DecryptAsymmetric (Function)

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DecryptAsymmetric (Function)

In french: DécrypteAsymétrique

Decrypts a buffer with a private/public key algorithm with RSA encryption. This message has been previously encrypted with EncryptAsymmetric.

Versions 25 and later

This function is now available in Android Widget mode.

This function is now available for Android applications.

New in version 25

This function is now available in Android Widget mode.

This function is now available for Android applications.

This function is now available in Android Widget mode.

This function is now available for Android applications.

Example

// Encrypting a character string
//---------------------------------------
bufToEncrypt is Buffer = "Message to encrypt"
bufEncryptedMessage is Buffer
sPublicKeyFile is string = fExeDir() + "\PublicKey.pem"
sPublicKeyPassword is string = "xxx"

bufEncryptedMessage = EncryptAsymmetric(bufToEncrypt, sPublicKeyFile, ...
sPublicKeyPassword, cryptPaddingPKCS1)

// Decryption
// -------------
bufEncryptedMessage is Buffer
bufDecryptedMessage is Buffer
sPrivateKeyFile is string = fExeDir() + "\PrivateKey.pem"
sPrivateKeyPassword is string = "xxx"

bufDecryptedMessage = DecryptAsymmetric(bufEncryptedMessage, sPrivateKeyFile, ...
sPrivateKeyPassword, cryptPaddingPKCS1)

Syntax

<Result> = DecryptAsymmetric(<Content to decrypt> , <Private key file> [, <Password> [, <Padding>]])

<Result>: Buffer

Result of decryption for the specified message.

<Content to decrypt>: Buffer

Buffer to decrypt.

<Private key file>: Character string (with quotes)

Name and path of the file corresponding to the RSA private key to use for decryption. pem and p12 key formats are supported.

<Password>: Optional character string (with quotes)

Key file password (if required).

<Padding>: Optional Integer constant

Padding mode for encrypted data (used during encryption) to be compatible with the size required by block encryption algorithms:
cryptPaddingPKCS1
(Default value) Padding according to the PKCS 1 algorithm (Public Key Cryptographic Standards).
cryptPaddingOAEP Padding according to the OAEP algorithm (Optimal Asymmetric Encryption Padding).

Related Examples:

Unit examples (WINDEV): Asymmetric encryption

[ + ] Using the asymmetric encryption functions (EncryptAsymmetric, DecryptAsymmetric)

Component: wd260com.dll