Hướng dẫn aes-256-gcm encryption php - php mã hóa aes-256-gcm

Question

Tôi đang làm việc với mật mã trong một dự án và tôi cần một chút trợ giúp về cách làm việc openssl_encryptvà openssl_decrypt, tôi chỉ muốn biết cách cơ bản và chính xác nhất để thực hiện nó. Đây là những gì tôi nhận được cho đến nay:

Nội dung chính Show

Description
Return Values
Errors/Exceptions

// To encrypt a string

$dataToEncrypt = 'Hello World';

$cypherMethod = 'AES-256-CBC';
$key = random_bytes(32);
$iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length($cypherMethod));

$encryptedData = openssl_encrypt($dataToEncrypt, $cypherMethod, $key, $options=0, $iv);

Sau đó $cypherMethod, tôi lưu trữ $keyvà $ivđể sử dụng khi giải mã $encryptedData. (Hãy không nói rõ về cách tôi lưu trữ các giá trị, cảm ơn!)

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

Trước hết, đoạn mã ví dụ trên có phải là một ví dụ chính xác về cách sử dụng php openssl_encryptkhông?

Thứ hai, phương pháp của tôi để tạo $keyvà có $ivchính xác và an toàn không? Bởi vì tôi tiếp tục đọc, các khóa phải được bảo mật bằng mật mã.

Cuối cùng,

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

1giá trị không bắt buộc phải có

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

2? Nếu có, thì tại sao nó

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

3chỉ trả về

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

4độ dài? Có nên không

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

5?

17 hữu ích 1 bình luận 34k xem chia sẻ 1 bình luận 34k xem chia sẻ

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

openssl_encrypt — Encrypts data — Encrypts data

Description

openssl_encrypt( string

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

6,    string
// To decrypt an encrypted string $decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);
7,    string
// To decrypt an encrypted string $decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);
8,    int
// To decrypt an encrypted string $decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);
9 = 0,    string $iv = "",    string openssl_encrypt1 = openssl_encrypt2,    string openssl_encrypt3 = "",    int openssl_encrypt4 = 16): string|false(
    string

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

6,
string

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

7,
string

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

8,
int

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

9 = 0,
    string $iv = "",
    string openssl_encrypt1 = openssl_encrypt2,
    string openssl_encrypt3 = "",
    int openssl_encrypt4 = 16
): string|false

Parameters

openssl_encrypt5

The plaintext message data to be encrypted.

openssl_encrypt6

The cipher method. For a list of available cipher methods, use openssl_get_cipher_methods(). openssl_get_cipher_methods().

openssl_encrypt7

The passphrase. If the passphrase is shorter than expected, it is silently padded with openssl_encrypt8 characters; if the passphrase is longer than expected, it is silently truncated.

openssl_encrypt9

openssl_encrypt9 is a bitwise disjunction of the flags openssl_decrypt1 and openssl_decrypt2. openssl_decrypt1 and openssl_decrypt2.

openssl_decrypt3

A non-NULL Initialization Vector.

openssl_decrypt4

The authentication tag passed by reference when using AEAD cipher mode (GCM or CCM).

openssl_decrypt5

Additional authenticated data.

openssl_decrypt6

The length of the authentication openssl_decrypt4. Its value can be between 4 and 16 for GCM mode.

Return Values

Returns the encrypted string on success or openssl_decrypt8 on failure. openssl_decrypt8 on failure.

Errors/Exceptions

Emits an openssl_decrypt9 level error if an unknown cipher algorithm is passed in via the openssl_encrypt6 parameter. openssl_decrypt9 level error if an unknown cipher algorithm is passed in via the openssl_encrypt6 parameter.

Emits an openssl_decrypt9 level error if an empty value is passed in via the openssl_decrypt3 parameter. openssl_decrypt9 level error if an empty value is passed in via the openssl_decrypt3 parameter.

Changelog

Version Description

7.1.0

openssl_encrypt( string

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

6, string

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

7, string

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

8, int

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

9 = 0, string $iv = "", string openssl_encrypt1 = openssl_encrypt2, string openssl_encrypt3 = "", int openssl_encrypt4 = 16): string|false

Parameters

openssl_encrypt5

$cypherMethod6

The plaintext message data to be encrypted.

$cypherMethod7

openssl_encrypt6 ¶

The cipher method. For a list of available cipher methods, use openssl_get_cipher_methods().

$cypherMethod8

$cypherMethod9

$key0

$key1

$key2

$key3

$key4

$key5

$key6

$key7

openssl_encrypt7 ¶

The passphrase. If the passphrase is shorter than expected, it is silently padded with openssl_encrypt8 characters; if the passphrase is longer than expected, it is silently truncated.

$key8

$key9

$iv0

$iv1

$iv2

openssl_encrypt9 ¶

openssl_encrypt9 is a bitwise disjunction of the flags openssl_decrypt1 and openssl_decrypt2.

$iv3

$iv4

$iv5

$iv6

$iv7

$iv8

$iv9

$encryptedData0

$key7

openssl_decrypt3 ¶

A non-NULL Initialization Vector.

$encryptedData2

$encryptedData3

$encryptedData4

openssl_decrypt4 ¶

The authentication tag passed by reference when using AEAD cipher mode (GCM or CCM).

$encryptedData5

$encryptedData6

$encryptedData7

$encryptedData8

$key7

openssl_decrypt5 ¶

Additional authenticated data.

php openssl_encrypt0

php openssl_encrypt1

php openssl_encrypt2

php openssl_encrypt3

php openssl_encrypt4

php openssl_encrypt5

openssl_decrypt6 ¶

The length of the authentication openssl_decrypt4. Its value can be between 4 and 16 for GCM mode.

php openssl_encrypt6

php openssl_encrypt7

$encryptedData3

php openssl_encrypt9

Return Values ¶

openssl_encrypt9 is a bitwise disjunction of the flags openssl_decrypt1 and openssl_decrypt2.

$key0

$key1

$key2

$key3

openssl_decrypt3 ¶

openssl_encrypt9 is a bitwise disjunction of the flags openssl_decrypt1 and openssl_decrypt2.

$key4

$key5

$key6

$key7

$key8

$key7

openssl_decrypt3 ¶

A non-NULL Initialization Vector.

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

00

openssl_decrypt4 ¶

Additional authenticated data.

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

01

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

02

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

03

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

04

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

05

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

06

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

07

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

08

openssl_decrypt6 ¶

The length of the authentication openssl_decrypt4. Its value can be between 4 and 16 for GCM mode.

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

09

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

10

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

11

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

12

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

13

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

14

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

15

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

16

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

17

$key7

Return Values ¶

The length of the authentication openssl_decrypt4. Its value can be between 4 and 16 for GCM mode.

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

19

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

20

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

21

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

22

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

23

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

24

$key7

Return Values ¶

Returns the encrypted string on success or openssl_decrypt8 on failure.

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

26

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

27

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

28

Emits an openssl_decrypt9 level error if an unknown cipher algorithm is passed in via the openssl_encrypt6 parameter.

Emits an openssl_decrypt9 level error if an empty value is passed in via the openssl_decrypt3 parameter. ¶

Changelog

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

30

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

31

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

32

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

33

Version ¶

Additional authenticated data.

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

34

openssl_decrypt6 ¶

Additional authenticated data.

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

35

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

36

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

37

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

38

$key7

openssl_decrypt6 ¶

The length of the authentication openssl_decrypt4. Its value can be between 4 and 16 for GCM mode.

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

40

Return Values ¶

The authentication tag passed by reference when using AEAD cipher mode (GCM or CCM).

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

41

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

42

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

43

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

44

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

45

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

46

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

47

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

48

openssl_decrypt5 ¶

The cipher method. For a list of available cipher methods, use openssl_get_cipher_methods().

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

49

openssl_encrypt7 ¶

The length of the authentication openssl_decrypt4. Its value can be between 4 and 16 for GCM mode.

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

50

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

51

$key7

Return Values ¶

Returns the encrypted string on success or openssl_decrypt8 on failure.

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

53

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

54

Emits an openssl_decrypt9 level error if an unknown cipher algorithm is passed in via the openssl_encrypt6 parameter.

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

32

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

57

Emits an openssl_decrypt9 level error if an empty value is passed in via the openssl_decrypt3 parameter. ¶

A non-NULL Initialization Vector.

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

58

openssl_decrypt4 ¶

The cipher method. For a list of available cipher methods, use openssl_get_cipher_methods().

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

59

// To decrypt an encrypted string

$decryptedData = openssl_decrypt($encryptedData, $cypherMethod, $key, $options=0, $iv);

60

$key7

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Hướng dẫn aes-256-gcm encryption php - php mã hóa aes-256-gcm

Description

Parameters

Return Values

Errors/Exceptions

Changelog

Parameters

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