Add ed25519 SignStream and VerifyStream functions (GH #796, PR #797)

1 files changed, 21 insertions, 0 deletions

diff --git a/xed25519.cpp b/xed25519.cpp
index 6207e7e1..0ab77876 100644
--- a/xed25519.cpp
+++ b/xed25519.cpp
@@ -685,6 +685,17 @@ size_t ed25519Signer::SignAndRestart(RandomNumberGenerator &rng, PK_MessageAccum
     return ret == 0 ? SIGNATURE_LENGTH : 0;

 }

 

+size_t ed25519Signer::SignStream (RandomNumberGenerator &rng, std::istream& stream, byte *signature) const

+{

+    CRYPTOPP_ASSERT(signature != NULLPTR); CRYPTOPP_UNUSED(rng);

+

+    const ed25519PrivateKey& pk = static_cast<const ed25519PrivateKey&>(GetPrivateKey());

+    int ret = Donna::ed25519_sign(stream, pk.GetPrivateKeyBytePtr(), pk.GetPublicKeyBytePtr(), signature);

+    CRYPTOPP_ASSERT(ret == 0);

+

+    return ret == 0 ? SIGNATURE_LENGTH : 0;

+}

+

 // ******************** ed25519 Verifier ************************* //

 

 bool ed25519PublicKey::GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const

@@ -856,4 +867,14 @@ bool ed25519Verifier::VerifyAndRestart(PK_MessageAccumulator &messageAccumulator
     return ret == 0;

 }

 

+bool ed25519Verifier::VerifyStream(std::istream& stream, const byte *signature, size_t signatureLen) const

+{

+    CRYPTOPP_ASSERT(signatureLen == SIGNATURE_LENGTH);

+

+    const ed25519PublicKey& pk = static_cast<const ed25519PublicKey&>(GetPublicKey());

+    int ret = Donna::ed25519_sign_open(stream, pk.GetPublicKeyBytePtr(), signature);

+

+    return ret == 0;

+}

+

 NAMESPACE_END  // CryptoPP