HashFunction Class
Properties Methods Events Config Settings Errors
The HashFunction class implements a wide variety of algorithms for message hashing.
Syntax
secureblackbox.Hashfunction
Remarks
HashFunction allows you to hash messages using a variety of industry standard hashing algorithms. Algorithms of both Hash and HMAC type are supported.
You can feed your data to HashFunction in one go, or in chunks. Use Hash method to initialize the hash function, pass the buffer, and calculate the hash in one line of code.
Alternatively, use Reset, Update, and Finish in sequence to perform each of those steps individually. You can call Update (and its UpdateFile and
UpdateStream variants) repeatedly between Reset and Finish, effectively passing the data in a number of portions:
// Feeding the data in one go:
Hashfunction hf = new Hashfunction();
hf.Algorithm = "SHA256";
byte[] hash = hf.Hash(buffer);
// Feeding data chunk by chunk:
Hashfunction hf = new Hashfunction();
hf.Algorithm = "SHA256";
hf.Reset();
hf.Update(buffer1);
hf.Update(buffer2);
hf.Update(buffer3);
byte[] hash = hf.Finish();
To use keyed HMAC, you need to provide the secret key first. Use CryptoKeyManager to create and initialize the key object:
Cryptokeymanager km = new Cryptokeymanager();
km.ImportBytes(hmacKey, Constants.kffDER, "SHA256", "", "", Constants.ktSecret);
Hashfunction hf = new Hashfunction();
hf.Algorithm = "SHA256";
hf.Key = km.Key;
byte[] hash = hf.Hash(buffer);
Use OutputEncoding to set the desired encoding method.
Property List
The following is the full list of the properties of the class with short descriptions. Click on the links for further details.
Algorithm | The hash algorithm to use when hashing data. |
FIPSMode | Reserved. |
InputStream | A stream containing the input data. |
JsonSettings | Provides a container for JSON settings. |
Key | The key to use during the hashing. |
OutputEncoding | The encoding to use for the output data. |
Method List
The following is the full list of the methods of the class with short descriptions. Click on the links for further details.
Config | Sets or retrieves a configuration setting. |
DoAction | Performs an additional action. |
Finish | Completes the hash and returns the resulting message digest. |
Hash | Calculates a message digest over a byte array. |
HashFile | Calculates a message digest over data contained in a file. |
HashStream | Calculates a message digest over data contained in a stream. |
Reset | Resets the hash function context. |
Update | Feeds a chunk of data to the hash function. |
UpdateFile | Feeds the contents of a file to the hash function. |
UpdateStream | Feeds the contents of a stream to the hash function. |
Event List
The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.
Error | Informs about errors during cryptographic operations. |
Notification | This event notifies the application about an underlying control flow event. |
Config Settings
The following is a list of config settings for the class with short descriptions. Click on the links for further details.
TempPath | Path for storing temporary files. |
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 class (supported for HTTPClient, RESTClient and SOAPClient only). |
DefDeriveKeyIterations | Specifies the default key derivation algorithm iteration count. |
EnableClientSideSSLFFDHE | Enables or disables finite field DHE key exchange support in TLS clients. |
GlobalCookies | Gets or sets global cookies for all the HTTP transports. |
HttpUserAgent | Specifies the user agent name to be used by all HTTP clients. |
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. |
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. |
UseOwnDNSResolver | Specifies whether the client classes should use own DNS resolver. |
UseSharedSystemStorages | Specifies whether the validation engine should use a global per-process copy of the system certificate stores. |
UseSystemOAEPAndPSS | Enforces or disables the use of system-driven RSA OAEP and PSS computations. |
UseSystemRandom | Enables or disables the use of the OS PRNG. |
Algorithm Property (HashFunction Class)
The hash algorithm to use when hashing data.
Syntax
public String getAlgorithm(); public void setAlgorithm(String algorithm);
Default Value
"SHA256"
Remarks
SB_HASH_ALGORITHM_SHA1 | SHA1 | |
SB_HASH_ALGORITHM_SHA224 | SHA224 | |
SB_HASH_ALGORITHM_SHA256 | SHA256 | |
SB_HASH_ALGORITHM_SHA384 | SHA384 | |
SB_HASH_ALGORITHM_SHA512 | SHA512 | |
SB_HASH_ALGORITHM_MD2 | MD2 | |
SB_HASH_ALGORITHM_MD4 | MD4 | |
SB_HASH_ALGORITHM_MD5 | MD5 | |
SB_HASH_ALGORITHM_RIPEMD160 | RIPEMD160 | |
SB_HASH_ALGORITHM_CRC32 | CRC32 | |
SB_HASH_ALGORITHM_SSL3 | SSL3 | |
SB_HASH_ALGORITHM_GOST_R3411_1994 | GOST1994 | |
SB_HASH_ALGORITHM_WHIRLPOOL | WHIRLPOOL | |
SB_HASH_ALGORITHM_POLY1305 | POLY1305 | |
SB_HASH_ALGORITHM_SHA3_224 | SHA3_224 | |
SB_HASH_ALGORITHM_SHA3_256 | SHA3_256 | |
SB_HASH_ALGORITHM_SHA3_384 | SHA3_384 | |
SB_HASH_ALGORITHM_SHA3_512 | SHA3_512 | |
SB_HASH_ALGORITHM_BLAKE2S_128 | BLAKE2S_128 | |
SB_HASH_ALGORITHM_BLAKE2S_160 | BLAKE2S_160 | |
SB_HASH_ALGORITHM_BLAKE2S_224 | BLAKE2S_224 | |
SB_HASH_ALGORITHM_BLAKE2S_256 | BLAKE2S_256 | |
SB_HASH_ALGORITHM_BLAKE2B_160 | BLAKE2B_160 | |
SB_HASH_ALGORITHM_BLAKE2B_256 | BLAKE2B_256 | |
SB_HASH_ALGORITHM_BLAKE2B_384 | BLAKE2B_384 | |
SB_HASH_ALGORITHM_BLAKE2B_512 | BLAKE2B_512 | |
SB_HASH_ALGORITHM_SHAKE_128 | SHAKE_128 | |
SB_HASH_ALGORITHM_SHAKE_256 | SHAKE_256 | |
SB_HASH_ALGORITHM_SHAKE_128_LEN | SHAKE_128_LEN | |
SB_HASH_ALGORITHM_SHAKE_256_LEN | SHAKE_256_LEN |
FIPSMode Property (HashFunction Class)
Reserved.
Syntax
public boolean isFIPSMode(); public void setFIPSMode(boolean FIPSMode);
Default Value
False
Remarks
This property is reserved for future use.
InputStream Property (HashFunction Class)
A stream containing the input data.
Syntax
public java.io.InputStream getInputStream(); public void setInputStream(java.io.InputStream inputStream);
Default Value
null
Remarks
Use this property to specify the data to be used by HashStream and UpdateStream methods.
This property is not available at design time.
JsonSettings Property (HashFunction Class)
Provides a container for JSON settings.
Syntax
public JWSettings getJsonSettings();
Remarks
Use this property when using JSON Web Signatures to tune up the JSON parameters.
This property is read-only.
Key Property (HashFunction Class)
The key to use during the hashing.
Syntax
public CryptoKey getKey(); public void setKey(CryptoKey key);
Remarks
Assign a properly configured cryptographic key object to this property to use it during the hashing operation. This would normally be a HMAC key.
This property is not available at design time.
OutputEncoding Property (HashFunction Class)
The encoding to use for the output data.
Syntax
public int getOutputEncoding(); public void setOutputEncoding(int outputEncoding); Enumerated values: public final static int cetDefault = 0; public final static int cetBinary = 1; public final static int cetBase64 = 2; public final static int cetCompact = 3; public final static int cetJSON = 4;
Default Value
0
Remarks
Use this property to configure the type of encoding to be used for the output data.
cetDefault | 0 | The default encoding type in current circumstances. This depends on the operation and the type of the key being used. |
cetBinary | 1 | Raw binary encoding (no encoding) |
cetBase64 | 2 | Base64 encoding (armouring) |
cetCompact | 3 | JSON compact encoding |
cetJSON | 4 | JSON standard encoding |
Config Method (Hashfunction Class)
Sets or retrieves a configuration setting.
Syntax
public String config(String configurationString);
Remarks
Config is a generic method available in every class. It is used to set and retrieve configuration settings for the class.
These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, 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 (Hashfunction Class)
Performs an additional action.
Syntax
public String doAction(String actionID, String actionParams);
Remarks
DoAction is a generic method available in every class. 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 of the action is provided in ActionID parameter. ActionParams contains a list of parameters for the action in the form of PARAM1=VALUE1;PARAM2=VALUE2;....
Finish Method (Hashfunction Class)
Completes the hash and returns the resulting message digest.
Syntax
public byte[] finish();
Remarks
This method finalizes the hashing operation and returns the message digest of the input data. Use it in conjuction with Reset and Update methods to process data in chunks.
Hash Method (Hashfunction Class)
Calculates a message digest over a byte array.
Syntax
public byte[] hash(byte[] buffer);
Remarks
This method calculates and returns a message digest over the content of Buffer. This is a quick way to calculate a hash over a byte array in one go.
HashFile Method (Hashfunction Class)
Calculates a message digest over data contained in a file.
Syntax
public byte[] hashFile(String sourceFile);
Remarks
This method calculates and returns a message digest over the data contained in file SourceFile. This is a quick way to calculate a hash over a file content in one go.
HashStream Method (Hashfunction Class)
Calculates a message digest over data contained in a stream.
Syntax
public byte[] hashStream();
Remarks
This method calculates a message digest over the data contained in InputStream. This is a quick way of calculating a message data over a stream content in one go.
Reset Method (Hashfunction Class)
Resets the hash function context.
Syntax
public void reset();
Remarks
Reset resets the context of the hash function, discarding any data passed to it previously.
Use this method to restart the hash calculation process from scratch.
This method does not affect one-go methods like Hash or HashStream; they reset the hash function context automatically.
Update Method (Hashfunction Class)
Feeds a chunk of data to the hash function.
Syntax
public void update(byte[] buffer);
Remarks
This method feeds Buffer to the hash function. Call this method repeatedly to pass your data to the hash function chunk by chunk.
Remember to initialize the hash function with an Reset call before starting to feed data with this method. After the whole volume of data has been sent, complete the calculation and obtain the resulting message digest with a Finish call.
UpdateFile Method (Hashfunction Class)
Feeds the contents of a file to the hash function.
Syntax
public void updateFile(String sourceFile);
Remarks
Call this method to pass the contents of a file to the hash function. You can call this function repeatedly and mix it with Update to feed the hash function with many separate chunks of data.
Remember to initialize the hash function with an Reset call before starting hashing the data. Once all the data chunks have been submitted, finalize the hash function and obtain the resulting message digest by calling Finish.
UpdateStream Method (Hashfunction Class)
Feeds the contents of a stream to the hash function.
Syntax
public void updateStream();
Remarks
Call this method to pass the contents of a stream to the hash function. You can call this function repeatedly and mix it with Update to feed the hash function with many separate chunks of data.
Remember to initialize the hash function with an Reset call before starting hashing the data. Once all the data chunks have been submitted, finalize the hash function and obtain the resulting message digest by calling Finish.
Error Event (Hashfunction Class)
Informs about errors during cryptographic operations.
Syntax
public class DefaultHashfunctionEventListener implements HashfunctionEventListener { ... public void error(HashfunctionErrorEvent e) {} ... } public class HashfunctionErrorEvent { public int errorCode; public String description; }
Remarks
Class fires this event if an error happens during a cryptographic operation.
ErrorCode contains an error code and Description contains a textual description of the error that happened.
Notification Event (Hashfunction Class)
This event notifies the application about an underlying control flow event.
Syntax
public class DefaultHashfunctionEventListener implements HashfunctionEventListener { ... public void notification(HashfunctionNotificationEvent e) {} ... } public class HashfunctionNotificationEvent { public String eventID; public String eventParam; }
Remarks
The class 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 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.
CryptoKey Type
This container represents a cryptographic key.
Remarks
This type is a universal placeholder for cryptographic keys.
Fields
Algorithm String |
The algorithm of the cryptographic key. A cryptokey object may hold either symmetric, MAC, or public key. Public key algorithms: RSA, ECDSA, Elgamal, DH.
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Bits int |
The length of the key in bits. |
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Curve String |
This property specifies the name of the curve the EC key is built on. |
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Exportable boolean |
Returns True if the key is exportable (can be serialized into an array of bytes), and False otherwise. |
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ID byte[] |
Provides access to a storage-specific key identifier. Key identifiers are used by cryptographic providers to refer to a particular key and/or distinguish between different keys. They are typically unique within a storage, but there is no guarantee that a particular cryptoprovider will conform to that (or will assign any key IDs at all). |
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IV byte[] |
The initialization vector (IV) of a symmetric key. This is normally a public part of a symmetric key, the idea of which is to introduce randomness to the encrypted data and/or serve as a first block in chaining ciphers. |
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Key byte[] |
The byte array representation of the key. This may not be available for non-Exportable keys. |
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Nonce byte[] |
A nonce value associated with a key. It is similar to IV, but its only purpose is to introduce randomness. |
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Private boolean |
Returns True if the object hosts a private key, and False otherwise. |
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Public boolean |
Returns True if the object hosts a public key, and False otherwise. |
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Subject byte[] |
Returns the key subject. This is a cryptoprovider-dependent value, which normally aims to provide some user-friendly insight into the key owner. |
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Symmetric boolean |
Returns True if the object contains a symmetric key, and False otherwise. |
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Valid boolean |
Returns True if this key is valid. The term Valid highly depends on the kind of the key being stored. A symmetric key is considered valid if its length fits the algorithm being set. The validity of an RSA key also ensures that the RSA key elements (primes, exponents, and modulus) are consistent. |
Constructors
public CryptoKey();
Creates an empty crypto key object.
JWSettings Type
This container represents JSON web security settings.
Remarks
This type contains properties specific to JSON Web Security.
Fields
KeyHeaderParams String |
Contains key header parameters. |
ProtectedHeader String |
Provides access to the header being protected. |
UnprotectedHeader String |
Provides access to the unprotected part of the header. |
UnprotectedHeaderParams String |
Contains unprotected header parameters. |
Constructors
public JWSettings();
Creates an json settings object.
Config Settings (Hashfunction Class)
The class 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 class, access to these internal properties is provided through the Config method.HashFunction Config Settings | ||||||||||||||||||||||||||||||
TempPath: Path for storing temporary files.This setting specifies an absolute path to the location on disk where temporary files are stored. | ||||||||||||||||||||||||||||||
Base Config Settings | ||||||||||||||||||||||||||||||
CheckKeyIntegrityBeforeUse:
Enables or disable private key integrity check before use.This global property enables or disables private key material check before each signing operation. This slows down performance a bit,
but prevents a selection of attacks on RSA keys where keys with unknown origins are used.
You can switch this property off to improve performance if your project only uses known, good private keys. |
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CookieCaching:
Specifies whether a cookie cache should be used for HTTP(S) transports.Set this property to enable or disable cookies caching for the class.
Supported values are:
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Cookies: Gets or sets local cookies for the class (supported for HTTPClient, RESTClient and SOAPClient only).Use this property to get cookies from the internal cookie storage of the class and/or restore them back between application sessions. | ||||||||||||||||||||||||||||||
DefDeriveKeyIterations: Specifies the default key derivation algorithm iteration count.This global property sets the default number of iterations for all supported key derivation algorithms. Note that you can provide the required number of iterations by using properties of the relevant key generation component; this global setting is used in scenarios where specific iteration count is not or cannot be provided. | ||||||||||||||||||||||||||||||
EnableClientSideSSLFFDHE:
Enables or disables finite field DHE key exchange support in TLS clients.This global property enables or disables support for finite field DHE key exchange methods in TLS clients. FF DHE is a slower
algorithm if compared to EC DHE; enabling it may result in slower connections.
This setting only applies to sessions negotiated with TLS version 1.3. |
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GlobalCookies: Gets or sets global cookies for all the HTTP transports.Use this property to get cookies from the GLOBAL cookie storage or restore them back between application sessions. These cookies will be used by all the classes that have its CookieCaching property set to "global". | ||||||||||||||||||||||||||||||
HttpUserAgent: Specifies the user agent name to be used by all HTTP clients.This global setting defines the User-Agent field of the HTTP request provides information about the software that initiates the request. This value will be used by all the HTTP clients including the ones used internally in other classes. | ||||||||||||||||||||||||||||||
LogDestination:
Specifies the debug log destination.Contains a comma-separated list of values that specifies where debug log should be dumped.
Supported values are:
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LogDetails:
Specifies the debug log details to dump.Contains a comma-separated list of values that specifies which debug log details to dump.
Supported values are:
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LogFile: Specifies the debug log filename.Use this property to provide a path to the log file. | ||||||||||||||||||||||||||||||
LogFilters:
Specifies the debug log filters.Contains a comma-separated list of value pairs ("name:value") that describe filters.
Supported filter names are:
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LogFlushMode:
Specifies the log flush mode.Use this property to set the log flush mode. The following values are defined:
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LogLevel:
Specifies the debug log level.Use this property to provide the desired debug log level.
Supported values are:
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LogMaxEventCount:
Specifies the maximum number of events to cache before further action is taken.Use this property to specify the log event number threshold. This threshold may have different effects,
depending on the rotation setting and/or the flush mode.
The default value of this setting is 100. |
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LogRotationMode:
Specifies the log rotation mode.Use this property to set the log rotation mode. The following values are defined:
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MaxASN1BufferLength: Specifies the maximal allowed length for ASN.1 primitive tag data.This global property limits the maximal allowed length for ASN.1 tag data for non-content-carrying structures, such as certificates, CRLs, or timestamps. It does not affect structures that can carry content, such as CMS/CAdES messages. This is a security property aiming at preventing DoS attacks. | ||||||||||||||||||||||||||||||
MaxASN1TreeDepth: Specifies the maximal depth for processed ASN.1 trees.This global property limits the maximal depth of ASN.1 trees that the component can handle without throwing an error. This is a security property aiming at preventing DoS attacks. | ||||||||||||||||||||||||||||||
OCSPHashAlgorithm: Specifies the hash algorithm to be used to identify certificates in OCSP requests.This global setting defines the hash algorithm to use in OCSP requests during chain validation. Some OCSP responders can only use older algorithms, in which case setting this property to SHA1 may be helpful. | ||||||||||||||||||||||||||||||
StaticDNS:
Specifies whether static DNS rules should be used.Set this property to enable or disable static DNS rules for the class. Works only if UseOwnDNSResolver is set to true.
Supported values are:
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StaticIPAddress[domain]: Gets or sets an IP address for the specified domain name.Use this property to get or set an IP address for the specified domain name in the internal (of the class) or global DNS rules storage depending on the StaticDNS value. The type of the IP address (IPv4 or IPv6) is determined automatically. If both addresses are available, they are devided by the | (pipe) character. | ||||||||||||||||||||||||||||||
StaticIPAddresses: Gets or sets all the static DNS rules.Use this property to get static DNS rules from the current rules storage or restore them back between application sessions. If StaticDNS of the class is set to "local", the property returns/restores the rules from/to the internal storage of the class. If StaticDNS of the class is set to "global", the property returns/restores the rules from/to the GLOBAL storage. The rules list is returned and accepted in JSON format. | ||||||||||||||||||||||||||||||
Tag: Allows to store any custom data.Use this config property to store any custom data. | ||||||||||||||||||||||||||||||
UseOwnDNSResolver: Specifies whether the client components should use own DNS resolver.Set this global property to false to force all the client components to use the DNS resolver provided by the target OS instead of using own one. | ||||||||||||||||||||||||||||||
UseSharedSystemStorages: Specifies whether the validation engine should use a global per-process copy of the system certificate stores.Set this global property to false to make each validation run use its own copy of system certificate stores. | ||||||||||||||||||||||||||||||
UseSystemOAEPAndPSS:
Enforces or disables the use of system-driven RSA OAEP and PSS computations.This global setting defines who is responsible for performing RSA-OAEP and RSA-PSS computations where the private key is stored in a Windows system store and is exportable.
If set to true, SBB will delegate the computations to Windows via a CryptoAPI call. Otherwise, it will export the key material and perform the computations
using its own OAEP/PSS implementation.
This setting only applies to certificates originating from a Windows system store. |
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UseSystemRandom: Enables or disables the use of the OS PRNG.Use this global property to enable or disable the use of operating system-driven pseudorandom number generation. |
Trappable Errors (Hashfunction Class)
HashFunction Errors
1048577 Invalid parameter value (SB_ERROR_INVALID_PARAMETER) | |
1048578 Class is configured incorrectly (SB_ERROR_INVALID_SETUP) | |
1048579 Operation cannot be executed in the current state (SB_ERROR_INVALID_STATE) | |
1048580 Attempt to set an invalid value to a property (SB_ERROR_INVALID_VALUE) | |
1048581 Certificate does not have its private key loaded (SB_ERROR_NO_PRIVATE_KEY) | |
1048581 Cancelled by the user (SB_ERROR_CANCELLED_BY_USER) |