MessageCompressor Component
Properties Methods Events Config Settings Errors
The MessageCompressor component compresses data and stores it in the PKCS#7 format.
Syntax
TsbxMessageCompressor
Remarks
PKCS#7 (Public Key Cryptography Standard #7) is a common format used to store encrypted, signed, compressed, and timestamped data. It is used by a variety of protocols, including S/MIME and CMS.
MessageCompressor and MessageDecompressor provide easy access to PKCS#7 CompressedData subformat. They are quite straightforward to configure and use:
- Set up the desired CompressionLevel
- Provide input and output destinations via InputBytes, InputFile, OutputBytes, and OutputFile properties.
- Call Compress to execute the operation.
MessageCompressor compressor = new MessageCompressor();
compressor.setCompressionLevel(4); //compression level (1 to 9). Default value is 6.
//path of the file where the decompressed message is located
compressor.setInputFile("./decompressedMessage.txt");
//path of the file where the compressed message will be written
compressor.setOutputFile("./compressedMessage.bin");
compressor.compress(); //compressing the file
Property List
The following is the full list of the properties of the component with short descriptions. Click on the links for further details.
CompressionLevel | Compression level to apply (1-9). |
FIPSMode | Reserved. |
InputBytes | Use this property to pass the input to component in byte array form. |
InputFile | Path to the source (uncompressed) file. |
OutputBytes | Use this property to read the output the component object has produced. |
OutputFile | Path to the destination (compressed) file. |
Method List
The following is the full list of the methods of the component with short descriptions. Click on the links for further details.
Compress | Compresses input data into a PKCS7 message. |
Config | Sets or retrieves a configuration setting. |
DoAction | Performs an additional action. |
Reset | Resets the component settings. |
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 | Information about errors during PKCS#7 message encryption. |
Notification | This event notifies the application about an underlying control flow event. |
Config Settings
The following is a list of config settings for the component with short descriptions. Click on the links for further details.
ContentType | Content type. |
FragmentSize | Fragment size. |
TempPath | Path for storing temporary files. |
UseUndefSize | Allows or forbids the use of ASN.1 tags of undefined size. |
ASN1UseGlobalTagCache | Controls whether ASN.1 module should use a global object cache. |
AssignSystemSmartCardPins | Specifies whether CSP-level PINs should be assigned to CNG keys. |
CheckKeyIntegrityBeforeUse | Enables or disable private key integrity check before use. |
CookieCaching | Specifies whether a cookie cache should be used for HTTP(S) transports. |
Cookies | Gets or sets local cookies for the component. |
DefDeriveKeyIterations | Specifies the default key derivation algorithm iteration count. |
DNSLocalSuffix | The suffix to assign for TLD names. |
EnableClientSideSSLFFDHE | Enables or disables finite field DHE key exchange support in TLS clients. |
GlobalCookies | Gets or sets global cookies for all the HTTP transports. |
HardwareCryptoUsePolicy | The hardware crypto usage policy. |
HttpUserAgent | Specifies the user agent name to be used by all HTTP clients. |
HttpVersion | The HTTP version to use in any inner HTTP client components created. |
IgnoreExpiredMSCTLSigningCert | Whether to tolerate the expired Windows Update signing certificate. |
ListDelimiter | The delimiter character for multi-element lists. |
LogDestination | Specifies the debug log destination. |
LogDetails | Specifies the debug log details to dump. |
LogFile | Specifies the debug log filename. |
LogFilters | Specifies the debug log filters. |
LogFlushMode | Specifies the log flush mode. |
LogLevel | Specifies the debug log level. |
LogMaxEventCount | Specifies the maximum number of events to cache before further action is taken. |
LogRotationMode | Specifies the log rotation mode. |
MaxASN1BufferLength | Specifies the maximal allowed length for ASN.1 primitive tag data. |
MaxASN1TreeDepth | Specifies the maximal depth for processed ASN.1 trees. |
OCSPHashAlgorithm | Specifies the hash algorithm to be used to identify certificates in OCSP requests. |
OldClientSideRSAFallback | Specifies whether the SSH client should use a SHA1 fallback. |
PKICache | Specifies which PKI elements (certificates, CRLs, OCSP responses) should be cached. |
PKICachePath | Specifies the file system path where cached PKI data is stored. |
ProductVersion | Returns the version of the SecureBlackbox library. |
ServerSSLDHKeyLength | Sets the size of the TLS DHE key exchange group. |
StaticDNS | Specifies whether static DNS rules should be used. |
StaticIPAddress[domain] | Gets or sets an IP address for the specified domain name. |
StaticIPAddresses | Gets or sets all the static DNS rules. |
Tag | Allows to store any custom data. |
TLSSessionGroup | Specifies the group name of TLS sessions to be used for session resumption. |
TLSSessionLifetime | Specifies lifetime in seconds of the cached TLS session. |
TLSSessionPurgeInterval | Specifies how often the session cache should remove the expired TLS sessions. |
UseCRLObjectCaching | Specifies whether reuse of loaded CRL objects is enabled. |
UseInternalRandom | Switches between SecureBlackbox-own and platform PRNGs. |
UseLegacyAdESValidation | Enables legacy AdES validation mode. |
UseOCSPResponseObjectCaching | Specifies whether reuse of loaded OCSP response objects is enabled. |
UseOwnDNSResolver | Specifies whether the client components should use own DNS resolver. |
UseSharedSystemStorages | Specifies whether the validation engine should use a global per-process copy of the system certificate stores. |
UseSystemNativeSizeCalculation | An internal CryptoAPI access tweak. |
UseSystemOAEPAndPSS | Enforces or disables the use of system-driven RSA OAEP and PSS computations. |
UseSystemRandom | Enables or disables the use of the OS PRNG. |
XMLRDNDescriptorName[OID] | Defines an OID mapping to descriptor names for the certificate's IssuerRDN or SubjectRDN. |
XMLRDNDescriptorPriority[OID] | Specifies the priority of descriptor names associated with a specific OID. |
XMLRDNDescriptorReverseOrder | Specifies whether to reverse the order of descriptors in RDN. |
XMLRDNDescriptorSeparator | Specifies the separator used between descriptors in RDN. |
CompressionLevel Property (MessageCompressor Component)
Compression level to apply (1-9).
Syntax
property CompressionLevel: Integer read get_CompressionLevel write set_CompressionLevel;
Default Value
6
Remarks
Use this property to specify the compression level to use, from 1 (the lightest, but quickest) to 9 (the best, but the slowest).
FIPSMode Property (MessageCompressor Component)
Reserved.
Syntax
property FIPSMode: Boolean read get_FIPSMode write set_FIPSMode;
Default Value
false
Remarks
This property is reserved for future use.
InputBytes Property (MessageCompressor Component)
Use this property to pass the input to component in byte array form.
Syntax
property InputBytes: TBytes read get_InputBytes write set_InputBytes;
Remarks
Assign a byte array containing the data to be processed to this property.
This property is not available at design time.
InputFile Property (MessageCompressor Component)
Path to the source (uncompressed) file.
Syntax
property InputFile: String read get_InputFile write set_InputFile;
Default Value
''
Remarks
Use this property to provide the compression source.
OutputBytes Property (MessageCompressor Component)
Use this property to read the output the component object has produced.
Syntax
property OutputBytes: TBytes read get_OutputBytes;
Remarks
Read the contents of this property after the operation has completed to read the produced output. This property will only be set if the OutputFile and OutputStream properties had not been assigned.
This property is read-only and not available at design time.
OutputFile Property (MessageCompressor Component)
Path to the destination (compressed) file.
Syntax
property OutputFile: String read get_OutputFile write set_OutputFile;
Default Value
''
Remarks
Use this property to specify the file where the compressed PKCS#7 message is to be saved.
Compress Method (MessageCompressor Component)
Compresses input data into a PKCS7 message.
Syntax
procedure Compress();
Remarks
Call this method to compress the data residing provided via InputFile (or InputStream) and save the output in OutputFile (OutputStream).
Config Method (MessageCompressor Component)
Sets or retrieves a configuration setting.
Syntax
function Config(ConfigurationString: String): String;
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.
DoAction Method (MessageCompressor Component)
Performs an additional action.
Syntax
function DoAction(ActionID: String; ActionParams: String): String;
Remarks
DoAction is a generic method available in every component. It is used to perform an additional action introduced after the product major release. The list of actions is not fixed, and may be flexibly extended over time.
The unique identifier (case insensitive) of the action is provided in the ActionID parameter.
ActionParams contains the value of a single parameter, or a list of multiple parameters for the action in the form of PARAM1=VALUE1;PARAM2=VALUE2;....
Common ActionIDs:
Action | Parameters | Returned value | Description |
ResetTrustedListCache | none | none | Clears the cached list of trusted lists. |
ResetCertificateCache | none | none | Clears the cached certificates. |
ResetCRLCache | none | none | Clears the cached CRLs. |
ResetOCSPResponseCache | none | none | Clears the cached OCSP responses. |
Reset Method (MessageCompressor Component)
Resets the component settings.
Syntax
procedure Reset();
Remarks
Reset is a generic method available in every component.
Error Event (MessageCompressor Component)
Information about errors during PKCS#7 message encryption.
Syntax
type TErrorEvent = procedure ( Sender: TObject; ErrorCode: Integer; const Description: String ) of Object;
property OnError: TErrorEvent read FOnError write FOnError;
Remarks
The event is fired in case of exceptional conditions during message processing.
ErrorCode contains an error code and Description contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Messages section.
Notification Event (MessageCompressor Component)
This event notifies the application about an underlying control flow event.
Syntax
type TNotificationEvent = procedure ( Sender: TObject; const EventID: String; const EventParam: String ) of Object;
property OnNotification: TNotificationEvent read FOnNotification write FOnNotification;
Remarks
The component fires this event to let the application know about some event, occurrence, or milestone in the component. For example, it may fire to report completion of the document processing. The list of events being reported is not fixed, and may be flexibly extended over time.
The unique identifier of the event is provided in the EventID parameter. EventParam contains any parameters accompanying the occurrence. Depending on the type of the component, the exact action it is performing, or the document being processed, one or both may be omitted.
Config Settings (MessageCompressor 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.MessageCompressor Config Settings
Base Config Settings
You can switch this property off to improve performance if your project only uses known, good private keys.
Supported values are:
off | No caching (default) | |
local | Local caching | |
global | Global caching |
This setting only applies to sessions negotiated with TLS version 1.3.
Supported values are:
file | File | |
console | Console | |
systemlog | System Log (supported for Android only) | |
debugger | Debugger (supported for VCL for Windows and .Net) |
Supported values are:
time | Current time | |
level | Level | |
package | Package name | |
module | Module name | |
class | Class name | |
method | Method name | |
threadid | Thread Id | |
contenttype | Content type | |
content | Content | |
all | All details |
Supported filter names are:
exclude-package | Exclude a package specified in the value | |
exclude-module | Exclude a module specified in the value | |
exclude-class | Exclude a class specified in the value | |
exclude-method | Exclude a method specified in the value | |
include-package | Include a package specified in the value | |
include-module | Include a module specified in the value | |
include-class | Include a class specified in the value | |
include-method | Include a method specified in the value |
none | No flush (caching only) | |
immediate | Immediate flush (real-time logging) | |
maxcount | Flush cached entries upon reaching LogMaxEventCount entries in the cache. |
Supported values are:
none | None (by default) | |
fatal | Severe errors that cause premature termination. | |
error | Other runtime errors or unexpected conditions. | |
warning | Use of deprecated APIs, poor use of API, 'almost' errors, other runtime situations that are undesirable or unexpected, but not necessarily "wrong". | |
info | Interesting runtime events (startup/shutdown). | |
debug | Detailed information on flow of through the system. | |
trace | More detailed information. |
The default value of this setting is 100.
none | No rotation | |
deleteolder | Delete older entries from the cache upon reaching LogMaxEventCount | |
keepolder | Keep older entries in the cache upon reaching LogMaxEventCount (newer entries are discarded) |
Supported Values:
certificate | Enables caching of certificates. |
crl | Enables caching of Certificate Revocation Lists (CRLs). |
ocsp | Enables caching of OCSP (Online Certificate Status Protocol) responses. |
Example (default value):
PKICache=certificate,crl,ocsp
In this example, the component caches certificates, CRLs, and OCSP responses.
The default value is an empty string - no cached PKI data is stored on disk.
Example:
PKICachePath=C:\Temp\cache
In this example, the cached PKI data is stored in the C:\Temp\cache directory.
Supported values are:
none | No static DNS rules (default) | |
local | Local static DNS rules | |
global | Global static DNS rules |
This setting only applies to certificates originating from a Windows system store.
The property accepts comma-separated values where the first descriptor name is used when the OID is mapped, and subsequent values act as aliases for parsing.
Syntax:
Config("XMLRDNDescriptorName[OID]=PrimaryName,Alias1,Alias2");
Where:
OID: The Object Identifier from the certificate's IssuerRDN or SubjectRDN that you want to map.
PrimaryName: The main descriptor name used in the XML signature when the OID is encountered.
Alias1, Alias2, ...: Optional alternative names recognized during parsing.
Usage Examples:
Map OID 2.5.4.5 to SERIALNUMBER:
Config("XMLRDNDescriptorName[2.5.4.5]=SERIALNUMBER");
Map OID 1.2.840.113549.1.9.1 to E, with aliases EMAIL and EMAILADDRESS:
Config("XMLRDNDescriptorName[1.2.840.113549.1.9.1]=E,EMAIL,EMAILADDRESS");
Trappable Errors (MessageCompressor Component)
MessageCompressor Errors
1048577 | Invalid parameter (SB_ERROR_INVALID_PARAMETER) |
1048578 | Invalid configuration (SB_ERROR_INVALID_SETUP) |
1048579 | Invalid state (SB_ERROR_INVALID_STATE) |
1048580 | Invalid value (SB_ERROR_INVALID_VALUE) |
1048581 | Private key not found (SB_ERROR_NO_PRIVATE_KEY) |
1048582 | Cancelled by the user (SB_ERROR_CANCELLED_BY_USER) |
1048583 | The file was not found (SB_ERROR_NO_SUCH_FILE) |
1048584 | Unsupported feature or operation (SB_ERROR_UNSUPPORTED_FEATURE) |
1048585 | General error (SB_ERROR_GENERAL_ERROR) |