Add HashFunction::copy_state

See GH #1037

2 files changed, 18 insertions, 0 deletions

diff --git a/src/lib/hash/sha2_64/sha2_64.cpp b/src/lib/hash/sha2_64/sha2_64.cpp
index 59242ee9c..8e01b6b4d 100644
--- a/src/lib/hash/sha2_64/sha2_64.cpp
+++ b/src/lib/hash/sha2_64/sha2_64.cpp
@@ -9,6 +9,21 @@
 
 namespace Botan {
 
+std::unique_ptr<HashFunction> SHA_384::copy_state() const
+   {
+   return std::unique_ptr<HashFunction>(new SHA_384(*this));
+   }
+
+std::unique_ptr<HashFunction> SHA_512::copy_state() const
+   {
+   return std::unique_ptr<HashFunction>(new SHA_512(*this));
+   }
+
+std::unique_ptr<HashFunction> SHA_512_256::copy_state() const
+   {
+   return std::unique_ptr<HashFunction>(new SHA_512_256(*this));
+   }
+
 namespace {
 
 namespace SHA2_64 {
diff --git a/src/lib/hash/sha2_64/sha2_64.h b/src/lib/hash/sha2_64/sha2_64.h
index 51bdb2b77..b027c4d27 100644
--- a/src/lib/hash/sha2_64/sha2_64.h
+++ b/src/lib/hash/sha2_64/sha2_64.h
@@ -21,6 +21,7 @@ class BOTAN_DLL SHA_384 final : public MDx_HashFunction
       std::string name() const override { return "SHA-384"; }
       size_t output_length() const override { return 48; }
       HashFunction* clone() const override { return new SHA_384; }
+      std::unique_ptr<HashFunction> copy_state() const override;
 
       void clear() override;
 
@@ -42,6 +43,7 @@ class BOTAN_DLL SHA_512 final : public MDx_HashFunction
       std::string name() const override { return "SHA-512"; }
       size_t output_length() const override { return 64; }
       HashFunction* clone() const override { return new SHA_512; }
+      std::unique_ptr<HashFunction> copy_state() const override;
 
       void clear() override;
 
@@ -63,6 +65,7 @@ class BOTAN_DLL SHA_512_256 final : public MDx_HashFunction
       std::string name() const override { return "SHA-512-256"; }
       size_t output_length() const override { return 32; }
       HashFunction* clone() const override { return new SHA_512_256; }
+      std::unique_ptr<HashFunction> copy_state() const override;
 
       void clear() override;