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https://github.com/pgpainless/pgpainless.git
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Remove unused SignatureValidator methods
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parent
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GPG key ID:
62BEE9264BF17311
1 changed files with 0 additions and 472 deletions
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@ -7,23 +7,12 @@ package org.pgpainless.signature.consumer
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import java.util.Date
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import java.util.Date
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import openpgp.formatUTC
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import openpgp.formatUTC
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import openpgp.openPgpKeyId
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import openpgp.openPgpKeyId
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import org.bouncycastle.openpgp.PGPException
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import org.bouncycastle.openpgp.PGPPublicKey
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import org.bouncycastle.openpgp.PGPPublicKey
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import org.bouncycastle.openpgp.PGPSignature
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import org.bouncycastle.openpgp.PGPSignature
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import org.bouncycastle.openpgp.PGPUserAttributeSubpacketVector
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import org.bouncycastle.openpgp.api.OpenPGPImplementation
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import org.pgpainless.algorithm.SignatureSubpacket
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import org.pgpainless.algorithm.SignatureType
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import org.pgpainless.bouncycastle.extensions.fingerprint
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import org.pgpainless.bouncycastle.extensions.fingerprint
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import org.pgpainless.bouncycastle.extensions.isOfType
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import org.pgpainless.bouncycastle.extensions.publicKeyAlgorithm
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import org.pgpainless.bouncycastle.extensions.signatureExpirationDate
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import org.pgpainless.bouncycastle.extensions.signatureHashAlgorithm
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import org.pgpainless.exception.SignatureValidationException
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import org.pgpainless.exception.SignatureValidationException
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import org.pgpainless.key.OpenPgpFingerprint
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import org.pgpainless.key.OpenPgpFingerprint
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import org.pgpainless.policy.Policy
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import org.pgpainless.signature.subpackets.SignatureSubpacketsUtil
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import org.pgpainless.signature.subpackets.SignatureSubpacketsUtil
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import org.pgpainless.util.NotationRegistry
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abstract class SignatureValidator {
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abstract class SignatureValidator {
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@ -72,467 +61,6 @@ abstract class SignatureValidator {
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}
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}
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}
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}
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/**
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* Verify that a signature has an acceptable structure.
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*
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* @param signingKey signing key
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* @param policy policy
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* @return validator
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*/
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@JvmStatic
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fun signatureStructureIsAcceptable(
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signingKey: PGPPublicKey,
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policy: Policy
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): SignatureValidator {
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return object : SignatureValidator() {
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override fun verify(signature: PGPSignature) {
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signatureIsNotMalformed(signingKey).verify(signature)
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if (signature.version >= 4) {
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signatureDoesNotHaveCriticalUnknownNotations(policy.notationRegistry)
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.verify(signature)
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signatureDoesNotHaveCriticalUnknownSubpackets().verify(signature)
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}
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signatureUsesAcceptableHashAlgorithm(policy).verify(signature)
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signatureUsesAcceptablePublicKeyAlgorithm(policy, signingKey).verify(signature)
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}
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}
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}
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/**
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* Verify that a signature was made using an acceptable [PublicKeyAlgorithm].
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*
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* @param policy policy
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* @param signingKey signing key
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* @return validator
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*/
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@JvmStatic
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fun signatureUsesAcceptablePublicKeyAlgorithm(
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policy: Policy,
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signingKey: PGPPublicKey
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): SignatureValidator {
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return object : SignatureValidator() {
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override fun verify(signature: PGPSignature) {
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if (signingKey.bitStrength == -1) {
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throw SignatureValidationException(
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"Cannot determine bit strength of signing key.")
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}
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if (!policy.publicKeyAlgorithmPolicy.isAcceptable(
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signingKey.publicKeyAlgorithm, signingKey.bitStrength)) {
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throw SignatureValidationException(
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"Signature was made using unacceptable key. " +
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"${signingKey.publicKeyAlgorithm} (${signingKey.bitStrength} bits) is " +
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"not acceptable according to the public key algorithm policy.")
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}
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}
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}
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}
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@JvmStatic
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fun signatureUsesAcceptableHashAlgorithm(policy: Policy): SignatureValidator {
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return object : SignatureValidator() {
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override fun verify(signature: PGPSignature) {
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try {
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val algorithmPolicy = getHashAlgorithmPolicyForSignature(signature, policy)
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if (!algorithmPolicy.isAcceptable(
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signature.signatureHashAlgorithm, signature.creationTime)) {
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throw SignatureValidationException(
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"Signature uses unacceptable" +
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" hash algorithm ${signature.signatureHashAlgorithm}" +
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" (Signature creation time: ${signature.creationTime.formatUTC()})")
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}
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} catch (e: NoSuchElementException) {
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throw SignatureValidationException(
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"Signature uses unknown hash" + " algorithm ${signature.hashAlgorithm}")
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}
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}
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}
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}
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/**
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* Return the applicable [Policy.HashAlgorithmPolicy] for the given [PGPSignature].
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* Revocation signatures are being policed using a different policy than non-revocation
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* signatures.
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*
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* @param signature signature
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* @param policy revocation policy for revocation sigs, normal policy for non-rev sigs
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* @return policy
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*/
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@JvmStatic
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private fun getHashAlgorithmPolicyForSignature(
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signature: PGPSignature,
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policy: Policy
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): Policy.HashAlgorithmPolicy {
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return when (SignatureType.fromCode(signature.signatureType)) {
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null -> policy.certificationSignatureHashAlgorithmPolicy
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SignatureType.CERTIFICATION_REVOCATION,
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SignatureType.KEY_REVOCATION,
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SignatureType.SUBKEY_REVOCATION -> policy.revocationSignatureHashAlgorithmPolicy
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SignatureType.GENERIC_CERTIFICATION,
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SignatureType.NO_CERTIFICATION,
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SignatureType.CASUAL_CERTIFICATION,
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SignatureType.POSITIVE_CERTIFICATION,
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SignatureType.DIRECT_KEY,
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SignatureType.SUBKEY_BINDING,
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SignatureType.PRIMARYKEY_BINDING -> policy.certificationSignatureHashAlgorithmPolicy
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else -> policy.dataSignatureHashAlgorithmPolicy
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}
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}
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/**
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* Verify that a signature does not carry critical unknown notations.
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*
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* @param registry notation registry of known notations
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* @return validator
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*/
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@JvmStatic
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fun signatureDoesNotHaveCriticalUnknownNotations(
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registry: NotationRegistry
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): SignatureValidator {
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return object : SignatureValidator() {
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override fun verify(signature: PGPSignature) {
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SignatureSubpacketsUtil.getHashedNotationData(signature)
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.filter { it.isCritical && !registry.isKnownNotation(it.notationName) }
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.forEach {
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throw SignatureValidationException(
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"Signature contains unknown critical notation '${it.notationName}' in its hashed area.")
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}
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}
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}
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}
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/**
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* Verify that a signature does not contain critical unknown subpackets.
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*
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* @return validator
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*/
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@JvmStatic
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fun signatureDoesNotHaveCriticalUnknownSubpackets(): SignatureValidator {
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return object : SignatureValidator() {
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override fun verify(signature: PGPSignature) {
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signature.hashedSubPackets.criticalTags.forEach {
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try {
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SignatureSubpacket.requireFromCode(it)
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} catch (e: NoSuchElementException) {
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throw SignatureValidationException(
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"Signature contains unknown critical subpacket of type 0x${Integer.toHexString(it)}")
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}
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}
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}
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}
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}
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/**
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* Verify that a signature is effective at the given reference date.
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*
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* @param referenceTime reference date for signature verification
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* @return validator
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*/
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@JvmStatic
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@JvmOverloads
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fun signatureIsEffective(referenceTime: Date = Date()): SignatureValidator {
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return object : SignatureValidator() {
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override fun verify(signature: PGPSignature) {
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signatureIsAlreadyEffective(referenceTime).verify(signature)
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signatureIsNotYetExpired(referenceTime).verify(signature)
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}
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}
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}
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/**
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* Verify that a signature was created prior to the given reference date.
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*
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* @param referenceTime reference date for signature verification
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* @return validator
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*/
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@JvmStatic
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fun signatureIsAlreadyEffective(referenceTime: Date): SignatureValidator {
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return object : SignatureValidator() {
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override fun verify(signature: PGPSignature) {
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if (signature.isHardRevocation) {
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return
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}
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if (signature.creationTime > referenceTime) {
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throw SignatureValidationException(
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"Signature was created at ${signature.creationTime.formatUTC()} and" +
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" is therefore not yet valid at ${referenceTime.formatUTC()}")
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}
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}
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}
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}
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/**
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* Verify that a signature is not yet expired.
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*
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* @param referenceTime reference date for signature verification
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* @return validator
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*/
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@JvmStatic
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fun signatureIsNotYetExpired(referenceTime: Date): SignatureValidator {
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return object : SignatureValidator() {
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override fun verify(signature: PGPSignature) {
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if (signature.isHardRevocation) {
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return
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}
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val expirationDate = signature.signatureExpirationDate
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if (expirationDate != null && expirationDate < referenceTime) {
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throw SignatureValidationException(
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"Signature is already expired " +
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"(expiration: ${expirationDate.formatUTC()}," +
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" validation: ${referenceTime.formatUTC()})")
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}
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}
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}
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}
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/**
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* Verify that a signature is not malformed. A signature is malformed if it has no hashed
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* creation time subpacket, it predates the creation time of the signing key, or it predates
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* the creation date of the signing key binding signature.
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*
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* @param signingKey signing key
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* @return validator
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*/
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@JvmStatic
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fun signatureIsNotMalformed(signingKey: PGPPublicKey): SignatureValidator {
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return object : SignatureValidator() {
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override fun verify(signature: PGPSignature) {
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if (signature.version >= 4) {
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signatureHasHashedCreationTime().verify(signature)
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}
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signatureDoesNotPredateSigningKey(signingKey).verify(signature)
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if (!signature.isOfType(SignatureType.PRIMARYKEY_BINDING)) {
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signatureDoesNotPredateSigningKeyBindingDate(signingKey).verify(signature)
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}
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}
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}
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}
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@JvmStatic
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fun signatureDoesNotPredateSignee(signee: PGPPublicKey): SignatureValidator {
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return signatureDoesNotPredateKeyCreation(signee)
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}
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/**
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* Verify that a signature does not predate the creation time of the signing key.
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*
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* @param key signing key
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* @return validator
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*/
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@JvmStatic
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fun signatureDoesNotPredateSigningKey(signingKey: PGPPublicKey): SignatureValidator {
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return signatureDoesNotPredateKeyCreation(signingKey)
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}
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/**
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* Verify that a signature does not predate the creation time of the given key.
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*
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* @param key key
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* @return validator
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*/
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@JvmStatic
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fun signatureDoesNotPredateKeyCreation(key: PGPPublicKey): SignatureValidator {
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return object : SignatureValidator() {
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override fun verify(signature: PGPSignature) {
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if (key.creationTime > signature.creationTime) {
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throw SignatureValidationException(
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"Signature predates key" +
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" (key creation: ${key.creationTime.formatUTC()}," +
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" signature creation: ${signature.creationTime.formatUTC()})")
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}
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}
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}
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}
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/**
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* Verify that a signature has a hashed creation time subpacket.
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*
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* @return validator
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*/
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@JvmStatic
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fun signatureHasHashedCreationTime(): SignatureValidator {
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return object : SignatureValidator() {
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override fun verify(signature: PGPSignature) {
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if (SignatureSubpacketsUtil.getSignatureCreationTime(signature) == null) {
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throw SignatureValidationException(
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"Malformed signature." +
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"Signature has no signature creation time subpacket in its hashed area.")
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}
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}
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}
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}
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/**
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* Verify that a signature does not predate the binding date of the signing key.
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*
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* @param signingKey signing key
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* @return validator
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*/
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@JvmStatic
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fun signatureDoesNotPredateSigningKeyBindingDate(
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signingKey: PGPPublicKey
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): SignatureValidator {
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return object : SignatureValidator() {
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override fun verify(signature: PGPSignature) {
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if (signingKey.isMasterKey) {
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return
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}
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if (signingKey
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.getSignaturesOfType(SignatureType.SUBKEY_BINDING.code)
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.asSequence()
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.map {
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if (signature.creationTime < it.creationTime) {
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throw SignatureValidationException(
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"Signature was created " +
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"before the signing key was bound to the certificate.")
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}
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}
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.none()) {
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throw SignatureValidationException(
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"Signing subkey does not have a subkey binding signature.")
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}
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}
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}
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}
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/**
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* Verify that a direct-key signature is correct.
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*
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* @param signingKey signing key
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* @param signedKey signed key
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* @return validator
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*/
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@JvmStatic
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fun correctSignatureOverKey(
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signingKey: PGPPublicKey,
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signedKey: PGPPublicKey
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): SignatureValidator {
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return object : SignatureValidator() {
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override fun verify(signature: PGPSignature) {
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try {
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signature.init(
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OpenPGPImplementation.getInstance().pgpContentVerifierBuilderProvider(),
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signingKey)
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val valid =
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if (signingKey.keyID == signedKey.keyID ||
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signature.isOfType(SignatureType.DIRECT_KEY)) {
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signature.verifyCertification(signedKey)
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} else {
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signature.verifyCertification(signingKey, signedKey)
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}
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if (!valid) {
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throw SignatureValidationException("Signature is not correct.")
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}
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} catch (e: PGPException) {
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throw SignatureValidationException(
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"Cannot verify direct-key signature correctness", e)
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} catch (e: ClassCastException) {
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throw SignatureValidationException(
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"Cannot verify direct-key signature correctness", e)
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}
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}
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}
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}
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@JvmStatic
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fun signatureIsCertification(): SignatureValidator {
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return signatureIsOfType(
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SignatureType.POSITIVE_CERTIFICATION,
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SignatureType.CASUAL_CERTIFICATION,
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SignatureType.GENERIC_CERTIFICATION,
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SignatureType.NO_CERTIFICATION)
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}
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|
||||||
/**
|
|
||||||
* Verify that a signature type equals one of the given [SignatureType].
|
|
||||||
*
|
|
||||||
* @param signatureType one or more signature types
|
|
||||||
* @return validator
|
|
||||||
*/
|
|
||||||
@JvmStatic
|
|
||||||
fun signatureIsOfType(vararg signatureType: SignatureType): SignatureValidator {
|
|
||||||
return object : SignatureValidator() {
|
|
||||||
override fun verify(signature: PGPSignature) {
|
|
||||||
if (signatureType.none { signature.isOfType(it) }) {
|
|
||||||
throw SignatureValidationException(
|
|
||||||
"Signature is of type" +
|
|
||||||
" ${SignatureType.fromCode(signature.signatureType) ?:
|
|
||||||
("0x" + signature.signatureType.toString(16))}, " +
|
|
||||||
"while only ${signatureType.contentToString()} are allowed here.")
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Verify that a signature over a user-id is correct.
|
|
||||||
*
|
|
||||||
* @param userId user-id
|
|
||||||
* @param certifiedKey key carrying the user-id
|
|
||||||
* @param certifyingKey key that created the signature.
|
|
||||||
* @return validator
|
|
||||||
*/
|
|
||||||
@JvmStatic
|
|
||||||
fun correctSignatureOverUserId(
|
|
||||||
userId: CharSequence,
|
|
||||||
certifiedKey: PGPPublicKey,
|
|
||||||
certifyingKey: PGPPublicKey
|
|
||||||
): SignatureValidator {
|
|
||||||
return object : SignatureValidator() {
|
|
||||||
override fun verify(signature: PGPSignature) {
|
|
||||||
try {
|
|
||||||
signature.init(
|
|
||||||
OpenPGPImplementation.getInstance().pgpContentVerifierBuilderProvider(),
|
|
||||||
certifyingKey)
|
|
||||||
if (!signature.verifyCertification(userId.toString(), certifiedKey)) {
|
|
||||||
throw SignatureValidationException(
|
|
||||||
"Signature over user-id '$userId' is not valid.")
|
|
||||||
}
|
|
||||||
} catch (e: PGPException) {
|
|
||||||
throw SignatureValidationException(
|
|
||||||
"Cannot verify signature over user-id '$userId'.", e)
|
|
||||||
} catch (e: ClassCastException) {
|
|
||||||
throw SignatureValidationException(
|
|
||||||
"Cannot verify signature over user-id '$userId'.", e)
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Verify that a signature over a user-attribute packet is correct.
|
|
||||||
*
|
|
||||||
* @param userAttributes user attributes
|
|
||||||
* @param certifiedKey key carrying the user-attributes
|
|
||||||
* @param certifyingKey key that created the certification signature
|
|
||||||
* @return validator
|
|
||||||
*/
|
|
||||||
@JvmStatic
|
|
||||||
fun correctSignatureOverUserAttributes(
|
|
||||||
userAttributes: PGPUserAttributeSubpacketVector,
|
|
||||||
certifiedKey: PGPPublicKey,
|
|
||||||
certifyingKey: PGPPublicKey
|
|
||||||
): SignatureValidator {
|
|
||||||
return object : SignatureValidator() {
|
|
||||||
override fun verify(signature: PGPSignature) {
|
|
||||||
try {
|
|
||||||
signature.init(
|
|
||||||
OpenPGPImplementation.getInstance().pgpContentVerifierBuilderProvider(),
|
|
||||||
certifyingKey)
|
|
||||||
if (!signature.verifyCertification(userAttributes, certifiedKey)) {
|
|
||||||
throw SignatureValidationException(
|
|
||||||
"Signature over user-attributes is not correct.")
|
|
||||||
}
|
|
||||||
} catch (e: PGPException) {
|
|
||||||
throw SignatureValidationException(
|
|
||||||
"Cannot verify signature over user-attribute vector.", e)
|
|
||||||
} catch (e: ClassCastException) {
|
|
||||||
throw SignatureValidationException(
|
|
||||||
"Cannot verify signature over user-attribute vector.", e)
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
@JvmStatic
|
@JvmStatic
|
||||||
fun signatureWasCreatedInBounds(notBefore: Date?, notAfter: Date?): SignatureValidator {
|
fun signatureWasCreatedInBounds(notBefore: Date?, notAfter: Date?): SignatureValidator {
|
||||||
return object : SignatureValidator() {
|
return object : SignatureValidator() {
|
||||||
|
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue