diff --git a/crypto/sha/asm/sha256-riscv64-zbb.pl b/crypto/sha/asm/sha256-riscv64-zbb.pl
new file mode 100644
index 0000000000..bb4ca56ea7
--- /dev/null
+++ b/crypto/sha/asm/sha256-riscv64-zbb.pl
@@ -0,0 +1,393 @@
+#! /usr/bin/env perl
+# This file is dual-licensed, meaning that you can use it under your
+# choice of either of the following two licenses:
+#
+# Copyright 2025 The OpenSSL Project Authors. All Rights Reserved.
+#
+# Licensed under the Apache License 2.0 (the "License"). You can obtain
+# a copy in the file LICENSE in the source distribution or at
+# https://www.openssl.org/source/license.html
+#
+# or
+#
+# Copyright (c) 2025, Julian Zhu <julian.oerv@isrc.iscas.ac.cn>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. 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.
+#
+# 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
+# OWNER 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.
+
+# The generated code of this file depends on the following RISC-V extensions:
+# - RV64I
+# - RISC-V Basic Bit-manipulation extension ('Zbb')
+
+use strict;
+use warnings;
+
+use FindBin qw($Bin);
+use lib "$Bin";
+use lib "$Bin/../../perlasm";
+use riscv;
+
+# $output is the last argument if it looks like a file (it has an extension)
+# $flavour is the first argument if it doesn't look like a file
+my $output = $#ARGV >= 0 && $ARGV[$#ARGV] =~ m|\.\w+$| ? pop : undef;
+my $flavour = $#ARGV >= 0 && $ARGV[0] !~ m|\.| ? shift : undef;
+
+$output and open STDOUT,">$output";
+
+my $code=<<___;
+.text
+___
+
+my $K256 = "K256";
+
+# Function arguments
+my ($INP, $LEN, $ADDR) = ("a1", "a2", "sp");
+my ($KT, $T1, $T2, $T3, $T4, $T5, $T6) = ("t0", "t1", "t2", "t3", "t4", "t5", "t6");
+my ($A, $B, $C, $D ,$E ,$F ,$G ,$H) = ("s2", "s3", "s4", "s5", "s6", "s7", "s8", "s9");
+
+sub MSGSCHEDULE0 {
+    my (
+        $index,
+    ) = @_;
+    my $code=<<___;
+	lw $T1, (4*$index+0)($INP)
+    @{[rev8 $T1, $T1]} # rev8 $T1, $T1
+    srli $T1, $T1, 32
+    sw $T1, 4*$index($ADDR)
+___
+
+    return $code;
+}
+
+sub MSGSCHEDULE1 {
+    my (
+        $INDEX,
+    ) = @_;
+    my $code=<<___;
+    lw $T1, (($INDEX-2)&0x0f)*4($ADDR)
+    lw $T2, (($INDEX-15)&0x0f)*4($ADDR)
+    lw $T3, (($INDEX-7)&0x0f)*4($ADDR)
+    lw $T4, ($INDEX&0x0f)*4($ADDR)
+    @{[roriw $T5, $T1, 17]}  # roriw $T5, $T1, 17
+    @{[roriw $T6, $T1, 19]}  # roriw $T6, $T1, 19
+    srliw $T1, $T1, 10
+    xor $T1, $T1, $T5
+    xor $T1, $T1, $T6
+    addw $T1, $T1, $T3
+    @{[roriw $T5, $T2, 7]}  # roriw $T5, $T2, 7
+    @{[roriw $T6, $T2, 18]}  # roriw $T6, $T2, 18
+    srliw $T2, $T2, 3
+    xor $T2, $T2, $T5
+    xor $T2, $T2, $T6
+    addw $T1, $T1, $T2
+    addw $T1, $T1, $T4
+    sw $T1, 4*($INDEX&0x0f)($ADDR)
+___
+
+    return $code;
+}
+
+sub sha256_T1 {
+    my (
+        $INDEX, $e, $f, $g, $h,
+    ) = @_;
+    my $code=<<___;
+    lw $T4, 4*$INDEX($KT)
+    addw $h, $h, $T1
+    addw $h, $h, $T4
+    @{[roriw $T2, $e, 6]}  # roriw $T2, $e, 6
+    @{[roriw $T3, $e, 11]}  # roriw $T3, $e, 11
+    @{[roriw $T4, $e, 25]}  # roriw $T4, $e, 25
+    xor $T2, $T2, $T3
+    xor $T1, $f, $g
+    xor $T2, $T2, $T4
+    and $T1, $T1, $e
+    addw $h, $h, $T2
+    xor $T1, $T1, $g
+    addw $T1, $T1, $h
+___
+
+    return $code;
+}
+
+sub sha256_T2 {
+    my (
+        $a, $b, $c,
+    ) = @_;
+    my $code=<<___;
+    # Sigma0
+    @{[roriw $T2, $a, 2]}  # roriw $T2, $a, 2
+    @{[roriw $T3, $a, 13]}  # roriw $T3, $a, 13
+    @{[roriw $T4, $a, 22]}  # roriw $T4, $a, 22
+    xor $T2, $T2, $T3
+    xor $T2, $T2, $T4
+    # Maj
+    xor $T4, $b, $c
+    and $T3, $b, $c
+    and $T4, $T4, $a
+    xor $T4, $T4, $T3
+    # T2
+    addw $T2, $T2, $T4
+___
+
+    return $code;
+}
+
+sub SHA256ROUND {
+    my (
+        $INDEX, $a, $b, $c, $d, $e, $f, $g, $h
+    ) = @_;
+    my $code=<<___;
+    @{[sha256_T1 $INDEX, $e, $f, $g, $h]}
+    @{[sha256_T2 $a, $b, $c]}
+    addw $d, $d, $T1
+    addw $h, $T2, $T1
+___
+
+    return $code;
+}
+
+sub SHA256ROUND0 {
+    my (
+        $INDEX, $a, $b, $c, $d, $e, $f, $g, $h
+    ) = @_;
+    my $code=<<___;
+    @{[MSGSCHEDULE0 $INDEX]}
+    @{[SHA256ROUND $INDEX, $a, $b, $c, $d, $e, $f, $g, $h]}
+___
+
+    return $code;
+}
+
+sub SHA256ROUND1 {
+    my (
+        $INDEX, $a, $b, $c, $d, $e, $f, $g, $h
+    ) = @_;
+    my $code=<<___;
+    @{[MSGSCHEDULE1 $INDEX]}
+    @{[SHA256ROUND $INDEX, $a, $b, $c, $d, $e, $f, $g, $h]}
+___
+
+    return $code;
+}
+
+################################################################################
+# void sha256_block_data_order_zbb(void *c, const void *p, size_t len)
+$code .= <<___;
+.p2align 2
+.globl sha256_block_data_order_zbb
+.type   sha256_block_data_order_zbb,\@function
+sha256_block_data_order_zbb:
+
+    addi sp, sp, -96
+
+    sd s0, 0(sp)
+    sd s1, 8(sp)
+    sd s2, 16(sp)
+    sd s3, 24(sp)
+    sd s4, 32(sp)
+    sd s5, 40(sp)
+    sd s6, 48(sp)
+    sd s7, 56(sp)
+    sd s8, 64(sp)
+    sd s9, 72(sp)
+    sd s10, 80(sp)
+    sd s11, 88(sp)
+
+    addi sp, sp, -64
+
+    la $KT, $K256
+
+    # load ctx
+    lw $A, 0(a0)
+    lw $B, 4(a0)
+    lw $C, 8(a0)
+    lw $D, 12(a0)
+    lw $E, 16(a0)
+    lw $F, 20(a0)
+    lw $G, 24(a0)
+    lw $H, 28(a0)
+
+L_round_loop:
+    # Decrement length by 1
+    addi $LEN, $LEN, -1
+
+    @{[SHA256ROUND0 0, $A, $B, $C, $D, $E, $F, $G, $H]}
+    @{[SHA256ROUND0 1, $H, $A, $B, $C, $D, $E, $F, $G]}
+    @{[SHA256ROUND0 2, $G, $H, $A, $B, $C, $D, $E, $F]}
+    @{[SHA256ROUND0 3, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+    @{[SHA256ROUND0 4, $E, $F, $G, $H, $A, $B, $C, $D]}
+    @{[SHA256ROUND0 5, $D, $E, $F, $G, $H, $A, $B, $C]}
+    @{[SHA256ROUND0 6, $C, $D, $E, $F, $G, $H, $A, $B]}
+    @{[SHA256ROUND0 7, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+    @{[SHA256ROUND0 8, $A, $B, $C, $D, $E, $F, $G, $H]}
+    @{[SHA256ROUND0 9, $H, $A, $B, $C, $D, $E, $F, $G]}
+    @{[SHA256ROUND0 10, $G, $H, $A, $B, $C, $D, $E, $F]}
+    @{[SHA256ROUND0 11, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+    @{[SHA256ROUND0 12, $E, $F, $G, $H, $A, $B, $C, $D]}
+    @{[SHA256ROUND0 13, $D, $E, $F, $G, $H, $A, $B, $C]}
+    @{[SHA256ROUND0 14, $C, $D, $E, $F, $G, $H, $A, $B]}
+    @{[SHA256ROUND0 15, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+    @{[SHA256ROUND1 16, $A, $B, $C, $D, $E, $F, $G, $H]}
+    @{[SHA256ROUND1 17, $H, $A, $B, $C, $D, $E, $F, $G]}
+    @{[SHA256ROUND1 18, $G, $H, $A, $B, $C, $D, $E, $F]}
+    @{[SHA256ROUND1 19, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+    @{[SHA256ROUND1 20, $E, $F, $G, $H, $A, $B, $C, $D]}
+    @{[SHA256ROUND1 21, $D, $E, $F, $G, $H, $A, $B, $C]}
+    @{[SHA256ROUND1 22, $C, $D, $E, $F, $G, $H, $A, $B]}
+    @{[SHA256ROUND1 23, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+    @{[SHA256ROUND1 24, $A, $B, $C, $D, $E, $F, $G, $H]}
+    @{[SHA256ROUND1 25, $H, $A, $B, $C, $D, $E, $F, $G]}
+    @{[SHA256ROUND1 26, $G, $H, $A, $B, $C, $D, $E, $F]}
+    @{[SHA256ROUND1 27, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+    @{[SHA256ROUND1 28, $E, $F, $G, $H, $A, $B, $C, $D]}
+    @{[SHA256ROUND1 29, $D, $E, $F, $G, $H, $A, $B, $C]}
+    @{[SHA256ROUND1 30, $C, $D, $E, $F, $G, $H, $A, $B]}
+    @{[SHA256ROUND1 31, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+    @{[SHA256ROUND1 32, $A, $B, $C, $D, $E, $F, $G, $H]}
+    @{[SHA256ROUND1 33, $H, $A, $B, $C, $D, $E, $F, $G]}
+    @{[SHA256ROUND1 34, $G, $H, $A, $B, $C, $D, $E, $F]}
+    @{[SHA256ROUND1 35, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+    @{[SHA256ROUND1 36, $E, $F, $G, $H, $A, $B, $C, $D]}
+    @{[SHA256ROUND1 37, $D, $E, $F, $G, $H, $A, $B, $C]}
+    @{[SHA256ROUND1 38, $C, $D, $E, $F, $G, $H, $A, $B]}
+    @{[SHA256ROUND1 39, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+    @{[SHA256ROUND1 40, $A, $B, $C, $D, $E, $F, $G, $H]}
+    @{[SHA256ROUND1 41, $H, $A, $B, $C, $D, $E, $F, $G]}
+    @{[SHA256ROUND1 42, $G, $H, $A, $B, $C, $D, $E, $F]}
+    @{[SHA256ROUND1 43, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+    @{[SHA256ROUND1 44, $E, $F, $G, $H, $A, $B, $C, $D]}
+    @{[SHA256ROUND1 45, $D, $E, $F, $G, $H, $A, $B, $C]}
+    @{[SHA256ROUND1 46, $C, $D, $E, $F, $G, $H, $A, $B]}
+    @{[SHA256ROUND1 47, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+    @{[SHA256ROUND1 48, $A, $B, $C, $D, $E, $F, $G, $H]}
+    @{[SHA256ROUND1 49, $H, $A, $B, $C, $D, $E, $F, $G]}
+    @{[SHA256ROUND1 50, $G, $H, $A, $B, $C, $D, $E, $F]}
+    @{[SHA256ROUND1 51, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+    @{[SHA256ROUND1 52, $E, $F, $G, $H, $A, $B, $C, $D]}
+    @{[SHA256ROUND1 53, $D, $E, $F, $G, $H, $A, $B, $C]}
+    @{[SHA256ROUND1 54, $C, $D, $E, $F, $G, $H, $A, $B]}
+    @{[SHA256ROUND1 55, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+    @{[SHA256ROUND1 56, $A, $B, $C, $D, $E, $F, $G, $H]}
+    @{[SHA256ROUND1 57, $H, $A, $B, $C, $D, $E, $F, $G]}
+    @{[SHA256ROUND1 58, $G, $H, $A, $B, $C, $D, $E, $F]}
+    @{[SHA256ROUND1 59, $F, $G, $H, $A, $B, $C, $D, $E]}
+
+    @{[SHA256ROUND1 60, $E, $F, $G, $H, $A, $B, $C, $D]}
+    @{[SHA256ROUND1 61, $D, $E, $F, $G, $H, $A, $B, $C]}
+    @{[SHA256ROUND1 62, $C, $D, $E, $F, $G, $H, $A, $B]}
+    @{[SHA256ROUND1 63, $B, $C, $D, $E, $F, $G, $H, $A]}
+
+    lw $T1, 0(a0)
+    lw $T2, 4(a0)
+    lw $T3, 8(a0)
+    lw $T4, 12(a0)
+
+    addw $A, $A, $T1
+    addw $B, $B, $T2
+    addw $C, $C, $T3
+    addw $D, $D, $T4
+
+    sw $A, 0(a0)
+    sw $B, 4(a0)
+    sw $C, 8(a0)
+    sw $D, 12(a0)
+
+    lw $T1, 16(a0)
+    lw $T2, 20(a0)
+    lw $T3, 24(a0)
+    lw $T4, 28(a0)
+
+    addw $E, $E, $T1
+    addw $F, $F, $T2
+    addw $G, $G, $T3
+    addw $H, $H, $T4
+
+    sw $E, 16(a0)
+    sw $F, 20(a0)
+    sw $G, 24(a0)
+    sw $H, 28(a0)
+
+    addi $INP, $INP, 64
+
+    bnez $LEN, L_round_loop
+
+    addi sp, sp, 64
+
+    ld s0, 0(sp)
+    ld s1, 8(sp)
+    ld s2, 16(sp)
+    ld s3, 24(sp)
+    ld s4, 32(sp)
+    ld s5, 40(sp)
+    ld s6, 48(sp)
+    ld s7, 56(sp)
+    ld s8, 64(sp)
+    ld s9, 72(sp)
+    ld s10, 80(sp)
+    ld s11, 88(sp)
+
+    addi sp, sp, 96
+
+    ret
+.size sha256_block_data_order_zbb,.-sha256_block_data_order_zbb
+
+.section .rodata
+.p2align 3
+.type $K256,\@object
+$K256:
+    .word 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5
+    .word 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5
+    .word 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3
+    .word 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174
+    .word 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc
+    .word 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da
+    .word 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7
+    .word 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967
+    .word 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13
+    .word 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85
+    .word 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3
+    .word 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070
+    .word 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5
+    .word 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3
+    .word 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208
+    .word 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
+.size $K256,.-$K256
+___
+
+print $code;
+
+close STDOUT or die "error closing STDOUT: $!";
diff --git a/crypto/sha/build.info b/crypto/sha/build.info
index 8f69f9cb57..91fb13045a 100644
--- a/crypto/sha/build.info
+++ b/crypto/sha/build.info
@@ -46,7 +46,7 @@ IF[{- !$disabled{asm} -}]
   $SHA1ASM_c64xplus=sha1-c64xplus.s sha256-c64xplus.s sha512-c64xplus.s
   $SHA1DEF_c64xplus=SHA1_ASM SHA256_ASM SHA512_ASM
 
-  $SHA1ASM_riscv64=sha_riscv.c sha256-riscv64-zvkb-zvknha_or_zvknhb.S sha512-riscv64-zbb.S sha512-riscv64-zvkb-zvknhb.S
+  $SHA1ASM_riscv64=sha_riscv.c sha256-riscv64-zbb.S sha256-riscv64-zvkb-zvknha_or_zvknhb.S sha512-riscv64-zbb.S sha512-riscv64-zvkb-zvknhb.S
   $SHA1DEF_riscv64=SHA256_ASM INCLUDE_C_SHA256 SHA512_ASM INCLUDE_C_SHA512
 
   # Now that we have defined all the arch specific variables, use the
@@ -170,6 +170,7 @@ GENERATE[sha1-c64xplus.S]=asm/sha1-c64xplus.pl
 GENERATE[sha256-c64xplus.S]=asm/sha256-c64xplus.pl
 GENERATE[sha512-c64xplus.S]=asm/sha512-c64xplus.pl
 
+GENERATE[sha256-riscv64-zbb.S]=asm/sha256-riscv64-zbb.pl
 GENERATE[sha256-riscv64-zvkb-zvknha_or_zvknhb.S]=asm/sha256-riscv64-zvkb-zvknha_or_zvknhb.pl
 GENERATE[sha512-riscv64-zbb.S]=asm/sha512-riscv64-zbb.pl
 GENERATE[sha512-riscv64-zvkb-zvknhb.S]=asm/sha512-riscv64-zvkb-zvknhb.pl
diff --git a/crypto/sha/sha_riscv.c b/crypto/sha/sha_riscv.c
index ae12af55f9..0f2040170c 100644
--- a/crypto/sha/sha_riscv.c
+++ b/crypto/sha/sha_riscv.c
@@ -16,6 +16,7 @@
 
 void sha256_block_data_order_zvkb_zvknha_or_zvknhb(void *ctx, const void *in,
                                                    size_t num);
+void sha256_block_data_order_zbb(void *ctx, const void *in, size_t num);
 void sha256_block_data_order_c(void *ctx, const void *in, size_t num);
 void sha256_block_data_order(SHA256_CTX *ctx, const void *in, size_t num);
 
@@ -24,6 +25,8 @@ void sha256_block_data_order(SHA256_CTX *ctx, const void *in, size_t num)
     if (RISCV_HAS_ZVKB() && (RISCV_HAS_ZVKNHA() || RISCV_HAS_ZVKNHB()) &&
         riscv_vlen() >= 128) {
         sha256_block_data_order_zvkb_zvknha_or_zvknhb(ctx, in, num);
+    } else if (RISCV_HAS_ZBB()) {
+        sha256_block_data_order_zbb(ctx, in, num);
     } else {
         sha256_block_data_order_c(ctx, in, num);
     }