diff --git a/crypto/src/crypto/signers/Ed25519Signer.cs b/crypto/src/crypto/signers/Ed25519Signer.cs
index 3776880db..1b3142c7b 100644
--- a/crypto/src/crypto/signers/Ed25519Signer.cs
+++ b/crypto/src/crypto/signers/Ed25519Signer.cs
@@ -59,7 +59,7 @@ namespace Org.BouncyCastle.Crypto.Signers
public virtual byte[] GenerateSignature()
{
- if (!forSigning)
+ if (!forSigning || null == privateKey)
throw new InvalidOperationException("Ed25519Signer not initialised for signature generation.");
return buffer.GenerateSignature(privateKey, publicKey);
@@ -67,7 +67,7 @@ namespace Org.BouncyCastle.Crypto.Signers
public virtual bool VerifySignature(byte[] signature)
{
- if (forSigning)
+ if (forSigning || null == publicKey)
throw new InvalidOperationException("Ed25519Signer not initialised for verification");
return buffer.VerifySignature(publicKey, signature);
diff --git a/crypto/src/crypto/signers/Ed25519ctxSigner.cs b/crypto/src/crypto/signers/Ed25519ctxSigner.cs
index 9a7b2b904..965453011 100644
--- a/crypto/src/crypto/signers/Ed25519ctxSigner.cs
+++ b/crypto/src/crypto/signers/Ed25519ctxSigner.cs
@@ -61,7 +61,7 @@ namespace Org.BouncyCastle.Crypto.Signers
public virtual byte[] GenerateSignature()
{
- if (!forSigning)
+ if (!forSigning || null == privateKey)
throw new InvalidOperationException("Ed25519ctxSigner not initialised for signature generation.");
return buffer.GenerateSignature(privateKey, publicKey, context);
@@ -69,7 +69,7 @@ namespace Org.BouncyCastle.Crypto.Signers
public virtual bool VerifySignature(byte[] signature)
{
- if (forSigning)
+ if (forSigning || null == publicKey)
throw new InvalidOperationException("Ed25519ctxSigner not initialised for verification");
return buffer.VerifySignature(publicKey, context, signature);
diff --git a/crypto/src/crypto/signers/Ed25519phSigner.cs b/crypto/src/crypto/signers/Ed25519phSigner.cs
index 0d3de96f3..3318f6438 100644
--- a/crypto/src/crypto/signers/Ed25519phSigner.cs
+++ b/crypto/src/crypto/signers/Ed25519phSigner.cs
@@ -60,7 +60,7 @@ namespace Org.BouncyCastle.Crypto.Signers
public virtual byte[] GenerateSignature()
{
- if (!forSigning)
+ if (!forSigning || null == privateKey)
throw new InvalidOperationException("Ed25519phSigner not initialised for signature generation.");
byte[] msg = new byte[Ed25519.PrehashSize];
@@ -74,7 +74,7 @@ namespace Org.BouncyCastle.Crypto.Signers
public virtual bool VerifySignature(byte[] signature)
{
- if (forSigning)
+ if (forSigning || null == publicKey)
throw new InvalidOperationException("Ed25519phSigner not initialised for verification");
byte[] pk = publicKey.GetEncoded();
diff --git a/crypto/src/crypto/signers/Ed448Signer.cs b/crypto/src/crypto/signers/Ed448Signer.cs
index 44e26b94f..d18f956a8 100644
--- a/crypto/src/crypto/signers/Ed448Signer.cs
+++ b/crypto/src/crypto/signers/Ed448Signer.cs
@@ -61,7 +61,7 @@ namespace Org.BouncyCastle.Crypto.Signers
public virtual byte[] GenerateSignature()
{
- if (!forSigning)
+ if (!forSigning || null == privateKey)
throw new InvalidOperationException("Ed448Signer not initialised for signature generation.");
return buffer.GenerateSignature(privateKey, publicKey, context);
@@ -69,7 +69,7 @@ namespace Org.BouncyCastle.Crypto.Signers
public virtual bool VerifySignature(byte[] signature)
{
- if (forSigning)
+ if (forSigning || null == publicKey)
throw new InvalidOperationException("Ed448Signer not initialised for verification");
return buffer.VerifySignature(publicKey, context, signature);
diff --git a/crypto/src/crypto/signers/Ed448phSigner.cs b/crypto/src/crypto/signers/Ed448phSigner.cs
index 50d0a0154..b86d0855c 100644
--- a/crypto/src/crypto/signers/Ed448phSigner.cs
+++ b/crypto/src/crypto/signers/Ed448phSigner.cs
@@ -60,7 +60,7 @@ namespace Org.BouncyCastle.Crypto.Signers
public virtual byte[] GenerateSignature()
{
- if (!forSigning)
+ if (!forSigning || null == privateKey)
throw new InvalidOperationException("Ed448phSigner not initialised for signature generation.");
byte[] msg = new byte[Ed448.PrehashSize];
@@ -74,7 +74,7 @@ namespace Org.BouncyCastle.Crypto.Signers
public virtual bool VerifySignature(byte[] signature)
{
- if (forSigning)
+ if (forSigning || null == publicKey)
throw new InvalidOperationException("Ed448phSigner not initialised for verification");
byte[] pk = publicKey.GetEncoded();
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