The Generic Security Service Application Program Interface (GSSAPI, also GSS- API) is an . Sun Microsystems (). “GSS-API Programming Guide”. The GSSAPI (Generic Security Services API) allows applications to communicate securely using Kerberos 5 or other security mechanisms. We recommend. The Secure Shell protocol supports Kerberos authentication via GSSAPI (Generic Security Services Application Programming Interface). Advantages of using.

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The anonymous principal is used, allowing a client to authenticate to a server without asserting a particular identity which may or may not be allowed by a particular server or Kerberos realm.

I dont know if the windows domain login is enabled for pkinit.

Retrieved from ” https: The value is ignored. Instead, security-service vendors provide GSSAPI implementations – usually in the form of libraries installed with their security software. A serialized credential should not be trusted if it originates from a source with lower privileges than the importer, as it may contain references to external credential cache, keytab, or replay cache resources not accessible to the originator.

If no existing tickets are available for the desired name, but the name has an entry in the default client keytabthe krb5 mechanism will acquire initial tickets for the name using the default client keytab. GSSAPI tokens can usually travel over an insecure network as the mechanisms provide inherent message security. Note In MIT krb5 versions prior to 1.

Yes, I believe I need to implement my own server-side component to do the authentication, so it’s a programming question.

From Wikipedia, the free encyclopedia. The only guides I’ve found so far are very low-level protocol descriptions or server configuration guides for admins Sign up or log in Sign up using Google.

Sign up using Email and Password. The following name types are supported by the krb5 mechanism: Post as a guest Name. A serialized credential may contain secret information such as ticket session keys. The hostname will be canonicalized using forward name resolution, and possibly also using reverse name resolution depending on the value of the rdns variable in [libdefaults].


The following name types are supported by the krb5 mechanism:. Limitations of the GSSAPI include that it standardizes only authenticationand not authorizationand that it assumes a client—server architecture.

These name types may work with mechanisms other than krb5, but will have different interpretations in those mechanisms. This is the recommended approach if the server application has no specific requirements to the contrary. Serializing a credential does not destroy it. Do you know if this is a krb library-specific thing, or can putty somehow use this too?

If there are no existing tickets for the chosen principal, but it is present in the default client keytab, the krb5 mechanism will acquire initial tickets using the keytab. The value is treated as an unparsed principal name string, as above.

Because of this, a serialized krb5 credential can only be imported by a process with similar privileges to the exporter. The value should be a principal name string.

Kerberos (GSSAPI) Authentication

But there are some kinit versions support pkinit. After the exchange of some number of tokens, the GSSAPI implementations at both ends inform their local application that a security context has been established. Probably you are progrmaming for kerberos with pkinit support.

In this case, the contents of the credential cache are serialized, so that the resulting ghide may be imported even if the original memory credential cache no longer exists. The application must pad the DATA buffer to a multiple of 16 bytes as no padding or trailer buffer is used. As above, but the value is a decimal string representation of the uid. This facility might, for instance, try to choose existing tickets for a client principal in the same realm as the target service.

DATA buffers must be provided in the iov list so that padding length can be computed correctly, but the output buffers need not be initialized. The client and guixe sides of the application are written to convey the tokens given to them by their gsaspi GSSAPI implementations. A krb5 GSSAPI credential may contain references to a credential cache, a client keytab, an acceptor keytab, and a replay cache. The calling application must take care to protect the serialized credential when communicating it over an insecure channel or to an untrusted party.


This is the most common way to name target services when initiating a security context, and is the most likely name type to work across multiple mechanisms. I’m looking at a way of authenticating users connecting to an SSH daemon.

The serialization format does not protect this information from eavesdropping or tampering. As with other GSSAPI serialization functions, gssapi extensions are only intended to work with a matching implementation on the other side; they do not serialize credentials in guude standardized format. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website progfamming subject to these policies.

Articles lacking in-text citations from October All articles lacking in-text citations Pages using RFC magic links. The memory pointed to by the buffers is not required to be contiguous or in any particular order.

If a hostname is specified, it will be canonicalized using forward name resolution, and possibly also using reverse name resolution depending on the value of guied rdns variable in [libdefaults].

linux – Server side of GSSAPI for sshd and private key authentication – Stack Overflow

On Unix-like systems, the username of the uid is looked up in the system user database and the resulting username is parsed as a principal name. Views Read Edit View history.

Contents gujde next index Gswapi feedback. Once a security context is established, sensitive application messages can be wrapped encrypted by the GSSAPI for secure communication between client and server. Note If a hostname is specified, it will be canonicalized using forward name resolution, and possibly also using reverse name resolution depending on the value of the rdns variable in [libdefaults]. Stack Overflow works best with JavaScript enabled. If the input name contains gseapi a service and a hostnameclients will be allowed to authenticate to any host-based principal for the named service and hostname, regardless of realm.

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