DecryptAsymmetric (Function)

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DecryptAsymmetric (Function)

In french: DécrypteAsymétrique

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

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

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

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:
cryptPaddingOAEP Padding according to the OAEP algorithm (Optimal Asymmetric Encryption Padding).
cryptPaddingPKCS1
(Default value) Padding according to the PKCS 1 algorithm (Public Key Cryptographic Standards).

Related Examples:

Unit examples (WINDEV): Asymmetric encryption

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

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