From 8f183407bb57bacc6d91668adc124259788e441f Mon Sep 17 00:00:00 2001
From: Iceomatic <89707822+iceomatic@users.noreply.github.com>
Date: Sun, 13 Oct 2024 19:17:30 +0200
Subject: [PATCH] add: num_signatures == 0 check from SIMD-0152

---
 sdk/src/ed25519_instruction.rs   | 1 +
 sdk/src/secp256r1_instruction.rs | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/sdk/src/ed25519_instruction.rs b/sdk/src/ed25519_instruction.rs
index 45a8f1c2c2d932..a7bae6b4164a32 100644
--- a/sdk/src/ed25519_instruction.rs
+++ b/sdk/src/ed25519_instruction.rs
@@ -93,6 +93,7 @@ pub fn verify(
         return Err(PrecompileError::InvalidInstructionDataSize);
     }
     let num_signatures = data[0] as usize;
+    
     if num_signatures == 0 && data.len() > SIGNATURE_OFFSETS_START {
         return Err(PrecompileError::InvalidInstructionDataSize);
     }
diff --git a/sdk/src/secp256r1_instruction.rs b/sdk/src/secp256r1_instruction.rs
index 545cf52963759c..ca2e6a3e0313c6 100644
--- 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);
     }