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Diffstat (limited to 'src/include/libpq/auth.h')
| -rw-r--r-- | src/include/libpq/auth.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/include/libpq/auth.h b/src/include/libpq/auth.h index 9157dbe6092..902c5f6de32 100644 --- a/src/include/libpq/auth.h +++ b/src/include/libpq/auth.h @@ -16,6 +16,22 @@ #include "libpq/libpq-be.h" +/* + * Maximum accepted size of GSS and SSPI authentication tokens. + * We also use this as a limit on ordinary password packet lengths. + * + * Kerberos tickets are usually quite small, but the TGTs issued by Windows + * domain controllers include an authorization field known as the Privilege + * Attribute Certificate (PAC), which contains the user's Windows permissions + * (group memberships etc.). The PAC is copied into all tickets obtained on + * the basis of this TGT (even those issued by Unix realms which the Windows + * realm trusts), and can be several kB in size. The maximum token size + * accepted by Windows systems is determined by the MaxAuthToken Windows + * registry setting. Microsoft recommends that it is not set higher than + * 65535 bytes, so that seems like a reasonable limit for us as well. + */ +#define PG_MAX_AUTH_TOKEN_LENGTH 65535 + extern PGDLLIMPORT char *pg_krb_server_keyfile; extern PGDLLIMPORT bool pg_krb_caseins_users; extern PGDLLIMPORT bool pg_gss_accept_delegation; |