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Current Path: /usr/src/crypto/heimdal/lib/krb5

usr / src / crypto / heimdal / lib / krb5 /

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📄 Makefile.am(7.68 KB)
📄 Makefile.in(224.98 KB)
📄 acache.c(26.87 KB)
📄 acl.c(7.58 KB)
📄 add_et_list.c(2.2 KB)
📄 addr_families.c(38.89 KB)
📄 aes-test.c(22.56 KB)
📄 aname_to_localname.c(2.83 KB)
📄 appdefault.c(4.41 KB)
📄 asn1_glue.c(2.37 KB)
📄 auth_context.c(14.97 KB)
📄 build_ap_req.c(2.77 KB)
📄 build_auth.c(5.5 KB)
📄 cache.c(41.88 KB)
📄 ccache_plugin.h(1.67 KB)
📄 changepw.c(20.59 KB)
📄 codec.c(6.1 KB)
📄 config_file.c(31.7 KB)
📄 constants.c(2.51 KB)
📄 context.c(37.71 KB)
📄 convert_creds.c(3.46 KB)
📄 copy_host_realm.c(2.66 KB)
📄 crc.c(2.19 KB)
📄 creds.c(8.75 KB)
📄 crypto-aes.c(4.62 KB)
📄 crypto-algs.c(3.04 KB)
📄 crypto-arcfour.c(8.78 KB)
📄 crypto-des-common.c(4.37 KB)
📄 crypto-des.c(8.8 KB)
📄 crypto-des3.c(5.36 KB)
📄 crypto-evp.c(5.45 KB)
📄 crypto-null.c(2.55 KB)
📄 crypto-pk.c(8.4 KB)
📄 crypto-rand.c(3.43 KB)
📄 crypto-stubs.c(3.1 KB)
📄 crypto.c(66.51 KB)
📄 crypto.h(6.5 KB)
📄 data.c(5.66 KB)
📄 deprecated.c(14.72 KB)
📄 derived-key-test.c(6.48 KB)
📄 digest.c(31.6 KB)
📄 doxygen.c(25.72 KB)
📄 eai_to_heim_errno.c(3.46 KB)
📄 error_string.c(8.93 KB)
📄 expand_hostname.c(5.59 KB)
📄 expand_path.c(12.35 KB)
📄 fcache.c(25.36 KB)
📄 free.c(2.01 KB)
📄 free_host_realm.c(2.1 KB)
📄 generate_seq_number.c(2.03 KB)
📄 generate_subkey.c(2.6 KB)
📄 get_addrs.c(8.2 KB)
📄 get_cred.c(38.45 KB)
📄 get_default_principal.c(4.47 KB)
📄 get_default_realm.c(2.74 KB)
📄 get_for_creds.c(13.48 KB)
📄 get_host_realm.c(7.06 KB)
📄 get_in_tkt.c(14.45 KB)
📄 get_port.c(2.04 KB)
📄 heim_err.et(1.7 KB)
📄 init_creds.c(12.11 KB)
📄 init_creds_pw.c(52.57 KB)
📄 k524_err.et(577 B)
📄 kcm.c(26.55 KB)
📄 kcm.h(2.83 KB)
📄 kerberos.8(4.14 KB)
📄 keyblock.c(5.31 KB)
📄 keytab.c(23.88 KB)
📄 keytab_any.c(6.48 KB)
📄 keytab_file.c(19.7 KB)
📄 keytab_keyfile.c(10.74 KB)
📄 keytab_memory.c(6.29 KB)
📄 krb5-private.h(12.91 KB)
📄 krb5-protos.h(113.43 KB)
📄 krb5-v4compat.h(4.44 KB)
📄 krb5.conf.5(18.31 KB)
📄 krb5.h(29.75 KB)
📄 krb5.moduli(1.11 KB)
📄 krb524_convert_creds_kdc.3(3.12 KB)
📄 krb5_425_conv_principal.3(7.02 KB)
📄 krb5_acl_match_file.3(3.49 KB)
📄 krb5_aname_to_localname.3(2.87 KB)
📄 krb5_appdefault.3(3.08 KB)
📄 krb5_auth_context.3(10.8 KB)
📄 krb5_c_make_checksum.3(6.92 KB)
📄 krb5_ccapi.h(7.52 KB)
📄 krb5_check_transited.3(3.28 KB)
📄 krb5_create_checksum.3(6.02 KB)
📄 krb5_creds.3(3.31 KB)
📄 krb5_digest.3(6.57 KB)
📄 krb5_eai_to_heim_errno.3(2.4 KB)
📄 krb5_encrypt.3(7 KB)
📄 krb5_err.et(12.86 KB)
📄 krb5_find_padata.3(2.53 KB)
📄 krb5_generate_random_block.3(2.1 KB)
📄 krb5_get_all_client_addrs.3(2.83 KB)
📄 krb5_get_credentials.3(5.03 KB)
📄 krb5_get_creds.3(5.28 KB)
📄 krb5_get_forwarded_creds.3(2.74 KB)
📄 krb5_get_in_cred.3(7.46 KB)
📄 krb5_get_init_creds.3(11.03 KB)
📄 krb5_get_krbhst.3(3.26 KB)
📄 krb5_getportbyname.3(2.32 KB)
📄 krb5_init_context.3(7.88 KB)
📄 krb5_is_thread_safe.3(2.24 KB)
📄 krb5_krbhst_init.3(5.67 KB)
📄 krb5_locl.h(8.47 KB)
📄 krb5_mk_req.3(5.18 KB)
📄 krb5_mk_safe.3(2.78 KB)
📄 krb5_openlog.3(7.96 KB)
📄 krb5_parse_name.3(2.57 KB)
📄 krb5_principal.3(11.85 KB)
📄 krb5_rcache.3(4.21 KB)
📄 krb5_rd_error.3(3.33 KB)
📄 krb5_rd_safe.3(2.77 KB)
📄 krb5_set_default_realm.3(4.29 KB)
📄 krb5_set_password.3(4.11 KB)
📄 krb5_string_to_key.3(4.39 KB)
📄 krb5_timeofday.3(3.33 KB)
📄 krb5_verify_init_creds.3(3.51 KB)
📄 krb5_verify_user.3(6.71 KB)
📄 krb_err.et(2.55 KB)
📄 krbhst-test.c(3.02 KB)
📄 krbhst.c(26.94 KB)
📄 kuserok.c(8.14 KB)
📄 locate_plugin.h(2.36 KB)
📄 log.c(11.94 KB)
📄 mcache.c(11.54 KB)
📄 misc.c(3.9 KB)
📄 mit_glue.c(11.14 KB)
📄 mk_error.c(3.23 KB)
📄 mk_priv.c(4.54 KB)
📄 mk_rep.c(3.99 KB)
📄 mk_req.c(3.58 KB)
📄 mk_req_ext.c(4.78 KB)
📄 mk_safe.c(4.36 KB)
📄 n-fold-test.c(4.14 KB)
📄 n-fold.c(3.8 KB)
📄 net_read.c(1.86 KB)
📄 net_write.c(3.05 KB)
📄 pac.c(28.37 KB)
📄 padata.c(2.35 KB)
📄 parse-name-test.c(5.81 KB)
📄 pcache.c(2.33 KB)
📄 pkinit.c(63.8 KB)
📄 plugin.c(13.71 KB)
📄 principal.c(28.4 KB)
📄 prog_setup.c(2.34 KB)
📄 prompter_posix.c(2.45 KB)
📄 rd_cred.c(9.44 KB)
📄 rd_error.c(3.83 KB)
📄 rd_priv.c(5.38 KB)
📄 rd_rep.c(3.72 KB)
📄 rd_req.c(25.6 KB)
📄 rd_safe.c(6.34 KB)
📄 read_message.c(3.22 KB)
📄 recvauth.c(6.16 KB)
📄 replay.c(8.24 KB)
📄 salt-aes.c(3.34 KB)
📄 salt-arcfour.c(3.24 KB)
📄 salt-des.c(6.68 KB)
📄 salt-des3.c(4.36 KB)
📄 salt.c(9 KB)
📄 scache.c(32.86 KB)
📄 send_to_kdc.c(16.06 KB)
📄 send_to_kdc_plugin.h(2.22 KB)
📄 sendauth.c(6.12 KB)
📄 set_default_realm.c(3.01 KB)
📄 sock_principal.c(2.52 KB)
📄 store-int.c(2.14 KB)
📄 store-int.h(2.07 KB)
📄 store-test.c(3.63 KB)
📄 store.c(35.77 KB)
📄 store_emem.c(5.06 KB)
📄 store_fd.c(3.4 KB)
📄 store_mem.c(5.42 KB)
📄 string-to-key-test.c(5.75 KB)
📄 test_acl.c(4.56 KB)
📄 test_addr.c(7.27 KB)
📄 test_alname.c(4.28 KB)
📄 test_cc.c(19.39 KB)
📄 test_config.c(7.92 KB)
📄 test_crypto.c(5.68 KB)
📄 test_crypto_wrapping.c(4.48 KB)
📄 test_forward.c(3.64 KB)
📄 test_get_addrs.c(3.21 KB)
📄 test_hostname.c(3.82 KB)
📄 test_keytab.c(7.42 KB)
📄 test_kuserok.c(2.9 KB)
📄 test_mem.c(2.21 KB)
📄 test_pac.c(15.1 KB)
📄 test_pkinit_dh2key.c(6.9 KB)
📄 test_plugin.c(3.4 KB)
📄 test_prf.c(3.21 KB)
📄 test_princ.c(10.44 KB)
📄 test_renew.c(3.22 KB)
📄 test_store.c(7.96 KB)
📄 test_time.c(2.57 KB)
📄 ticket.c(21.91 KB)
📄 time.c(3.84 KB)
📄 transited.c(11.11 KB)
📄 verify_init.c(6.47 KB)
📄 verify_krb5_conf.8(3.41 KB)
📄 verify_krb5_conf.c(20.63 KB)
📄 verify_user.c(7 KB)
📄 version-script.map(18.82 KB)
📄 version.c(1.71 KB)
📄 warn.c(8.98 KB)
📄 write_message.c(2.87 KB)

Editing: kuserok.c

/*
 * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "krb5_locl.h"
#include <dirent.h>

#ifndef _WIN32

/* see if principal is mentioned in the filename access file, return
   TRUE (in result) if so, FALSE otherwise */

static krb5_error_code
check_one_file(krb5_context context,
	       const char *filename,
	       struct passwd *pwd,
	       krb5_principal principal,
	       krb5_boolean *result)
{
    FILE *f;
    char buf[BUFSIZ];
    krb5_error_code ret;
    struct stat st;

*result = FALSE;

f = fopen (filename, "r");
    if (f == NULL)
	return errno;
    rk_cloexec_file(f);

/* check type and mode of file */
    if (fstat(fileno(f), &st) != 0) {
	fclose (f);
	return errno;
    }
    if (S_ISDIR(st.st_mode)) {
	fclose (f);
	return EISDIR;
    }
    if (st.st_uid != pwd->pw_uid && st.st_uid != 0) {
	fclose (f);
	return EACCES;
    }
    if ((st.st_mode & (S_IWGRP | S_IWOTH)) != 0) {
	fclose (f);
	return EACCES;
    }

while (fgets (buf, sizeof(buf), f) != NULL) {
	krb5_principal tmp;
	char *newline = buf + strcspn(buf, "\n");

if(*newline != '\n') {
	    int c;
	    c = fgetc(f);
	    if(c != EOF) {
		while(c != EOF && c != '\n')
		    c = fgetc(f);
		/* line was too long, so ignore it */
		continue;
	    }
	}
	*newline = '\0';
	ret = krb5_parse_name (context, buf, &tmp);
	if (ret)
	    continue;
	*result = krb5_principal_compare (context, principal, tmp);
	krb5_free_principal (context, tmp);
	if (*result) {
	    fclose (f);
	    return 0;
	}
    }
    fclose (f);
    return 0;
}

static krb5_error_code
check_directory(krb5_context context,
		const char *dirname,
		struct passwd *pwd,
		krb5_principal principal,
		krb5_boolean *result)
{
    DIR *d;
    struct dirent *dent;
    char filename[MAXPATHLEN];
    krb5_error_code ret = 0;
    struct stat st;

*result = FALSE;

if(lstat(dirname, &st) < 0)
	return errno;

if (!S_ISDIR(st.st_mode))
	return ENOTDIR;

if (st.st_uid != pwd->pw_uid && st.st_uid != 0)
	return EACCES;
    if ((st.st_mode & (S_IWGRP | S_IWOTH)) != 0)
	return EACCES;

if((d = opendir(dirname)) == NULL)
	return errno;

{
	int fd;
	struct stat st2;

fd = dirfd(d);
	if(fstat(fd, &st2) < 0) {
	    closedir(d);
	    return errno;
	}
	if(st.st_dev != st2.st_dev || st.st_ino != st2.st_ino) {
	    closedir(d);
	    return EACCES;
	}
    }

while((dent = readdir(d)) != NULL) {
	if(strcmp(dent->d_name, ".") == 0 ||
	   strcmp(dent->d_name, "..") == 0 ||
	   dent->d_name[0] == '#' ||			  /* emacs autosave */
	   dent->d_name[strlen(dent->d_name) - 1] == '~') /* emacs backup */
	    continue;
	snprintf(filename, sizeof(filename), "%s/%s", dirname, dent->d_name);
	ret = check_one_file(context, filename, pwd, principal, result);
	if(ret == 0 && *result == TRUE)
	    break;
	ret = 0; /* don't propagate errors upstream */
    }
    closedir(d);
    return ret;
}

#endif  /* !_WIN32 */

static krb5_boolean
match_local_principals(krb5_context context,
		       krb5_principal principal,
		       const char *luser)
{
    krb5_error_code ret;
    krb5_realm *realms, *r;
    krb5_boolean result = FALSE;

/* multi-component principals can never match */
    if(krb5_principal_get_comp_string(context, principal, 1) != NULL)
	return FALSE;

ret = krb5_get_default_realms (context, &realms);
    if (ret)
	return FALSE;

for (r = realms; *r != NULL; ++r) {
	if(strcmp(krb5_principal_get_realm(context, principal),
		  *r) != 0)
	    continue;
	if(strcmp(krb5_principal_get_comp_string(context, principal, 0),
		  luser) == 0) {
	    result = TRUE;
	    break;
	}
    }
    krb5_free_host_realm (context, realms);
    return result;
}

/**
 * This function takes the name of a local user and checks if
 * principal is allowed to log in as that user.
 *
 * The user may have a ~/.k5login file listing principals that are
 * allowed to login as that user. If that file does not exist, all
 * principals with a first component identical to the username, and a
 * realm considered local, are allowed access.
 *
 * The .k5login file must contain one principal per line, be owned by
 * user and not be writable by group or other (but must be readable by
 * anyone).
 *
 * Note that if the file exists, no implicit access rights are given
 * to user@@LOCALREALM.
 *
 * Optionally, a set of files may be put in ~/.k5login.d (a
 * directory), in which case they will all be checked in the same
 * manner as .k5login.  The files may be called anything, but files
 * starting with a hash (#) , or ending with a tilde (~) are
 * ignored. Subdirectories are not traversed. Note that this directory
 * may not be checked by other Kerberos implementations.
 *
 * If no configuration file exists, match user against local domains,
 * ie luser@@LOCAL-REALMS-IN-CONFIGURATION-FILES.
 *
 * @param context Kerberos 5 context.
 * @param principal principal to check if allowed to login
 * @param luser local user id
 *
 * @return returns TRUE if access should be granted, FALSE otherwise.
 *
 * @ingroup krb5_support
 */

KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
krb5_kuserok (krb5_context context,
	      krb5_principal principal,
	      const char *luser)
{
#ifndef _WIN32
    char *buf;
    size_t buflen;
    struct passwd *pwd = NULL;
    char *profile_dir = NULL;
    krb5_error_code ret;
    krb5_boolean result = FALSE;

krb5_boolean found_file = FALSE;

#ifdef POSIX_GETPWNAM_R
    char pwbuf[2048];
    struct passwd pw;

if(getpwnam_r(luser, &pw, pwbuf, sizeof(pwbuf), &pwd) != 0)
	return FALSE;
#else
    pwd = getpwnam (luser);
#endif
    if (pwd == NULL)
	return FALSE;
    profile_dir = pwd->pw_dir;

#define KLOGIN "/.k5login"
    buflen = strlen(profile_dir) + sizeof(KLOGIN) + 2; /* 2 for .d */
    buf = malloc(buflen);
    if(buf == NULL)
	return FALSE;
    /* check user's ~/.k5login */
    strlcpy(buf, profile_dir, buflen);
    strlcat(buf, KLOGIN, buflen);
    ret = check_one_file(context, buf, pwd, principal, &result);

if(ret == 0 && result == TRUE) {
	free(buf);
	return TRUE;
    }

if(ret != ENOENT)
	found_file = TRUE;

strlcat(buf, ".d", buflen);
    ret = check_directory(context, buf, pwd, principal, &result);
    free(buf);
    if(ret == 0 && result == TRUE)
	return TRUE;

if(ret != ENOENT && ret != ENOTDIR)
	found_file = TRUE;

/* finally if no files exist, allow all principals matching
       <localuser>@<LOCALREALM> */
    if(found_file == FALSE)
	return match_local_principals(context, principal, luser);

return FALSE;
#else
    /* The .k5login file may be on a remote profile and we don't have
       access to the profile until we have a token handle for the
       user's credentials. */
    return match_local_principals(context, principal, luser);
#endif
}

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Editing: kuserok.c

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