[Cryptech-Commits] [user/js/keywrap] branch integrate_mkmif updated: Adding initial version of mkmif wrapper used by keywrap_core to hide protocol complexity.
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Fri Sep 28 08:25:04 UTC 2018
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joachim at secworks.se pushed a commit to branch integrate_mkmif
in repository user/js/keywrap.
The following commit(s) were added to refs/heads/integrate_mkmif by this push:
new 491a5db Adding initial version of mkmif wrapper used by keywrap_core to hide protocol complexity.
491a5db is described below
commit 491a5db2c4379af748499691f173874aed19de22
Author: Joachim Strömbergson <joachim at secworks.se>
AuthorDate: Fri Sep 28 10:24:53 2018 +0200
Adding initial version of mkmif wrapper used by keywrap_core to hide protocol complexity.
---
src/rtl/keywrap_mkmif.v | 258 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 258 insertions(+)
diff --git a/src/rtl/keywrap_mkmif.v b/src/rtl/keywrap_mkmif.v
new file mode 100644
index 0000000..bb08921
--- /dev/null
+++ b/src/rtl/keywrap_mkmif.v
@@ -0,0 +1,258 @@
+//======================================================================
+//
+// keywrap_mkmif.v
+// ---------------
+// Wrapper for the mkmif_core. This allow us to simplify the
+// integration of the mkmif in keywrap_core.
+//
+//
+// 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_mkmif (
+ input wire clk,
+ input wire reset_n,
+
+ output wire mkm_spi_sclk,
+ output wire mkm_spi_cs_n,
+ input wire mkm_spi_do,
+ output wire mkm_spi_di,
+
+ input wire init,
+ input wire read,
+ input wire write,
+ input wire key_status,
+ output wire ready,
+
+ input wire [31 : 0] wr_status,
+ output wire [31 : 0] rd_status,
+ input wire [255 : 0] wr_key,
+ output wire [255 : 0] rd_key
+ );
+
+
+ //----------------------------------------------------------------
+ // Paramenters and local defines.
+ //----------------------------------------------------------------
+ localparam CTRL_IDLE = 4'h0;
+ localparam CTRL_INIT_WAIT = 4'h1;
+ localparam CTRL_NEXT_WSTART = 4'h2;
+ localparam CTRL_NEXT_USTART = 4'h3;
+ localparam CTRL_NEXT_LOOP0 = 4'h4;
+ localparam CTRL_NEXT_LOOP = 4'h5;
+ localparam CTRL_NEXT_WAIT = 4'h6;
+ localparam CTRL_NEXT_UPDATE = 4'h7;
+ localparam CTRL_NEXT_WCHECK = 4'h8;
+ localparam CTRL_NEXT_UCHECK = 4'h9;
+ localparam CTRL_NEXT_FINALIZE = 4'ha;
+
+ // Addresses for storage in the mkm
+ localparam MKM_STATUS_WORD = 16'h00;
+ localparam MKM_KEY_BASE_WORD = 16'h04;
+
+ localparam DEFAULT_SCLK_DIV = 16'h0020;
+
+
+ //----------------------------------------------------------------
+ // Registers and memories including control signals.
+ //----------------------------------------------------------------
+ reg [31 : 0] key_reg [0 : 7];
+ reg key_we;
+
+ reg [2 : 0] key_word_ctr_reg;
+ reg [2 : 0] key_word_ctr_new;
+ reg key_word_ctr_we;
+ reg key_word_ctr_rst;
+ reg key_word_ctr_inc;
+
+ reg [31 : 0] status_reg;
+ reg [31 : 0] status_new;
+ reg status_we;
+
+ reg ready_reg;
+ reg ready_new;
+ reg ready_we;
+
+ reg [3 : 0] keywrap_mkmif_ctrl_reg;
+ reg [3 : 0] keywrap_mkmif_ctrl_new;
+ reg keywrap_mkmif_ctrl_we;
+
+
+ //----------------------------------------------------------------
+ // Wires.
+ //----------------------------------------------------------------
+ reg mkm_init_op;
+ reg mkm_read_op;
+ reg mkm_write_op;
+ wire mkm_ready;
+ wire mkm_valid;
+ reg [15 : 0] mkm_sclk_div;
+ reg [15 : 0] mkm_addr;
+ reg [31 : 0] mkm_write_data;
+ wire [31 : 0] mkm_read_data;
+
+
+ //----------------------------------------------------------------
+ // Instantiations.
+ //----------------------------------------------------------------
+ mkmif_core mkm(
+ .clk(clk),
+ .reset_n(reset_n),
+
+ .spi_sclk(mkm_spi_sclk),
+ .spi_cs_n(mkm_spi_cs_n),
+ .spi_do(mkm_spi_do),
+ .spi_di(mkm_spi_di),
+
+ .init_op(mkm_init_op),
+ .read_op(mkm_read_op),
+ .write_op(mkm_write_op),
+
+ .ready(mkm_ready),
+ .valid(mkm_valid),
+
+ .sclk_div(mkm_sclk_div),
+ .addr(mkm_addr),
+ .write_data(mkm_write_data),
+ .read_data(mkm_read_data)
+ );
+
+
+ //----------------------------------------------------------------
+ // Assignments for ports.
+ //----------------------------------------------------------------
+
+
+ //----------------------------------------------------------------
+ // reg_update
+ //----------------------------------------------------------------
+ always @ (posedge clk or negedge reset_n)
+ begin: reg_update
+ integer i;
+
+ if (!reset_n)
+ begin
+ for (i = 0 ; i < 8 ; i = i + 1)
+ key[i] <= 32'h0;
+
+ ready_reg <= 1'h1;
+ status_reg <= 32'h0;
+ key_word_ctr_reg <= 3'h0;
+ keywrap_mkmif_ctrl_reg <= CTRL_IDLE;
+ end
+
+ else
+ begin
+ if (ready_we)
+ ready_reg <= ready_new;
+
+ if (key_we)
+ key_reg[key_word_ctr_reg] <= mkm_read_data;
+
+ if (status_we)
+ status_reg <= mkm_read_data;
+
+ if (key_word_ctr_we)
+ key_word_ctr_reg <= key_word_ctr_new;
+
+ if (keywrap_mkmif_ctrl_we)
+ keywrap_mkmif_ctrl_reg <= keywrap_mkmif_ctrl_new;
+ end
+ end // reg_update
+
+
+ //----------------------------------------------------------------
+ // key_word_ctr
+ //----------------------------------------------------------------
+ always @*
+ begin : key_word_ctr
+ key_word_ctr_new = 3'h0;
+ key_word_ctr_we = 1'h0;
+
+ if (key_word_ctr_rst)
+ begin
+ iteration_ctr_new = 3'h0;
+ iteration_ctr_we = 1'h1;
+ end
+
+ if (key_word_ctr_inc)
+ begin
+ key_word_ctr_new = key_word_ctr_reg + 1'h1;
+ key_word_ctr_we = 1'h1;
+ end
+
+ end
+
+
+ //----------------------------------------------------------------
+ // keywrap_mkmif_ctrl
+ //----------------------------------------------------------------
+ always @*
+ begin : keywrap_mkmif_ctrl
+ ready_new = 1'h0;
+ ready_we = 1'h0;
+ key_we = 1'h0;
+ key_word_ctr_rst = 1'h0;
+ key_word_ctr_inc = 1'h0;
+ status_we = 1'h0;
+ mkm_init_op = 1'h0;
+ mkm_read_op = 1'h0;
+ mkm_write_op = 1'h0;
+ mkm_sclk_div = DEFAULT_SCLK_DIV;
+ mkm_addr = 16'h0;
+ mkm_write_data = 32'h0;
+
+ keywrap_mkmif_ctrl_new = CTRL_IDLE;
+ keywrap_mkmif_ctrl_we = 1'h0;
+
+ case (keywrap_mkmif_ctrl_reg)
+ CTRL_IDLE:
+ begin
+ if (init)
+ begin
+ ready_new = 1'h0;
+ ready_we = 1'h1;
+ end
+ end
+
+ default:
+ begin
+
+ end
+ endcase // case (keywrap_mkmif_ctrl_reg)
+ end // keywrap_mkmif_ctrl
+
+endmodule // keywrap_mkmif
+
+//======================================================================
+// EOF keywrap_mkmif.v
+//======================================================================
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