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Throw NoSuchMessageException if attachment is invalid.

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This commit is contained in:
akwizgran
2021-01-22 14:01:36 +00:00
parent aed5ac5bb4
commit e616fc3da7
4 changed files with 11 additions and 30 deletions
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8
briar-api/src/main/java/org/briarproject/briar/api/attachment/AttachmentReader.java
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@@ -1,15 +1,19 @@
package org.briarproject.briar.api.attachment;
import org.briarproject.bramble.api.db.DbException;
import org.briarproject.bramble.api.db.NoSuchMessageException;
public interface AttachmentReader {
/**
* Returns the attachment with the given attachment header.
*
* @throws InvalidAttachmentException If the header refers to a message
* @throws NoSuchMessageException If the header refers to a message in
* a different group from the one specified in the header, to a message
* that is not an attachment, or to an attachment that does not have the
* expected content type
* expected content type. This is meant to prevent social engineering
* attacks that use invalid attachment IDs to test whether messages exist
* in the victim's database
*/
Attachment getAttachment(AttachmentHeader h) throws DbException;

21
briar-api/src/main/java/org/briarproject/briar/api/attachment/InvalidAttachmentException.java
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@@ -1,21 +0,0 @@
package org.briarproject.briar.api.attachment;
import org.briarproject.bramble.api.db.DbException;
import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
/**
* An exception that is thrown when an {@link AttachmentHeader} is used to
* load an {@link Attachment}, and the header refers to a message that is not
* an attachment, or to an attachment that does not have the expected content
* type.
*/
@NotNullByDefault
public class InvalidAttachmentException extends DbException {
public InvalidAttachmentException() {
super();
}
public InvalidAttachmentException(Throwable t) {
super(t);
}
}