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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2020 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package builtin
// https://www.kernel.org/doc/html/latest/crypto/userspace-if.html
// https://www.kernel.org/doc/html/latest/crypto/intro.html
const kernelCryptoAPISummary = `allows access to the Linux kernel crypto API`
// The kernel crypto API is designed to be used by any process (ie, using it
// requires no special privileges). Since it provides a kernel surface and
// has a CVE history, manually connect for now.
const kernelCryptoAPIBaseDeclarationSlots = `
kernel-crypto-api:
allow-installation:
slot-snap-type:
- core
deny-auto-connection: true
`
const kernelCryptoAPIConnectedPlugAppArmor = `
# Description: Can access the Linux kernel crypto API
@{PROC}/crypto r,
# socket(AF_ALG, SOCK_SEQPACKET, ...)
network alg seqpacket,
# socket(AF_NETLINK, SOCK_{DGRAM,RAW}, NETLINK_CRYPTO)
network netlink dgram,
network netlink raw,
`
const kernelCryptoAPIConnectedPlugSeccomp = `
# Description: Can access the Linux kernel crypto API
socket AF_NETLINK - NETLINK_CRYPTO
bind
accept
`
func init() {
registerIface(&commonInterface{
name: "kernel-crypto-api",
summary: kernelCryptoAPISummary,
implicitOnCore: true,
implicitOnClassic: true,
connectedPlugAppArmor: kernelCryptoAPIConnectedPlugAppArmor,
connectedPlugSecComp: kernelCryptoAPIConnectedPlugSeccomp,
baseDeclarationSlots: kernelCryptoAPIBaseDeclarationSlots,
})
}
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