/usr/include/gss/krb5.h is in libgss-dev 1.0.3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | /* gss/krb5.h --- Header file for Kerberos 5 GSS-API mechanism.
 * Copyright (C) 2003-2014 Simon Josefsson
 *
 * This file is part of the Generic Security Service (GSS).
 *
 * GSS is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * GSS is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
 * License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GSS; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA 02110-1301, USA.
 *
 */
/*
 * This file contains official Kerberos V5 GSS-API mechanism related
 * prototypes defined as in RFC 1964 and RFC 4121.  For GNU GSS
 * specific extensions, see gss/krb5-ext.h.
 *
 */
#ifndef GSS_KRB5_H
# define GSS_KRB5_H
/* 4.1.1. Non-Kerberos-specific codes */
#define GSS_KRB5_S_G_BAD_SERVICE_NAME 1
/* "No @ in SERVICE-NAME name string" */
#define GSS_KRB5_S_G_BAD_STRING_UID 2
/* "STRING-UID-NAME contains nondigits" */
#define GSS_KRB5_S_G_NOUSER 3
/* "UID does not resolve to username" */
#define GSS_KRB5_S_G_VALIDATE_FAILED 4
/* "Validation error" */
#define GSS_KRB5_S_G_BUFFER_ALLOC 5
/* "Couldn't allocate gss_buffer_t data" */
#define GSS_KRB5_S_G_BAD_MSG_CTX 6
/* "Message context invalid" */
#define GSS_KRB5_S_G_WRONG_SIZE 7
/* "Buffer is the wrong size" */
#define GSS_KRB5_S_G_BAD_USAGE 8
/* "Credential usage type is unknown" */
#define GSS_KRB5_S_G_UNKNOWN_QOP 9
/* "Unknown quality of protection specified" */
/* 4.1.2. Kerberos-specific-codes */
#define GSS_KRB5_S_KG_CCACHE_NOMATCH 10
/* "Principal in credential cache does not match desired name" */
#define GSS_KRB5_S_KG_KEYTAB_NOMATCH 11
/* "No principal in keytab matches desired name" */
#define GSS_KRB5_S_KG_TGT_MISSING 12
/* "Credential cache has no TGT" */
#define GSS_KRB5_S_KG_NO_SUBKEY 13
/* "Authenticator has no subkey" */
#define GSS_KRB5_S_KG_CONTEXT_ESTABLISHED 14
/* "Context is already fully established" */
#define GSS_KRB5_S_KG_BAD_SIGN_TYPE 15
/* "Unknown signature type in token" */
#define GSS_KRB5_S_KG_BAD_LENGTH 16
/* "Invalid field length in token" */
#define GSS_KRB5_S_KG_CTX_INCOMPLETE 17
/* "Attempt to use incomplete security context" */
/*
 * This name form shall be represented by the Object Identifier
 * {iso(1) member-body(2) United States(840) mit(113554) infosys(1)
 * gssapi(2) generic(1) user_name(1)}.  The recommended symbolic name
 * for this type is "GSS_KRB5_NT_USER_NAME".
 */
extern gss_OID GSS_KRB5_NT_USER_NAME;
/*
 * This name form shall be represented by the Object Identifier
 * {iso(1) member-body(2) United States(840) mit(113554) infosys(1)
 * gssapi(2) generic(1) service_name(4)}.  The previously recommended
 * symbolic name for this type is
 * "GSS_KRB5_NT_HOSTBASED_SERVICE_NAME".  The currently preferred
 * symbolic name for this type is "GSS_C_NT_HOSTBASED_SERVICE".
 */
extern gss_OID GSS_KRB5_NT_HOSTBASED_SERVICE_NAME;
/*
 * This name form shall be represented by the Object Identifier
 * {iso(1) member-body(2) United States(840) mit(113554) infosys(1)
 * gssapi(2) krb5(2) krb5_name(1)}.  The recommended symbolic name for
 * this type is "GSS_KRB5_NT_PRINCIPAL_NAME".
 */
extern gss_OID GSS_KRB5_NT_PRINCIPAL_NAME;
/*
 * This name form shall be represented by the Object Identifier
 * {iso(1) member-body(2) United States(840) mit(113554) infosys(1)
 * gssapi(2) generic(1) machine_uid_name(2)}.  The recommended
 * symbolic name for this type is "GSS_KRB5_NT_MACHINE_UID_NAME".
 */
extern gss_OID GSS_KRB5_NT_MACHINE_UID_NAME;
/*
 * This name form shall be represented by the Object Identifier
 * {iso(1) member-body(2) United States(840) mit(113554) infosys(1)
 * gssapi(2) generic(1) string_uid_name(3)}.  The recommended symbolic
 * name for this type is "GSS_KRB5_NT_STRING_UID_NAME".
 */
extern gss_OID GSS_KRB5_NT_STRING_UID_NAME;
#endif /* GSS_KRB5_H */
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