YT-22308: Change TSignature interface

- Add a constructor from TYsonString
- Make TSignatureGenerator fill out the Signature_ and Header_ fields in a given TSignature based on its payload
commit_hash:5918e13134db4306795de57a40c7f96b6b37cc4c

3 files changed, 22 insertions, 0 deletions

diff --git a/yt/yt/client/signature/signature.cpp b/yt/yt/client/signature/signature.cpp
index 0a71e0a02c..4c071c1407 100644
--- a/yt/yt/client/signature/signature.cpp
+++ b/yt/yt/client/signature/signature.cpp
@@ -14,6 +14,12 @@ using namespace NYTree;
 
 ////////////////////////////////////////////////////////////////////////////////
 
+TSignature::TSignature(NYson::TYsonString payload)
+    : Payload_(std::move(payload))
+{ }
+
+////////////////////////////////////////////////////////////////////////////////
+
 const TYsonString& TSignature::Payload() const
 {
     return Payload_;
diff --git a/yt/yt/client/signature/signature.h b/yt/yt/client/signature/signature.h
index e0025b7a27..f6602994ce 100644
--- a/yt/yt/client/signature/signature.h
+++ b/yt/yt/client/signature/signature.h
@@ -15,6 +15,14 @@ namespace NYT::NSignature {
 class TSignature final
 {
 public:
+    // NB(pavook) only needed for Deserialize internals.
+
+    //! Constructs an empty TSignature.
+    TSignature() = default;
+
+    //! Creates a TSignature containing the given payload without an actual signature.
+    explicit TSignature(NYson::TYsonString payload);
+
     [[nodiscard]] const NYson::TYsonString& Payload() const;
 
 private:
diff --git a/yt/yt/client/signature/unittests/signature_ut.cpp b/yt/yt/client/signature/unittests/signature_ut.cpp
index 2639715746..75ae1733fa 100644
--- a/yt/yt/client/signature/unittests/signature_ut.cpp
+++ b/yt/yt/client/signature/unittests/signature_ut.cpp
@@ -16,6 +16,14 @@ using namespace NYTree;
 
 ////////////////////////////////////////////////////////////////////////////////
 
+TEST(TSignatureTest, PayloadConstruct)
+{
+    TSignature signature(TYsonString("payload"_sb));
+    EXPECT_EQ(signature.Payload().ToString(), "payload");
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
 TEST(TSignatureTest, DeserializeSerialize)
 {
     // SignatureSize bytes.