mirror of
https://github.com/pgpainless/pgpainless.git
synced 2024-11-19 02:42:05 +01:00
Kotlin conversion: Trustworthiness
This commit is contained in:
parent
3a62b39197
commit
382817dc5f
GPG key ID:
62BEE9264BF17311
2 changed files with 140 additions and 188 deletions
|
|
@ -1,188 +0,0 @@
|
|||
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
|
||||
//
|
||||
// SPDX-License-Identifier: Apache-2.0
|
||||
|
||||
package org.pgpainless.algorithm;
|
||||
|
||||
/**
|
||||
* Facade class for {@link org.bouncycastle.bcpg.sig.TrustSignature}.
|
||||
* A trust signature subpacket marks the trustworthiness of a certificate and defines its capabilities to act
|
||||
* as a trusted introducer.
|
||||
*/
|
||||
public class Trustworthiness {
|
||||
|
||||
private final int amount;
|
||||
private final int depth;
|
||||
|
||||
public static final int THRESHOLD_FULLY_CONVINCED = 120; // greater or equal is fully trusted
|
||||
public static final int MARGINALLY_CONVINCED = 60; // default value for marginally convinced
|
||||
public static final int NOT_TRUSTED = 0; // 0 is not trusted
|
||||
|
||||
public Trustworthiness(int amount, int depth) {
|
||||
this.amount = capAmount(amount);
|
||||
this.depth = capDepth(depth);
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the trust amount.
|
||||
* This value means how confident the issuer of the signature is in validity of the binding.
|
||||
*
|
||||
* @return trust amount
|
||||
*/
|
||||
public int getAmount() {
|
||||
return amount;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the depth of the trust signature.
|
||||
* This value controls, whether the certificate can act as a trusted introducer.
|
||||
*
|
||||
* @return depth
|
||||
*/
|
||||
public int getDepth() {
|
||||
return depth;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns true, if the trust amount is equal to 0.
|
||||
* This means the key is not trusted.
|
||||
*
|
||||
* Otherwise return false
|
||||
* @return true if untrusted
|
||||
*/
|
||||
public boolean isNotTrusted() {
|
||||
return getAmount() == NOT_TRUSTED;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return true if the certificate is at least marginally trusted.
|
||||
* That is the case, if the trust amount is greater than 0.
|
||||
*
|
||||
* @return true if the cert is at least marginally trusted
|
||||
*/
|
||||
public boolean isMarginallyTrusted() {
|
||||
return getAmount() > NOT_TRUSTED;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return true if the certificate is fully trusted. That is the case if the trust amount is
|
||||
* greater than or equal to 120.
|
||||
*
|
||||
* @return true if the cert is fully trusted
|
||||
*/
|
||||
public boolean isFullyTrusted() {
|
||||
return getAmount() >= THRESHOLD_FULLY_CONVINCED;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return true, if the cert is an introducer. That is the case if the depth is greater 0.
|
||||
*
|
||||
* @return true if introducer
|
||||
*/
|
||||
public boolean isIntroducer() {
|
||||
return getDepth() >= 1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return true, if the certified cert can introduce certificates with trust depth of <pre>otherDepth</pre>.
|
||||
*
|
||||
* @param otherDepth other certifications trust depth
|
||||
* @return true if the cert can introduce the other
|
||||
*/
|
||||
public boolean canIntroduce(int otherDepth) {
|
||||
return getDepth() > otherDepth;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return true, if the certified cert can introduce certificates with the given <pre>other</pre> trust depth.
|
||||
*
|
||||
* @param other other certificates trust depth
|
||||
* @return true if the cert can introduce the other
|
||||
*/
|
||||
public boolean canIntroduce(Trustworthiness other) {
|
||||
return canIntroduce(other.getDepth());
|
||||
}
|
||||
|
||||
/**
|
||||
* This means that we are fully convinced of the trustworthiness of the key.
|
||||
*
|
||||
* @return builder
|
||||
*/
|
||||
public static Builder fullyTrusted() {
|
||||
return new Builder(THRESHOLD_FULLY_CONVINCED);
|
||||
}
|
||||
|
||||
/**
|
||||
* This means that we are marginally (partially) convinced of the trustworthiness of the key.
|
||||
*
|
||||
* @return builder
|
||||
*/
|
||||
public static Builder marginallyTrusted() {
|
||||
return new Builder(MARGINALLY_CONVINCED);
|
||||
}
|
||||
|
||||
/**
|
||||
* This means that we do not trust the key.
|
||||
* Can be used to overwrite previous trust.
|
||||
*
|
||||
* @return builder
|
||||
*/
|
||||
public static Builder untrusted() {
|
||||
return new Builder(NOT_TRUSTED);
|
||||
}
|
||||
|
||||
public static final class Builder {
|
||||
|
||||
private final int amount;
|
||||
|
||||
private Builder(int amount) {
|
||||
this.amount = amount;
|
||||
}
|
||||
|
||||
/**
|
||||
* The key is a trusted introducer (depth 1).
|
||||
* Certifications made by this key are considered trustworthy.
|
||||
*
|
||||
* @return trust
|
||||
*/
|
||||
public Trustworthiness introducer() {
|
||||
return new Trustworthiness(amount, 1);
|
||||
}
|
||||
|
||||
/**
|
||||
* The key is a meta introducer (depth 2).
|
||||
* This key can introduce trusted introducers of depth 1.
|
||||
*
|
||||
* @return trust
|
||||
*/
|
||||
public Trustworthiness metaIntroducer() {
|
||||
return new Trustworthiness(amount, 2);
|
||||
}
|
||||
|
||||
/**
|
||||
* The key is a meta introducer of depth <pre>n</pre>.
|
||||
* This key can introduce meta introducers of depth <pre>n - 1</pre>.
|
||||
*
|
||||
* @param n depth
|
||||
* @return trust
|
||||
*/
|
||||
public Trustworthiness metaIntroducerOfDepth(int n) {
|
||||
return new Trustworthiness(amount, n);
|
||||
}
|
||||
}
|
||||
|
||||
private static int capAmount(int amount) {
|
||||
if (amount < 0 || amount > 255) {
|
||||
throw new IllegalArgumentException("Trust amount MUST be a value between 0 and 255");
|
||||
}
|
||||
return amount;
|
||||
}
|
||||
|
||||
private static int capDepth(int depth) {
|
||||
if (depth < 0 || depth > 255) {
|
||||
throw new IllegalArgumentException("Trust depth MUST be a value between 0 and 255");
|
||||
}
|
||||
return depth;
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -0,0 +1,140 @@
|
|||
// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
|
||||
//
|
||||
// SPDX-License-Identifier: Apache-2.0
|
||||
|
||||
package org.pgpainless.algorithm
|
||||
|
||||
/**
|
||||
* Facade class for [org.bouncycastle.bcpg.sig.TrustSignature].
|
||||
* A trust signature subpacket marks the trustworthiness of a certificate and defines its capabilities to act
|
||||
* as a trusted introducer.
|
||||
*/
|
||||
class Trustworthiness(amount: Int, depth: Int) {
|
||||
val depth = capDepth(depth)
|
||||
val amount = capAmount(amount)
|
||||
|
||||
/**
|
||||
* Returns true, if the trust amount is equal to 0.
|
||||
* This means the key is not trusted.
|
||||
*
|
||||
* Otherwise return false
|
||||
* @return true if untrusted
|
||||
*/
|
||||
fun isNotTrusted() = amount == NOT_TRUSTED
|
||||
|
||||
/**
|
||||
* Return true if the certificate is at least marginally trusted.
|
||||
* That is the case, if the trust amount is greater than 0.
|
||||
*
|
||||
* @return true if the cert is at least marginally trusted
|
||||
*/
|
||||
fun isMarginallyTrusted() = amount > NOT_TRUSTED
|
||||
|
||||
/**
|
||||
* Return true if the certificate is fully trusted. That is the case if the trust amount is
|
||||
* greater than or equal to 120.
|
||||
*
|
||||
* @return true if the cert is fully trusted
|
||||
*/
|
||||
fun isFullyTrusted() = amount >= THRESHOLD_FULLY_CONVINCED
|
||||
|
||||
/**
|
||||
* Return true, if the cert is an introducer. That is the case if the depth is greater 0.
|
||||
*
|
||||
* @return true if introducer
|
||||
*/
|
||||
fun isIntroducer() = depth >= 1
|
||||
|
||||
/**
|
||||
* Return true, if the certified cert can introduce certificates with trust depth of <pre>otherDepth</pre>.
|
||||
*
|
||||
* @param otherDepth other certifications trust depth
|
||||
* @return true if the cert can introduce the other
|
||||
*/
|
||||
fun canIntroduce(otherDepth: Int) = depth > otherDepth
|
||||
|
||||
/**
|
||||
* Return true, if the certified cert can introduce certificates with the given <pre>other</pre> trust depth.
|
||||
*
|
||||
* @param other other certificates trust depth
|
||||
* @return true if the cert can introduce the other
|
||||
*/
|
||||
fun canIntroduce(other: Trustworthiness) = canIntroduce(other.depth)
|
||||
|
||||
companion object {
|
||||
|
||||
const val THRESHOLD_FULLY_CONVINCED = 120 // greater or equal is fully trusted
|
||||
const val MARGINALLY_CONVINCED = 60 // default value for marginally convinced
|
||||
const val NOT_TRUSTED = 0 // 0 is not trusted
|
||||
|
||||
/**
|
||||
* This means that we are fully convinced of the trustworthiness of the key.
|
||||
*
|
||||
* @return builder
|
||||
*/
|
||||
@JvmStatic
|
||||
fun fullyTrusted() = Builder(THRESHOLD_FULLY_CONVINCED)
|
||||
|
||||
/**
|
||||
* This means that we are marginally (partially) convinced of the trustworthiness of the key.
|
||||
*
|
||||
* @return builder
|
||||
*/
|
||||
@JvmStatic
|
||||
fun marginallyTrusted() = Builder(MARGINALLY_CONVINCED)
|
||||
|
||||
/**
|
||||
* This means that we do not trust the key.
|
||||
* Can be used to overwrite previous trust.
|
||||
*
|
||||
* @return builder
|
||||
*/
|
||||
@JvmStatic
|
||||
fun untrusted() = Builder(NOT_TRUSTED)
|
||||
|
||||
@JvmStatic
|
||||
private fun capAmount(amount: Int): Int {
|
||||
if (amount !in 0..255) {
|
||||
throw IllegalArgumentException("Trust amount MUST be a value between 0 and 255")
|
||||
}
|
||||
return amount
|
||||
}
|
||||
|
||||
@JvmStatic
|
||||
private fun capDepth(depth: Int): Int {
|
||||
if (depth !in 0..255) {
|
||||
throw IllegalArgumentException("Trust depth MUST be a value between 0 and 255")
|
||||
}
|
||||
return depth
|
||||
}
|
||||
}
|
||||
|
||||
class Builder(val amount: Int) {
|
||||
|
||||
/**
|
||||
* The key is a trusted introducer (depth 1).
|
||||
* Certifications made by this key are considered trustworthy.
|
||||
*
|
||||
* @return trust
|
||||
*/
|
||||
fun introducer() = Trustworthiness(amount, 1)
|
||||
|
||||
/**
|
||||
* The key is a meta introducer (depth 2).
|
||||
* This key can introduce trusted introducers of depth 1.
|
||||
*
|
||||
* @return trust
|
||||
*/
|
||||
fun metaIntroducer() = Trustworthiness(amount, 2)
|
||||
|
||||
/**
|
||||
* The key is a meta introducer of depth <pre>n</pre>.
|
||||
* This key can introduce meta introducers of depth <pre>n - 1</pre>.
|
||||
*
|
||||
* @param n depth
|
||||
* @return trust
|
||||
*/
|
||||
fun metaIntroducerOfDepth(d: Int) = Trustworthiness(amount, d)
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in a new issue