1 files changed, 112 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/ffi/ffi_block.cpp b/comm/third_party/botan/src/lib/ffi/ffi_block.cpp
new file mode 100644
index 0000000000..fa5c25c57e
--- /dev/null
+++ b/comm/third_party/botan/src/lib/ffi/ffi_block.cpp
@@ -0,0 +1,112 @@
+/*
+* (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/block_cipher.h>
+
+extern "C" {
+
+using namespace Botan_FFI;
+
+BOTAN_FFI_DECLARE_STRUCT(botan_block_cipher_struct, Botan::BlockCipher, 0x64C29716);
+
+int botan_block_cipher_init(botan_block_cipher_t* bc, const char* bc_name)
+   {
+   return ffi_guard_thunk(__func__, [=]() -> int {
+      if(bc == nullptr || bc_name == nullptr || *bc_name == 0)
+         return BOTAN_FFI_ERROR_NULL_POINTER;
+
+      *bc = nullptr;
+
+      std::unique_ptr<Botan::BlockCipher> cipher(Botan::BlockCipher::create(bc_name));
+      if(cipher == nullptr)
+         return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
+
+      *bc = new botan_block_cipher_struct(cipher.release());
+      return BOTAN_FFI_SUCCESS;
+      });
+   }
+
+/**
+* Destroy a block cipher object
+*/
+int botan_block_cipher_destroy(botan_block_cipher_t bc)
+   {
+   return BOTAN_FFI_CHECKED_DELETE(bc);
+   }
+
+int botan_block_cipher_clear(botan_block_cipher_t bc)
+   {
+   return BOTAN_FFI_DO(Botan::BlockCipher, bc, b, { b.clear(); });
+   }
+
+/**
+* Set the key for a block cipher instance
+*/
+int botan_block_cipher_set_key(botan_block_cipher_t bc,
+                               const uint8_t key[], size_t len)
+   {
+   if(key == nullptr)
+      return BOTAN_FFI_ERROR_NULL_POINTER;
+   return BOTAN_FFI_DO(Botan::BlockCipher, bc, b, { b.set_key(key, len); });
+   }
+
+/**
+* Return the positive block size of this block cipher, or negative to
+* indicate an error
+*/
+int botan_block_cipher_block_size(botan_block_cipher_t bc)
+   {
+   return BOTAN_FFI_RETURNING(Botan::BlockCipher, bc, b,
+                              { return static_cast<int>(b.block_size()); });
+   }
+
+int botan_block_cipher_encrypt_blocks(botan_block_cipher_t bc,
+                                      const uint8_t in[],
+                                      uint8_t out[],
+                                      size_t blocks)
+   {
+   if(in == nullptr || out == nullptr)
+      return BOTAN_FFI_ERROR_NULL_POINTER;
+   return BOTAN_FFI_DO(Botan::BlockCipher, bc, b, { b.encrypt_n(in, out, blocks); });
+   }
+
+int botan_block_cipher_decrypt_blocks(botan_block_cipher_t bc,
+                                      const uint8_t in[],
+                                      uint8_t out[],
+                                      size_t blocks)
+   {
+   if(in == nullptr || out == nullptr)
+      return BOTAN_FFI_ERROR_NULL_POINTER;
+   return BOTAN_FFI_DO(Botan::BlockCipher, bc, b, { b.decrypt_n(in, out, blocks); });
+   }
+
+int botan_block_cipher_name(botan_block_cipher_t cipher, char* name, size_t* name_len)
+   {
+   if(name_len == nullptr)
+      return BOTAN_FFI_ERROR_NULL_POINTER;
+
+   return BOTAN_FFI_DO(Botan::BlockCipher, cipher, bc, {
+      return write_str_output(name, name_len, bc.name()); });
+   }
+
+int botan_block_cipher_get_keyspec(botan_block_cipher_t cipher,
+                                   size_t* out_minimum_keylength,
+                                   size_t* out_maximum_keylength,
+                                   size_t* out_keylength_modulo)
+   {
+   return BOTAN_FFI_DO(Botan::BlockCipher, cipher, bc, {
+      if(out_minimum_keylength)
+         *out_minimum_keylength = bc.minimum_keylength();
+      if(out_maximum_keylength)
+         *out_maximum_keylength = bc.maximum_keylength();
+      if(out_keylength_modulo)
+         *out_keylength_modulo = bc.key_spec().keylength_multiple();
+      });
+   }
+
+}