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Help / WLanguage / WLanguage functions / Standard functions / Encryption/compression functions
  • Asymmetric encryption of an envelope
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Stored procedures
Warning
From version 28, EncryptAsymmetricEnvelopped is kept for backward compatibility. This function has been replaced with EncryptAsymmetricEnveloped.
Performs an asymmetric encryption of an envelope.
Example
// Cryptage d'une chaîne de caractères
//---------------------------------------
bufACrypter is Buffer = "Message à crypter"
bufMessageCrypté is Buffer
sFichierCléPublique is string = fExeDir() + "\ClePublique.pem"
sMotDePasseCléPublique is string = "xxx"

bufMessageCrypté = EncryptAsymmetricEnveloped(bufACrypter, sFichierCléPublique, sMotDePasseCléPublique)

// Décryptage  
// -------------
bufMessageCrypté is Buffer
bufMessageDécrypté is Buffer
sFichierCléPrivée is string = fExeDir() + "\ClePrivee.pem"
sMotDePasseCléPrivée is string = "xxx"

bufMessageDécrypté = DecryptAsymmetricEnveloped(bufMessageCrypté, sFichierCléPrivée, sMotDePasseCléPrivée)
bufACrypter is Buffer = "Message à crypter"
bufMessageCrypté is Buffer
bufCléPublique is Buffer
bufCléPrivée is Buffer
(bufCléPrivée, bufCléPublique) = EncryptGenerateRSAKey(1024)
// Cryptage d'une chaîne de caractères
//---------------------------------------
bufMessageCrypté = EncryptAsymmetricEnveloped(bufACrypter, bufCléPublique)

// Décryptage  
// -------------
bufMessageCrypté is Buffer
bufMessageDécrypté is Buffer

bufMessageDécrypté = DecryptAsymmetricEnveloped(bufMessageCrypté, bufCléPrivée)
Syntax
<Result> = EncryptAsymmetricEnveloped(<Content to encrypt> , <Public key file> [, <Password>])
<Result>: Buffer
All the information necessary for decryption (algorithms used, encrypted key, initialization vector and encrypted buffer).
<Content to encrypt>: Buffer
Buffer to encrypt.
<Public key file>: Character string or Buffer
  • Name and path of the file corresponding to the public key that will be used to encrypt. pem, der and p12 key formats are supported.
  • Buffer containing the public key that will be used for the encryption.
<Password>: Optional character string
Key file password (if required).
Remarks

Asymmetric encryption of an envelope

EncryptAsymmetricEnveloped generates a random encryption key that will be used to encrypt <Content to encrypt> with a symmetric algorithm.
The key is encrypted with the public key of <Public key file>.
<Result> contains a buffer that concatenates all the necessary information for the decryption (algorithms used, encrypted key, initialization buffer and encrypted buffer).
Remarks:
  • The private key is encrypted using OAEP padding.
  • The message is encrypted using AES 256 in CBC with PKCS padding.
Component: wd290com.dll
Minimum version required
  • Version 24
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Last update: 11/28/2023

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