openssl enc用来加密(Encryption)、解密(decryption)和编码(encoding)
help
$ openssl help enc
Usage: enc [options]
General options:
-help Display this summary
-list List ciphers
-ciphers Alias for -list
-e Encrypt
-d Decrypt
-p Print the iv/key
-P Print the iv/key and exit
-engine val Use engine, possibly a hardware device
Input options:
-in infile Input file
-k val Passphrase
-kfile infile Read passphrase from file
Output options:
-out outfile Output file
-pass val Passphrase source
-v Verbose output
-a Base64 encode/decode, depending on encryption flag
-base64 Same as option -a
-A Used with -[base64|a] to specify base64 buffer as a single line
Encryption options:
-nopad Disable standard block padding
-salt Use salt in the KDF (default)
-nosalt Do not use salt in the KDF
-debug Print debug info
-bufsize val Buffer size
-K val Raw key, in hex
-S val Salt, in hex
-iv val IV in hex
-md val Use specified digest to create a key from the passphrase
-iter +int Specify the iteration count and force the use of PBKDF2
Default: 10000
-pbkdf2 Use password-based key derivation function 2 (PBKDF2)
Use -iter to change the iteration count from 10000
-none Don't encrypt
-* Any supported cipher
Random state options:
-rand val Load the given file(s) into the random number generator
-writerand outfile Write random data to the specified file
Provider options:
-provider-path val Provider load path (must be before 'provider' argument if required)
-provider val Provider to load (can be specified multiple times)
-propquery val Property query used when fetching algorithms
$ openssl enc --list
Supported ciphers:
-aes-128-cbc -aes-128-cfb -aes-128-cfb1
-aes-128-cfb8 -aes-128-ctr -aes-128-ecb
-aes-128-ofb -aes-192-cbc -aes-192-cfb
-aes-192-cfb1 -aes-192-cfb8 -aes-192-ctr
-aes-192-ecb -aes-192-ofb -aes-256-cbc
-aes-256-cfb -aes-256-cfb1 -aes-256-cfb8
-aes-256-ctr -aes-256-ecb -aes-256-ofb
-aes128 -aes128-wrap -aes192
-aes192-wrap -aes256 -aes256-wrap
-aria-128-cbc -aria-128-cfb -aria-128-cfb1
-aria-128-cfb8 -aria-128-ctr -aria-128-ecb
-aria-128-ofb -aria-192-cbc -aria-192-cfb
-aria-192-cfb1 -aria-192-cfb8 -aria-192-ctr
-aria-192-ecb -aria-192-ofb -aria-256-cbc
-aria-256-cfb -aria-256-cfb1 -aria-256-cfb8
-aria-256-ctr -aria-256-ecb -aria-256-ofb
-aria128 -aria192 -aria256
-bf -bf-cbc -bf-cfb
-bf-ecb -bf-ofb -blowfish
-camellia-128-cbc -camellia-128-cfb -camellia-128-cfb1
-camellia-128-cfb8 -camellia-128-ctr -camellia-128-ecb
-camellia-128-ofb -camellia-192-cbc -camellia-192-cfb
-camellia-192-cfb1 -camellia-192-cfb8 -camellia-192-ctr
-camellia-192-ecb -camellia-192-ofb -camellia-256-cbc
-camellia-256-cfb -camellia-256-cfb1 -camellia-256-cfb8
-camellia-256-ctr -camellia-256-ecb -camellia-256-ofb
-camellia128 -camellia192 -camellia256
-cast -cast-cbc -cast5-cbc
-cast5-cfb -cast5-ecb -cast5-ofb
-chacha20 -des -des-cbc
-des-cfb -des-cfb1 -des-cfb8
-des-ecb -des-ede -des-ede-cbc
-des-ede-cfb -des-ede-ecb -des-ede-ofb
-des-ede3 -des-ede3-cbc -des-ede3-cfb
-des-ede3-cfb1 -des-ede3-cfb8 -des-ede3-ecb
-des-ede3-ofb -des-ofb -des3
-des3-wrap -desx -desx-cbc
-id-aes128-wrap -id-aes128-wrap-pad -id-aes192-wrap
-id-aes192-wrap-pad -id-aes256-wrap -id-aes256-wrap-pad
-id-smime-alg-CMS3DESwrap -rc2 -rc2-128
-rc2-40 -rc2-40-cbc -rc2-64
-rc2-64-cbc -rc2-cbc -rc2-cfb
-rc2-ecb -rc2-ofb -rc4
-rc4-40 -seed -seed-cbc
-seed-cfb -seed-ecb -seed-ofb
-sm4 -sm4-cbc -sm4-cfb
-sm4-ctr -sm4-ecb -sm4-ofb
-salt Use salt in the KDF (default)
示例
加密文件
openssl enc -aes-256-cbc -in <in-file> -out <ciphertext-file>
说明
-aes-256-cbc AES（高级加密标准）256位的 CBC（密码块链接）模式加密文件-in <in-file> 要加密的文件-out <out-file> 输出的文件，一般为 .bin 文件- 加密过程需要输入
密码，该方法不太安全，推荐使用方法
openssl enc -aes-256-cbc -salt -pbkdf2 -iter 10000 -in <in-file> -out <ciphertext-file>
-salt 为每个加密过程生成一个随机的 salt-pbkdf2 和 -iter 10000 选项让 OpenSSL 使用 PBKDF2 密钥派生函数，并且进行 10000 次迭代，更安全，且不易破解
解密文件
openssl enc -aes-256-cbc -d -pbkdf2 -iter 10000 -in <ciphertext-file> -out <out-file>
说明：