DecryptAsymmetric (Function)

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DecryptAsymmetric (Function)

In french: DécrypteAsymétrique

Decrypts a string (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> [, <Fill>]])

<Result>: Character string or Buffer

Result of decryption for the specified message.

<Content to decrypt>: Character string or Buffer

Character string or 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).

<Fill>: Optional Integer constant

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

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