Partial length encoding: Enforce minimum length of the first chunk

vanitasvitae · vanitasvitae · commit c54c7fd15363 · 2024-09-06T15:09:36.000+02:00
diff --git a/pg/src/main/java/org/bouncycastle/bcpg/BCPGInputStream.java b/pg/src/main/java/org/bouncycastle/bcpg/BCPGInputStream.java
@@ -205,6 +205,10 @@ public Packet readPacket()
             boolean[] flags = new boolean[3];
             bodyLen = StreamUtil.readBodyLen(this, flags);
             partial = flags[StreamUtil.flag_partial];
+            if (partial && bodyLen < 512)
+            {
+                throw new IOException("First chunk of partial body MUST have a length of at least 512 octets.");
+            }
         }
         else
         {

Original file line number	Diff line number	Diff line change
`@@ -205,6 +205,10 @@ public Packet readPacket()`
`205`	`205`	`boolean[] flags = new boolean[3];`
`206`	`206`	`bodyLen = StreamUtil.readBodyLen(this, flags);`
`207`	`207`	`partial = flags[StreamUtil.flag_partial];`
	`208`	`+ if (partial && bodyLen < 512)`
	`209`	`+ {`
	`210`	`+ throw new IOException("First chunk of partial body MUST have a length of at least 512 octets.");`
	`211`	`+ }`
`208`	`212`	`}`
`209`	`213`	`else`
`210`	`214`	`{`