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  • Asymmetric encryption of an envelope
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Stored procedures
Warning
From version 28, EncryptAsymmetricEnvelopped is kept for backward compatibility. This function is replaced by EncryptAsymmetricEnveloped.
Performs an asymmetric encryption of an envelope.
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 = EncryptAsymmetricEnveloped(bufToEncrypt, sPublicKeyFile, ...
sPublicKeyPassword)
 
// Decryption  
// -------------
bufEncryptedMessage is Buffer
bufDecryptedMessage is Buffer
sPrivateKeyFile is string = fExeDir() + "\PrivateKey.pem"
sPrivateKeyPassword is string = "xxx"
 
bufDecryptedMessage = DecryptAsymmetricEnveloped(bufEncryptedMessage, sPrivateKeyFile, ...
sPasswordPrivateKey)
New in version 28
bufToEncrypt is Buffer = "Message to encrypt"
bufEncryptedMessage is Buffer
bufPublicKey is Buffer
bufPrivateKey is Buffer
(bufPrivateKey, bufPublicKey) = EncryptGenerateRSAKey(1024)
// Encrypting a character string
//---------------------------------------
bufEncryptedMessage = EncryptAsymmetricEnveloped(bufToEncrypt, bufPublicKey)
 
// Decryption  
// -------------
bufEncryptedMessage is Buffer
bufDecryptedMessage is Buffer
 
bufDecryptedMessage = DecryptAsymmetricEnveloped(bufEncryptedMessage, bufPrivateKey)
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.
  • New in version 28
    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: wd280com.dll
Minimum version required
  • Version 24
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