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• Python-GSSAPI

High-Level API — Python-GSSAPI 1.9.0 documentation

The high-level API contains three main classes for interacting with GSSAPI, representing the primary abstractions that GSSAPI provides: Name, Credentials, and SecurityContext.

Note

Classes in the high-level API inherit from the corresponding classes in the low-level API, and thus may be passed in to low-level API functions.

Warning

All methods in both the high-level and low-level APIs may throw the generic GSSError exception.

class Name(base: Name | bytes | str | None = None, name_type: OID | None = None, token: bytes | None = None, composite: bool = False)[source]

A GSSAPI Name

This class represents a GSSAPI name which may be used with and/or returned by other GSSAPI methods.

It inherits from the low-level GSSAPI Name class, and thus may used with both low-level and high-level API methods.

This class may be pickled and unpickled, as well as copied.

The str and bytes methods may be used to retrieve the text of the name.

Note

Name strings will be automatically converted to and from unicode strings as appropriate. If a method is listed as returning a str object, it will return a unicode string.

The encoding used will be python-gssapi’s current encoding, which defaults to UTF-8.

The constructor can be used to “import” a name from a human readable representation, or from a token, and can also be used to convert a low-level gssapi.raw.names.Name object into a high-level object.

If a Name object from the low-level API is passed as the base argument, it will be converted into a high-level object.

If the token argument is used, the name will be imported using the token. If the token was exported as a composite token, pass composite=True.

Otherwise, a new name will be created, using the base argument as the human-readable string and the name_type argument to denote the name type.

Raises:

• BadNameTypeError –

• BadNameError –

• BadMechanismError –

display_as(name_type: OID) → str[source]

Display this name as the given name type.

This method attempts to display the current Name using the syntax of the given NameType, if possible.

Warning

In MIT krb5 versions below 1.13.3, this method can segfault if the name was not originally created with a name_type that was not None (even in cases when a name_type is later “added”, such as via canonicalize()). Do not use this method unless you are sure the above conditions can never happen in your code.

Warning

In addition to the above warning, current versions of MIT krb5 do not actually fully implement this method, and it may return incorrect results in the case of canonicalized names.

requires the RFC 6680 extension

Parameters:

name_type (OID) – the NameType to use to display the given name

Returns:

the displayed name

Return type:

str

Raises:

OperationUnavailableError –

property name_type: OID | None

The NameType of this name

export(composite: bool = False) → bytes[source]

Export this name as a token.

This method exports the name into a byte string which can then be imported by using the token argument of the constructor.

Parameters:

composite (bool) – whether or not use to a composite token – requires the RFC 6680 extension

Returns:

the exported name in token form

Return type:

bytes

Raises:

• MechanismNameRequiredError –

• BadNameTypeError –

• BadNameError –

canonicalize(mech: OID) → Name[source]

Canonicalize a name with respect to a mechanism.

This method returns a new Name that is canonicalized according to the given mechanism.

Parameters:

mech (OID) – the MechType to use

Returns:

the canonicalized name

Return type:

Name

Raises:

• BadMechanismError –

• BadNameTypeError –

• BadNameError –

property is_mech_name: bool

Whether or not this name is a mechanism name (requires the RFC 6680 extension)

property mech: OID

The mechanism associated with this name (requires the RFC 6680 extension)

property attributes: MutableMapping | None

The attributes of this name (requires the RFC 6680 extension)

The attributes are presenting in the form of a MutableMapping (a dict-like object).

Retrieved values will always be in the form of frozenset.

When assigning values, if iterables are used, they be considered to be the set of values for the given attribute. If a non-iterable is used, it will be considered a single value, and automatically wrapped in an iterable.

Note

String types (includes bytes) are not considered to be iterables in this case.

class Credentials(base: Creds | None = None, token: bytes | None = None, name: Name | None = None, lifetime: int | None = None, mechs: Iterable[OID] | None = None, usage: str = 'both', store: Dict[bytes | str, bytes | str] | None = None)[source]

GSSAPI Credentials

This class represents a set of GSSAPI credentials which may be used with and/or returned by other GSSAPI methods.

It inherits from the low-level GSSAPI Creds class, and thus may used with both low-level and high-level API methods.

If your implementation of GSSAPI supports the credentials import-export extension, you may pickle and unpickle this object.

The constructor either acquires or imports a set of GSSAPI credentials.

If the base argument is used, an existing Creds object from the low-level API is converted into a high-level object.

If the token argument is used, the credentials are imported using the token, if the credentials import-export extension is supported (requires the cred_imp_exp extension).

Otherwise, the credentials are acquired as per the acquire() method.

Raises:

• BadMechanismError –

• BadNameTypeError –

• BadNameError –

• ExpiredCredentialsError –

• MissingCredentialsError –

property name: Name

Get the name associated with these credentials

property lifetime: int

Get the remaining lifetime of these credentials, in seconds

property mechs: Set[OID]

Get the mechanisms for these credentials

property usage: str

Get the usage (initiate, accept, or both) of these credentials

classmethod acquire(name: Name | None = None, lifetime: int | None = None, mechs: Iterable[OID] | None = None, usage: str = 'both', store: Dict[bytes | str, bytes | str] | None = None) → AcquireCredResult[source]

Acquire GSSAPI credentials

This method acquires credentials. If the store argument is used, the credentials will be acquired from the given credential store (if supported). Otherwise, the credentials are acquired from the default store.

The credential store information is a dictionary containing mechanisms-specific keys and values pointing to a credential store or stores.

Using a non-default store requires support for the credentials store extension.

Parameters:

• name (Name) – the name associated with the credentials, or None for the default name

• lifetime (int) – the desired lifetime of the credentials in seconds, or None for indefinite

• mechs (list) – the desired MechType OIDs to be used with the credentials, or None for the default set

• usage (str) – the usage for the credentials – either ‘both’, ‘initiate’, or ‘accept’

• store (dict) – the credential store information pointing to the credential store from which to acquire the credentials, or None for the default store (requires the cred_store extension)

Returns:

the acquired credentials and information about them

Return type:

AcquireCredResult

Raises:

• BadMechanismError –

• BadNameTypeError –

• BadNameError –

• ExpiredCredentialsError –

• MissingCredentialsError –

store(store: Dict[bytes | str, bytes | str] | None = None, usage: str = 'both', mech: OID | None = None, overwrite: bool = False, set_default: bool = False) → StoreCredResult[source]

Store these credentials into the given store

This method stores the current credentials into the specified credentials store. If the default store is used, support for RFC 5588 is required. Otherwise, support for the credentials store extension is required.

requires the RFC 5588 extension or requires the cred_store extension

Parameters:

• store (dict) – the store into which to store the credentials, or None for the default store.

• usage (str) – the usage to store the credentials with – either ‘both’, ‘initiate’, or ‘accept’

• mech (OID) – the MechType to associate with the stored credentials

• overwrite (bool) – whether or not to overwrite existing credentials stored with the same name, etc

• set_default (bool) – whether or not to set these credentials as the default credentials for the given store.

Returns:

the results of the credential storing operation

Return type:

StoreCredResult

Raises:

• GSSError –

• ExpiredCredentialsError –

• MissingCredentialsError –

• OperationUnavailableError –

• DuplicateCredentialsElementError –

impersonate(name: Name | None = None, lifetime: int | None = None, mechs: Iterable[OID] | None = None, usage: str = 'initiate') → Credentials[source]

Impersonate a name using the current credentials

This method acquires credentials by impersonating another name using the current credentials.

requires the s4u extension

Parameters:

• name (Name) – the name to impersonate

• lifetime (int) – the desired lifetime of the new credentials in seconds, or None for indefinite

• mechs (list) – the desired MechType OIDs for the new credentials

• usage (str) – the desired usage for the new credentials – either ‘both’, ‘initiate’, or ‘accept’. Note that some mechanisms may only support ‘initiate’.

Returns:

the new credentials impersonating the given name

Return type:

Credentials

inquire(name: bool = True, lifetime: bool = True, usage: bool = True, mechs: bool = True) → InquireCredResult[source]

Inspect these credentials for information

This method inspects these credentials for information about them.

Parameters:

• name (bool) – get the name associated with the credentials

• lifetime (bool) – get the remaining lifetime for the credentials

• usage (bool) – get the usage for the credentials

• mechs (bool) – get the mechanisms associated with the credentials

Returns:

the information about the credentials, with None used when the corresponding argument was False

Return type:

InquireCredResult

Raises:

• MissingCredentialsError –

• InvalidCredentialsError –

• ExpiredCredentialsError –

inquire_by_mech(mech: OID, name: bool = True, init_lifetime: bool = True, accept_lifetime: bool = True, usage: bool = True) → InquireCredByMechResult[source]

Inspect these credentials for per-mechanism information

This method inspects these credentials for per-mechanism information about them.

Parameters:

• mech (OID) – the mechanism for which to retrieve the information

• name (bool) – get the name associated with the credentials

• init_lifetime (bool) – get the remaining initiate lifetime for the credentials in seconds

• accept_lifetime (bool) – get the remaining accept lifetime for the credentials in seconds

• usage (bool) – get the usage for the credentials

Returns:

the information about the credentials, with None used when the corresponding argument was False

Return type:

InquireCredByMechResult

add(name: Name, mech: OID, usage: str = 'both', init_lifetime: int | None = None, accept_lifetime: int | None = None, impersonator: Creds | None = None, store: Dict[bytes | str, bytes | str] | None = None) → Credentials[source]

Acquire more credentials to add to the current set

This method works like acquire(), except that it adds the acquired credentials for a single mechanism to a copy of the current set, instead of creating a new set for multiple mechanisms. Unlike acquire(), you cannot pass None desired name or mechanism.

If the impersonator argument is used, the credentials will impersonate the given name using the impersonator credentials (requires the s4u extension).

If the store argument is used, the credentials will be acquired from the given credential store (requires the cred_store extension). Otherwise, the credentials are acquired from the default store.

The credential store information is a dictionary containing mechanisms-specific keys and values pointing to a credential store or stores.

Note that the store argument is not compatible with the impersonator argument.

Parameters:

• name (Name) – the name associated with the credentials

• mech (OID) – the desired MechType to be used with the credentials

• usage (str) – the usage for the credentials – either ‘both’, ‘initiate’, or ‘accept’

• init_lifetime (int) – the desired initiate lifetime of the credentials in seconds, or None for indefinite

• accept_lifetime (int) – the desired accept lifetime of the credentials in seconds, or None for indefinite

• impersonator (Credentials) – the credentials to use to impersonate the given name, or None to not acquire normally (requires the s4u extension)

• store (dict) – the credential store information pointing to the credential store from which to acquire the credentials, or None for the default store (requires the cred_store extension)

Returns:

the credentials set containing the current credentials and the newly acquired ones.

Return type:

Credentials

Raises:

• BadMechanismError –

• BadNameTypeError –

• BadNameError –

• DuplicateCredentialsElementError –

• ExpiredCredentialsError –

• MissingCredentialsError –

export() → bytes[source]

Export these credentials into a token

This method exports the current credentials to a token that can then be imported by passing the token argument to the constructor.

This is often used to pass credentials between processes.

requires the cred_imp_exp extension

Returns:

the exported credentials in token form

Return type:

bytes

class SecurityContext(base: SecurityContext | None = None, token: bytes | None = None, name: Name | None = None, creds: Credentials | None = None, lifetime: int | None = None, flags: int | None = None, mech: OID | None = None, channel_bindings: ChannelBindings | None = None, usage: str | None = None)[source]

A GSSAPI Security Context

This class represents a GSSAPI security context that may be used with and/or returned by other GSSAPI methods.

It inherits from the low-level GSSAPI SecurityContext class, and thus may used with both low-level and high-level API methods.

This class may be pickled and unpickled (the attached delegated credentials object will not be preserved, however).

The constructor creates a new security context, but does not begin the initiate or accept process.

If the base argument is used, an existing SecurityContext object from the low-level API is converted into a high-level object.

If the token argument is passed, the security context is imported using the token.

Otherwise, a new security context is created.

If the usage argument is not passed, the constructor will attempt to detect what the appropriate usage is based on either the existing security context (if base or token are used) or the argument set.

For a security context of the initiate usage, the name argument must be used, and the creds, mech, flags, lifetime, and channel_bindings arguments may be used as well.

For a security context of the accept usage, the creds and channel_bindings arguments may optionally be used.

get_signature(message: bytes) → bytes[source]

Calculate the signature for a message.

This method calculates the signature (called a MIC) for the given message, which may be then used with verify_signature() to confirm the validity of the signature. This is useful if you wish to transmit the message signature and message in your own format.

Parameters:

message (bytes) – the input message

Returns:

the message signature

Return type:

bytes

Raises:

• ExpiredContextError –

• MissingContextError –

• BadQoPError –

verify_signature(message: bytes, mic: bytes) → int[source]

Verify the signature for a message.

This method verifies that a signature (generated by get_signature() is valid for the given message.

If the signature is valid, the method will return. Otherwise, it will raise an error.

Parameters:

• message (bytes) – the message

• mic (bytes) – the signature to verify

Returns:

the QoP used.

Return type:

int

Raises:

• BadMICError – the signature was not valid

• InvalidTokenError –

• DuplicateTokenError –

• ExpiredTokenError –

• TokenTooLateError –

• TokenTooEarlyError –

• ExpiredContextError –

• MissingContextError –

wrap(message: bytes, encrypt: bool) → WrapResult[source]

Wrap a message, optionally with encryption

This wraps a message, signing it and optionally encrypting it.

Parameters:

• message (bytes) – the message to wrap

• encrypt (bool) – whether or not to encrypt the message

Returns:

the wrapped message and details about it (e.g. whether encryption was used succesfully)

Return type:

WrapResult

Raises:

• ExpiredContextError –

• MissingContextError –

• BadQoPError –

unwrap(message: bytes) → UnwrapResult[source]

Unwrap a wrapped message.

This method unwraps/unencrypts a wrapped message, verifying the signature along the way.

Parameters:

message (bytes) – the message to unwrap/decrypt

Returns:

the unwrapped message and details about it (e.g. wheter encryption was used)

Return type:

UnwrapResult

Raises:

• InvalidTokenError –

• BadMICError –

• DuplicateTokenError –

• ExpiredTokenError –

• TokenTooLateError –

• TokenTooEarlyError –

• ExpiredContextError –

• MissingContextError –

encrypt(message: bytes) → bytes[source]

Encrypt a message.

This method wraps and encrypts a message, similarly to wrap(). The difference is that encryption is always used, and the method will raise an exception if this is not possible. Additionally, this method simply returns the encrypted message directly.

Parameters:

message (bytes) – the message to encrypt

Returns:

the encrypted message

Return type:

bytes

Raises:

• EncryptionNotUsed – the encryption could not be used

• ExpiredContextError –

• MissingContextError –

• BadQoPError –

decrypt(message: bytes) → bytes[source]

Decrypt a message.

This method decrypts and unwraps a message, verifying the signature along the way, similarly to unwrap(). The difference is that this method will raise an exception if encryption was established by the context and not used, and simply returns the decrypted message directly.

Parameters:

message (bytes) – the encrypted message

Returns:

the decrypted message

Return type:

bytes

Raises:

• EncryptionNotUsed – encryption was expected, but not used

• InvalidTokenError –

• BadMICError –

• DuplicateTokenError –

• ExpiredTokenError –

• TokenTooLateError –

• TokenTooEarlyError –

• ExpiredContextError –

• MissingContextError –

get_wrap_size_limit(desired_output_size: int, encrypted: bool = True) → int[source]

Calculate the maximum message size for a given wrapped message size.

This method calculates the maximum input message size for a given maximum wrapped/encrypted message size.

Parameters:

• desired_output_size (int) – the maximum output message size

• encrypted (bool) – whether or not encryption should be taken into account

Returns:

the maximum input message size

Return type:

int

Raises:

• MissingContextError –

• ExpiredContextError –

• BadQoPError –

process_token(token: bytes) → None[source]

Process an output token asynchronously.

This method processes an output token even when the security context was not expecting it.

Warning

This method is deprecated.

Parameters:

token (bytes) – the token to process

Raises:

• InvalidTokenError –

• MissingContextError –

export() → bytes[source]

Export a security context.

This method exports a security context, allowing it to be passed between processes.

Returns:

the exported security context

Return type:

bytes

Raises:

• ExpiredContextError –

• MissingContextError –

• OperationUnavailableError –

property lifetime: int

The amount of time for which this context remains valid

property delegated_creds: Credentials | None

The credentials delegated from the initiator to the acceptor

Warning

This value will not be preserved across picklings. These should be separately exported and transferred.

property initiator_name: Any

The Name of the initiator of this context

property target_name: Any

The Name of the target of this context

property mech: Any

The mechanism (MechType) in use by this context

property actual_flags: Any

The flags set on this context

property locally_initiated: Any

Whether this context was locally intiated

property complete: bool

Whether negotiation for this context has been completed

step(token: bytes | None = None) → bytes | None[source]

Perform a negotation step.

This method performs a negotiation step based on the usage type of this context. If __DEFER_STEP_ERRORS__ is set to True on the class, this method will return a token, even when exceptions would be thrown. The generated exception will be thrown on the next method call or property lookup on the context. This is the default behavior.

This method should be used in a while loop, as such:

input_token = None
try:
    while not ctx.complete:
        output_token = ctx.step(input_token)
        if not output_token:
            break
        input_token = send_and_receive(output_token)
except GSSError as e:
     handle_the_issue()

Tip

Disabling __DEFER_STEP_ERRORS__ is rarely necessary. When this method is used in a loop (as above), __DEFER_STEP_ERRORS__ will ensure that you always send an error token when it’s available, keeping the other end of the security context updated with the status of the negotiation.

Parameters:

token (bytes) – the input token from the other participant’s step

Returns:

the output token to send to the other participant

Return type:

bytes

Raises:

• InvalidTokenError –

• InvalidCredentialsError –

• MissingCredentialsError –

• ExpiredCredentialsError –

• BadChannelBindingsError –

• BadMICError –

• ExpiredTokenError – (initiate only)

• DuplicateTokenError –

• MissingContextError –

• BadNameTypeError – (initiate only)

• BadNameError – (initiate only)

• BadMechanismError –

The following enumerations from the low-level API are also used with the high-level API. For convenience, they are imported in the high-level API gssapi module:

class NameType[source]

Bases: object

anonymous = <OID 1.3.6.1.5.6.3>

composite_export = <OID 1.3.6.1.5.6.6>

export = <OID 1.3.6.1.5.6.4>

hostbased_service = <OID 1.2.840.113554.1.2.1.4>

kerberos_principal = <OID 1.2.840.113554.1.2.2.1>

krb5_nt_principal_name = <OID 1.2.840.113554.1.2.2.1>

machine_uid = <OID 1.2.840.113554.1.2.1.2>

string_uid = <OID 1.2.840.113554.1.2.1.3>

user = <OID 1.2.840.113554.1.2.1.1>

class MechType[source]

Bases: object

kerberos = <OID 1.2.840.113554.1.2.2>

class RequirementFlag(*values)[source]

Bases: IntEnum

The ok_as_delegate flag corresponds to the C level flag GSS_C_DELEG_POLICY_FLAG. This flag is similar to delegate_to_peer except it only delegates if the KDC delegation policies for the service principal allow it to use delegation. This is typically used on Microsoft domain environments to control whether constrained or unconstrained delegation is allowed for a service principal. By setting this flag, the delegation process follows the same behaviour as delegation on SSPI/Windows.

Here are the four cases when either of these flags are set or not.

Neither flag set

No delegation occurs.

delegate_to_peer

Always try to delegate regardless of the KDC delegation policies. delegate_to_peer is set in the return flags if successful.

ok_as_delegate

Try to delegate but only if the KDC trusts the service principal for delegation. delegate_to_peer and ok_as_delegate are set in the return flags if successful.

delegate_to_peer | ok_as_delegate

Acts like delegate_to_peer being set but will also set ok_as_delegate in the return flags if the service principal was trusted for delegation by the KDC.

class AddressType(*values)[source]

Bases: IntEnum

Similarly, there are a couple classes from the low-level API that are imported into the high-level API module. These classes are less likely to be used directly by a user, but are returned by several methods:

class OID[source]

class IntEnumFlagSet(enum, flags=None)[source]

Bases: GenericFlagSet

The high-level API can raise all of the exceptions that the low-level API can raise in addition to several other high-level-specific exceptions:

exception GSSError(maj_code, min_code, *args, **kwargs)[source]

Bases: Exception

MESSAGE = 'Major ({maj_stat}): {maj_str}, Minor ({min_stat}): {min_str}'

gen_message()[source]

get_all_statuses(code, is_maj)[source]

exception GeneralError(minor_message: str, **kwargs: str)[source]

Bases: Exception

A General High-Level API Error

MAJOR_MESSAGE = 'General error'

FMT_STR = '{maj}: {min}.'

exception UnknownUsageError(minor_message: str, **kwargs: str)[source]

Bases: GeneralError

An Error indicating an unknown usage type

MAJOR_MESSAGE = 'Unable to determine {obj} usage'

exception EncryptionNotUsed(minor_message: str, unwrapped_message: bytes | None = None, **kwargs: str)[source]

Bases: GeneralError

An Error indicating that encryption was requested, but not used

MAJOR_MESSAGE = 'Confidentiality was requested, but not used'

exception BadChannelBindingsError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 262144

exception BadMICError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 393216

exception BadMechanismError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 65536

exception BadNameError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 131072

exception BadNameTypeError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 196608

exception BadQoPError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 917504

exception BadStatusError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 327680

exception ContextReadError(maj_code, min_code, *args, **kwargs)[source]

Bases: ParameterReadError, MissingContextError

exception ContextWriteError(maj_code, min_code, *args, **kwargs)[source]

Bases: ParameterWriteError, MissingContextError

exception CredentialsReadError(maj_code, min_code, *args, **kwargs)[source]

Bases: ParameterReadError, MissingCredentialsError

exception CredentialsWriteError(maj_code, min_code, *args, **kwargs)[source]

Bases: ParameterWriteError, MissingCredentialsError

exception DuplicateCredentialsElementError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 1114112

exception DuplicateTokenError(maj_code, min_code, *args, **kwargs)[source]

Bases: SupplementaryError

SUPPLEMENTARY_CODE = 2

exception ExpiredContextError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 786432

exception ExpiredCredentialsError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 720896

exception ExpiredTokenError(maj_code, min_code, *args, **kwargs)[source]

Bases: SupplementaryError

SUPPLEMENTARY_CODE = 4

exception InvalidCredentialsError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 655360

exception InvalidTokenError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 589824

exception MalformedParameterError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

CALLING_CODE = 50331648

exception MechanismNameRequiredError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 1179648

exception MissingContextError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 524288

exception MissingCredentialsError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 458752

exception NameReadError(maj_code, min_code, *args, **kwargs)[source]

Bases: ParameterReadError, BadNameError

exception NameTypeReadError(maj_code, min_code, *args, **kwargs)[source]

Bases: ParameterReadError, BadNameTypeError

exception OperationUnavailableError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

ROUTINE_CODE = 1048576

exception ParameterReadError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

CALLING_CODE = 16777216

exception ParameterWriteError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

CALLING_CODE = 33554432

exception SupplementaryError(maj_code, min_code, *args, **kwargs)[source]

Bases: GSSError

exception TokenOutOfSequenceError(maj_code, min_code, *args, **kwargs)[source]

Bases: SupplementaryError

exception TokenReadError(maj_code, min_code, *args, **kwargs)[source]

Bases: ParameterReadError, InvalidTokenError

exception TokenTooEarlyError(maj_code, min_code, *args, **kwargs)[source]

Bases: TokenOutOfSequenceError

SUPPLEMENTARY_CODE = 16

exception TokenTooLateError(maj_code, min_code, *args, **kwargs)[source]

Bases: TokenOutOfSequenceError

SUPPLEMENTARY_CODE = 8

Bases: GSSError

ROUTINE_CODE = 983040

set_encoding(enc: str) → None[source]

Sets the current encoding used for strings

This value is used to encode and decode string values like names.

Parameters:

enc – the encoding to use

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