OTPServer Class
Properties Methods Events Config Settings Errors
The OTPServer class checks the validity of one-time passwords.
Syntax
secureblackbox.OTPServer
Remarks
A One-Time Password (OTP) is a password that is valid for only one session or transaction. OTPs were designed to overcome the weaknesses of traditional static passwords such as vulnerability to replay attacks. The OTPServer class can check the validity of HMAC-Based One-Time Passwords (HOTP) and Time-Based One-Time Passwords (TOTP).
Property List
The following is the full list of the properties of the class with short descriptions. Click on the links for further details.
BaseTime | Specifies the TOTP client's base time. |
Delta | Specifies the resynchronization limit. |
FIPSMode | Reserved. |
Users | A database of users containing all the per-user password settings. |
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. |
IsHOTPPasswordValid | Validates a hash-based one-time password. |
IsPasswordValid | Validates an OTP password for a user. |
IsTOTPPasswordValid | Validates a time-based one-time password. |
Reset | Resets the class settings. |
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 | Information about errors during one-time password (OTP) processing. |
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.
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 class. |
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 classes 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 classes 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. |
BaseTime Property (OTPServer Class)
Specifies the TOTP client's base time.
Syntax
public String getBaseTime(); public void setBaseTime(String baseTime);
Default Value
""
Remarks
Specifies the TOTP (Time-based OTP, RFC 6238) server's base time parameter.
Delta Property (OTPServer Class)
Specifies the resynchronization limit.
Syntax
public int getDelta(); public void setDelta(int delta);
Default Value
0
Remarks
This property is used to overcome the asynchronicity between the one-time password (OTP) client and server. For HOTP servers (HMAC-based OTP, RFC 4226), Delta defines the maximum possible deviation of the client's counter value. For TOTP servers (Time-based OTP, RFC 6238), Delta contains the maximum number of time steps the client can be out of synch.
FIPSMode Property (OTPServer Class)
Reserved.
Syntax
public boolean isFIPSMode(); public void setFIPSMode(boolean FIPSMode);
Default Value
False
Remarks
This property is reserved for future use.
Users Property (OTPServer Class)
A database of users containing all the per-user password settings.
Syntax
public UserAccountList getUsers(); public void setUsers(UserAccountList users);
Remarks
Use this property to provide a list of known users to the OTP server.
This property is not available at design time.
Please refer to the UserAccount type for a complete list of fields.Config Method (OTPServer 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 (OTPServer 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 (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. |
IsHOTPPasswordValid Method (OTPServer Class)
Validates a hash-based one-time password.
Syntax
public boolean isHOTPPasswordValid(byte[] keySecret, int passwordLength, int counter, String password);
Remarks
Use this method to validate a hash-based one-time password (HOTP) by using explicit HOTP parameters. For this method to work, no user details need to be provided in Users collection.
IsPasswordValid Method (OTPServer Class)
Validates an OTP password for a user.
Syntax
public boolean isPasswordValid(String username, String password);
Remarks
Use this method to check a one-time Password for a user specified by UserID. The known users' details need to be provided in Users list.
IsTOTPPasswordValid Method (OTPServer Class)
Validates a time-based one-time password.
Syntax
public boolean isTOTPPasswordValid(byte[] keySecret, int passwordLength, int timeInterval, String hashAlgorithm, String password);
Remarks
Use this method to validate a time-based one-time password (TOTP) by using explicit TOTP parameters. For this method to work, no user details need to be provided in Users collection.
Supported hash algorithms:
SB_MAC_ALGORITHM_HMAC_SHA1 | SHA1 | |
SB_MAC_ALGORITHM_HMAC_SHA256 | SHA256 | |
SB_MAC_ALGORITHM_HMAC_SHA512 | SHA512 |
Reset Method (OTPServer Class)
Resets the class settings.
Syntax
public void reset();
Remarks
Reset is a generic method available in every class.
Error Event (OTPServer Class)
Information about errors during one-time password (OTP) processing.
Syntax
public class DefaultOTPServerEventListener implements OTPServerEventListener { ... public void error(OTPServerErrorEvent e) {} ... } public class OTPServerErrorEvent { public int errorCode; public String description; }
Remarks
This event is fired in case of exceptional conditions during OTP checks.
ErrorCode contains an error code and Description contains a textual description of the error.
Notification Event (OTPServer Class)
This event notifies the application about an underlying control flow event.
Syntax
public class DefaultOTPServerEventListener implements OTPServerEventListener { ... public void notification(OTPServerNotificationEvent e) {} ... } public class OTPServerNotificationEvent { 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 class. 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 class, the exact action it is performing, or the document being processed, one or both may be omitted.
UserAccount Type
A container for user account information.
Remarks
UserAccount objects are used to store user account information, such as logins and passwords.
Fields
AssociatedData
byte[]
Default Value: ""
Contains the user's Associated Data when SSH AEAD (Authenticated Encryption with Associated Data) algorithm is used.
BasePath
String
Default Value: ""
Base path for this user in the server's file system.
Certificate
byte[]
Default Value: ""
Contains the user's certificate.
Data
String
Default Value: ""
Contains uninterpreted user-defined data that should be associated with the user account, such as comments or custom settings.
Email
String
Default Value: ""
The user's email address.
HashAlgorithm
String
Default Value: ""
Specifies the hash algorithm used to generate TOTP (Time-based One-Time Passwords) passwords for this user. Three HMAC algorithms are supported, with SHA-1, SHA-256, and SHA-512 digests:
SB_MAC_ALGORITHM_HMAC_SHA1 | SHA1 | |
SB_MAC_ALGORITHM_HMAC_SHA256 | SHA256 | |
SB_MAC_ALGORITHM_HMAC_SHA512 | SHA512 |
IncomingSpeedLimit
int
Default Value: 0
Specifies the incoming speed limit for this user. The value of 0 (zero) means "no limitation".
OtpAlgorithm
int
Default Value: 0
The algorithm used to generate one-time passwords (OTP) for this user, either HOTP (Hash-based OTP) or TOTP (Time-based OTP). In the former case, a value of a dedicated counter is used to generate a unique password, while in the latter the password is generated on the basis of the current time value.
oaHmac | 0 | |
oaTime | 1 |
OTPLen
int
Default Value: 0
Specifies the length of the user's OTP password.
OtpValue
int
Default Value: 0
The user's time interval (TOTP) or Counter (HOTP).
OutgoingSpeedLimit
int
Default Value: 0
Specifies the outgoing speed limit for this user. The value of 0 (zero) means "no limitation".
Password
String
Default Value: ""
The user's authentication password.
SharedSecret
byte[]
Default Value: ""
Contains the user's secret key, which is essentially a shared secret between the client and server.
Shared secrets can be used in TLS-driven protocols, as well as in OTP (where it is called a 'key secret') for generating one-time passwords on one side, and validate them on the other.
SSHKey
byte[]
Default Value: ""
Contains the user's SSH key.
Username
String
Default Value: ""
The registered name (login) of the user.
Constructors
public UserAccount();
Creates a new UserAccount object
Config Settings (OTPServer 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.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 (OTPServer Class)
OTPServer 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) |
25165825 | User not found (SB_ERROR_OTP_USER_NOT_FOUND) |