Add PK_Signer::signature_length

2 files changed, 4 insertions, 0 deletions

diff --git a/src/lib/prov/pkcs11/p11_ecdsa.cpp b/src/lib/prov/pkcs11/p11_ecdsa.cpp
index a93e761b1..bdea2c1fa 100644
--- a/src/lib/prov/pkcs11/p11_ecdsa.cpp
+++ b/src/lib/prov/pkcs11/p11_ecdsa.cpp
@@ -100,6 +100,8 @@ class PKCS11_ECDSA_Signature_Operation final : public PK_Ops::Signature
          return signature;
          }
 
+      size_t signature_length() const override { return 2*m_order.bytes(); }
+
    private:
       const PKCS11_EC_PrivateKey& m_key;
       const BigInt& m_order;
diff --git a/src/lib/prov/pkcs11/p11_rsa.cpp b/src/lib/prov/pkcs11/p11_rsa.cpp
index e62c038ec..65bcd2d22 100644
--- a/src/lib/prov/pkcs11/p11_rsa.cpp
+++ b/src/lib/prov/pkcs11/p11_rsa.cpp
@@ -206,6 +206,8 @@ class PKCS11_RSA_Signature_Operation final : public PK_Ops::Signature
          : m_key(key), m_mechanism(MechanismWrapper::create_rsa_sign_mechanism(padding))
          {}
 
+      size_t signature_length() const override { return m_key.get_n().bytes(); }
+
       void update(const uint8_t msg[], size_t msg_len) override
          {
          if(!m_initialized)