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authorJoachim StroĢˆmbergson <joachim@assured.se>2020-05-12 14:11:26 +0200
committerJoachim StroĢˆmbergson <joachim@assured.se>2020-05-12 14:11:26 +0200
commita4085c16e207ebfda27e4589b3a7641b0b6ea627 (patch)
tree5e73ffea160fbcac3473d75dae94a064a7aea54a /src/rtl/sha1.v
parentcf6e31e92bedcdd576fd9b08ddeb910e8a62ce00 (diff)
Adding the functionality to extractd and set the intrnal hash state. Note: The functionality has not yet been debugged. Need to add test case.HEADmaster
Diffstat (limited to 'src/rtl/sha1.v')
-rw-r--r--src/rtl/sha1.v39
1 files changed, 38 insertions, 1 deletions
diff --git a/src/rtl/sha1.v b/src/rtl/sha1.v
index 16b565e..4e57a29 100644
--- a/src/rtl/sha1.v
+++ b/src/rtl/sha1.v
@@ -64,6 +64,7 @@ module sha1(
localparam ADDR_CTRL = 8'h08;
localparam CTRL_INIT_BIT = 0;
localparam CTRL_NEXT_BIT = 1;
+ localparam CTRL_SET_BIT = 2;
localparam ADDR_STATUS = 8'h09;
localparam STATUS_READY_BIT = 0;
@@ -75,9 +76,12 @@ module sha1(
localparam ADDR_DIGEST0 = 8'h20;
localparam ADDR_DIGEST4 = 8'h24;
+ localparam ADDR_STATE0 = 8'h30;
+ localparam ADDR_STATE4 = 8'h34;
+
localparam CORE_NAME0 = 32'h73686131; // "sha1"
localparam CORE_NAME1 = 32'h20202020; // " "
- localparam CORE_VERSION = 32'h302e3630; // "0.60"
+ localparam CORE_VERSION = 32'h302e3730; // "0.70"
//----------------------------------------------------------------
@@ -89,11 +93,17 @@ module sha1(
reg next_reg;
reg next_new;
+ reg set_reg;
+ reg set_new;
+
reg ready_reg;
reg [31 : 0] block_reg [0 : 15];
reg block_we;
+ reg [31 : 0] state_reg [0 : 4];
+ reg state_we;
+
reg [159 : 0] digest_reg;
reg digest_valid_reg;
@@ -105,6 +115,8 @@ module sha1(
wire core_ready;
wire [511 : 0] core_block;
wire [159 : 0] core_digest;
+ wire [159 : 0] core_state_in;
+ wire [159 : 0] core_state_out;
wire core_digest_valid;
reg [31 : 0] tmp_read_data;
@@ -114,6 +126,9 @@ module sha1(
//----------------------------------------------------------------
// Concurrent connectivity for ports etc.
//----------------------------------------------------------------
+ assign core_state_in = {state_reg[4], state_reg[3], state_reg[2],
+ state_reg[1],state_reg[0]};
+
assign core_block = {block_reg[00], block_reg[01], block_reg[02], block_reg[03],
block_reg[04], block_reg[05], block_reg[06], block_reg[07],
block_reg[08], block_reg[09], block_reg[10], block_reg[11],
@@ -132,9 +147,13 @@ module sha1(
.init(init_reg),
.next(next_reg),
+ .set(set_reg),
.block(core_block),
+ .state_in(core_state_in),
+ .state_out(core_state_out),
+
.ready(core_ready),
.digest(core_digest),
@@ -156,12 +175,16 @@ module sha1(
begin
init_reg <= 1'h0;
next_reg <= 1'h0;
+ set_reg <= 1'h0;
ready_reg <= 1'h0;
digest_reg <= 160'h0;
digest_valid_reg <= 1'h0;
for (i = 0 ; i < 16 ; i = i + 1)
block_reg[i] <= 32'h0;
+
+ for (i = 0 ; i < 5 ; i = i + 1)
+ state_reg[i] <= 32'h0;
end
else
begin
@@ -169,6 +192,10 @@ module sha1(
digest_valid_reg <= core_digest_valid;
init_reg <= init_new;
next_reg <= next_new;
+ set_reg <= set_new;
+
+ if (state_we)
+ state_reg[address[2 : 0]] <= write_data;
if (block_we)
block_reg[address[3 : 0]] <= write_data;
@@ -187,7 +214,9 @@ module sha1(
begin : api
init_new = 0;
next_new = 0;
+ set_new = 1'h0;
block_we = 0;
+ state_we = 0;
tmp_read_data = 32'h0;
tmp_error = 0;
@@ -200,10 +229,14 @@ module sha1(
if ((address >= ADDR_BLOCK0) && (address <= ADDR_BLOCK15))
block_we = 1;
+ if ((address >= ADDR_STATE0) && (address <= ADDR_STATE4))
+ state_we = 1;
+
if (address == ADDR_CTRL)
begin
init_new = write_data[CTRL_INIT_BIT];
next_new = write_data[CTRL_NEXT_BIT];
+ set_new = write_data[CTRL_SET_BIT];
end
end
end // if (write_read)
@@ -212,6 +245,10 @@ module sha1(
if ((address >= ADDR_BLOCK0) && (address <= ADDR_BLOCK15))
tmp_read_data = block_reg[address[3 : 0]];
+ if ((address >= ADDR_STATE0) && (address <= ADDR_STATE4))
+ if (core_ready)
+ tmp_read_data = core_state_out[(4 - (address - ADDR_STATE0)) * 32 +: 32];
+
if ((address >= ADDR_DIGEST0) && (address <= ADDR_DIGEST4))
if (core_ready)
tmp_read_data = digest_reg[(4 - (address - ADDR_DIGEST0)) * 32 +: 32];