com.virgilsecurity.keyknox.storage.KeychainUtils.kt Maven / Gradle / Ivy

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Virgil Security provides an SDK which allows you to communicate with Virgil Keyknox Service. Virgil Keyknox Service allows users to store their sensitive data (such as Private Key) encrypted (with end-to-end encryption) for using and sharing it between different devices.

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/*
 * Copyright (c) 2015-2019, Virgil Security, Inc.
 *
 * Lead Maintainer: Virgil Security Inc. 
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     (1) Redistributions of source code must retain the above copyright notice, this
 *     list of conditions and the following disclaimer.
 *
 *     (2) Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *
 *     (3) Neither the name of virgil nor the names of its
 *     contributors may be used to endorse or promote products derived from
 *     this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.virgilsecurity.keyknox.storage

import com.virgilsecurity.keyknox.exception.InvalidCreationDateInKeychainEntryException
import com.virgilsecurity.keyknox.exception.InvalidModificationDateInKeychainEntryException
import com.virgilsecurity.keyknox.exception.NoMetaInKeychainEntryException
import com.virgilsecurity.keyknox.model.CloudEntry
import com.virgilsecurity.sdk.storage.KeyEntry
import java.util.*

class KeychainUtils {

    fun createMetaForKeychain(cloudEntry: CloudEntry): Map {
        val meta = mutableMapOf()

        meta[KEYKNOX_META_CREATION_DATE_KEY] = cloudEntry.creationDate.time.toString()
        meta[KEYKNOX_META_MODIFICATION_DATE_KEY] = cloudEntry.modificationDate.time.toString()
        meta.putAll(cloudEntry.meta)

        return meta
    }

    fun filterKeyknoxKeychainEntry(keyEntry: KeyEntry): Boolean {
        try {
            extractModificationDate(keyEntry)
            return true
        } catch (e: Exception) {
            return false
        }
    }

    fun extractModificationDate(keyEntry: KeyEntry): Pair {
        val meta = keyEntry.meta ?: throw NoMetaInKeychainEntryException()

        val modificationTimestampStr = meta[KeychainUtils.KEYKNOX_META_MODIFICATION_DATE_KEY]
                ?: throw InvalidModificationDateInKeychainEntryException()
        val modificationTimestamp = try {
            modificationTimestampStr.toLong()
        } catch (e: NumberFormatException) {
            throw InvalidModificationDateInKeychainEntryException()
        }

        val creationTimestampStr = meta[KeychainUtils.KEYKNOX_META_CREATION_DATE_KEY]
                ?: throw InvalidCreationDateInKeychainEntryException()
        val creationTimestamp = try {
            creationTimestampStr.toLong()
        } catch (e: NumberFormatException) {
            throw InvalidCreationDateInKeychainEntryException()
        }

        return Pair(Date(creationTimestamp), Date(modificationTimestamp))
    }


    companion object {
        val KEYKNOX_META_CREATION_DATE_KEY = "k_cda"
        val KEYKNOX_META_MODIFICATION_DATE_KEY = "k_mda"
    }
}