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DecryptAsymmetric (Function) In french: DécrypteAsymétrique Decrypts a buffer with a private/public key algorithm with RSA encryption. The data has been previously encrypted with EncryptAsymmetric. // Encrypting a character string
// ---------------------------------------
bufToEncrypt is Buffer = "Message to encrypt"
bufEncryptedMessage is Buffer
sPublicKeyFile is string = fExeDir() + "\PublicKey.pem"
sPublicKeyPassword is string = "xxx"
Â
bufEncryptedMessage = EncryptAsymmetric(bufToEncrypt, sPublicKeyFile, ...
sPublicKeyPassword, cryptPaddingPKCS1)
Â
// Decryption Â
// -------------
bufEncryptedMessage is Buffer
bufDecryptedMessage is Buffer
sPrivateKeyFile is string = fExeDir() + "\PrivateKey.pem"
sPrivateKeyPassword is string = "xxx"
Â
bufDecryptedMessage = DecryptAsymmetric(bufEncryptedMessage, sPrivateKeyFile, ...
sPrivateKeyPassword, cryptPaddingPKCS1)
bufToEncrypt is Buffer = StringToUTF8("สวัสดี Test")
bufPrivateKey is Buffer
bufPublicKey is Buffer
(bufPrivateKey, bufPublicKey) = EncryptGenerateRSAKey(1024)
// Encryption
bufEncrypted is Buffer = EncryptAsymmetric(bufToEncrypt, bufPublicKey)
bufSign is Buffer = CertificateSignString(bufEncrypted, bufPrivateKey, "", ...
certSignatureOnly + certSHA256)
// Decryption
IF CertificateCheckString(bufEncrypted, bufSign, bufPublicKey, "", "", ...
certSignatureOnly + certSHA256) THEN
bufReadable is Buffer = DecryptAsymmetric(bufEncrypted, bufPrivateKey)
Trace("Authentic message")
Trace(UTF8ToString(bufReadable))
ELSE
Trace("Unauthenticated message")
END Syntax
<Result> = DecryptAsymmetric(<Content to decrypt> , <Private key file> [, <Password> [, <Padding>]])
<Result>: Buffer Decrypted data. <Content to decrypt>: Buffer Buffer to decrypt. <Private key file>: Character string or Buffer - Name and path of the file corresponding to the RSA private key to be used to decrypt the data. pem and p12 key formats are supported.
- Buffer containing the RSA private key to be used to decrypt the data.
<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:
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Unit examples (WINDEV): Asymmetric encryption
[ + ] Using the asymmetric encryption functions (EncryptAsymmetric, DecryptAsymmetric)
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