
 183         [SHA256]="SHA256"
 184         [SHA384]="SHA384"
 185         [SHA512]="SHA512"
 186
 187         # AES
 188         [AES-XCBC]="AES-XCBC"
 189         [AES-CMAC]="AES-CMAC"
 190 )
 191
 192 declare -A PSEUDO_RANDOM_FUNCTION_TO_STRONGSWAN=(
 193         [MD5]="prfmd5"
 194
 195         # SHA
 196         [SHA1]="prfsha1"
 197         [SHA256]="prfsha256"
 198         [SHA384]="prfsha384"
 199         [SHA512]="prfsha512"
 200
 201         # AES
 202         [AES-XCBC]="prfaesxcbc"
 203         [AES-CMAC]="prfaescmac"
 204 )
 205
 206 declare -A VPN_SUPPORTED_INTEGRITIES=(
 207         [MD5]="MD5-HMAC"
 208
 209         # SHA
 210         [SHA1]="SHA1-HMAC"
 211         [SHA512]="512 bit SHA2-HMAC"
 212         [SHA384]="384 bit SHA2-HMAC"
 213         [SHA256]="256 bit SHA2-HMAC"
 214
 215         # AES
 216         [AES-XCBC]="AES-XCBC"
 217         [AES-CMAC]="AES-CMAC"
 218         [AES256-GMAC]="256 bit AES-GMAC"
 219         [AES192-GMAC]="192 bit AES-GMAC"
 220         [AES128-GMAC]="128 bit AES-GMAC"
 221 )
 222
 223 declare -A INTEGRITY_TO_STRONGSWAN=(
 224         [MD5]="md5"
 225
 226         # SHA
 227         [SHA1]="sha1"
 228         [SHA512]="sha512"
 229         [SHA384]="sha384"
 230         [SHA256]="sha256"
 231
 232         # AES
 233         [AES-XCBC]="aesxcbc"
 234         [AES-CMAC]="aescmac"
 235         [AES256-GMAC]="aes256gmac"
 236         [AES192-GMAC]="aes192gmac"
 237         [AES128-GMAC]="aes128gmac"
 238 )
 239
 240 declare -A VPN_SUPPORTED_GROUP_TYPES=(
 241         # Regular Groups
 242         [MODP768]="768 bit Modulo Prime Group"
 243         [MODP1024]="1024 bit Modulo Prime Group"
 244         [MODP1536]="1536 bit Modulo Prime Group"
 245         [MODP2048]="2048 bit Modulo Prime Group"
 246         [MODP3072]="3072 bit Modulo Prime Group"
 247         [MODP4096]="4096 bit Modulo Prime Group"
 248         [MODP6144]="6144 bit Modulo Prime Group"
 249         [MODP8192]="8192 bit Modulo Prime Group"
 250
 251         # NIST Elliptic Curve Groups
 252         [ECP192]="192 bit NIST Elliptic Curve Group"
 253         [ECP224]="224 bit NIST Elliptic Curve Group"
 254         [ECP256]="256 bit NIST Elliptic Curve Group"
 255         [ECP384]="384 bit NIST Elliptic Curve Group"
 256         [ECP521]="521 bit NIST Elliptic Curve Group"
 257
 258         # Brainpool Elliptic Curve Groups
 259         [ECP224BP]="224 bit Brainpool Elliptic Curve Group"
 260         [ECP256BP]="256 bit Brainpool Elliptic Curve Group"
 261         [ECP384BP]="384 bit Brainpool Elliptic Curve Group"
 262         [ECP512BP]="512 bit Brainpool Elliptic Curve Group"
 263
 264         # Curve25519
 265         [CURVE25519]="256 bit Elliptic Curve 25519"
 266 )
 267
 268 declare -A GROUP_TYPE_TO_STRONGSWAN=(
 269         # Regular Groups
 270         [MODP768]="modp768"
 271         [MODP1024]="modp1024"
 272         [MODP1536]="modp1536"
 273         [MODP2048]="modp2048"
 274         [MODP3072]="modp3072"
 275         [MODP4096]="modp4096"
 276         [MODP6144]="modp6144"
 277         [MODP8192]="modp8192"
 278
 279         # NIST Elliptic Curve Groups
 280         [ECP192]="ecp192"
 281         [ECP224]="ecp224"
 282         [ECP256]="ecp256"
 283         [ECP384]="ecp384"
 284         [ECP521]="ecp521"
 285
 286         # Brainpool Elliptic Curve Groups
 287         [ECP224BP]="ecp224bp"
 288         [ECP256BP]="ecp256bp"
 289         [ECP384BP]="ecp384bp"
 290         [ECP512BP]="ecp512bp"
 291
 292         # Curve25519
 293         [CURVE25519]="curve25519"
 294 )
 295
 296 cli_vpn_security_policies() {
 297         local action
 298         local security_policy
 299
 300         if vpn_security_policy_exists ${1}; then
 301                 security_policy=${1}
 302                 key=${2}
 303                 shift 2
 304
 305                 case "${key}" in
 306                         ciphers|compression|integrities|lifetime|pfs|show)
 307                                 vpn_security_policies_${key} ${security_policy} "$@"
 308                                 ;;
 309                         pseudo-random-functions)
 310                                 vpn_security_policies_pseudo_random_functions "${security_policy}" "$@"
 311                                 ;;
 312                         group-types)
 313                                 vpn_security_policies_group_types ${security_policy} "$@"
 314                                 ;;
 315                         key-exchange)
 316                                 vpn_security_policies_key_exchange ${security_policy} "$@"
 317                                 ;;
 318                         *)
 319                                 error "Unrecognized argument: ${key}"
 320                                 exit ${EXIT_ERROR}
 321                                 ;;
 322                 esac
 323         else
 324                 action=${1}
 325                 shift
 326
 327                 case "${action}" in
 328                         new)
 329                                 vpn_security_policies_new "$@"
 330                                 ;;
 331                         destroy)
 332                                 vpn_security_policies_destroy "$@"
 333                                 ;;
 334                         ""|*)
 335                                 if [ -n "${action}" ]; then
 336                                         error "Unrecognized argument: '${action}'"
 337                                 fi
 338                                 exit ${EXIT_ERROR}
 339                                 ;;
 340                 esac
 341         fi
 342 }
 343
 344 # This functions checks if a policy is readonly
 345 # returns true when yes and false when no
 346 vpn_security_policies_check_readonly() {
 347         if isoneof name ${VPN_SECURITY_POLICIES_READONLY}; then
 348                 return ${EXIT_TRUE}
 349         else
 350                 return ${EXIT_FALSE}
 351         fi
 352 }
 353
 354 # This function writes all values to a via ${name} specificated vpn security policy configuration file
 355 vpn_security_policies_write_config() {
 356         assert [ $# -ge 1 ]
 357
 358         local name="${1}"
 359
 360         if ! vpn_security_policy_exists "${name}"; then
 361                 log ERROR "No such vpn security policy: ${name}"
 362                 return ${EXIT_ERROR}
 363         fi
 364
 365         if vpn_security_policies_check_readonly "${name}"; then
 366                 log ERROR "The ${name} vpn security policy cannot be changed."
 367                 return ${EXIT_ERROR}
 368         fi
 369
 370         local path="$(vpn_security_policies_path "${name}")"
 371         if [ ! -w ${path} ]; then
 372                 log ERROR "${path} is not writeable"
 373                 return ${EXIT_ERROR}
 374         fi
 375
 376         if ! settings_write "${path}" ${VPN_SECURITY_POLICIES_CONFIG_SETTINGS}; then
 377                 log ERROR "Could not write configuration settings for vpn security policy ${name}"
 378                 return ${EXIT_ERROR}
 379         fi
 380
 381         if ! vpn_security_policies_reload ${name}; then
 382                 log WARNING "Could not reload the IPsec connection using this security policy"
 383                 return ${EXIT_ERROR}
 384         fi
 385 }
 386
 387 # reload IPsec connections using a special policy
 388 vpn_security_policies_reload() {
 389         local name=${1}
 390
 391         local connection
 392         for connection in $(ipsec_list_connections); do
 393                 local SECURITY_POLICY ENABLED
 394
 395                 if ! ipsec_connection_read_config "${connection}" "SECURITY_POLICY"; then
 396                         continue
 397                 fi
 398
 399                 if [[ "${SECURITY_POLICY}" = "${name}" ]] && enabled ENABLED; then
 400                         if ! ipsec_connection_to_strongswan "${connection}"; then
 401                                 log ERROR "Could not generate strongswan config for ${connnection}"
 402                         fi
 403                 fi
 404         done
 405
 406         ipsec_strongswan_load
 407 }
 408
 409 # This funtion writes the value for one key to a via ${name} specificated vpn security policy configuration file
 410 vpn_security_policies_write_config_key() {
 411         assert [ $# -ge 3 ]
 412
 413         local name=${1}
 414         local key=${2}
 415         shift 2
 416
 417         local value="$@"
 418
 419         if ! vpn_security_policy_exists "${name}"; then
 420                 log ERROR "No such vpn security policy: ${name}"
 421                 return ${EXIT_ERROR}
 422         fi
 423
 424         log DEBUG "Set '${key}' to new value '${value}' in vpn security policy ${name}"
 425
 426         local ${VPN_SECURITY_POLICIES_CONFIG_SETTINGS}
 427
 428         # Read the config settings
 429         if ! vpn_security_policies_read_config "${name}"; then
 430                 return ${EXIT_ERROR}
 431         fi
 432
 433         # Set the key to a new value
 434         assign "${key}" "${value}"
 435
 436         if ! vpn_security_policies_write_config "${name}"; then
 437                 return ${EXIT_ERROR}
 438         fi
 439
 440         return ${EXIT_TRUE}
 441 }
 442
 443 # Reads one or more keys out of a settings file or all if no key is provided.
 444 vpn_security_policies_read_config() {
 445         assert [ $# -ge 1 ]
 446
 447         local name="${1}"
 448         shift 1
 449
 450         if ! vpn_security_policy_exists "${name}"; then
 451                 log ERROR "No such vpn security policy: ${name}"
 452                 return ${EXIT_ERROR}
 453         fi
 454
 455
 456         local args
 457         if [ $# -eq 0 ] && [ -n "${VPN_SECURITY_POLICIES_CONFIG_SETTINGS}" ]; then
 458                 list_append args ${VPN_SECURITY_POLICIES_CONFIG_SETTINGS}
 459         else
 460                 list_append args "$@"
 461         fi
 462
 463         local path="$(vpn_security_policies_path ${name})"
 464
 465         if ! settings_read "${path}" ${args}; then
 466                 log ERROR "Could not read settings for vpn security policy ${name}"
 467                 return ${EXIT_ERROR}
 468         fi
 469 }
 470
 471 # Returns the path to a the configuration fora given name
 472 vpn_security_policies_path() {
 473         assert [ $# -eq 1 ]
 474
 475         local name=${1}
 476
 477         if vpn_security_policies_check_readonly "${name}"; then
 478                 echo "${NETWORK_SHARE_DIR}/vpn/security-policies/${name}"
 479         else
 480                 echo "${NETWORK_CONFIG_DIR}/vpn/security-policies/${name}"
 481         fi
 482 }
 483
 484 # Print the content of a vpn security policy configuration file in a nice way
 485 vpn_security_policies_show() {
 486         assert [ $# -eq 1 ]
 487
 488         local name=${1}
 489
 490         local ${VPN_SECURITY_POLICIES_CONFIG_SETTINGS}
 491         if ! vpn_security_policies_read_config ${name}; then
 492                 return ${EXIT_ERROR}
 493         fi
 494
 495         cli_print_fmt1 0 "Security Policy: ${name}"
 496         cli_space
 497
 498         # This could be done in a loop but a loop is much more complicated
 499         # because we print 'Group Types' but the variable is named 'GROUP_TYPES'
 500         cli_print_fmt1 1 "Ciphers:"
 501         local cipher
 502         for cipher in ${CIPHERS}; do
 503                 cli_print_fmt1 2 "${VPN_SUPPORTED_CIPHERS[${cipher}]-${cipher}}"
 504         done
 505         cli_space
 506
 507         cli_print_fmt1 1 "Integrity:"
 508         local integrity
 509         for integrity in ${INTEGRITIES}; do
 510                 cli_print_fmt1 2 "${VPN_SUPPORTED_INTEGRITIES[${integrity}]-${integrity}}"
 511         done
 512         cli_space
 513
 514         cli_print_fmt1 1 "Pseudo Random Functions:"
 515         local prf
 516         for prf in ${PSEUDO_RANDOM_FUNCTIONS}; do
 517                 cli_print_fmt1 2 "${VPN_SUPPORTED_PSEUDO_RANDOM_FUNCTIONS[${prf}]-${prf}}"
 518         done
 519         cli_space
 520
 521         cli_print_fmt1 1 "Group Types:"
 522         local group_type
 523         for group_type in ${GROUP_TYPES}; do
 524                 cli_print_fmt1 2 "${VPN_SUPPORTED_GROUP_TYPES[${group_type}]-${group_type}}"
 525         done
 526         cli_space
 527
 528         cli_print_fmt1 1 "Key Exchange:" "${KEY_EXCHANGE}"
 529
 530         # Key Lifetime
 531         if isinteger LIFETIME && [ ${LIFETIME} -gt 0 ]; then
 532                 cli_print_fmt1 1 "Key Lifetime:" "$(format_time ${LIFETIME})"
 533         else
 534                 log ERROR "The value for Key Lifetime is not a valid integer greater zero."
 535         fi
 536
 537         # PFS
 538         if enabled PFS; then
 539                 cli_print_fmt1 1 "Perfect Forward Secrecy:" "enabled"
 540         else
 541                 cli_print_fmt1 1 "Perfect Forward Secrecy:" "disabled"
 542         fi
 543         cli_space
 544
 545         # Compression
 546         if enabled COMPRESSION; then
 547                 cli_print_fmt1 1 "Compression:" "enabled"
 548         else
 549                 cli_print_fmt1 1 "Compression:" "disabled"
 550         fi
 551         cli_space
 552 }
 553
 554 # This function checks if a vpn security policy exists
 555 # Returns True when yes and false when not
 556 vpn_security_policy_exists() {
 557         assert [ $# -eq 1 ]
 558
 559         local name=${1}
 560
 561         local path=$(vpn_security_policies_path "${name}")
 562
 563         [ -f ${path} ] && return ${EXIT_TRUE} || return ${EXIT_FALSE}
 564 }
 565
 566
 567 # This function parses the parameters for the 'cipher' command
 568 vpn_security_policies_ciphers() {
 569         local name=${1}
 570         shift
 571
 572         if [ $# -eq 0 ]; then
 573                 log ERROR "You must pass at least one value after cipher"
 574                 return ${EXIT_ERROR}
 575         fi
 576
 577         local CIPHERS
 578         if ! vpn_security_policies_read_config ${name} "CIPHERS"; then
 579                 return ${EXIT_ERROR}
 580         fi
 581
 582         # Remove duplicated entries to proceed the list safely
 583         CIPHERS="$(list_unique ${CIPHERS})"
 584
 585         local ciphers_added
 586         local ciphers_removed
 587         local ciphers_set
 588
 589         while [ $# -gt 0 ]; do
 590                 local arg="${1}"
 591
 592                 case "${arg}" in
 593                         +*)
 594                                 list_append ciphers_added "${arg:1}"
 595                                 ;;
 596                         -*)
 597                                 list_append ciphers_removed "${arg:1}"
 598                                 ;;
 599                         [A-Z0-9]*)
 600                                 list_append ciphers_set "${arg}"
 601                                 ;;
 602                         *)
 603                                 error "Invalid argument: ${arg}"
 604                                 return ${EXIT_ERROR}
 605                                 ;;
 606                 esac
 607                 shift
 608         done
 609
 610         # Check if the user is trying a mixed operation
 611         if ! list_is_empty ciphers_set && (! list_is_empty ciphers_added || ! list_is_empty ciphers_removed); then
 612                 error "You cannot reset the cipher list and add or remove ciphers at the same time"
 613                 return ${EXIT_ERROR}
 614         fi
 615
 616         # Set new cipher list
 617         if ! list_is_empty ciphers_set; then
 618                 # Check if all ciphers are valid
 619                 local cipher
 620                 for cipher in ${ciphers_set}; do
 621                         if ! vpn_security_policies_cipher_supported ${cipher}; then
 622                                 error "Unsupported cipher: ${cipher}"
 623                                 return ${EXIT_ERROR}
 624                         fi
 625                 done
 626
 627                 CIPHERS="${ciphers_set}"
 628
 629         # Perform incremental updates
 630         else
 631                 local cipher
 632
 633                 # Perform all removals
 634                 for cipher in ${ciphers_removed}; do
 635                         if ! list_remove CIPHERS ${cipher}; then
 636                                 warning "${cipher} was not on the list and could not be removed"
 637                         fi
 638                 done
 639
 640                 for cipher in ${ciphers_added}; do
 641                         if vpn_security_policies_cipher_supported ${cipher}; then
 642                                 if ! list_append_unique CIPHERS ${cipher}; then
 643                                         warning "${cipher} is already on the cipher list"
 644                                 fi
 645                         else
 646                                 warning "${cipher} is unknown or unsupported and could not be added"
 647                         fi
 648                 done
 649         fi
 650
 651         # Check if the list contain at least one valid cipher
 652         if list_is_empty CIPHERS; then
 653                 error "Cannot save an empty cipher list"
 654                 return ${EXIT_ERROR}
 655         fi
 656
 657         # Save everything
 658         if ! vpn_security_policies_write_config_key ${name} "CIPHERS" ${CIPHERS}; then
 659                 log ERROR "The changes for the vpn security policy ${name} could not be written."
 660         fi
 661
 662         cli_headline 1 "Current cipher list for ${name}:"
 663         for cipher in ${CIPHERS}; do
 664                 cli_print_fmt1 1 "${cipher}" "${VPN_SUPPORTED_CIPHERS[${cipher}]}"
 665         done
 666 }
 667
 668 # This function parses the parameters for the 'compression' command
 669 vpn_security_policies_compression(){
 670         local name=${1}
 671         local value=${2}
 672
 673         # Check if we get only one argument after compression <name>
 674         if [ ! $# -eq 2 ]; then
 675                 log ERROR "The number of arguments do not match. Only one argument after compression is allowed."
 676                 return ${EXIT_ERROR}
 677         fi
 678
 679         if ! isbool value; then
 680                 # We suggest only two values to avoid overburding the user.
 681                 log ERROR "Invalid Argument ${value}"
 682                 return ${EXIT_ERROR}
 683         fi
 684
 685         vpn_security_policies_write_config_key "${name}" "COMPRESSION" "${value}"
 686 }
 687
 688 # This function parses the parameters for the 'group-type' command
 689 vpn_security_policies_group_types() {
 690         local name=${1}
 691         shift
 692
 693         if [ $# -eq 0 ]; then
 694                 log ERROR "You must pass at least one value after group-type"
 695                 return ${EXIT_ERROR}
 696         fi
 697
 698         local GROUP_TYPES
 699         if ! vpn_security_policies_read_config ${name} "GROUP_TYPES"; then
 700                 return ${EXIT_ERROR}
 701         fi
 702
 703         # Remove duplicated entries to proceed the list safely
 704         GROUP_TYPES="$(list_unique ${GROUP_TYPES})"
 705
 706         local group_types_added
 707         local group_types_removed
 708         local group_types_set
 709
 710         while [ $# -gt 0 ]; do
 711                 local arg="${1}"
 712
 713                 case "${arg}" in
 714                         +*)
 715                                 list_append group_types_added "${arg:1}"
 716                                 ;;
 717                         -*)
 718                                 list_append group_types_removed "${arg:1}"
 719                                 ;;
 720                         [A-Z0-9]*)
 721                                 list_append group_types_set "${arg}"
 722                                 ;;
 723                         *)
 724                                 error "Invalid argument: ${arg}"
 725                                 return ${EXIT_ERROR}
 726                                 ;;
 727                 esac
 728                 shift
 729         done
 730
 731         # Check if the user is trying a mixed operation
 732         if ! list_is_empty group_types_set && (! list_is_empty group_types_added || ! list_is_empty group_types_removed); then
 733                 error "You cannot reset the group type list and add or remove group types at the same time"
 734                 return ${EXIT_ERROR}
 735         fi
 736
 737         # Set new group type list
 738         if ! list_is_empty group_types_set; then
 739                 # Check if all group types are valid
 740                 local group_type
 741                 for group_type in ${group_types_set}; do
 742                         if ! vpn_security_policies_group_type_supported ${group_type}; then
 743                                 error "Unsupported group type: ${group_type}"
 744                                 return ${EXIT_ERROR}
 745                         fi
 746                 done
 747
 748                 GROUP_TYPES="${group_types_set}"
 749
 750         # Perform incremental updates
 751         else
 752                 local group_type
 753
 754                 # Perform all removals
 755                 for group_type in ${group_types_removed}; do
 756                         if ! list_remove GROUP_TYPES ${group_type}; then
 757                                 warning "${group_type} was not on the list and could not be removed"
 758                         fi
 759                 done
 760
 761                 for group_type in ${group_types_added}; do
 762                         if vpn_security_policies_group_type_supported ${group_type}; then
 763                                 if ! list_append_unique GROUP_TYPES ${group_type}; then
 764                                         warning "${group_type} is already on the group type list"
 765                                 fi
 766                         else
 767                                 warning "${group_type} is unknown or unsupported and could not be added"
 768                         fi
 769                 done
 770         fi
 771
 772         # Check if the list contain at least one valid group_type
 773         if list_is_empty GROUP_TYPES; then
 774                 error "Cannot save an empty group type list"
 775                 return ${EXIT_ERROR}
 776         fi
 777
 778         # Save everything
 779         if ! vpn_security_policies_write_config_key ${name} "GROUP_TYPES" ${GROUP_TYPES}; then
 780                 log ERROR "The changes for the vpn security policy ${name} could not be written."
 781         fi
 782
 783         cli_headline 1 "Current group type list for ${name}:"
 784         for group_type in ${GROUP_TYPES}; do
 785                 cli_print_fmt1 1 "${group_type}" "${VPN_SUPPORTED_GROUP_TYPES[${group_type}]}"
 786         done
 787 }
 788
 789 # This function parses the parameters for the 'integrity' command
 790 vpn_security_policies_integrities() {
 791         local name=${1}
 792         shift
 793
 794         if [ $# -eq 0 ]; then
 795                 log ERROR "You must pass at least one value"
 796                 return ${EXIT_ERROR}
 797         fi
 798
 799         local INTEGRITIES
 800         if ! vpn_security_policies_read_config ${name} "INTEGRITIES"; then
 801                 return ${EXIT_ERROR}
 802         fi
 803
 804         # Remove duplicated entries to proceed the list safely
 805         INTEGRITIES="$(list_unique ${INTEGRITIES})"
 806
 807         local integritys_added
 808         local integritys_removed
 809         local integritys_set
 810
 811         while [ $# -gt 0 ]; do
 812                 local arg="${1}"
 813
 814                 case "${arg}" in
 815                         +*)
 816                                 list_append integritys_added "${arg:1}"
 817                                 ;;
 818                         -*)
 819                                 list_append integritys_removed "${arg:1}"
 820                                 ;;
 821                         [A-Z0-9]*)
 822                                 list_append integritys_set "${arg}"
 823                                 ;;
 824                         *)
 825                                 error "Invalid argument: ${arg}"
 826                                 return ${EXIT_ERROR}
 827                                 ;;
 828                 esac
 829                 shift
 830         done
 831
 832         # Check if the user is trying a mixed operation
 833         if ! list_is_empty integritys_set && (! list_is_empty integritys_added || ! list_is_empty integritys_removed); then
 834                 error "You cannot reset the integrity hashes list and add or remove integrity hashes at the same time"
 835                 return ${EXIT_ERROR}
 836         fi
 837
 838         # Set new integrity list
 839         if ! list_is_empty integritys_set; then
 840                 # Check if all integrity hashes are valid
 841                 local integrity
 842                 for integrity in ${integritys_set}; do
 843                         if ! vpn_security_policies_integrity_supported ${integrity}; then
 844                                 error "Unsupported integrity hash: ${integrity}"
 845                                 return ${EXIT_ERROR}
 846                         fi
 847                 done
 848
 849                 INTEGRITIES="${integritys_set}"
 850
 851         # Perform incremental updates
 852         else
 853                 local integrity
 854
 855                 # Perform all removals
 856                 for integrity in ${integritys_removed}; do
 857                         if ! list_remove INTEGRITIES ${integrity}; then
 858                                 warning "${integrity} was not on the list and could not be removed"
 859                         fi
 860                 done
 861
 862                 for integrity in ${integritys_added}; do
 863                         if vpn_security_policies_integrity_supported ${integrity}; then
 864                                 if ! list_append_unique INTEGRITIES ${integrity}; then
 865                                         warning "${integrity} is already on the integrity list"
 866                                 fi
 867                         else
 868                                 warning "${integrity} is unknown or unsupported and could not be added"
 869                         fi
 870                 done
 871         fi
 872
 873         # Check if the list contain at least one valid integrity
 874         if list_is_empty INTEGRITIES; then
 875                 error "Cannot save an empty integrity hashes list"
 876                 return ${EXIT_ERROR}
 877         fi
 878
 879         # Save everything
 880         if ! vpn_security_policies_write_config_key ${name} "INTEGRITIES" ${INTEGRITIES}; then
 881                 log ERROR "The changes for the vpn security policy ${name} could not be written."
 882         fi
 883
 884         cli_headline 1 "Current integrity hashes list for ${name}:"
 885         for integrity in ${INTEGRITIES}; do
 886                 cli_print_fmt1 1 "${integrity}" "${VPN_SUPPORTED_INTEGRITIES[${integrity}]}"
 887         done
 888 }
 889
 890 # This function parses the parameters for the 'pseudo-random-functions' command
 891 vpn_security_policies_pseudo_random_functions() {
 892         local name=${1}
 893         shift
 894
 895         if [ $# -eq 0 ]; then
 896                 log ERROR "You must pass at least one value"
 897                 return ${EXIT_ERROR}
 898         fi
 899
 900         local PSEUDO_RANDOM_FUNCTIONS
 901         if ! vpn_security_policies_read_config ${name} "PSEUDO_RANDOM_FUNCTIONS"; then
 902                 return ${EXIT_ERROR}
 903         fi
 904
 905         # Remove duplicated entries to proceed the list safely
 906         PSEUDO_RANDOM_FUNCTIONS="$(list_unique ${PSEUDO_RANDOM_FUNCTIONS})"
 907
 908         local prfs_added
 909         local prfs_removed
 910         local prfs_set
 911
 912         while [ $# -gt 0 ]; do
 913                 local arg="${1}"
 914
 915                 case "${arg}" in
 916                         +*)
 917                                 list_append prfs_added "${arg:1}"
 918                                 ;;
 919                         -*)
 920                                 list_append prfs_removed "${arg:1}"
 921                                 ;;
 922                         [A-Z0-9]*)
 923                                 list_append prfs_set "${arg}"
 924                                 ;;
 925                         *)
 926                                 error "Invalid argument: ${arg}"
 927                                 return ${EXIT_ERROR}
 928                                 ;;
 929                 esac
 930                 shift
 931         done
 932
 933         # Check if the user is trying a mixed operation
 934         if ! list_is_empty prfs_set && (! list_is_empty prfs_added || ! list_is_empty prfs_removed); then
 935                 error "You cannot reset the pseudo random function list and add or remove functions at the same time"
 936                 return ${EXIT_ERROR}
 937         fi
 938
 939         # Set new psudo random function list
 940         if ! list_is_empty prfs_set; then
 941                 # Check if all PRFs are valid
 942                 local prf
 943                 for prf in ${prfs_set}; do
 944                         if ! vpn_security_policies_pseudo_random_function_supported "${prf}"; then
 945                                 error "Unsupported pseudo random function: ${prf}"
 946                                 return ${EXIT_ERROR}
 947                         fi
 948                 done
 949
 950                 PSEUDO_RANDOM_FUNCTIONS="${prfs_set}"
 951
 952         # Perform incremental updates
 953         else
 954                 local prf
 955
 956                 # Perform all removals
 957                 for prf in ${prfs_removed}; do
 958                         if ! list_remove PSEUDO_RANDOM_FUNCTIONS "${prf}"; then
 959                                 warning "${prf} was not on the list and could not be removed"
 960                         fi
 961                 done
 962
 963                 for prf in ${prfs_added}; do
 964                         if vpn_security_policies_pseudo_random_function_supported "${prf}"; then
 965                                 if ! list_append_unique PSEUDO_RANDOM_FUNCTIONS "${prf}"; then
 966                                         warning "${prf} is already on the list"
 967                                 fi
 968                         else
 969                                 warning "${prf} is unknown or unsupported and could not be added"
 970                         fi
 971                 done
 972         fi
 973
 974         # Check if the list contain at least one valid value
 975         if list_is_empty PSEUDO_RANDOM_FUNCTIONS; then
 976                 error "Cannot save an empty list of pseudo random functions"
 977                 return ${EXIT_ERROR}
 978         fi
 979
 980         # Save everything
 981         if ! vpn_security_policies_write_config_key "${name}" "PSEUDO_RANDOM_FUNCTIONS" "${PSEUDO_RANDOM_FUNCTIONS}"; then
 982                 log ERROR "The changes for the VPN security policy ${name} could not be written"
 983         fi
 984
 985         cli_headline 1 "Current pseudo random function list for ${name}:"
 986         for prf in ${PSEUDO_RANDOM_FUNCTIONS}; do
 987                 cli_print_fmt1 1 "${prf}" "${VPN_SUPPORTED_PSEUDO_RANDOM_FUNCTIONS[${prf}]}"
 988         done
 989 }
 990
 991 # This function parses the parameters for the 'key-exchange' command
 992 vpn_security_policies_key_exchange() {
 993         local name=${1}
 994         local value=${2}
 995
 996         # Check if we get only one argument after key-exchange <name>
 997         if [ ! $# -eq 2 ]; then
 998                 log ERROR "The number of arguments do not match. Only argument after key-exchange is allowed."
 999                 return ${EXIT_ERROR}
1000         fi
1001
1002         if ! isoneof value "ikev1" "ikev2" "IKEV1" "IKEV2"; then
1003                 log ERROR "Invalid Argument ${value}"
1004                 return ${EXIT_ERROR}
1005         fi
1006
1007         vpn_security_policies_write_config_key "${name}" "KEY_EXCHANGE" "${value,,}"
1008 }
1009
1010 # This function parses the parameters for the 'lifetime' command.
1011 vpn_security_policies_lifetime(){
1012         local name=${1}
1013         shift
1014
1015         local value=$@
1016
1017         # Check if we get only one argument after lifetime <name>
1018         if [ ! $# -ge 1 ]; then
1019                 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"
1020                 return ${EXIT_ERROR}
1021         fi
1022
1023         if ! isinteger value; then
1024                 value=$(parse_time "$@")
1025                 if [ ! $? -eq 0 ]; then
1026                         log ERROR "Parsing the passed time was not sucessful please check the passed values."
1027                         return ${EXIT_ERROR}
1028                 fi
1029         fi
1030
1031         if [ ${value} -le 0 ]; then
1032                 log ERROR "The passed time value must be in the sum greater zero seconds."
1033                 return ${EXIT_ERROR}
1034         fi
1035
1036         vpn_security_policies_write_config_key "${name}" "LIFETIME" "${value}"
1037 }
1038
1039 # This function parses the parameters for the 'pfs' command
1040 vpn_security_policies_pfs(){
1041         local name=${1}
1042         local value=${2}
1043
1044         # Check if we get only one argument after pfs <name>
1045         if [ ! $# -eq 2 ]; then
1046                 log ERROR "The number of arguments do not match. Only argument after pfs is allowed."
1047                 return ${EXIT_ERROR}
1048         fi
1049
1050         if [ ! $# -eq 2 ] || ! isbool value; then
1051                 # We suggest only two values to avoid overburding the user.
1052                 log ERROR "Invalid Argument ${value}"
1053                 return ${EXIT_ERROR}
1054         fi
1055
1056         vpn_security_policies_write_config_key "${name}" "PFS" "${value}"
1057 }
1058
1059 # This function checks if a vpn security policy name is valid
1060 # Allowed are only A-Za-z0-9
1061 vpn_security_policies_check_name() {
1062         assert [ $# -eq 1 ]
1063
1064         local name=${1}
1065
1066         [[ ${name} =~ [^[:alnum:]$] ]]
1067 }
1068
1069 # Function that creates based on the paramters one ore more new vpn security policies
1070 vpn_security_policies_new() {
1071         if [ $# -gt 1 ]; then
1072                 error "Too many arguments"
1073                 return ${EXIT_ERROR}
1074         fi
1075
1076         local name="${1}"
1077         if ! isset name; then
1078                 error "Please provide a name"
1079                 return ${EXIT_ERROR}
1080         fi
1081
1082         # Check for duplicates
1083         if vpn_security_policy_exists "${name}"; then
1084                 error "The VPN security policy with name ${name} already exists"
1085                 return ${EXIT_ERROR}
1086         fi
1087
1088         # Check if name is valid
1089         if  vpn_security_policies_check_name "${name}"; then
1090                 error "'${name}' contains illegal characters"
1091                 return ${EXIT_ERROR}
1092         fi
1093
1094         # Check if we have a read-only policy with the same name
1095         if vpn_security_policies_check_readonly "${name}"; then
1096                 error "The VPN security policy ${name} is read-only"
1097                 return ${EXIT_ERROR}
1098         fi
1099
1100         # Check if our source policy exists
1101         if ! vpn_security_policy_exists "${VPN_DEFAULT_SECURITY_POLICY}"; then
1102                 error "Default VPN Security Policy '${VPN_DEFAULT_SECURITY_POLICY}' does not exist"
1103                 return ${EXIT_ERROR}
1104         fi
1105
1106         log DEBUG "Creating VPN Security Policy ${name}"
1107
1108         if copy "$(vpn_security_policies_path "${VPN_DEFAULT_SECURITY_POLICY}")" \
1109                         "$(vpn_security_policies_path ${name})"; then
1110                 log INFO "VPN Security Policy ${name} successfully created"
1111         else
1112                 log ERROR "Could not create VPN Security Policy ${name}"
1113                 return ${EXIT_ERROR}
1114         fi
1115
1116         # Show the newly created policy
1117         vpn_security_policies_show "${name}"
1118 }
1119
1120 # Function that deletes based on the passed parameters one ore more vpn security policies
1121 vpn_security_policies_destroy() {
1122         local name
1123         for name in "$@"; do
1124                 if ! vpn_security_policy_exists ${name}; then
1125                         log ERROR "The vpn security policy ${name} does not exist."
1126                         continue
1127                 fi
1128
1129                 if vpn_security_policies_check_readonly ${name}; then
1130                         log ERROR "The vpn security policy ${name} cannot be deleted."
1131                         continue
1132                 fi
1133
1134                 log DEBUG "Deleting vpn security policy ${name}"
1135                 settings_remove $(vpn_security_policies_path ${name})
1136
1137                 # Delete cache
1138                 rm -rf "${NETWORK_CACHE_DIR}/vpn/security-policies/${name}"
1139         done
1140 }
1141
1142 vpn_security_policies_cipher_supported() {
1143         local cipher=${1}
1144
1145         list_match ${cipher} ${!VPN_SUPPORTED_CIPHERS[@]}
1146 }
1147
1148
1149 vpn_security_policies_group_type_supported() {
1150         local group_type=${1}
1151
1152         list_match ${group_type} ${!VPN_SUPPORTED_GROUP_TYPES[@]}
1153 }
1154
1155 vpn_security_policies_integrity_supported() {
1156         local integrity=${1}
1157
1158         list_match ${integrity} ${!VPN_SUPPORTED_INTEGRITIES[@]}
1159 }
1160
1161 vpn_security_policies_pseudo_random_function_supported() {
1162         local prf="${1}"
1163
1164         list_match "${prf}" ${!VPN_SUPPORTED_PSEUDO_RANDOM_FUNCTIONS[@]}
1165 }
1166
1167 vpn_security_policies_cipher_is_aead() {
1168         local cipher=${1}
1169
1170         # All CCM and GCM ciphers are AEAD
1171         if string_match "[CG]CM" "${cipher}"; then
1172                 return ${EXIT_TRUE}
1173         fi
1174
1175         # Poly1305 is AEAD
1176         if string_match "POLY1305" "${cipher}"; then
1177                 return ${EXIT_TRUE}
1178         fi
1179
1180         return ${EXIT_FALSE}
1181 }
1182
1183 vpn_security_policies_make_ike_proposal() {
1184         local name=${1}
1185
1186         if ! vpn_security_policy_exists ${name}; then
1187                 return ${EXIT_ERROR}
1188         fi
1189
1190         local config_path="$(vpn_security_policies_path ${name})"
1191         local cache_path="${NETWORK_CACHE_DIR}/vpn/security-policies/${name}/ike-proposal"
1192
1193         # Get data from cache if possible
1194         if file_exists "${cache_path}" && ! file_is_newer_than "${config_path}" "${cache_path}"; then
1195                 fread "${cache_path}"
1196                 return ${EXIT_OK}
1197         fi
1198
1199         # No or invalid cache data found
1200         local proposal=$(_vpn_security_policies_make_ike_proposal "${name}")
1201
1202         # Write proposal to cache
1203         if ! make_parent_directory "${cache_path}" || ! fwrite "${cache_path}" "${proposal}"; then
1204                 log WARNING "Could not write to cache: ${cache_path}"
1205         fi
1206
1207         print "${proposal}"
1208 }
1209
1210 _vpn_security_policies_make_ike_proposal() {
1211         local name=${1}
1212
1213         # Read the config settings
1214         local ${VPN_SECURITY_POLICIES_CONFIG_SETTINGS}
1215         if ! vpn_security_policies_read_config "${name}"; then
1216                 return ${EXIT_ERROR}
1217         fi
1218
1219         local proposals
1220
1221         local cipher
1222         for cipher in ${CIPHERS}; do
1223                 # Translate cipher
1224                 local _cipher=${CIPHER_TO_STRONGSWAN[${cipher}]}
1225
1226                 if ! isset _cipher; then
1227                         log WARN "Unsupported cipher: ${cipher}"
1228                         continue
1229                 fi
1230
1231                 if vpn_security_policies_cipher_is_aead "${cipher}"; then
1232                         local prf
1233                         for prf in ${PSEUDO_RANDOM_FUNCTIONS}; do
1234                                 local _prf="${PSEUDO_RANDOM_FUNCTION_TO_STRONGSWAN[${prf}]}"
1235
1236                                 if ! isset _prf; then
1237                                         log WARN "Unsupported pseudo random function: ${prf}"
1238                                         continue
1239                                 fi
1240
1241                                 local group_type
1242                                 for group_type in ${GROUP_TYPES}; do
1243                                         local _group_type=${GROUP_TYPE_TO_STRONGSWAN[${group_type}]}
1244
1245                                         if ! isset _group_type; then
1246                                                 log WARN "Unsupported group-type: ${group_type}"
1247                                                 continue
1248                                         fi
1249
1250                                         # Put everything together
1251                                         list_append proposals "${_cipher}-${_prf}-${_group_type}"
1252                                 done
1253                         done
1254                 else
1255                         local integrity
1256                         for integrity in ${INTEGRITIES}; do
1257                                 local _integrity=${INTEGRITY_TO_STRONGSWAN[${integrity}]}
1258
1259                                 if ! isset _integrity; then
1260                                         log WARN "Unsupported integrity: ${integrity}"
1261                                         continue
1262                                 fi
1263
1264                                 local group_type
1265                                 for group_type in ${GROUP_TYPES}; do
1266                                         local _group_type=${GROUP_TYPE_TO_STRONGSWAN[${group_type}]}
1267
1268                                         if ! isset _group_type; then
1269                                                 log WARN "Unsupported group-type: ${group_type}"
1270                                                 continue
1271                                         fi
1272
1273                                         # Put everything together
1274                                         list_append proposals "${_cipher}-${_integrity}-${_group_type}"
1275                                 done
1276                         done
1277                 fi
1278         done
1279
1280         # Returns as a comma-separated list
1281         list_join proposals ,
1282 }
1283
1284 vpn_security_policies_make_esp_proposal() {
1285         local name=${1}
1286
1287         if ! vpn_security_policy_exists ${name}; then
1288                 return ${EXIT_ERROR}
1289         fi
1290
1291         local config_path="$(vpn_security_policies_path ${name})"
1292         local cache_path="${NETWORK_CACHE_DIR}/vpn/security-policies/${name}/esp-proposal"
1293
1294         # Get data from cache if possible
1295         if file_exists "${cache_path}" && ! file_is_newer_than "${config_path}" "${cache_path}"; then
1296                 fread "${cache_path}"
1297                 return ${EXIT_OK}
1298         fi
1299
1300         # No or invalid cache data found
1301         local proposal=$(_vpn_security_policies_make_esp_proposal "${name}")
1302
1303         # Write proposal to cache
1304         if ! make_parent_directory "${cache_path}" || ! fwrite "${cache_path}" "${proposal}"; then
1305                 log WARNING "Could not write to cache: ${cache_path}"
1306         fi
1307
1308         print "${proposal}"
1309 }
1310
1311 _vpn_security_policies_make_esp_proposal() {
1312         local name=${1}
1313
1314         # Read the config settings
1315         local ${VPN_SECURITY_POLICIES_CONFIG_SETTINGS}
1316         if ! vpn_security_policies_read_config "${name}"; then
1317                 return ${EXIT_ERROR}
1318         fi
1319
1320         local proposals
1321
1322         local cipher
1323         for cipher in ${CIPHERS}; do
1324                 # Translate cipher
1325                 local _cipher=${CIPHER_TO_STRONGSWAN[${cipher}]}
1326
1327                 if ! isset _cipher; then
1328                         log WARN "Unsupported cipher: ${cipher}"
1329                         continue
1330                 fi
1331
1332                 if vpn_security_policies_cipher_is_aead ${cipher}; then
1333                         local group_type
1334                         for group_type in ${GROUP_TYPES}; do
1335                                 local _group_type=${GROUP_TYPE_TO_STRONGSWAN[${group_type}]}
1336
1337                                 if ! isset _group_type; then
1338                                         log WARN "Unsupported group-type: ${group_type}"
1339                                         continue
1340                                 fi
1341
1342                                 # Put everything together
1343                                 list_append proposals "${_cipher}-${_group_type}"
1344                         done
1345                 else
1346                         local integrity
1347                         for integrity in ${INTEGRITIES}; do
1348                                 local _integrity=${INTEGRITY_TO_STRONGSWAN[${integrity}]}
1349
1350                                 if ! isset _integrity; then
1351                                         log WARN "Unsupported integrity: ${integrity}"
1352                                         continue
1353                                 fi
1354
1355                                 local group_type
1356                                 for group_type in ${GROUP_TYPES}; do
1357                                         local _group_type=${GROUP_TYPE_TO_STRONGSWAN[${group_type}]}
1358
1359                                         if ! isset _group_type; then
1360                                                 log WARN "Unsupported group-type: ${group_type}"
1361                                                 continue
1362                                         fi
1363
1364                                         # Put everything together
1365                                         list_append proposals "${_cipher}-${_integrity}-${_group_type}"
1366                                 done
1367                         done
1368                 fi
1369         done
1370
1371         # Returns as a comma-separated list
1372         list_join proposals ,
1373 }
1374
1375 # List all security policies
1376 vpn_security_policies_list_all() {
1377         list_directory "${NETWORK_SHARE_DIR}/vpn/security-policies"
1378
1379         # Add all user-defined policies
1380         vpn_security_policies_list_user
1381 }
1382
1383 vpn_security_policies_list_user() {
1384         list_directory "${NETWORK_CONFIG_DIR}/vpn/security-policies"
1385 }