PGPKeyring Component

Properties   Methods   Events   Config Settings   Errors  

The PGPKeyring component accesses and manages PGP keyring files.

Syntax

nsoftware.SecureBlackbox.PGPKeyring

Remarks

PGPKeyring is used to hold and access PGP keys. It contains information about both public keys and secret keys, which are usually stored in two separate files: "public keyring" and "secret keyring", respectively.

Property List


The following is the full list of the properties of the component with short descriptions. Click on the links for further details.

KeysPGP keys available in the keyring.
PinnedKeyA PGP key that is being manipulated on.
SelectedKeysThe keys matching the selection criteria.

Method List


The following is the full list of the methods of the component with short descriptions. Click on the links for further details.

ConfigThis method sets or retrieves a configuration setting.
DoActionPerforms an additional action.
ExportBytesExports the keyring to a byte array.
ExportToFileExports the keyring to disk.
ExportToStreamExports the keyring to streams.
ImportBytesLoads a key from a byte array.
ImportFromFileLoads a key from a file.
ImportFromStreamLoads a key from a stream.
ImportPinnedImports a pinned secret key to the keyring.
RemoveRemoves the specified key from the keyring.
RemoveByIDRemoves key by its ID.
ResetCreates a new empty keyring.
SelectFilters a selection of keys from the keyring using a template.
UpdatePinnedUpdate a pinned key in the keyring.

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.

ErrorInformation about errors during PGP key management.
NotificationThis 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.

TempPathLocation where the temporary files are stored.
CheckKeyIntegrityBeforeUseEnables or disable private key integrity check before use.
CookieCachingSpecifies whether a cookie cache should be used for HTTP(S) transports.
CookiesGets or sets local cookies for the component.
DefDeriveKeyIterationsSpecifies the default key derivation algorithm iteration count.
EnableClientSideSSLFFDHEEnables or disables finite field DHE key exchange support in TLS clients.
GlobalCookiesGets or sets global cookies for all the HTTP transports.
HttpUserAgentSpecifies the user agent name to be used by all HTTP clients.
LogDestinationSpecifies the debug log destination.
LogDetailsSpecifies the debug log details to dump.
LogFileSpecifies the debug log filename.
LogFiltersSpecifies the debug log filters.
LogFlushModeSpecifies the log flush mode.
LogLevelSpecifies the debug log level.
LogMaxEventCountSpecifies the maximum number of events to cache before further action is taken.
LogRotationModeSpecifies the log rotation mode.
MaxASN1BufferLengthSpecifies the maximal allowed length for ASN.1 primitive tag data.
MaxASN1TreeDepthSpecifies the maximal depth for processed ASN.1 trees.
OCSPHashAlgorithmSpecifies the hash algorithm to be used to identify certificates in OCSP requests.
StaticDNSSpecifies whether static DNS rules should be used.
StaticIPAddress[domain]Gets or sets an IP address for the specified domain name.
StaticIPAddressesGets or sets all the static DNS rules.
TagAllows to store any custom data.
TLSSessionGroupSpecifies the group name of TLS sessions to be used for session resumption.
TLSSessionLifetimeSpecifies lifetime in seconds of the cached TLS session.
TLSSessionPurgeIntervalSpecifies how often the session cache should remove the expired TLS sessions.
UseOwnDNSResolverSpecifies whether the client components should use own DNS resolver.
UseSharedSystemStoragesSpecifies whether the validation engine should use a global per-process copy of the system certificate stores.
UseSystemOAEPAndPSSEnforces or disables the use of system-driven RSA OAEP and PSS computations.
UseSystemRandomEnables or disables the use of the OS PRNG.

Keys Property (PGPKeyring Component)

PGP keys available in the keyring.

Syntax

public PGPKeyList Keys { get; }
Public ReadOnly Property Keys As PGPKeyList

Remarks

This property populates a collection of all pgp keys contained in the keyring.

This property is read-only and not available at design time.

Please refer to the PGPKey type for a complete list of fields.

PinnedKey Property (PGPKeyring Component)

A PGP key that is being manipulated on.

Syntax

public PGPKey PinnedKey { get; set; }
Public Property PinnedKey As PGPKey

Remarks

Use this property to specify a key to perform operations on, such as adding.

This property is not available at design time.

Please refer to the PGPKey type for a complete list of fields.

SelectedKeys Property (PGPKeyring Component)

The keys matching the selection criteria.

Syntax

public PGPKeyList SelectedKeys { get; }
Public ReadOnly Property SelectedKeys As PGPKeyList

Remarks

This property contains all the keys that match the selection filter passed to Select method.

This property is read-only and not available at design time.

Please refer to the PGPKey type for a complete list of fields.

Config Method (PGPKeyring Component)

This method sets or retrieves a configuration setting.

Syntax

public string Config(string configurationString);
Public Function Config(ByVal ConfigurationString As String) As 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 (PGPKeyring Component)

Performs an additional action.

Syntax

public string DoAction(string actionID, string actionParams);
Public Function DoAction(ByVal ActionID As String, ByVal ActionParams As String) As 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;....

ExportBytes Method (PGPKeyring Component)

Exports the keyring to a byte array.

Syntax

public byte[] ExportBytes(bool secret);
Public Function ExportBytes(ByVal Secret As Boolean) As Byte()

Remarks

Use this method to export the keyring to a byte array. PGP software typically uses two files to store keyrings. Use Secret parameter to specify which part of the keyring you would like to export (public or secret).

ExportToFile Method (PGPKeyring Component)

Exports the keyring to disk.

Syntax

public void ExportToFile(string fileName, bool secret);
Public Sub ExportToFile(ByVal FileName As String, ByVal Secret As Boolean)

Remarks

Use this method to export the keyring to disk. PGP software typically uses two files to store keyrings, public and private.

ExportToStream Method (PGPKeyring Component)

Exports the keyring to streams.

Syntax

public void ExportToStream(System.IO.Stream keyringStream, bool secret);
Public Sub ExportToStream(ByVal KeyringStream As System.IO.Stream, ByVal Secret As Boolean)

Remarks

Use this method to export the keyring to streams. PGP software typically uses two files to store keyrings, public and private.

ImportBytes Method (PGPKeyring Component)

Loads a key from a byte array.

Syntax

public void ImportBytes(byte[] keyring);
Public Sub ImportBytes(ByVal Keyring As Byte())

Remarks

Use this method to load a key, either public or secret, from a byte array.

ImportFromFile Method (PGPKeyring Component)

Loads a key from a file.

Syntax

public void ImportFromFile(string keyringFile);
Public Sub ImportFromFile(ByVal KeyringFile As String)

Remarks

Use this method to load a key, either public or secret, from a file.

ImportFromStream Method (PGPKeyring Component)

Loads a key from a stream.

Syntax

public void ImportFromStream(System.IO.Stream keyringStream);
Public Sub ImportFromStream(ByVal KeyringStream As System.IO.Stream)

Remarks

Use this method to load a key, either public or secret, from a stream.

ImportPinned Method (PGPKeyring Component)

Imports a pinned secret key to the keyring.

Syntax

public void ImportPinned();
Public Sub ImportPinned()

Remarks

Use this method to import a key provided via PinnedKey to the keyring. This can be a public or secret key.

Remove Method (PGPKeyring Component)

Removes the specified key from the keyring.

Syntax

public void Remove(int index);
Public Sub Remove(ByVal Index As Integer)

Remarks

Use this method to remove a key from the keyring. Use Index to pass the index of the key to be removed.

RemoveByID Method (PGPKeyring Component)

Removes key by its ID.

Syntax

public void RemoveByID(string keyID);
Public Sub RemoveByID(ByVal KeyID As String)

Remarks

Call this method to remove the specified key from the keyring.

Reset Method (PGPKeyring Component)

Creates a new empty keyring.

Syntax

public void Reset();
Public Sub Reset()

Remarks

Use this method to initialize a new empty keyring.

Select Method (PGPKeyring Component)

Filters a selection of keys from the keyring using a template.

Syntax

public void Select(string filter, bool secretOnly, int maxCount);
Public Sub Select(ByVal Filter As String, ByVal SecretOnly As Boolean, ByVal MaxCount As Integer)

Remarks

Use this method to get a list of keys that satisfy the Filter criteria. The filter should follow the "Name=Value" format, where Name can be one of the following: userid, fp, fingerprint, and keyid.

Set SecretOnly to True to only search for secret keys. MaxCount allows to limit the number of keys returned.

Once the method completes, the keys that match the criteria will be available in SelectedKeys property.

UpdatePinned Method (PGPKeyring Component)

Update a pinned key in the keyring.

Syntax

public void UpdatePinned();
Public Sub UpdatePinned()

Remarks

Use this method to update a key provided via PinnedKey in the keyring. This can be a public or secret key.

Error Event (PGPKeyring Component)

Information about errors during PGP key management.

Syntax

public event OnErrorHandler OnError;

public delegate void OnErrorHandler(object sender, PGPKeyringErrorEventArgs e);

public class PGPKeyringErrorEventArgs : EventArgs {
  public int ErrorCode { get; }
  public string Description { get; }
}
Public Event OnError As OnErrorHandler

Public Delegate Sub OnErrorHandler(sender As Object, e As PGPKeyringErrorEventArgs)

Public Class PGPKeyringErrorEventArgs Inherits EventArgs
  Public ReadOnly Property ErrorCode As Integer
  Public ReadOnly Property Description As String
End Class

Remarks

The event is fired in case of exceptional conditions during key management.

ErrorCode contains an error code and Description contains a textual description of the error.

Notification Event (PGPKeyring Component)

This event notifies the application about an underlying control flow event.

Syntax

public event OnNotificationHandler OnNotification;

public delegate void OnNotificationHandler(object sender, PGPKeyringNotificationEventArgs e);

public class PGPKeyringNotificationEventArgs : EventArgs {
  public string EventID { get; }
  public string EventParam { get; }
}
Public Event OnNotification As OnNotificationHandler

Public Delegate Sub OnNotificationHandler(sender As Object, e As PGPKeyringNotificationEventArgs)

Public Class PGPKeyringNotificationEventArgs Inherits EventArgs
  Public ReadOnly Property EventID As String
  Public ReadOnly Property EventParam As String
End Class

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.

PGPKey Type

This container represents a PGP key.

Remarks

OpenPGP standard supports several types of keys. In our days, a typical OpenPGP keypair actually consists of two cryptographic keys: a primary key and a subkey. The primary key is normally used for signing, while the subkey is used for encryption.

While it is typical for PGP environments to use a primary key/subkey bundle, this is not a must. Sometimes you may come across standalone keys (mainly when dealing with older implementations), as well as whole key trees, each of those carrying a bunch of differently-purposed subkeys bound to the same primary key.

Algorithm-wise, OpenPGP keys also differ. Generally speaking, OpenPGP supports the following public key algorithms: RSA, Elgamal (often incorrectly referred to as DH), DSA, ECDH and ECDSA. When it comes to primary key/subkey bundles, DSA/Elgamal, RSA/RSA and ECDSA/ECDH pairs are typically used. Although there's no restriction on algorithm bundles, and, e.g. a ECDSA/Elgamal key bundle is perfectly possible, such combination is rarely used in practice.

A typical OpenPGP key is associated with some kind of user ID (Username). It is normally represented with a user's e-mail address, while in theory can be any piece of text. The secret part of the OpenPGP keypair is protected with a password (Passphrase).

Fields

BitsInKey
int (read-only)

Default: 2048

Indicates the key length in bits.

CanEncrypt
bool (read-only)

Default: False

Returns True if this key can be used for encryption.

CanSign
bool (read-only)

Default: False

Returns True if this key can be used for signing.

Curve
string (read-only)

Default: ""

Indicates the elliptic curve associated with a EC key.

Supported values:

SB_PGP_CURVE_P256P256
SB_PGP_CURVE_P384P384
SB_PGP_CURVE_P521P521
SB_PGP_CURVE_ED25519ED25519
SB_PGP_CURVE_CURVE25519CURVE25519
SB_PGP_CURVE_BRAINPOOLP256R1BRAINPOOLP256
SB_PGP_CURVE_BRAINPOOLP512R1BRAINPOOLP512

Enabled
bool

Default: False

Enables or disables this key for use in encryption or signing operation.

EncryptionAlgorithm
string (read-only)

Default: "AES128"

Indicates the symmetric algorithm used to encrypt the secret key.

IsPublic
bool (read-only)

Default: False

Returns True if this key is a public key, and False otherwise.

IsSecret
bool (read-only)

Default: False

Returns True if this key is a secret key, and False otherwise.

IsSubkey
bool (read-only)

Default: False

Returns True if this key is a subkey of another key, and False otherwise.

KeyFP
string (read-only)

Default: ""

The 20-byte fingerprint (hash value) of this key.

KeyFP could be used to distinguish two keys with the same KeyID.

KeyID
string (read-only)

Default: ""

Contains a 8-byte key identifier.

It is quite rare that IDs of two keys collide. If that happens, their fingerprints (KeyFP) can be used for distinguish between the keys. Please note that many PGP implementations show only 4 lowest bytes of the KeyID to the user.

Passphrase
string

Default: ""

The key protection password.

PassphraseValid
bool (read-only)

Default: False

Use this property to check whether the specified Passphrase is valid and can be used to unlock the secret key.

PrimaryKeyID
string (read-only)

Default: ""

If this key is a subkey (IsSubkey returns True), this field contains the identifier of the subkey's primary key.

Protection
PGPProtectionTypes (read-only)

Default: 0

Specifies the level of protection applied to the secret key.

Allowed values:

pptNone0Key is not encrypted
pptLow1Only the password hash is used to derive the secret key
pptNormal2Password hash with salt is used to derive the secret key
pptHigh3Hash from multiple passwords and salt are used for key derivation

PublicKeyAlgorithm
string (read-only)

Default: ""

Specifies the asymmetric algorithm of the key.

QBits
int (read-only)

Default: 0

The length of the DSA Q (legitimate range: 160-512).

This parameter corresponds to the hash algorithm used with the key. For example, if the value of Q is 256, SHA-256 will be used.

Timestamp
string (read-only)

Default: ""

Use this property to check the time the key was generated. The date and time are stored and retrieved in Universal Coordinate Time (UTC).

Username
string (read-only)

Default: ""

Specifies the name of the user bound to this key.

The PGP username is typically represented with a full name and an email address, but generally can be any non-empty string.

ValidTo
string (read-only)

Default: "0"

Provide accurate expiration moment indication. This is different to expires property which only contains expiration time in days in old keys.

Version
int (read-only)

Default: 0

Indicates the key version.

The key version refers to the version of the public-key packet format as defined in RFC 4880.

Only four versions are currently allowed here: 3, 4, 5 and 6. It is recommended that all new keys are created with version of 6.

Constructors

public PGPKey();
Public PGPKey()

Creates an empty PGP key object.

public PGPKey(string fileName);
Public PGPKey(ByVal FileName As String)

Create a PGP key object from a key file.

Config Settings (PGPKeyring 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.

PGPKeyring Config Settings

TempPath:   Location where the temporary files are stored.

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.

CookieCaching:   Specifies whether a cookie cache should be used for HTTP(S) transports.

Set this property to enable or disable cookies caching for the component.

Supported values are:

offNo caching (default)
localLocal caching
globalGlobal caching

Cookies:   Gets or sets local cookies for the component.

Use this property to get cookies from the internal cookie storage of the component 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.

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 components 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 components.

LogDestination:   Specifies the debug log destination.

Contains a comma-separated list of values that specifies where debug log should be dumped.

Supported values are:

fileFile
consoleConsole
systemlogSystem Log (supported for Android only)
debuggerDebugger (supported for VCL for Windows and .Net)

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:

timeCurrent time
levelLevel
packagePackage name
moduleModule name
classClass name
methodMethod name
threadidThread Id
contenttypeContent type
contentContent
allAll details

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:

exclude-packageExclude a package specified in the value
exclude-moduleExclude a module specified in the value
exclude-classExclude a class specified in the value
exclude-methodExclude a method specified in the value
include-packageInclude a package specified in the value
include-moduleInclude a module specified in the value
include-classInclude a class specified in the value
include-methodInclude a method specified in the value

LogFlushMode:   Specifies the log flush mode.

Use this property to set the log flush mode. The following values are defined:

noneNo flush (caching only)
immediateImmediate flush (real-time logging)
maxcountFlush cached entries upon reaching LogMaxEventCount entries in the cache.

LogLevel:   Specifies the debug log level.

Use this property to provide the desired debug log level.

Supported values are:

noneNone (by default)
fatalSevere errors that cause premature termination.
errorOther runtime errors or unexpected conditions.
warningUse of deprecated APIs, poor use of API, 'almost' errors, other runtime situations that are undesirable or unexpected, but not necessarily "wrong".
infoInteresting runtime events (startup/shutdown).
debugDetailed information on flow of through the system.
traceMore detailed information.

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.

LogRotationMode:   Specifies the log rotation mode.

Use this property to set the log rotation mode. The following values are defined:

noneNo rotation
deleteolderDelete older entries from the cache upon reaching LogMaxEventCount
keepolderKeep older entries in the cache upon reaching LogMaxEventCount (newer entries are discarded)

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 component. Works only if UseOwnDNSResolver is set to true.

Supported values are:

noneNo static DNS rules (default)
localLocal static DNS rules
globalGlobal static DNS rules

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 component) 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 component is set to "local", the property returns/restores the rules from/to the internal storage of the component. If StaticDNS of the component 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.

TLSSessionGroup:   Specifies the group name of TLS sessions to be used for session resumption.

Use this property to limit the search of chached TLS sessions to the specified group. Sessions from other groups will be ignored. By default, all sessions are cached with an empty group name and available to all the components.

TLSSessionLifetime:   Specifies lifetime in seconds of the cached TLS session.

Use this property to specify how much time the TLS session should be kept in the session cache. After this time, the session expires and will be automatically removed from the cache. Default value is 300 seconds (5 minutes).

TLSSessionPurgeInterval:   Specifies how often the session cache should remove the expired TLS sessions.

Use this property to specify the time interval of purging the expired TLS sessions from the session cache. Default value is 60 seconds (1 minute).

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.

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 (PGPKeyring Component)

PGPKeyring 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)
27262977   The file was not found (SB_ERROR_PGP_FILE_NOT_EXISTS)
27262978   Invalid signing key (SB_ERROR_PGP_INVALID_KEY)
27262980   No secret key is available (SB_ERROR_PGP_NO_SECRET_KEY)
27262982   The operation is not supported on a subkey (SB_ERROR_PGP_OPERATION_ON_SUBKEY)