URL
https://opencores.org/ocsvn/sha_core/sha_core/trunk
Subversion Repositories sha_core
[/] [sha_core/] [trunk/] [rtl/] [sha512.v] - Rev 2
Go to most recent revision | Compare with Previous | Blame | View Log
///////////////////////////////////////////////////////////////////// //// //// //// SHA-512/384 //// //// Secure Hash Algorithm (SHA-512 SHA-384) //// //// //// //// Author: marsgod //// //// marsgod@opencores.org //// //// //// //// //// //// Downloaded from: http://www.opencores.org/cores/sha_core/ //// //// //// ///////////////////////////////////////////////////////////////////// //// //// //// Copyright (C) 2000-2002 marsgod //// //// marsgod@opencores.org //// //// //// //// //// //// This source file may be used and distributed without //// //// restriction provided that this copyright statement is not //// //// removed from the file and that any derivative work contains //// //// the original copyright notice and the associated disclaimer.//// //// //// //// THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY //// //// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED //// //// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS //// //// FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR //// //// 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. //// //// //// ///////////////////////////////////////////////////////////////////// `define SHA512_H0 64'h6a09e667_f3bcc908 `define SHA512_H1 64'hbb67ae85_84caa73b `define SHA512_H2 64'h3c6ef372_fe94f82b `define SHA512_H3 64'ha54ff53a_5f1d36f1 `define SHA512_H4 64'h510e527f_ade682d1 `define SHA512_H5 64'h9b05688c_2b3e6c1f `define SHA512_H6 64'h1f83d9ab_fb41bd6b `define SHA512_H7 64'h5be0cd19_137e2179 `define SHA384_H0 64'hcbbb9d5d_c1059ed8 `define SHA384_H1 64'h629a292a_367cd507 `define SHA384_H2 64'h9159015a_3070dd17 `define SHA384_H3 64'h152fecd8_f70e5939 `define SHA384_H4 64'h67332667_ffc00b31 `define SHA384_H5 64'h8eb44a87_68581511 `define SHA384_H6 64'hdb0c2e0d_64f98fa7 `define SHA384_H7 64'h47b5481d_befa4fa4 `define K00 64'h428a2f98_d728ae22 `define K01 64'h71374491_23ef65cd `define K02 64'hb5c0fbcf_ec4d3b2f `define K03 64'he9b5dba5_8189dbbc `define K04 64'h3956c25b_f348b538 `define K05 64'h59f111f1_b605d019 `define K06 64'h923f82a4_af194f9b `define K07 64'hab1c5ed5_da6d8118 `define K08 64'hd807aa98_a3030242 `define K09 64'h12835b01_45706fbe `define K10 64'h243185be_4ee4b28c `define K11 64'h550c7dc3_d5ffb4e2 `define K12 64'h72be5d74_f27b896f `define K13 64'h80deb1fe_3b1696b1 `define K14 64'h9bdc06a7_25c71235 `define K15 64'hc19bf174_cf692694 `define K16 64'he49b69c1_9ef14ad2 `define K17 64'hefbe4786_384f25e3 `define K18 64'h0fc19dc6_8b8cd5b5 `define K19 64'h240ca1cc_77ac9c65 `define K20 64'h2de92c6f_592b0275 `define K21 64'h4a7484aa_6ea6e483 `define K22 64'h5cb0a9dc_bd41fbd4 `define K23 64'h76f988da_831153b5 `define K24 64'h983e5152_ee66dfab `define K25 64'ha831c66d_2db43210 `define K26 64'hb00327c8_98fb213f `define K27 64'hbf597fc7_beef0ee4 `define K28 64'hc6e00bf3_3da88fc2 `define K29 64'hd5a79147_930aa725 `define K30 64'h06ca6351_e003826f `define K31 64'h14292967_0a0e6e70 `define K32 64'h27b70a85_46d22ffc `define K33 64'h2e1b2138_5c26c926 `define K34 64'h4d2c6dfc_5ac42aed `define K35 64'h53380d13_9d95b3df `define K36 64'h650a7354_8baf63de `define K37 64'h766a0abb_3c77b2a8 `define K38 64'h81c2c92e_47edaee6 `define K39 64'h92722c85_1482353b `define K40 64'ha2bfe8a1_4cf10364 `define K41 64'ha81a664b_bc423001 `define K42 64'hc24b8b70_d0f89791 `define K43 64'hc76c51a3_0654be30 `define K44 64'hd192e819_d6ef5218 `define K45 64'hd6990624_5565a910 `define K46 64'hf40e3585_5771202a `define K47 64'h106aa070_32bbd1b8 `define K48 64'h19a4c116_b8d2d0c8 `define K49 64'h1e376c08_5141ab53 `define K50 64'h2748774c_df8eeb99 `define K51 64'h34b0bcb5_e19b48a8 `define K52 64'h391c0cb3_c5c95a63 `define K53 64'h4ed8aa4a_e3418acb `define K54 64'h5b9cca4f_7763e373 `define K55 64'h682e6ff3_d6b2b8a3 `define K56 64'h748f82ee_5defb2fc `define K57 64'h78a5636f_43172f60 `define K58 64'h84c87814_a1f0ab72 `define K59 64'h8cc70208_1a6439ec `define K60 64'h90befffa_23631e28 `define K61 64'ha4506ceb_de82bde9 `define K62 64'hbef9a3f7_b2c67915 `define K63 64'hc67178f2_e372532b `define K64 64'hca273ece_ea26619c `define K65 64'hd186b8c7_21c0c207 `define K66 64'heada7dd6_cde0eb1e `define K67 64'hf57d4f7f_ee6ed178 `define K68 64'h06f067aa_72176fba `define K69 64'h0a637dc5_a2c898a6 `define K70 64'h113f9804_bef90dae `define K71 64'h1b710b35_131c471b `define K72 64'h28db77f5_23047d84 `define K73 64'h32caab7b_40c72493 `define K74 64'h3c9ebe0a_15c9bebc `define K75 64'h431d67c4_9c100d4c `define K76 64'h4cc5d4be_cb3e42b6 `define K77 64'h597f299c_fc657e2a `define K78 64'h5fcb6fab_3ad6faec `define K79 64'h6c44198c_4a475817 module sha512 (clk_i, rst_i, text_i, text_o, cmd_i, cmd_w_i, cmd_o); input clk_i; // global clock input input rst_i; // global reset input , active high input [31:0] text_i; // text input 32bit output [31:0] text_o; // text output 32bit input [3:0] cmd_i; // command input input cmd_w_i;// command input write enable output [4:0] cmd_o; // command output(status) /* cmd Busy S1 S0 Round W R bit4 bit3 bit2 bit1 bit0 Busy S Round W R Busy: 0 idle 1 busy S: 0 sha-384 1 sha-512 Round: 0 first round 1 internal round W: 0 No-op 1 write data R: 0 No-op 1 read data */ reg [4:0] cmd; wire [4:0] cmd_o; reg [31:0] text_o; reg [6:0] round; wire [6:0] round_plus_1; reg [4:0] read_counter; reg [63:0] H0,H1,H2,H3,H4,H5,H6,H7; reg [63:0] W0,W1,W2,W3,W4,W5,W6,W7,W8,W9,W10,W11,W12,W13,W14; reg [63:0] Wt,Kt; reg [63:0] A,B,C,D,E,F,G,H; reg busy; assign cmd_o = cmd; always @ (posedge clk_i) begin if (rst_i) cmd <= 'b0; else if (cmd_w_i) cmd[3:0] <= cmd_i[3:0]; // busy bit can't write else begin cmd[4] <= busy; // update busy bit if (~busy) cmd[1:0] <= 2'b00; // hardware auto clean R/W bits end end wire [63:0] f1_EFG_64,f2_ABC_64,f3_A_64,f4_E_64,f5_W1_64,f6_W14_64,T1_64,T2_64; wire [63:0] W1_swap,W14_swap,Wt_64_swap; wire [63:0] next_Wt,next_E,next_A; wire [383:0] SHA384_result; wire [511:0] SHA512_result; assign f1_EFG_64 = (E & F) ^ (~E & G); assign f2_ABC_64 = (A & B) ^ (B & C) ^ (A & C); assign f3_A_64 = {A[27:0],A[63:28]} ^ {A[33:0],A[63:34]} ^ {A[38:0],A[63:39]}; assign f4_E_64 = {E[13:0],E[63:14]} ^ {E[17:0],E[63:18]} ^ {E[40:0],E[63:41]}; assign W1_swap = {W1[31:0],W1[63:32]}; assign f5_W1_64 = {W1_swap[0],W1_swap[63:1]} ^ {W1_swap[7:0],W1_swap[63:8]} ^ {7'b000_0000,W1_swap[63:7]}; assign W14_swap = {W14[31:0],W14[63:32]}; assign f6_W14_64 = {W14_swap[18:0],W14_swap[63:19]} ^ {W14_swap[60:0],W14_swap[63:61]} ^ {6'b00_0000,W14_swap[63:6]}; assign Wt_64_swap = f6_W14_64 + {W9[31:0],W9[63:32]} + f5_W1_64 + {W0[31:0],W0[63:32]}; assign T1_64 = H[63:0] + f4_E_64 + f1_EFG_64 + Kt[63:0] + {Wt[31:0],Wt[63:32]}; assign T2_64 = f3_A_64 + f2_ABC_64; assign next_Wt = {Wt_64_swap[31:0],Wt_64_swap[63:32]}; assign next_E = D[63:0] + T1_64; assign next_A = T1_64 + T2_64; assign SHA384_result = {A,B,C,D,E,F}; assign SHA512_result = {A,B,C,D,E,F,G,H}; assign round_plus_1 = round + 1; //------------------------------------------------------------------ // SHA round //------------------------------------------------------------------ always @(posedge clk_i) begin if (rst_i) begin round <= 'd0; busy <= 'b0; W0 <= 'b0; W1 <= 'b0; W2 <= 'b0; W3 <= 'b0; W4 <= 'b0; W5 <= 'b0; W6 <= 'b0; W7 <= 'b0; W8 <= 'b0; W9 <= 'b0; W10 <= 'b0; W11 <= 'b0; W12 <= 'b0; W13 <= 'b0; W14 <= 'b0; Wt <= 'b0; A <= 'b0; B <= 'b0; C <= 'b0; D <= 'b0; E <= 'b0; F <= 'b0; G <= 'b0; H <= 'b0; H0 <= 'b0; H1 <= 'b0; H2 <= 'b0; H3 <= 'b0; H4 <= 'b0; H5 <= 'b0; H6 <= 'b0; H7 <= 'b0; end else begin case (round) 'd0: begin if (cmd[1]) begin W0[31:0] <= text_i; Wt[31:0] <= text_i; busy <= 'b1; round <= round_plus_1; case (cmd[3:2]) 2'b00: // sha-384 first message begin A <= `SHA384_H0; B <= `SHA384_H1; C <= `SHA384_H2; D <= `SHA384_H3; E <= `SHA384_H4; F <= `SHA384_H5; G <= `SHA384_H6; H <= `SHA384_H7; H0 <= `SHA384_H0; H1 <= `SHA384_H1; H2 <= `SHA384_H2; H3 <= `SHA384_H3; H4 <= `SHA384_H4; H5 <= `SHA384_H5; H6 <= `SHA384_H6; H7 <= `SHA384_H7; end 2'b01: // sha-384 internal message begin H0 <= A; H1 <= B; H2 <= C; H3 <= D; H4 <= E; H5 <= F; H6 <= G; H7 <= H; end 2'b10: // sha-512 first message begin A <= `SHA512_H0; B <= `SHA512_H1; C <= `SHA512_H2; D <= `SHA512_H3; E <= `SHA512_H4; F <= `SHA512_H5; G <= `SHA512_H6; H <= `SHA512_H7; H0 <= `SHA512_H0; H1 <= `SHA512_H1; H2 <= `SHA512_H2; H3 <= `SHA512_H3; H4 <= `SHA512_H4; H5 <= `SHA512_H5; H6 <= `SHA512_H6; H7 <= `SHA512_H7; end 2'b11: // sha-512 internal message begin H0 <= A; H1 <= B; H2 <= C; H3 <= D; H4 <= E; H5 <= F; H6 <= G; H7 <= H; end endcase end else begin // IDLE round <= 'd0; end end 'd1: begin W0[63:32] <= text_i; Wt[63:32] <= text_i; round <= round_plus_1; end 'd2: begin W1[31:0] <= text_i; Wt[31:0] <= text_i; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd3: begin W1[63:32] <= text_i; Wt[63:32] <= text_i; round <= round_plus_1; end 'd4: begin W2[31:0] <= text_i; Wt[31:0] <= text_i; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd5: begin W2[63:32] <= text_i; Wt[63:32] <= text_i; round <= round_plus_1; end 'd6: begin W3[31:0] <= text_i; Wt[31:0] <= text_i; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd7: begin W3[63:32] <= text_i; Wt[63:32] <= text_i; round <= round_plus_1; end 'd8: begin W4[31:0] <= text_i; Wt[31:0] <= text_i; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd9: begin W4[63:32] <= text_i; Wt[63:32] <= text_i; round <= round_plus_1; end 'd10: begin W5[31:0] <= text_i; Wt[31:0] <= text_i; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd11: begin W5[63:32] <= text_i; Wt[63:32] <= text_i; round <= round_plus_1; end 'd12: begin W6[31:0] <= text_i; Wt[31:0] <= text_i; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd13: begin W6[63:32] <= text_i; Wt[63:32] <= text_i; round <= round_plus_1; end 'd14: begin W7[31:0] <= text_i; Wt[31:0] <= text_i; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd15: begin W7[63:32] <= text_i; Wt[63:32] <= text_i; round <= round_plus_1; end 'd16: begin W8[31:0] <= text_i; Wt[31:0] <= text_i; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd17: begin W8[63:32] <= text_i; Wt[63:32] <= text_i; round <= round_plus_1; end 'd18: begin W9[31:0] <= text_i; Wt[31:0] <= text_i; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd19: begin W9[63:32] <= text_i; Wt[63:32] <= text_i; round <= round_plus_1; end 'd20: begin W10[31:0] <= text_i; Wt[31:0] <= text_i; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd21: begin W10[63:32] <= text_i; Wt[63:32] <= text_i; round <= round_plus_1; end 'd22: begin W11[31:0] <= text_i; Wt[31:0] <= text_i; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd23: begin W11[63:32] <= text_i; Wt[63:32] <= text_i; round <= round_plus_1; end 'd24: begin W12[31:0] <= text_i; Wt[31:0] <= text_i; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd25: begin W12[63:32] <= text_i; Wt[63:32] <= text_i; round <= round_plus_1; end 'd26: begin W13[31:0] <= text_i; Wt[31:0] <= text_i; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd27: begin W13[63:32] <= text_i; Wt[63:32] <= text_i; round <= round_plus_1; end 'd28: begin W14[31:0] <= text_i; Wt[31:0] <= text_i; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd29: begin W14[63:32] <= text_i; Wt[63:32] <= text_i; round <= round_plus_1; end 'd30: begin Wt[31:0] <= text_i; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd31: begin Wt[63:32] <= text_i; round <= round_plus_1; end 'd32, 'd33, 'd34, 'd35, 'd36, 'd37, 'd38, 'd39, 'd40, 'd41, 'd42, 'd43, 'd44, 'd45, 'd46, 'd47, 'd48, 'd49, 'd50, 'd51, 'd52, 'd53, 'd54, 'd55, 'd56, 'd57, 'd58, 'd59, 'd60, 'd61, 'd62, 'd63, 'd64, 'd65, 'd66, 'd67, 'd68, 'd69, 'd70, 'd71, 'd72, 'd73, 'd74, 'd75, 'd76, 'd77, 'd78, 'd79, 'd80, 'd81, 'd82, 'd83, 'd84, 'd85, 'd86, 'd87, 'd88, 'd89, 'd90, 'd91, 'd92, 'd93, 'd94, 'd95: begin W0 <= W1; W1 <= W2; W2 <= W3; W3 <= W4; W4 <= W5; W5 <= W6; W6 <= W7; W7 <= W8; W8 <= W9; W9 <= W10; W10 <= W11; W11 <= W12; W12 <= W13; W13 <= W14; W14 <= Wt; Wt <= next_Wt; H <= G; G <= F; F <= E; E <= next_E; D <= C; C <= B; B <= A; A <= next_A; round <= round_plus_1; end 'd96: begin A <= next_A + H0; B <= A + H1; C <= B + H2; D <= C + H3; E <= next_E + H4; F <= E + H5; G <= F + H6; H <= G + H7; round <= 'd0; busy <= 'b0; end default: begin round <= 'd0; busy <= 'b0; end endcase end end //------------------------------------------------------------------ // Kt generator //------------------------------------------------------------------ always @ (posedge clk_i) begin if (rst_i) begin Kt <= 'b0; end else begin case (round) 'd00: Kt <= `K00; 'd01: Kt <= `K00; 'd02: Kt <= `K01; 'd03: Kt <= `K01; 'd04: Kt <= `K02; 'd05: Kt <= `K02; 'd06: Kt <= `K03; 'd07: Kt <= `K03; 'd08: Kt <= `K04; 'd09: Kt <= `K04; 'd10: Kt <= `K05; 'd11: Kt <= `K05; 'd12: Kt <= `K06; 'd13: Kt <= `K06; 'd14: Kt <= `K07; 'd15: Kt <= `K07; 'd16: Kt <= `K08; 'd17: Kt <= `K08; 'd18: Kt <= `K09; 'd19: Kt <= `K09; 'd20: Kt <= `K10; 'd21: Kt <= `K10; 'd22: Kt <= `K11; 'd23: Kt <= `K11; 'd24: Kt <= `K12; 'd25: Kt <= `K12; 'd26: Kt <= `K13; 'd27: Kt <= `K13; 'd28: Kt <= `K14; 'd29: Kt <= `K14; 'd30: Kt <= `K15; 'd31: Kt <= `K15; 'd32: Kt <= `K16; 'd33: Kt <= `K17; 'd34: Kt <= `K18; 'd35: Kt <= `K19; 'd36: Kt <= `K20; 'd37: Kt <= `K21; 'd38: Kt <= `K22; 'd39: Kt <= `K23; 'd40: Kt <= `K24; 'd41: Kt <= `K25; 'd42: Kt <= `K26; 'd43: Kt <= `K27; 'd44: Kt <= `K28; 'd45: Kt <= `K29; 'd46: Kt <= `K30; 'd47: Kt <= `K31; 'd48: Kt <= `K32; 'd49: Kt <= `K33; 'd50: Kt <= `K34; 'd51: Kt <= `K35; 'd52: Kt <= `K36; 'd53: Kt <= `K37; 'd54: Kt <= `K38; 'd55: Kt <= `K39; 'd56: Kt <= `K40; 'd57: Kt <= `K41; 'd58: Kt <= `K42; 'd59: Kt <= `K43; 'd60: Kt <= `K44; 'd61: Kt <= `K45; 'd62: Kt <= `K46; 'd63: Kt <= `K47; 'd64: Kt <= `K48; 'd65: Kt <= `K49; 'd66: Kt <= `K50; 'd67: Kt <= `K51; 'd68: Kt <= `K52; 'd69: Kt <= `K53; 'd70: Kt <= `K54; 'd71: Kt <= `K55; 'd72: Kt <= `K56; 'd73: Kt <= `K57; 'd74: Kt <= `K58; 'd75: Kt <= `K59; 'd76: Kt <= `K60; 'd77: Kt <= `K61; 'd78: Kt <= `K62; 'd79: Kt <= `K63; 'd80: Kt <= `K64; 'd81: Kt <= `K65; 'd82: Kt <= `K66; 'd83: Kt <= `K67; 'd84: Kt <= `K68; 'd85: Kt <= `K69; 'd86: Kt <= `K70; 'd87: Kt <= `K71; 'd88: Kt <= `K72; 'd89: Kt <= `K73; 'd90: Kt <= `K74; 'd91: Kt <= `K75; 'd92: Kt <= `K76; 'd93: Kt <= `K77; 'd94: Kt <= `K78; 'd95: Kt <= `K79; default:Kt <= 'd0; endcase end end //------------------------------------------------------------------ // read result //------------------------------------------------------------------ always @ (posedge clk_i) begin if (rst_i) begin text_o <= 'b0; read_counter <= 'b0; end else begin if (cmd[0]) begin case (cmd[3]) 1'b0: read_counter <= 'd11; // sha-384 384/32=12 1'b1: read_counter <= 'd15; // sha-512 512/32=16 endcase end else begin if (~busy) begin case (cmd[3]) 1'b0: begin case (read_counter) 'd11: text_o <= SHA384_result[12*32-1:11*32]; 'd10: text_o <= SHA384_result[11*32-1:10*32]; 'd09: text_o <= SHA384_result[10*32-1:09*32]; 'd08: text_o <= SHA384_result[09*32-1:08*32]; 'd07: text_o <= SHA384_result[08*32-1:07*32]; 'd06: text_o <= SHA384_result[07*32-1:06*32]; 'd05: text_o <= SHA384_result[06*32-1:05*32]; 'd04: text_o <= SHA384_result[05*32-1:04*32]; 'd03: text_o <= SHA384_result[04*32-1:03*32]; 'd02: text_o <= SHA384_result[03*32-1:02*32]; 'd01: text_o <= SHA384_result[02*32-1:01*32]; 'd00: text_o <= SHA384_result[01*32-1:00*32]; default:text_o <= 'b0; endcase end 1'b1: begin case (read_counter) 'd15: text_o <= SHA512_result[16*32-1:15*32]; 'd14: text_o <= SHA512_result[15*32-1:14*32]; 'd13: text_o <= SHA512_result[14*32-1:13*32]; 'd12: text_o <= SHA512_result[13*32-1:12*32]; 'd11: text_o <= SHA512_result[12*32-1:11*32]; 'd10: text_o <= SHA512_result[11*32-1:10*32]; 'd09: text_o <= SHA512_result[10*32-1:09*32]; 'd08: text_o <= SHA512_result[09*32-1:08*32]; 'd07: text_o <= SHA512_result[08*32-1:07*32]; 'd06: text_o <= SHA512_result[07*32-1:06*32]; 'd05: text_o <= SHA512_result[06*32-1:05*32]; 'd04: text_o <= SHA512_result[05*32-1:04*32]; 'd03: text_o <= SHA512_result[04*32-1:03*32]; 'd02: text_o <= SHA512_result[03*32-1:02*32]; 'd01: text_o <= SHA512_result[02*32-1:01*32]; 'd00: text_o <= SHA512_result[01*32-1:00*32]; default:text_o <= 'b0; endcase end endcase if (|read_counter) read_counter <= read_counter - 'd1; end else begin text_o <= 'b0; end end end end endmodule
Go to most recent revision | Compare with Previous | Blame | View Log