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SSH Kerberos Authentication Using GSSAPI and SSPI


February, 2006: SSH Kerberos Authentication Using GSSAPI and SSPI

Table 1: SSPI and GSSAPI functions.

SSPI Function Call Description GSSAPI Function Call Description
EnumerateSecurityPackages Allows you to discover the supported security packages. gss_indicate_mechs Returns a list of supported mechanism OIDs.
gss_import_name Converts string format of a name to a normalized binary format.
InitSecurityInterface Retrieves a pointer to a dispatch table after security.dll has been loaded.
AcquireCredentialsHandle Gets a handle to existing credentials of a security principal.
AcceptSecurityContext Server-side call used to create a security context based on a client message. gss_accept_sec_context Accept an inbound (server) security context.
InitializeSecurityContext Client-side call used to authenticate (initialize the security context). gss_init_sec_context Initiates an outbound (client) security context.
DecryptMessage Used for message decryption—not necessary with SSH. gss_unwrap "Decapsulates, decrypts, and verifies the integrity check of a message."
EncryptMessage Used for message encryption—not necessarywith SSH. gss_wrap "Signs, encrypts, and encapsulates a message."
MakeSignature Creates a digital signature based on a security context and a message. gss_get_mic Generates a digital signature (integrity check) over a message.


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