diff options
Diffstat (limited to 'src/rtl')
| -rw-r--r-- | src/rtl/sha256.v | 23 | ||||
| -rw-r--r-- | src/rtl/sha256_core.v | 101 |
2 files changed, 89 insertions, 35 deletions
diff --git a/src/rtl/sha256.v b/src/rtl/sha256.v index 1f9e75e..17fcd84 100644 --- a/src/rtl/sha256.v +++ b/src/rtl/sha256.v @@ -64,6 +64,7 @@ module sha256( localparam ADDR_CTRL = 8'h08; localparam CTRL_INIT_BIT = 0; localparam CTRL_NEXT_BIT = 1; + localparam CTRL_MODE_BIT = 2; localparam ADDR_STATUS = 8'h09; localparam STATUS_READY_BIT = 0; @@ -97,7 +98,10 @@ module sha256( localparam CORE_NAME0 = 32'h73686132; // "sha2" localparam CORE_NAME1 = 32'h2d323536; // "-256" - localparam CORE_VERSION = 32'h302e3831; // "0.81" + localparam CORE_VERSION = 32'h312e3830; // "1.80" + + localparam MODE_SHA_224 = 1'h0; + localparam MODE_SHA_256 = 1'h1; //---------------------------------------------------------------- @@ -113,6 +117,10 @@ module sha256( reg next_we; reg next_set; + reg mode_reg; + reg mode_new; + reg mode_we; + reg ready_reg; reg [31 : 0] block0_reg; @@ -201,6 +209,7 @@ module sha256( .init(core_init), .next(core_next), + .mode(mode_reg), .block(core_block), @@ -235,6 +244,7 @@ module sha256( begin init_reg <= 0; next_reg <= 0; + mode_reg <= MODE_SHA_256; ready_reg <= 0; digest_reg <= 256'h0; digest_valid_reg <= 0; @@ -270,6 +280,9 @@ module sha256( next_reg <= next_new; end + if (mode_we) + mode_reg <= mode_new; + if (core_digest_valid) begin digest_reg <= core_digest; @@ -405,6 +418,8 @@ module sha256( begin : api_logic init_set = 0; next_set = 0; + mode_new = 0; + mode_we = 0; block0_we = 0; block1_we = 0; block2_we = 0; @@ -443,6 +458,8 @@ module sha256( begin init_set = write_data[CTRL_INIT_BIT]; next_set = write_data[CTRL_NEXT_BIT]; + mode_new = write_data[CTRL_MODE_BIT]; + mode_we = 1; end ADDR_BLOCK0: @@ -538,10 +555,10 @@ module sha256( tmp_read_data = CORE_VERSION; ADDR_CTRL: - tmp_read_data = {28'h0000000, 2'b00, next_reg, init_reg}; + tmp_read_data = {29'h0, mode_reg, next_reg, init_reg}; ADDR_STATUS: - tmp_read_data = {28'h0000000, 2'b00, digest_valid_reg, ready_reg}; + tmp_read_data = {30'h0, digest_valid_reg, ready_reg}; ADDR_BLOCK0: tmp_read_data = block0_reg; diff --git a/src/rtl/sha256_core.v b/src/rtl/sha256_core.v index 448dfe6..6553aab 100644 --- a/src/rtl/sha256_core.v +++ b/src/rtl/sha256_core.v @@ -44,6 +44,7 @@ module sha256_core( input wire init, input wire next, + input wire mode, input wire [511 : 0] block, @@ -68,20 +69,29 @@ module sha256_core( //---------------------------------------------------------------- // Internal constant and parameter definitions. //---------------------------------------------------------------- - parameter H0_0 = 32'h6a09e667; - parameter H0_1 = 32'hbb67ae85; - parameter H0_2 = 32'h3c6ef372; - parameter H0_3 = 32'ha54ff53a; - parameter H0_4 = 32'h510e527f; - parameter H0_5 = 32'h9b05688c; - parameter H0_6 = 32'h1f83d9ab; - parameter H0_7 = 32'h5be0cd19; - - parameter SHA256_ROUNDS = 63; - - parameter CTRL_IDLE = 0; - parameter CTRL_ROUNDS = 1; - parameter CTRL_DONE = 2; + localparam SHA224_H0_0 = 32'hc1059ed8; + localparam SHA224_H0_1 = 32'h367cd507; + localparam SHA224_H0_2 = 32'h3070dd17; + localparam SHA224_H0_3 = 32'hf70e5939; + localparam SHA224_H0_4 = 32'hffc00b31; + localparam SHA224_H0_5 = 32'h68581511; + localparam SHA224_H0_6 = 32'h64f98fa7; + localparam SHA224_H0_7 = 32'hbefa4fa4; + + localparam SHA256_H0_0 = 32'h6a09e667; + localparam SHA256_H0_1 = 32'hbb67ae85; + localparam SHA256_H0_2 = 32'h3c6ef372; + localparam SHA256_H0_3 = 32'ha54ff53a; + localparam SHA256_H0_4 = 32'h510e527f; + localparam SHA256_H0_5 = 32'h9b05688c; + localparam SHA256_H0_6 = 32'h1f83d9ab; + localparam SHA256_H0_7 = 32'h5be0cd19; + + localparam SHA256_ROUNDS = 63; + + localparam CTRL_IDLE = 0; + localparam CTRL_ROUNDS = 1; + localparam CTRL_DONE = 2; //---------------------------------------------------------------- @@ -311,15 +321,29 @@ module sha256_core( if (digest_init) begin - H0_new = H0_0; - H1_new = H0_1; - H2_new = H0_2; - H3_new = H0_3; - H4_new = H0_4; - H5_new = H0_5; - H6_new = H0_6; - H7_new = H0_7; H_we = 1; + if (mode) + begin + H0_new = SHA256_H0_0; + H1_new = SHA256_H0_1; + H2_new = SHA256_H0_2; + H3_new = SHA256_H0_3; + H4_new = SHA256_H0_4; + H5_new = SHA256_H0_5; + H6_new = SHA256_H0_6; + H7_new = SHA256_H0_7; + end + else + begin + H0_new = SHA224_H0_0; + H1_new = SHA224_H0_1; + H2_new = SHA224_H0_2; + H3_new = SHA224_H0_3; + H4_new = SHA224_H0_4; + H5_new = SHA224_H0_5; + H6_new = SHA224_H0_6; + H7_new = SHA224_H0_7; + end end if (digest_update) @@ -397,17 +421,31 @@ module sha256_core( if (state_init) begin + a_h_we = 1; if (first_block) begin - a_new = H0_0; - b_new = H0_1; - c_new = H0_2; - d_new = H0_3; - e_new = H0_4; - f_new = H0_5; - g_new = H0_6; - h_new = H0_7; - a_h_we = 1; + if (mode) + begin + a_new = SHA256_H0_0; + b_new = SHA256_H0_1; + c_new = SHA256_H0_2; + d_new = SHA256_H0_3; + e_new = SHA256_H0_4; + f_new = SHA256_H0_5; + g_new = SHA256_H0_6; + h_new = SHA256_H0_7; + end + else + begin + a_new = SHA224_H0_0; + b_new = SHA224_H0_1; + c_new = SHA224_H0_2; + d_new = SHA224_H0_3; + e_new = SHA224_H0_4; + f_new = SHA224_H0_5; + g_new = SHA224_H0_6; + h_new = SHA224_H0_7; + end end else begin @@ -419,7 +457,6 @@ module sha256_core( f_new = H5_reg; g_new = H6_reg; h_new = H7_reg; - a_h_we = 1; end end |