diff --git a/crypto/test/src/math/ec/rfc8032/test/Ed25519Test.cs b/crypto/test/src/math/ec/rfc8032/test/Ed25519Test.cs
index 5a42daeae..8a61609af 100644
--- a/crypto/test/src/math/ec/rfc8032/test/Ed25519Test.cs
+++ b/crypto/test/src/math/ec/rfc8032/test/Ed25519Test.cs
@@ -36,7 +36,7 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032.Tests
Random.NextBytes(sk);
Ed25519.GeneratePublicKey(sk, 0, pk, 0);
- int mLen = Random.Next() & 255;
+ int mLen = Random.NextInt() & 255;
Ed25519.Sign(sk, 0, m, 0, mLen, sig1, 0);
Ed25519.Sign(sk, 0, pk, 0, m, 0, mLen, sig2, 0);
@@ -59,7 +59,7 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032.Tests
{
byte[] sk = new byte[Ed25519.SecretKeySize];
byte[] pk = new byte[Ed25519.PublicKeySize];
- byte[] ctx = new byte[Random.Next() & 7];
+ byte[] ctx = new byte[Random.NextInt() & 7];
byte[] m = new byte[255];
byte[] sig1 = new byte[Ed25519.SignatureSize];
byte[] sig2 = new byte[Ed25519.SignatureSize];
@@ -72,7 +72,7 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032.Tests
Random.NextBytes(sk);
Ed25519.GeneratePublicKey(sk, 0, pk, 0);
- int mLen = Random.Next() & 255;
+ int mLen = Random.NextInt() & 255;
Ed25519.Sign(sk, 0, ctx, m, 0, mLen, sig1, 0);
Ed25519.Sign(sk, 0, pk, 0, ctx, m, 0, mLen, sig2, 0);
@@ -95,7 +95,7 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032.Tests
{
byte[] sk = new byte[Ed25519.SecretKeySize];
byte[] pk = new byte[Ed25519.PublicKeySize];
- byte[] ctx = new byte[Random.Next() & 7];
+ byte[] ctx = new byte[Random.NextInt() & 7];
byte[] m = new byte[255];
byte[] ph = new byte[Ed25519.PrehashSize];
byte[] sig1 = new byte[Ed25519.SignatureSize];
@@ -109,7 +109,7 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032.Tests
Random.NextBytes(sk);
Ed25519.GeneratePublicKey(sk, 0, pk, 0);
- int mLen = Random.Next() & 255;
+ int mLen = Random.NextInt() & 255;
IDigest prehash = Ed25519.CreatePrehash();
prehash.BlockUpdate(m, 0, mLen);
diff --git a/crypto/test/src/math/ec/rfc8032/test/Ed448Test.cs b/crypto/test/src/math/ec/rfc8032/test/Ed448Test.cs
index 826f76345..cc8e82de0 100644
--- a/crypto/test/src/math/ec/rfc8032/test/Ed448Test.cs
+++ b/crypto/test/src/math/ec/rfc8032/test/Ed448Test.cs
@@ -25,7 +25,7 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032.Tests
{
byte[] sk = new byte[Ed448.SecretKeySize];
byte[] pk = new byte[Ed448.PublicKeySize];
- byte[] ctx = new byte[Random.Next() & 7];
+ byte[] ctx = new byte[Random.NextInt() & 7];
byte[] m = new byte[255];
byte[] sig1 = new byte[Ed448.SignatureSize];
byte[] sig2 = new byte[Ed448.SignatureSize];
@@ -38,7 +38,7 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032.Tests
Random.NextBytes(sk);
Ed448.GeneratePublicKey(sk, 0, pk, 0);
- int mLen = Random.Next() & 255;
+ int mLen = Random.NextInt() & 255;
Ed448.Sign(sk, 0, ctx, m, 0, mLen, sig1, 0);
Ed448.Sign(sk, 0, pk, 0, ctx, m, 0, mLen, sig2, 0);
@@ -61,7 +61,7 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032.Tests
{
byte[] sk = new byte[Ed448.SecretKeySize];
byte[] pk = new byte[Ed448.PublicKeySize];
- byte[] ctx = new byte[Random.Next() & 7];
+ byte[] ctx = new byte[Random.NextInt() & 7];
byte[] m = new byte[255];
byte[] ph = new byte[Ed448.PrehashSize];
byte[] sig1 = new byte[Ed448.SignatureSize];
@@ -75,7 +75,7 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032.Tests
Random.NextBytes(sk);
Ed448.GeneratePublicKey(sk, 0, pk, 0);
- int mLen = Random.Next() & 255;
+ int mLen = Random.NextInt() & 255;
IXof prehash = Ed448.CreatePrehash();
prehash.BlockUpdate(m, 0, mLen);
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