Entity: hmac_core

• File: hmac_core.sv

Diagram

Description

Ports

Port name	Direction	Type	Description
clk_i	input
rst_ni	input
secret_key	input	[255:0]	{word0, word1, …, word7}
wipe_secret	input
wipe_v	input	[31:0]
hmac_en	input
reg_hash_start	input
reg_hash_process	input
hash_done	output
sha_hash_start	output
sha_hash_process	output
sha_hash_done	input
sha_rvalid	output		fifo
sha_rdata	output	sha_fifo_t
sha_rready	input
fifo_rvalid	input
fifo_rdata	input	sha_fifo_t
fifo_rready	output
fifo_wsel	output		0: from reg, 1: from digest
fifo_wvalid	output
fifo_wdata_sel	output	[2:0]	0: digest[0] .. 7: digest[7]
fifo_wready	input
message_length	input	[63:0]
sha_message_length	output	[63:0]
idle	output

Signals

Name	Type	Description
hash_start	logic	generated from internal state machine
hash_process	logic	generated from internal state machine to trigger hash
hmac_hash_done	logic
i_pad	logic [BlockSize-1:0]
o_pad	logic [BlockSize-1:0]
txcount	logic [63:0]
pad_index	logic [BlockSizeBits-HashWordBits-1:0]
clr_txcount	logic
inc_txcount	logic
hmac_sha_rvalid	logic
sel_rdata	sel_rdata_t
sel_msglen	sel_msglen_t
update_round	logic
round_q	round_t
round_d	round_t
st_q	st_e
st_d	st_e
clr_fifo_wdata_sel	logic
txcnt_eq_blksz	logic
reg_hash_process_flag	logic

Constants

Name	Type	Value	Description
BlockSize	int unsigned	512
BlockSizeBits	int unsigned	$clog2(BlockSize)
HashWordBits	int unsigned	$clog2($bits(sha_word_t)
BlockSize64	bit [63:0]	undefined
BlockSizeBSB	bit [BlockSizeBits:0]	BlockSize[BlockSizeBits:0]

Types

Name	Type	Description
sel_rdata_t	enum logic [1:0] { SelIPad, SelOPad, SelFifo }
sel_msglen_t	enum logic { SelIPadMsg, SelOPadMsg }
round_t	enum logic { Inner, Outer }
st_e	enum logic [2:0] { StIdle, StIPad, StMsg, StPushToMsgFifo, StWaitResp, StOPad, StDone }

Processes

• unnamed: ( @(posedge clk_i or negedge rst_ni) )

• unnamed: ( @(posedge clk_i or negedge rst_ni) )

• unnamed: ( @(posedge clk_i or negedge rst_ni) )

• unnamed: ( @(posedge clk_i or negedge rst_ni) )

• state_ff: ( @(posedge clk_i or negedge rst_ni) )

• next_state: ( )