AYUDA EN LÍNEA
 WINDEV, WEBDEV Y WINDEV MOBILE
Este contenido se ha traducido automáticamente.  Haga clic aquí  para ver la versión en inglés.
Ayuda / WLanguage / Funciones WLanguage / Funciones estándar / Funciones de archivos externos
  • Error handling
  • Operating mode in Windows Vista (and later)
  • Encrypting/Decrypting a character string
WINDEV
WindowsLinuxJavaReportes y ConsultasCódigo de Usuario (UMC)
WEBDEV
WindowsLinuxPHPWEBDEV - Código Navegador
WINDEV Mobile
AndroidWidget Android iPhone/iPadIOS WidgetApple WatchMac Catalyst
Otros
Procedimientos almacenados
Advertencia
A partir de la versión 24, fUncrypt se conserva por motivos de compatibilidad. Esta función ha sido reemplazada por fDecrypt.
Decrypts a file that was encrypted by fEncrypt.
Ejemplo
Reportes y Consultas 
// Decrypt a file
ResDecrypt = fDecrypt("C:\MyDir\EncryptedFile.txt", "C:\MyDir\DecryptedFile.txt", "Password")
Sintaxis
<Result> = fDecrypt(<Path of file to decrypt> , <Path of decrypted file> , <Password> [, <Type of encryption used> [, <Format of encrypted file>]])
<Result>: Boolean
  • True if decryption has been completed,
  • False otherwise. To get more details on the error, use ErrorInfo with the errMessage constant.
<Path of file to decrypt>: Character string
Name and full (or relative) path of the file to decrypt (up to 260 characters). A UNC path can be used. This file must have been encrypted by fEncrypt.
Windows This parameter can be in Ansi or Unicode format.
<Path of decrypted file>: Character string
Name and full (or relative) path of the decrypted file (up to 260 characters). A UNC path can be used.
Windows This parameter can be in Ansi or Unicode format.
<Password>: Character string or Secret string
Password used to decrypt the file. This password must be identical to the password used to encrypt the file. A long password provides better encryption security.
Novedad versión 2025
Cadenas secretas: Si utiliza el almacén de cadenas secretas, el tipo de cadena secreta utilizado para este parámetro debe ser "ANSI o Unicode string".
Para obtener más información sobre las cadenas secretas y el almacén, consulte Almacén de cadenas secretas.
<Type of encryption used>: Optional constant
Specifies the type of encryption used. This parameter must be identical to the one specified during the encryption.
encryptFast
(Default value)		Priority was given to the encryption speed (algorithm on 128 bits).
encryptNoneNo encryption was performed.
encryptRC516Priority is given to the encryption security (RC5 algorithm on 16 rounds).
encryptSecurePriority was given to the encryption security (RC5 algorithm on 128 bits).
<Format of encrypted file>: Optional Integer constant
Specifies the format of the encrypted file. This parameter must be identical to the one specified during the encryption.
encodeBASE64BASE 64 format. The encrypted file will contain printable characters only.
encodeNone or False
(Default value)		Binary format. The encrypted file may contain non-printable characters.
encodePCS or TrueASCII format. The encrypted file will contain printable characters only.
encodeUUEncodeUUEncode format. The encrypted file will contain printable characters only.
Observaciones

Error handling

fDecrypt throws an error in the following cases:
  • the file to decrypt does not exist or it is locked,
  • the path of the file to decrypt is invalid,
  • the <Password> is an empty string or it differs from the <Password> used to encrypt the file,
  • the <Type of encryption used> differs from the <Type of encryption> specified during the encryption,
  • the <Format of encrypted file> differs from the one specified during the encryption,
  • the user has no read rights on the file to decrypt,
  • the user has no write rights on the file to decrypt.
  • a Unicode string was used for the <Path of file to decrypt> or for the <Path of decrypted file> in an operating system such as Windows 98 or Windows Me.
Reportes y Consultas

Operating mode in Windows Vista (and later)

If this function does not work properly in Windows Vista (and later), check whether the file or directory used is not in one of the system directories (Windows directory or "Program Files" directory).
In Windows Vista (and later), with the UAC mechanism (User Account Control) enabled, you must have administrator privileges to handle and/or modify the files or directories in system directories (Windows directory or "Program Files" directory).
Programming tip: If you need to manipulate / modify files or directories, without needing administrator privileges, it is advisable:
  • avoid writing to the Windows directory or to the "Program Files" directory,
  • use the system directory of the application (returned by SysDir with the srAppDataCommun constant, for example).
Remark: Under Windows Vista (and higher), the virtualization mechanism makes applications "Vista-compatible".. If the file is created in a system directory without having sufficient rights, this file will actually be created in another directory (C:\Users\<LOGIN>AppData\Local\VirtualStore\Windows\). In this case, the file cannot be shared between several applications.

Encrypting/Decrypting a character string

To encrypt/decrypt a character string, use Encrypt and Decrypt.
Componente: wd300std.dll
Ver también
Versión mínima requerida
  • Versión 9
Esta página también está disponible para…
Comentarios
Haga clic en [Agregar] para publicar un comentario

Última modificación: 16/05/2025

Señalar un error o enviar una sugerencia | Ayuda local