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Code Issues Releases Wiki Activity

Add documentation to AlgorithmNegotiator classes

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This commit is contained in:
Paul Schaub 2022-08-29 11:06:17 +02:00
parent 6f161c8336
commit 405e67c0cb
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
2 changed files with 52 additions and 2 deletions
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33
pgpainless-core/src/main/java/org/pgpainless/algorithm/negotiation/HashAlgorithmNegotiator.java
View file

@ -9,18 +9,51 @@ import java.util.Set;
import org.pgpainless.algorithm.HashAlgorithm;
import org.pgpainless.policy.Policy;
/**
* Interface for a class that negotiates {@link HashAlgorithm HashAlgorithms}.
*
* You can provide your own implementation using custom logic by implementing the
* {@link #negotiateHashAlgorithm(Set)} method.
*/
public interface HashAlgorithmNegotiator {
/**
* Pick one {@link HashAlgorithm} from the ordered set of acceptable algorithms.
*
* @param orderedHashAlgorithmPreferencesSet hash algorithm preferences
* @return picked algorithms
*/
HashAlgorithm negotiateHashAlgorithm(Set<HashAlgorithm> orderedHashAlgorithmPreferencesSet);
/**
* Return an instance that negotiates {@link HashAlgorithm HashAlgorithms} used for non-revocation signatures
* based on the given {@link Policy}.
*
* @param policy algorithm policy
* @return negotiator
*/
static HashAlgorithmNegotiator negotiateSignatureHashAlgorithm(Policy policy) {
return negotiateByPolicy(policy.getSignatureHashAlgorithmPolicy());
}
/**
* Return an instance that negotiates {@link HashAlgorithm HashAlgorithms} used for revocation signatures
* based on the given {@link Policy}.
*
* @param policy algorithm policy
* @return negotiator
*/
static HashAlgorithmNegotiator negotiateRevocationSignatureAlgorithm(Policy policy) {
return negotiateByPolicy(policy.getRevocationSignatureHashAlgorithmPolicy());
}
/**
* Return an instance that negotiates {@link HashAlgorithm HashAlgorithms} based on the given
* {@link Policy.HashAlgorithmPolicy}.
*
* @param hashAlgorithmPolicy algorithm policy for hash algorithms
* @return negotiator
*/
static HashAlgorithmNegotiator negotiateByPolicy(Policy.HashAlgorithmPolicy hashAlgorithmPolicy) {
return new HashAlgorithmNegotiator() {
@Override

21
pgpainless-core/src/main/java/org/pgpainless/algorithm/negotiation/SymmetricKeyAlgorithmNegotiator.java
View file

@ -22,18 +22,35 @@ public interface SymmetricKeyAlgorithmNegotiator {
/**
* Negotiate a symmetric encryption algorithm.
* If the override is non-null, it will be returned instead of performing an actual negotiation.
* Otherwise, the list of ordered sets containing the preferences of different recipient keys will be
* used to determine a suitable symmetric encryption algorithm.
*
* @param policy algorithm policy
* @param override algorithm override (if not null, return this)
* @param keyPreferences list of preferences per key
* @return negotiated algorithm
*/
SymmetricKeyAlgorithm negotiate(Policy.SymmetricKeyAlgorithmPolicy policy, SymmetricKeyAlgorithm override, List<Set<SymmetricKeyAlgorithm>> keyPreferences);
SymmetricKeyAlgorithm negotiate(
Policy.SymmetricKeyAlgorithmPolicy policy,
SymmetricKeyAlgorithm override,
List<Set<SymmetricKeyAlgorithm>> keyPreferences);
/**
* Return an instance that negotiates a {@link SymmetricKeyAlgorithm} by selecting the most popular acceptable
* algorithm from the list of preferences.
*
* This negotiator has the best chances to select an algorithm which is understood by all recipients.
*
* @return negotiator that selects by popularity
*/
static SymmetricKeyAlgorithmNegotiator byPopularity() {
return new SymmetricKeyAlgorithmNegotiator() {
@Override
public SymmetricKeyAlgorithm negotiate(Policy.SymmetricKeyAlgorithmPolicy policy, SymmetricKeyAlgorithm override, List<Set<SymmetricKeyAlgorithm>> preferences) {
public SymmetricKeyAlgorithm negotiate(
Policy.SymmetricKeyAlgorithmPolicy policy,
SymmetricKeyAlgorithm override,
List<Set<SymmetricKeyAlgorithm>> preferences) {
if (override == SymmetricKeyAlgorithm.NULL) {
throw new IllegalArgumentException("Algorithm override cannot be NULL (plaintext).");
}