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Code Issues Releases Wiki Activity

Add documentation to SignatureSubpacketsUtil

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This commit is contained in:
Paul Schaub 2021-08-14 11:19:40 +02:00
parent 3c68840a29
commit 468159b2ad
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
1 changed files with 47 additions and 0 deletions
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47
pgpainless-core/src/main/java/org/pgpainless/signature/subpackets/SignatureSubpacketsUtil.java
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@ -108,6 +108,13 @@ public class SignatureSubpacketsUtil {
return hashedOrUnhashed(signature, SignatureSubpacket.issuerKeyId);
}
/**
* Inspect the given signature's {@link IssuerKeyID} packet to determine the issuer key-id.
* If no such packet is present, return null.
*
* @param signature signature
* @return issuer key-id as {@link Long}
*/
public static Long getIssuerKeyIdAsLong(PGPSignature signature) {
IssuerKeyID keyID = getIssuerKeyId(signature);
if (keyID == null) {
@ -220,6 +227,14 @@ public class SignatureSubpacketsUtil {
return hashed(signature, SignatureSubpacket.preferredSymmetricAlgorithms);
}
/**
* Return the preferred {@link SymmetricKeyAlgorithm SymmetricKeyAlgorithms} as present in the signature.
* If no preference is given with regard to symmetric encryption algorithms, return an empty set.
*
* In any case, the resulting set is ordered by occurrence ({@link LinkedHashSet}).
* @param signature signature
* @return ordered set of symmetric key algorithm preferences
*/
public static Set<SymmetricKeyAlgorithm> parsePreferredSymmetricKeyAlgorithms(PGPSignature signature) {
Set<SymmetricKeyAlgorithm> algorithms = new LinkedHashSet<>();
PreferredAlgorithms preferences = getPreferredSymmetricAlgorithms(signature);
@ -241,6 +256,14 @@ public class SignatureSubpacketsUtil {
return hashed(signature, SignatureSubpacket.preferredHashAlgorithms);
}
/**
* Return the preferred {@link HashAlgorithm HashAlgorithms} as present in the signature.
* If no preference is given with regard to hash algorithms, return an empty set.
*
* In any case, the resulting set is ordered by occurrence ({@link LinkedHashSet}).
* @param signature signature
* @return ordered set of hash algorithm preferences
*/
public static Set<HashAlgorithm> parsePreferredHashAlgorithms(PGPSignature signature) {
Set<HashAlgorithm> algorithms = new LinkedHashSet<>();
PreferredAlgorithms preferences = getPreferredHashAlgorithms(signature);
@ -262,6 +285,14 @@ public class SignatureSubpacketsUtil {
return hashed(signature, SignatureSubpacket.preferredCompressionAlgorithms);
}
/**
* Return the preferred {@link CompressionAlgorithm CompressionAlgorithms} as present in the signature.
* If no preference is given with regard to compression algorithms, return an empty set.
*
* In any case, the resulting set is ordered by occurrence ({@link LinkedHashSet}).
* @param signature signature
* @return ordered set of compression algorithm preferences
*/
public static Set<CompressionAlgorithm> parsePreferredCompressionAlgorithms(PGPSignature signature) {
Set<CompressionAlgorithm> algorithms = new LinkedHashSet<>();
PreferredAlgorithms preferences = getPreferredCompressionAlgorithms(signature);
@ -343,6 +374,14 @@ public class SignatureSubpacketsUtil {
return Arrays.asList(notations);
}
/**
* Return a list of all {@link NotationData} objects from the hashed area of the signature that have a
* notation name equal to the given notationName argument.
*
* @param signature signature
* @param notationName notation name
* @return list of matching notation data objects
*/
public static List<NotationData> getHashedNotationData(PGPSignature signature, String notationName) {
List<NotationData> allNotations = getHashedNotationData(signature);
List<NotationData> withName = new ArrayList<>();
@ -365,6 +404,14 @@ public class SignatureSubpacketsUtil {
return Arrays.asList(notations);
}
/**
* Return a list of all {@link NotationData} objects from the unhashed area of the signature that have a
* notation name equal to the given notationName argument.
*
* @param signature signature
* @param notationName notation name
* @return list of matching notation data objects
*/
public static List<NotationData> getUnhashedNotationData(PGPSignature signature, String notationName) {
List<NotationData> allNotations = getUnhashedNotationData(signature);
List<NotationData> withName = new ArrayList<>();