From d43dc816b484f77b8c298943e4aeecb63e58cff6 Mon Sep 17 00:00:00 2001
From: Matthias Wiedemann <mwiede@gmx.de>
Date: Tue, 26 Sep 2023 08:11:41 +0000
Subject: [PATCH] #392 replace call to BigInteger.intValueExact to remain
 comptaible with android api 30

---
 src/main/java/com/jcraft/jsch/KeyPairPKCS8.java | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/jcraft/jsch/KeyPairPKCS8.java b/src/main/java/com/jcraft/jsch/KeyPairPKCS8.java
index 048bd80d..e1845cf1 100644
--- a/src/main/java/com/jcraft/jsch/KeyPairPKCS8.java
+++ b/src/main/java/com/jcraft/jsch/KeyPairPKCS8.java
@@ -862,6 +862,13 @@ static Cipher getCipher(byte[] id, ASN1 encryptparams, byte[][] ivp) throws Exce
   }
 
   static int parseASN1IntegerAsInt(byte[] content) {
-    return new BigInteger(content).intValueExact();
+    BigInteger b = new BigInteger(content);
+    // https://github.com/mwiede/jsch/issues/392 not using intValueExact() because of Android
+    // incompatibility.
+    if (b.bitLength() <= 31) {
+      return b.intValue();
+    } else {
+      throw new ArithmeticException("BigInteger out of int range");
+    }
   }
 }