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open-keychain
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Code Issues Releases Wiki Activity

warn on signature earlier than key creation, err on significantly earlier

This commit is contained in:
Vincent Breitmoser 2015-05-28 11:40:35 +02:00
parent 5c8af1c5a5
commit eb830c6786
3 changed files with 23 additions and 0 deletions
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1
OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/results/OperationResult.java
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@ -401,6 +401,7 @@ public abstract class OperationResult implements Parcelable {
MSG_KC_SUB_BAD_LOCAL(LogLevel.WARN, R.string.msg_kc_sub_bad_local),
MSG_KC_SUB_BAD_KEYID(LogLevel.WARN, R.string.msg_kc_sub_bad_keyid),
MSG_KC_SUB_BAD_TIME(LogLevel.WARN, R.string.msg_kc_sub_bad_time),
MSG_KC_SUB_BAD_TIME_EARLY(LogLevel.WARN, R.string.msg_kc_sub_bad_time_early),
MSG_KC_SUB_BAD_TYPE(LogLevel.WARN, R.string.msg_kc_sub_bad_type),
MSG_KC_SUB_DUP (LogLevel.DEBUG, R.string.msg_kc_sub_dup),
MSG_KC_SUB_PRIMARY_BAD(LogLevel.WARN, R.string.msg_kc_sub_primary_bad),

21
OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/UncachedKeyRing.java
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@ -820,6 +820,15 @@ public class UncachedKeyRing {
continue;
}
Date keyCreationTime = key.getCreationTime(), keyCreationTimeLenient;
{
Calendar keyCreationCal = Calendar.getInstance();
keyCreationCal.setTime(keyCreationTime);
// allow for diverging clocks up to one day when checking creation time
keyCreationCal.add(Calendar.MINUTE, -5);
keyCreationTimeLenient = keyCreationCal.getTime();
}
// A subkey needs exactly one subkey binding certificate, and optionally one revocation
// certificate.
PGPPublicKey modified = key;
@ -851,6 +860,18 @@ public class UncachedKeyRing {
continue;
}
if (cert.getCreationTime().before(keyCreationTime)) {
// Signature is earlier than key creation time
log.add(LogType.MSG_KC_SUB_BAD_TIME_EARLY, indent);
// due to an earlier accident, we generated keys which had creation timestamps
// a few seconds after their signature timestamp. for compatibility, we only
// error out with some margin of error
if (cert.getCreationTime().before(keyCreationTimeLenient)) {
badCerts += 1;
continue;
}
}
if (cert.isLocal()) {
// Creation date in the future? No way!
log.add(LogType.MSG_KC_SUB_BAD_LOCAL, indent);

1
OpenKeychain/src/main/res/values/strings.xml
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@ -829,6 +829,7 @@
<string name="msg_kc_sub_bad_local">"Removing subkey binding certificate with 'local' flag"</string>
<string name="msg_kc_sub_bad_keyid">"Subkey binding issuer id mismatch"</string>
<string name="msg_kc_sub_bad_time">"Removing subkey binding certificate with future timestamp"</string>
<string name="msg_kc_sub_bad_time_early">"Subkey binding certificate has earlier timestamp than its key!"</string>
<string name="msg_kc_sub_bad_type">"Unknown subkey certificate type: %s"</string>
<string name="msg_kc_sub_dup">"Removing redundant subkey binding certificate"</string>
<string name="msg_kc_sub_primary_bad">"Removing subkey binding certificate due to invalid primary binding certificate"</string>