KRB5_CHECK_TRANSITED(3)

💖 KRB5_CHECK_TRANSITED 💖

okay bestie, gather round, because today we're talking about krb5_check_transited and its little friend group — the realm transit verification + encoding/decoding squad from the Kerberos 5 Library (that's libkrb5, link with -lkrb5). it's giving ✨deep magic✨, but we're gonna make it make sense. no cap.

🌸 NAME 🌸

krb5_check_transited, krb5_check_transited_realms, krb5_domain_x500_decode, krb5_domain_x500_encode — realm transit verification and encoding/decoding functions

📚 LIBRARY 📚

Kerberos 5 Library (libkrb5, -lkrb5)

✨ SYNOPSIS ✨

#include <krb5.h>

krb5_error_code
krb5_check_transited(krb5_context context,
    krb5_const_realm client_realm, krb5_const_realm server_realm,
    krb5_realm *realms, int num_realms, int *bad_realm);

krb5_error_code
krb5_check_transited_realms(krb5_context context,
    const char *const *realms, int num_realms, int *bad_realm);

krb5_error_code
krb5_domain_x500_decode(krb5_context context, krb5_data tr,
    char ***realms, int *num_realms, const char *client_realm,
    const char *server_realm);

krb5_error_code
krb5_domain_x500_encode(char **realms, int num_realms,
    krb5_data *encoding);

🦋 DESCRIPTION 🦋

so krb5_check_transited() is the vibe-checker for the journey from client_realm all the way to server_realm, where realms and num_realms are the realms sitting between them. it's literally checking the path, bestie. and if the function returns an error value, then bad_realm gets set to the exact realm in the list that caused the drama 😭 — the little snitch, the one who ruined it for everyone.

🚨 ok important: krb5_check_transited() is used internally by the KDC and libkrb5 and should NOT be called by client applications. it's not for you, it's for them. respect the boundary 💅

krb5_check_transited_realms() — deprecated, babe. she's old, she's tired, let her rest 🙈.

krb5_domain_x500_encode() and krb5_domain_x500_decode() do the encode/decode thing with realm names in the X500 format — that's the format Kerberos uses to describe the transited realms in krbtgts. encode go brrr, decode un-brrr. iconic behavior honestly 👑

🌈 SEE ALSO 🌈

• krb5(3)
• krb5.conf(5)

and that's the whole page, bestie!! 🫶 this lil gem comes to you from HEIMDAL, dated May 1, 2006 — yeah she's an elder but she still ate, fr fr 💖✨🎀🦋🌸