add: num_signatures == 0 check from SIMD-0152

anza-xyz · Oct 13, 2024 · 4c753ff · 4c753ff
1 parent 226eeef
commit 4c753ff
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/sdk/src/secp256r1_instruction.rs b/sdk/src/secp256r1_instruction.rs
@@ -142,7 +142,9 @@ pub fn verify(
         return Err(PrecompileError::InvalidInstructionDataSize);
     }
     let num_signatures = data[0] as usize;
-
+    if num_signatures == 0 {
+        return Err(PrecompileError::InvalidInstructionDataSize);
+    }
     if num_signatures > 8 {
         return Err(PrecompileError::InvalidInstructionDataSize);
     }