如何通过OpenSSL在Linux上实现文件完整性校验

# 在Debian/Ubuntu上
sudo apt-get update
sudo apt-get install openssl

# 在CentOS/RHEL上
sudo yum install openssl

# 在Fedora上
sudo dnf install openssl

openssl dgst -sha256 /path/to/your/file

SHA256(./yourfile) = 3a5f8c1d9e4b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d

3a5f8c1d9e4b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d

echo "3a5f8c1d9e4b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d" | diff - /dev/stdin

#!/bin/bash

# 检查参数数量
if [ "<span>$#"</span> -ne 2 ]; then
    echo "Usage: <span>$0 <file> <expected_hash>"</span>
    exit 1
fi

file=$1
expected_hash=$2

# 生成文件的SHA-256哈希值
actual_hash=$(openssl dgst -sha256 "<span>$file"</span> | awk '{print $2}')

# 比较哈希值
if [ "<span>$actual_hash"</span> == "<span>$expected_hash"</span> ]; then
    echo "File integrity verified: Hash matches."
else
    echo "File integrity check failed: Hash does not match."
    echo "Expected hash: <span>$expected_hash"</span>
    echo "Actual hash: <span>$actual_hash"</span>
fi

chmod +x check_integrity.sh

./check_integrity.sh /path/to/your/file 3a5f8c1d9e4b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d