RC4 Component
Properties Methods Events Config Settings Errors
Encrypt and decrypt data with the RC4 (ARC4 / ARCFOUR ) stream cipher.
Syntax
TipcRC4
Remarks
The RC4 component is used to encrypt and decrypt data with the RC4 (ARC4 / ARCFOUR ) stream cipher.
To begin simply specify the data you wish to encrypt or decrypt.
Input and Output Properties
The component will determine the source and destination of the input and output based on which properties are set.
The order in which the input properties are checked is as follows:
When a valid source is found the search stops. The order in which the output properties are checked is as follows:
- OutputFile
- OutputMessage: The output data is written to this property if no other destination is specified.
Before encrypting you must have a valid Key and IV. There are a few options available to you in regards to key management. The easiest option is to simply set KeyPassword. When KeyPassword is set the component will automatically create a Key and IV using the PKCS5 password digest algorithm. This means there is only one value you need to keep track of.
If you wish to have more control over the Key and IV values you may specify the properties yourself. If IV is left empty, one will be created for you when you call Encrypt or Decrypt.
A simple example:
Component.InputFile = "C:\MyFile.txt";
Component.OutputFile = "C:\Encrypted.txt";
Component.KeyPassword = "password";
Component.Encrypt();
Property List
The following is the full list of the properties of the component with short descriptions. Click on the links for further details.
InputFile | The file to process. |
InputMessage | The message to process. |
IV | The initialization vector (IV). |
Key | The secret key for the symmetric algorithm. |
KeyPassword | A password to generate the Key and IV . |
OutputFile | The output file when encrypting or decrypting. |
OutputMessage | The output message after processing. |
Overwrite | Indicates whether or not the component should overwrite files. |
UseHex | Whether input or output is hex encoded. |
Method List
The following is the full list of the methods of the component with short descriptions. Click on the links for further details.
Config | Sets or retrieves a configuration setting. |
Decrypt | Decrypts the data. |
DecryptBlock | Decrypts a block and returns the decrypted data. |
Encrypt | Encrypts the data. |
EncryptBlock | Encrypts data and returns the encrypted block. |
Reset | Resets the component. |
Event List
The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.
Error | Fired when information is available about errors during data delivery. |
Progress | Fired as progress is made. |
Config Settings
The following is a list of config settings for the component with short descriptions. Click on the links for further details.
KeySize | The size, in bits, of secret key for the symmetric algorithm. |
BuildInfo | Information about the product's build. |
CodePage | The system code page used for Unicode to Multibyte translations. |
LicenseInfo | Information about the current license. |
MaskSensitive | Whether sensitive data is masked in log messages. |
UseInternalSecurityAPI | Whether or not to use the system security libraries or an internal implementation. |
InputFile Property (RC4 Component)
The file to process.
Syntax
__property String InputFile = { read=FInputFile, write=FSetInputFile };
Default Value
""
Remarks
This property specifies the file to be processed. Set this property to the full or relative path to the file which will be processed.
Input and Output Properties
The component will determine the source and destination of the input and output based on which properties are set.
The order in which the input properties are checked is as follows:
- InputFile
- InputMessage
When a valid source is found the search stops. The order in which the output properties are checked is as follows:
- OutputFile
- OutputMessage: The output data is written to this property if no other destination is specified.
Data Type
String
InputMessage Property (RC4 Component)
The message to process.
Syntax
__property String InputMessage = { read=FInputMessage, write=FSetInputMessage }; __property DynamicArray<Byte> InputMessageB = { read=FInputMessageB, write=FSetInputMessageB };
Default Value
""
Remarks
This property specifies the message to be processed.
Input and Output Properties
The component will determine the source and destination of the input and output based on which properties are set.
The order in which the input properties are checked is as follows:
- InputFile
- InputMessage
When a valid source is found the search stops. The order in which the output properties are checked is as follows:
- OutputFile
- OutputMessage: The output data is written to this property if no other destination is specified.
Data Type
Byte Array
IV Property (RC4 Component)
The initialization vector (IV).
Syntax
__property String IV = { read=FIV, write=FSetIV }; __property DynamicArray<Byte> IVB = { read=FIVB, write=FSetIVB };
Default Value
""
Remarks
This property specifies the initialization vector (IV). By default this property is empty and the component will automatically generate a new IV value if KeyPassword or Key is set before Encrypt or EncryptBlock is called. The size of the IV property must be equal to the BlockSize divided by 8.
Data Type
Byte Array
Key Property (RC4 Component)
The secret key for the symmetric algorithm.
Syntax
__property String Key = { read=FKey, write=FSetKey }; __property DynamicArray<Byte> KeyB = { read=FKeyB, write=FSetKeyB };
Default Value
""
Remarks
This secret key is used both for encryption and decryption. The secret key should be known only to the sender and the receiver. The legal key size varies depending on the algorithm.
If this property is left empty and KeyPassword is specified, a Key value will be generated by the component as necessary.
Legal Key and Block Sizes (in bits)
AES | Rijndael | CAST | DES | IDEA | RC2 | RC4 | TripleDES | Blowfish | Twofish | TEA | |
Minimum Key Size | 128 | 128 | 112 | 64 | 128 | 112 | 112 | 128 | 112 | 128 | 128 |
Maximum Key Size | 256 | 256 | 128 | 64 | 128 | 128 | 2048 | 192 | 448 | 256 | 128 |
Key Size Step | 64 | 64 | 8 | 0 | 0 | 8 | 8 | 64 | 1 | 8 | 0 |
Block Size | 128 | 128/192/256 | 64 | 64 | 64 | 64 | N/A | 64 | 64 | 128 | 64* |
Note: When using TEA if Algorithm is set to XXTEA valid block sizes are 64 + n * 32. Where n is any positive integer.
The default KeySize is the Maximum Key Size.
Data Type
Byte Array
KeyPassword Property (RC4 Component)
A password to generate the Key and IV .
Syntax
__property String KeyPassword = { read=FKeyPassword, write=FSetKeyPassword };
Default Value
""
Remarks
When this property is set the component will calculate values for Key and IV using the PKCS5 password digest algorithm. This provides a simpler alternative to creating and managing Key and IV values directly.
The size of the Key generated is dependent on the value of KeySize.
Data Type
String
OutputFile Property (RC4 Component)
The output file when encrypting or decrypting.
Syntax
__property String OutputFile = { read=FOutputFile, write=FSetOutputFile };
Default Value
""
Remarks
This property specifies the file to which the output will be written when Encrypt or Decrypt is called. This may be set to an absolute or relative path.
This property is only applicable to Encrypt and Decrypt.
Input and Output Properties
The component will determine the source and destination of the input and output based on which properties are set.
The order in which the input properties are checked is as follows:
When a valid source is found the search stops. The order in which the output properties are checked is as follows:
- OutputFile
- OutputMessage: The output data is written to this property if no other destination is specified.
Data Type
String
OutputMessage Property (RC4 Component)
The output message after processing.
Syntax
__property String OutputMessage = { read=FOutputMessage }; __property DynamicArray<Byte> OutputMessageB = { read=FOutputMessageB };
Default Value
""
Remarks
This property will be populated with the output from the operation if OutputFile is not set.
Input and Output Properties
The component will determine the source and destination of the input and output based on which properties are set.
The order in which the input properties are checked is as follows:
When a valid source is found the search stops. The order in which the output properties are checked is as follows:
- OutputFile
- OutputMessage: The output data is written to this property if no other destination is specified.
This property is read-only and not available at design time.
Data Type
Byte Array
Overwrite Property (RC4 Component)
Indicates whether or not the component should overwrite files.
Syntax
__property bool Overwrite = { read=FOverwrite, write=FSetOverwrite };
Default Value
false
Remarks
This property indicates whether or not the component will overwrite OutputFile. If Overwrite is False, an error will be thrown whenever OutputFile exists before an operation. The default value is False.
Data Type
Boolean
UseHex Property (RC4 Component)
Whether input or output is hex encoded.
Syntax
__property bool UseHex = { read=FUseHex, write=FSetUseHex };
Default Value
false
Remarks
This property specifies whether the encrypted data is hex encoded.
If set to True, when Encrypt is called the component will perform the encryption as normal and then hex encode the output. OutputMessage or OutputFile will hold hex encoded data.
If set to True, when Decrypt is called the component will expect InputMessage or InputFile to hold hex encoded data. The component will then hex decode the data and perform decryption as normal.
Data Type
Boolean
Config Method (RC4 Component)
Sets or retrieves a configuration setting.
Syntax
String __fastcall Config(String ConfigurationString);
Remarks
Config is a generic method available in every component. It is used to set and retrieve configuration settings for the component.
These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.
To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).
To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.
Decrypt Method (RC4 Component)
Decrypts the data.
Syntax
void __fastcall Decrypt();
Remarks
This method will decrypt the specified data. The following properties are applicable:
Note that CipherMode must be set to the same value used during encryption or the results may be unexpected. If the CipherMode value does not match the value used during encryption the operation may succeed but the decrypted data may not be correct.
Input and Output Properties
The component will determine the source and destination of the input and output based on which properties are set.
The order in which the input properties are checked is as follows:
When a valid source is found the search stops. The order in which the output properties are checked is as follows:
- OutputFile
- OutputMessage: The output data is written to this property if no other destination is specified.
DecryptBlock Method (RC4 Component)
Decrypts a block and returns the decrypted data.
Syntax
DynamicArray<Byte> __fastcall DecryptBlock(DynamicArray<Byte> InputBuffer);
Remarks
This method decrypted the data specified by InputBuffer and returns the decrypted data.
Encrypt Method (RC4 Component)
Encrypts the data.
Syntax
void __fastcall Encrypt();
Remarks
This method will encrypt the specified data. The following properties are applicable:
Input and Output Properties
The component will determine the source and destination of the input and output based on which properties are set.
The order in which the input properties are checked is as follows:
When a valid source is found the search stops. The order in which the output properties are checked is as follows:
- OutputFile
- OutputMessage: The output data is written to this property if no other destination is specified.
EncryptBlock Method (RC4 Component)
Encrypts data and returns the encrypted block.
Syntax
DynamicArray<Byte> __fastcall EncryptBlock(DynamicArray<Byte> InputBuffer);
Remarks
This method encrypts the data specified by InputBuffer and returns the encrypted block.
Reset Method (RC4 Component)
Resets the component.
Syntax
void __fastcall Reset();
Remarks
When called, the component will reset all of its properties to their default values.
Error Event (RC4 Component)
Fired when information is available about errors during data delivery.
Syntax
typedef struct { int ErrorCode; String Description; } TipcRC4ErrorEventParams; typedef void __fastcall (__closure *TipcRC4ErrorEvent)(System::TObject* Sender, TipcRC4ErrorEventParams *e); __property TipcRC4ErrorEvent OnError = { read=FOnError, write=FOnError };
Remarks
The Error event is fired in case of exceptional conditions during message processing. Normally the component raises an exception.
The ErrorCode parameter contains an error code, and the Description parameter contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.
Progress Event (RC4 Component)
Fired as progress is made.
Syntax
typedef struct { __int64 BytesProcessed; int PercentProcessed; } TipcRC4ProgressEventParams; typedef void __fastcall (__closure *TipcRC4ProgressEvent)(System::TObject* Sender, TipcRC4ProgressEventParams *e); __property TipcRC4ProgressEvent OnProgress = { read=FOnProgress, write=FOnProgress };
Remarks
This event is fired automatically as data is processed by the component.
The PercentProcessed parameter indicates the current status of the operation.
The BytesProcessed parameter holds the total number of bytes processed so far.
Config Settings (RC4 Component)
The component accepts one or more of the following configuration settings. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.RC4 Config Settings
The legal key sizes vary depending on the algorithm. The KeySize and BlockSize configuration settings may be set to specify the key and block size (in bits).
This setting is only applicable when KeyPassword is specified.
Note that when using the EzCrypt component, KeySize should be set after setting the Algorithm property.
Base Config Settings
When queried, this setting will return a string containing information about the product's build.
The default code page is Unicode UTF-8 (65001).
The following is a list of valid code page identifiers:
Identifier | Name |
037 | IBM EBCDIC - U.S./Canada |
437 | OEM - United States |
500 | IBM EBCDIC - International |
708 | Arabic - ASMO 708 |
709 | Arabic - ASMO 449+, BCON V4 |
710 | Arabic - Transparent Arabic |
720 | Arabic - Transparent ASMO |
737 | OEM - Greek (formerly 437G) |
775 | OEM - Baltic |
850 | OEM - Multilingual Latin I |
852 | OEM - Latin II |
855 | OEM - Cyrillic (primarily Russian) |
857 | OEM - Turkish |
858 | OEM - Multilingual Latin I + Euro symbol |
860 | OEM - Portuguese |
861 | OEM - Icelandic |
862 | OEM - Hebrew |
863 | OEM - Canadian-French |
864 | OEM - Arabic |
865 | OEM - Nordic |
866 | OEM - Russian |
869 | OEM - Modern Greek |
870 | IBM EBCDIC - Multilingual/ROECE (Latin-2) |
874 | ANSI/OEM - Thai (same as 28605, ISO 8859-15) |
875 | IBM EBCDIC - Modern Greek |
932 | ANSI/OEM - Japanese, Shift-JIS |
936 | ANSI/OEM - Simplified Chinese (PRC, Singapore) |
949 | ANSI/OEM - Korean (Unified Hangul Code) |
950 | ANSI/OEM - Traditional Chinese (Taiwan; Hong Kong SAR, PRC) |
1026 | IBM EBCDIC - Turkish (Latin-5) |
1047 | IBM EBCDIC - Latin 1/Open System |
1140 | IBM EBCDIC - U.S./Canada (037 + Euro symbol) |
1141 | IBM EBCDIC - Germany (20273 + Euro symbol) |
1142 | IBM EBCDIC - Denmark/Norway (20277 + Euro symbol) |
1143 | IBM EBCDIC - Finland/Sweden (20278 + Euro symbol) |
1144 | IBM EBCDIC - Italy (20280 + Euro symbol) |
1145 | IBM EBCDIC - Latin America/Spain (20284 + Euro symbol) |
1146 | IBM EBCDIC - United Kingdom (20285 + Euro symbol) |
1147 | IBM EBCDIC - France (20297 + Euro symbol) |
1148 | IBM EBCDIC - International (500 + Euro symbol) |
1149 | IBM EBCDIC - Icelandic (20871 + Euro symbol) |
1200 | Unicode UCS-2 Little-Endian (BMP of ISO 10646) |
1201 | Unicode UCS-2 Big-Endian |
1250 | ANSI - Central European |
1251 | ANSI - Cyrillic |
1252 | ANSI - Latin I |
1253 | ANSI - Greek |
1254 | ANSI - Turkish |
1255 | ANSI - Hebrew |
1256 | ANSI - Arabic |
1257 | ANSI - Baltic |
1258 | ANSI/OEM - Vietnamese |
1361 | Korean (Johab) |
10000 | MAC - Roman |
10001 | MAC - Japanese |
10002 | MAC - Traditional Chinese (Big5) |
10003 | MAC - Korean |
10004 | MAC - Arabic |
10005 | MAC - Hebrew |
10006 | MAC - Greek I |
10007 | MAC - Cyrillic |
10008 | MAC - Simplified Chinese (GB 2312) |
10010 | MAC - Romania |
10017 | MAC - Ukraine |
10021 | MAC - Thai |
10029 | MAC - Latin II |
10079 | MAC - Icelandic |
10081 | MAC - Turkish |
10082 | MAC - Croatia |
12000 | Unicode UCS-4 Little-Endian |
12001 | Unicode UCS-4 Big-Endian |
20000 | CNS - Taiwan |
20001 | TCA - Taiwan |
20002 | Eten - Taiwan |
20003 | IBM5550 - Taiwan |
20004 | TeleText - Taiwan |
20005 | Wang - Taiwan |
20105 | IA5 IRV International Alphabet No. 5 (7-bit) |
20106 | IA5 German (7-bit) |
20107 | IA5 Swedish (7-bit) |
20108 | IA5 Norwegian (7-bit) |
20127 | US-ASCII (7-bit) |
20261 | T.61 |
20269 | ISO 6937 Non-Spacing Accent |
20273 | IBM EBCDIC - Germany |
20277 | IBM EBCDIC - Denmark/Norway |
20278 | IBM EBCDIC - Finland/Sweden |
20280 | IBM EBCDIC - Italy |
20284 | IBM EBCDIC - Latin America/Spain |
20285 | IBM EBCDIC - United Kingdom |
20290 | IBM EBCDIC - Japanese Katakana Extended |
20297 | IBM EBCDIC - France |
20420 | IBM EBCDIC - Arabic |
20423 | IBM EBCDIC - Greek |
20424 | IBM EBCDIC - Hebrew |
20833 | IBM EBCDIC - Korean Extended |
20838 | IBM EBCDIC - Thai |
20866 | Russian - KOI8-R |
20871 | IBM EBCDIC - Icelandic |
20880 | IBM EBCDIC - Cyrillic (Russian) |
20905 | IBM EBCDIC - Turkish |
20924 | IBM EBCDIC - Latin-1/Open System (1047 + Euro symbol) |
20932 | JIS X 0208-1990 & 0121-1990 |
20936 | Simplified Chinese (GB2312) |
21025 | IBM EBCDIC - Cyrillic (Serbian, Bulgarian) |
21027 | Extended Alpha Lowercase |
21866 | Ukrainian (KOI8-U) |
28591 | ISO 8859-1 Latin I |
28592 | ISO 8859-2 Central Europe |
28593 | ISO 8859-3 Latin 3 |
28594 | ISO 8859-4 Baltic |
28595 | ISO 8859-5 Cyrillic |
28596 | ISO 8859-6 Arabic |
28597 | ISO 8859-7 Greek |
28598 | ISO 8859-8 Hebrew |
28599 | ISO 8859-9 Latin 5 |
28605 | ISO 8859-15 Latin 9 |
29001 | Europa 3 |
38598 | ISO 8859-8 Hebrew |
50220 | ISO 2022 Japanese with no halfwidth Katakana |
50221 | ISO 2022 Japanese with halfwidth Katakana |
50222 | ISO 2022 Japanese JIS X 0201-1989 |
50225 | ISO 2022 Korean |
50227 | ISO 2022 Simplified Chinese |
50229 | ISO 2022 Traditional Chinese |
50930 | Japanese (Katakana) Extended |
50931 | US/Canada and Japanese |
50933 | Korean Extended and Korean |
50935 | Simplified Chinese Extended and Simplified Chinese |
50936 | Simplified Chinese |
50937 | US/Canada and Traditional Chinese |
50939 | Japanese (Latin) Extended and Japanese |
51932 | EUC - Japanese |
51936 | EUC - Simplified Chinese |
51949 | EUC - Korean |
51950 | EUC - Traditional Chinese |
52936 | HZ-GB2312 Simplified Chinese |
54936 | Windows XP: GB18030 Simplified Chinese (4 Byte) |
57002 | ISCII Devanagari |
57003 | ISCII Bengali |
57004 | ISCII Tamil |
57005 | ISCII Telugu |
57006 | ISCII Assamese |
57007 | ISCII Oriya |
57008 | ISCII Kannada |
57009 | ISCII Malayalam |
57010 | ISCII Gujarati |
57011 | ISCII Punjabi |
65000 | Unicode UTF-7 |
65001 | Unicode UTF-8 |
Identifier | Name |
1 | ASCII |
2 | NEXTSTEP |
3 | JapaneseEUC |
4 | UTF8 |
5 | ISOLatin1 |
6 | Symbol |
7 | NonLossyASCII |
8 | ShiftJIS |
9 | ISOLatin2 |
10 | Unicode |
11 | WindowsCP1251 |
12 | WindowsCP1252 |
13 | WindowsCP1253 |
14 | WindowsCP1254 |
15 | WindowsCP1250 |
21 | ISO2022JP |
30 | MacOSRoman |
10 | UTF16String |
0x90000100 | UTF16BigEndian |
0x94000100 | UTF16LittleEndian |
0x8c000100 | UTF32String |
0x98000100 | UTF32BigEndian |
0x9c000100 | UTF32LittleEndian |
65536 | Proprietary |
When queried, this setting will return a string containing information about the license this instance of a component is using. It will return the following information:
- Product: The product the license is for.
- Product Key: The key the license was generated from.
- License Source: Where the license was found (e.g., RuntimeLicense, License File).
- License Type: The type of license installed (e.g., Royalty Free, Single Server).
- Last Valid Build: The last valid build number for which the license will work.
In certain circumstances it may be beneficial to mask sensitive data, like passwords, in log messages. Set this to true to mask sensitive data. The default is true.
This setting only works on these components: AS3Receiver, AS3Sender, Atom, Client(3DS), FTP, FTPServer, IMAP, OFTPClient, SSHClient, SCP, Server(3DS), Sexec, SFTP, SFTPServer, SSHServer, TCPClient, TCPServer.
When set to false, the component will use the system security libraries by default to perform cryptographic functions where applicable.
Setting this configuration setting to true tells the component to use the internal implementation instead of using the system security libraries.
This setting is set to false by default on all platforms.
Trappable Errors (RC4 Component)
RC4 Errors
101 Unsupported algorithm. | |
102 No Key specified. | |
103 No IV specified. | |
104 Cannot read or write file. | |
107 Block size is not valid for this algorithm. | |
108 Key size is not valid for this algorithm. | |
111 OutputFile already exists and Overwrite is False. | |
121 The specified key is invalid. | |
123 IV size is not valid for this algorithm. | |
304 Cannot write file. | |
305 Cannot read file. | |
306 Cannot create file. | |
2004 Invalid padding. This may be an indication that the key is incorrect. |