1 files changed, 91 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/ffi/ffi_hash.cpp b/comm/third_party/botan/src/lib/ffi/ffi_hash.cpp
new file mode 100644
index 0000000000..12eb92301e
--- /dev/null
+++ b/comm/third_party/botan/src/lib/ffi/ffi_hash.cpp
@@ -0,0 +1,91 @@
+/*
+* (C) 2015,2017 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/ffi.h>
+#include <botan/internal/ffi_util.h>
+#include <botan/hash.h>
+
+extern "C" {
+
+using namespace Botan_FFI;
+
+BOTAN_FFI_DECLARE_STRUCT(botan_hash_struct, Botan::HashFunction, 0x1F0A4F84);
+
+int botan_hash_init(botan_hash_t* hash, const char* hash_name, uint32_t flags)
+   {
+   return ffi_guard_thunk(__func__, [=]() -> int {
+      if(hash == nullptr || hash_name == nullptr || *hash_name == 0)
+         return BOTAN_FFI_ERROR_NULL_POINTER;
+      if(flags != 0)
+         return BOTAN_FFI_ERROR_BAD_FLAG;
+
+      std::unique_ptr<Botan::HashFunction> h = Botan::HashFunction::create(hash_name);
+      if(h == nullptr)
+         return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
+
+      *hash = new botan_hash_struct(h.release());
+      return BOTAN_FFI_SUCCESS;
+      });
+   }
+
+int botan_hash_destroy(botan_hash_t hash)
+   {
+   return BOTAN_FFI_CHECKED_DELETE(hash);
+   }
+
+int botan_hash_output_length(botan_hash_t hash, size_t* out)
+   {
+   if(out == nullptr)
+      return BOTAN_FFI_ERROR_NULL_POINTER;
+   return BOTAN_FFI_DO(Botan::HashFunction, hash, h, { *out = h.output_length(); });
+   }
+
+int botan_hash_block_size(botan_hash_t hash, size_t* out)
+   {
+   if(out == nullptr)
+      return BOTAN_FFI_ERROR_NULL_POINTER;
+   return BOTAN_FFI_DO(Botan::HashFunction, hash, h, { *out = h.hash_block_size(); });
+   }
+
+int botan_hash_clear(botan_hash_t hash)
+   {
+   return BOTAN_FFI_DO(Botan::HashFunction, hash, h, { h.clear(); });
+   }
+
+int botan_hash_update(botan_hash_t hash, const uint8_t* buf, size_t len)
+   {
+   if(len == 0)
+      return 0;
+
+   if(buf == nullptr)
+      return BOTAN_FFI_ERROR_NULL_POINTER;
+
+   return BOTAN_FFI_DO(Botan::HashFunction, hash, h, { h.update(buf, len); });
+   }
+
+int botan_hash_final(botan_hash_t hash, uint8_t out[])
+   {
+   if(out == nullptr)
+      return BOTAN_FFI_ERROR_NULL_POINTER;
+   return BOTAN_FFI_DO(Botan::HashFunction, hash, h, { h.final(out); });
+   }
+
+int botan_hash_copy_state(botan_hash_t* dest, const botan_hash_t source)
+   {
+   return BOTAN_FFI_DO(Botan::HashFunction, source, src, {
+      *dest = new botan_hash_struct(src.copy_state().release()); });
+   }
+
+int botan_hash_name(botan_hash_t hash, char* name, size_t* name_len)
+   {
+   if(name_len == nullptr)
+      return BOTAN_FFI_ERROR_NULL_POINTER;
+
+   return BOTAN_FFI_DO(Botan::HashFunction, hash, h, {
+      return write_str_output(name, name_len, h.name()); });
+   }
+
+}