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-rw-r--r--src/rtl/keywrap_core.v213
-rw-r--r--src/rtl/keywrap_mem.v50
2 files changed, 239 insertions, 24 deletions
diff --git a/src/rtl/keywrap_core.v b/src/rtl/keywrap_core.v
new file mode 100644
index 0000000..eda8459
--- /dev/null
+++ b/src/rtl/keywrap_core.v
@@ -0,0 +1,213 @@
+//======================================================================
+//
+// keywrap_core.v
+// --------------
+// Core that tries to implement AES KEY WRAP as specified in
+// RFC 3394. Experimental core at the moment.
+// The maximum wrap object size is 64 kByte.
+//
+//
+// Author: Joachim Strombergson
+// Copyright (c) 2018, NORDUnet A/S
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// - Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// - Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// - Neither the name of the NORDUnet nor the names of its contributors may
+// be used to endorse or promote products derived from this software
+// without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+//======================================================================
+
+module keywrap_core (
+ input wire clk,
+ input wire reset_n,
+
+ input wire encdec,
+ input wire init,
+ output wire ready,
+ input wire [255 : 0] key,
+ input wire keylen,
+ input wire [13 : 0] message_len,
+
+ input wire api_we,
+ input wire [13 : 0] api_addr,
+ input wire [31 : 0] api_wr_data,
+ output wire [31 : 0] api_rd_data
+ );
+
+
+ //----------------------------------------------------------------
+ // Paramenters and local defines.
+ //----------------------------------------------------------------
+ localparam OUTER_LOOP_MAX = 6;
+
+
+ localparam CTRL_IDLE = 3'h0;
+ localparam CTRL_INIT = 3'h1;
+ localparam CTRL_NEXT = 3'h2;
+
+
+ //----------------------------------------------------------------
+ // Registers and memories including control signals.
+ //----------------------------------------------------------------
+ reg [63 : 0] a_reg;
+ reg [63 : 0] a_new;
+ reg a_we;
+ reg a_init;
+
+ reg ready_reg;
+ reg ready_new;
+ reg ready_we;
+
+ reg [12 : 0] block_loop_ctr_reg;
+ reg [12 : 0] block_loop_ctr_new;
+ reg block_loop_ctr_we;
+ reg block_loop_ctr_inc;
+ reg block_loop_ctr_rst;
+
+ reg [2 : 0] outer_loop_ctr_reg;
+ reg [2 : 0] outer_loop_ctr_new;
+ reg outer_loop_ctr_we;
+ reg outer_loop_ctr_inc;
+ reg outer_loop_ctr_dec;
+ reg outer_loop_ctr_set;
+ reg outer_loop_ctr_rst;
+
+ reg [12 : 0] core_addr_ctr_reg;
+ reg [12 : 0] core_addr_ctr_new;
+ reg core_addr_ctr_we;
+
+ reg [2 : 0] keywrap_core_ctrl_reg;
+ reg [2 : 0] keywrap_core_ctrl_new;
+ reg keywrap_core_ctrl_we;
+
+
+ //----------------------------------------------------------------
+ // Wires.
+ //----------------------------------------------------------------
+ reg aes_encdec;
+ reg aes_init;
+ reg aes_next;
+ wire aes_ready;
+ wire [255 : 0] aes_key;
+ wire aes_keylen;
+ reg [127 : 0] aes_block;
+ wire [127 : 0] aes_result;
+ wire aes_valid;
+
+ reg core_we;
+ reg [12 : 0] core_addr;
+ reg [63 : 0] core_wr_data;
+ wire [63 : 0] core_rd_data;
+
+
+ //----------------------------------------------------------------
+ // Instantiations.
+ //----------------------------------------------------------------
+ keywrap_mem mem(
+ .clk(),
+ .reset_n(),
+ .api_we(api_we),
+ .api_addr(api_addr),
+ .api_wr_data(api_wr_data),
+ .api_rd_data(api_rd_data),
+ .core_we(),
+ .core_addr(),
+ .core_wr_data(),
+ .core_rd_data()
+ );
+
+
+ aes_core aes(
+ .clk(clk),
+ .reset_n(reset_n),
+ .encdec(aes_encdec),
+ .init(aes_init),
+ .next(aes_next),
+ .ready(aes_ready),
+ .key(aes_key),
+ .keylen(aes_keylen),
+ .block(aes_block),
+ .result(aes_result),
+ .result_valid(aes_valid)
+ );
+
+ //----------------------------------------------------------------
+ // Assignments for ports.
+ //----------------------------------------------------------------
+
+
+ //----------------------------------------------------------------
+ // reg_update
+ //----------------------------------------------------------------
+ always @ (posedge clk or negedge reset_n)
+ begin: reg_update
+ if (!reset_n)
+ begin
+ keywrap_core_ctrl_reg <= CTRL_IDLE;
+
+ end
+
+ else
+ begin
+
+ if (keywrap_core_ctrl_we)
+ keywrap_core_ctrl_reg <= keywrap_core_ctrl_new;
+ end
+ end // reg_update
+
+
+ //----------------------------------------------------------------
+ // keywrap_core_ctrl
+ //----------------------------------------------------------------
+ always @*
+ begin : keywrap_core_ctrl
+ aes_encdec = 0;
+ aes_init = 0;
+ aes_next = 0;
+ block_loop_ctr_inc = 0;
+ block_loop_ctr_rst = 0;
+ outer_loop_ctr_inc = 0;
+ outer_loop_ctr_dec = 0;
+ outer_loop_ctr_set = 0;
+ outer_loop_ctr_rst = 0;
+
+
+ case (keywrap_core_ctrl_reg)
+ CTRL_IDLE:
+ begin
+ end
+
+ default:
+ begin
+
+ end
+ endcase // case (keywrap_core_ctrl_reg)
+ end // keywrap_core_ctrl
+
+endmodule // keywrap_core
+
+//======================================================================
+// EOF keywrap_core.v
+//======================================================================
diff --git a/src/rtl/keywrap_mem.v b/src/rtl/keywrap_mem.v
index 8ddb465..e54798a 100644
--- a/src/rtl/keywrap_mem.v
+++ b/src/rtl/keywrap_mem.v
@@ -37,46 +37,48 @@
//
//======================================================================
-module keywrap_mem
+module keywrap_mem (
+ input wire clk,
+ input wire reset_n,
- (
- input wire clk,
- input wire reset_n,
+ input wire api_we,
+ input wire [13 : 0] api_addr,
+ input wire [31 : 0] api_wr_data,
+ output wire [31 : 0] api_rd_data,
- input wire api_we,
- input wire [13 : 0] api_addr,
- input wire [31 : 0] api_wr_data,
- output wire [31 : 0] api_rd_data,
-
- input wire core_we,
- input wire [12 : 0] core_addr,
- input wire [63 : 0] core_wr_data,
- output wire [63 : 0] core_rd_data
- );
+ input wire core_we,
+ input wire [12 : 0] core_addr,
+ input wire [63 : 0] core_wr_data,
+ output wire [63 : 0] core_rd_data
+ );
//----------------------------------------------------------------
- // Registers and memories including conntrol signals.
+ // Registers and memories including control signals.
//----------------------------------------------------------------
- reg [31 : 0] tmp_api_rd_data0;
- reg [31 : 0] tmp_api_rd_data1;
- reg [31 : 0] muxed_tmp_api_rd_data;
-
- reg [31 : 0] tmp_core_rd_data0;
- reg [31 : 0] tmp_core_rd_data1;
-
reg [31 : 0] mem0 [0 : 8191];
reg [31 : 0] mem0_data;
- reg [12 : 0] mem0_addr;
+ reg [12 : 0] mem0_addr;
reg mem0_we;
reg [31 : 0] mem1 [0 : 8191];
reg [31 : 0] mem1_data;
- reg [12 : 0] mem1_addr;
+ reg [12 : 0] mem1_addr;
reg mem1_we;
//----------------------------------------------------------------
+ // Wires.
+ //----------------------------------------------------------------
+ reg [31 : 0] tmp_api_rd_data0;
+ reg [31 : 0] tmp_api_rd_data1;
+ reg [31 : 0] muxed_tmp_api_rd_data;
+
+ reg [31 : 0] tmp_core_rd_data0;
+ reg [31 : 0] tmp_core_rd_data1;
+
+
+ //----------------------------------------------------------------
// Assignments for ports.
//----------------------------------------------------------------
assign api_rd_data = muxed_tmp_api_rd_data;
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