r8302: import mini HEIMDAL into the tree

(This used to be commit 118be28a7aef233799956615a99d1a2a74dac175)

1 files changed, 663 insertions, 0 deletions

diff --git a/source4/heimdal/lib/krb5/context.c b/source4/heimdal/lib/krb5/context.c
new file mode 100644
index 0000000000..62fb92d666
--- /dev/null
+++ b/source4/heimdal/lib/krb5/context.c
@@ -0,0 +1,663 @@
+/*
+ * 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 <com_err.h>
+
+RCSID("$Id: context.c,v 1.102 2005/05/18 04:20:50 lha Exp $");
+
+#define INIT_FIELD(C, T, E, D, F)					\
+    (C)->E = krb5_config_get_ ## T ## _default ((C), NULL, (D), 	\
+						"libdefaults", F, NULL)
+
+/*
+ * Set the list of etypes `ret_etypes' from the configuration variable
+ * `name'
+ */
+
+static krb5_error_code
+set_etypes (krb5_context context,
+	    const char *name,
+	    krb5_enctype **ret_enctypes)
+{
+    char **etypes_str;
+    krb5_enctype *etypes = NULL;
+
+    etypes_str = krb5_config_get_strings(context, NULL, "libdefaults", 
+					 name, NULL);
+    if(etypes_str){
+	int i, j, k;
+	for(i = 0; etypes_str[i]; i++);
+	etypes = malloc((i+1) * sizeof(*etypes));
+	if (etypes == NULL) {
+	    krb5_config_free_strings (etypes_str);
+	    krb5_set_error_string (context, "malloc: out of memory");
+	    return ENOMEM;
+	}
+	for(j = 0, k = 0; j < i; j++) {
+	    krb5_enctype e;
+	    if(krb5_string_to_enctype(context, etypes_str[j], &e) != 0)
+		continue;
+	    if (krb5_enctype_valid(context, e) != 0)
+		continue;
+	    etypes[k++] = e;
+	}
+	etypes[k] = ETYPE_NULL;
+	krb5_config_free_strings(etypes_str);
+    } 
+    *ret_enctypes = etypes;
+    return 0;
+}
+
+/*
+ * read variables from the configuration file and set in `context'
+ */
+
+static krb5_error_code
+init_context_from_config_file(krb5_context context)
+{
+    krb5_error_code ret;
+    const char * tmp;
+    krb5_enctype *tmptypes;
+
+    INIT_FIELD(context, time, max_skew, 5 * 60, "clockskew");
+    INIT_FIELD(context, time, kdc_timeout, 3, "kdc_timeout");
+    INIT_FIELD(context, int, max_retries, 3, "max_retries");
+
+    INIT_FIELD(context, string, http_proxy, NULL, "http_proxy");
+    
+    ret = set_etypes (context, "default_etypes", &tmptypes);
+    if(ret)
+	return ret;
+    free(context->etypes);
+    context->etypes = tmptypes;
+    
+    ret = set_etypes (context, "default_etypes_des", &tmptypes);
+    if(ret)
+	return ret;
+    free(context->etypes_des);
+    context->etypes_des = tmptypes;
+
+    /* default keytab name */
+    tmp = NULL;
+    if(!issuid())
+	tmp = getenv("KRB5_KTNAME");
+    if(tmp != NULL)
+	context->default_keytab = tmp;
+    else
+	INIT_FIELD(context, string, default_keytab, 
+		   KEYTAB_DEFAULT, "default_keytab_name");
+
+    INIT_FIELD(context, string, default_keytab_modify, 
+	       NULL, "default_keytab_modify_name");
+
+    INIT_FIELD(context, string, time_fmt, 
+	       "%Y-%m-%dT%H:%M:%S", "time_format");
+
+    INIT_FIELD(context, string, date_fmt, 
+	       "%Y-%m-%d", "date_format");
+
+    INIT_FIELD(context, bool, log_utc, 
+	       FALSE, "log_utc");
+
+
+    
+    /* init dns-proxy slime */
+    tmp = krb5_config_get_string(context, NULL, "libdefaults", 
+				 "dns_proxy", NULL);
+    if(tmp) 
+	roken_gethostby_setup(context->http_proxy, tmp);
+    krb5_free_host_realm (context, context->default_realms);
+    context->default_realms = NULL;
+
+    {
+	krb5_addresses addresses;
+	char **adr, **a;
+
+	krb5_set_extra_addresses(context, NULL);
+	adr = krb5_config_get_strings(context, NULL, 
+				      "libdefaults", 
+				      "extra_addresses", 
+				      NULL);
+	memset(&addresses, 0, sizeof(addresses));
+	for(a = adr; a && *a; a++) {
+	    ret = krb5_parse_address(context, *a, &addresses);
+	    if (ret == 0) {
+		krb5_add_extra_addresses(context, &addresses);
+		krb5_free_addresses(context, &addresses);
+	    }
+	}
+	krb5_config_free_strings(adr);
+
+	krb5_set_ignore_addresses(context, NULL);
+	adr = krb5_config_get_strings(context, NULL, 
+				      "libdefaults", 
+				      "ignore_addresses", 
+				      NULL);
+	memset(&addresses, 0, sizeof(addresses));
+	for(a = adr; a && *a; a++) {
+	    ret = krb5_parse_address(context, *a, &addresses);
+	    if (ret == 0) {
+		krb5_add_ignore_addresses(context, &addresses);
+		krb5_free_addresses(context, &addresses);
+	    }
+	}
+	krb5_config_free_strings(adr);
+    }
+    
+    INIT_FIELD(context, bool, scan_interfaces, TRUE, "scan_interfaces");
+    INIT_FIELD(context, int, fcache_vno, 0, "fcache_version");
+    /* prefer dns_lookup_kdc over srv_lookup. */
+    INIT_FIELD(context, bool, srv_lookup, TRUE, "srv_lookup");
+    INIT_FIELD(context, bool, srv_lookup, context->srv_lookup, "dns_lookup_kdc");
+    INIT_FIELD(context, int, large_msg_size, 6000, "large_message_size");
+    context->default_cc_name = NULL;
+    return 0;
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_init_context(krb5_context *context)
+{
+    krb5_context p;
+    krb5_error_code ret;
+    char **files;
+
+    *context = NULL;
+
+    p = calloc(1, sizeof(*p));
+    if(!p)
+	return ENOMEM;
+
+    p->mutex = malloc(sizeof(HEIMDAL_MUTEX));
+    if (p->mutex == NULL) {
+	free(p);
+	return ENOMEM;
+    }
+    HEIMDAL_MUTEX_init(p->mutex);
+
+    ret = krb5_get_default_config_files(&files);
+    if(ret) 
+	goto out;
+    ret = krb5_set_config_files(p, files);
+    krb5_free_config_files(files);
+    if(ret) 
+	goto out;
+
+    /* init error tables */
+    krb5_init_ets(p);
+
+    p->cc_ops = NULL;
+    p->num_cc_ops = 0;
+    krb5_cc_register(p, &krb5_acc_ops, TRUE);
+    krb5_cc_register(p, &krb5_fcc_ops, TRUE);
+    krb5_cc_register(p, &krb5_mcc_ops, TRUE);
+#ifdef HAVE_KCM
+    krb5_cc_register(p, &krb5_kcm_ops, TRUE);
+#endif
+
+    p->num_kt_types = 0;
+    p->kt_types     = NULL;
+    krb5_kt_register (p, &krb5_fkt_ops);
+    krb5_kt_register (p, &krb5_wrfkt_ops);
+    krb5_kt_register (p, &krb5_javakt_ops);
+    krb5_kt_register (p, &krb5_mkt_ops);
+    krb5_kt_register (p, &krb5_mktw_ops);
+    krb5_kt_register (p, &krb5_akf_ops);
+    krb5_kt_register (p, &krb4_fkt_ops);
+    krb5_kt_register (p, &krb5_srvtab_fkt_ops);
+    krb5_kt_register (p, &krb5_any_ops);
+
+out:
+    if(ret) {
+	krb5_free_context(p);
+	p = NULL;
+    }
+    *context = p;
+    return ret;
+}
+
+void KRB5_LIB_FUNCTION
+krb5_free_context(krb5_context context)
+{
+    if (context->default_cc_name)
+	free(context->default_cc_name);
+    free(context->etypes);
+    free(context->etypes_des);
+    krb5_free_host_realm (context, context->default_realms);
+    krb5_config_file_free (context, context->cf);
+    free_error_table (context->et_list);
+    free(context->cc_ops);
+    free(context->kt_types);
+    krb5_clear_error_string(context);
+    if(context->warn_dest != NULL)
+	krb5_closelog(context, context->warn_dest);
+    krb5_set_extra_addresses(context, NULL);
+    krb5_set_ignore_addresses(context, NULL);
+    if (context->mutex != NULL) {
+	HEIMDAL_MUTEX_destroy(context->mutex);
+	free(context->mutex);
+    }
+    memset(context, 0, sizeof(*context));
+    free(context);
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_set_config_files(krb5_context context, char **filenames)
+{
+    krb5_error_code ret;
+    krb5_config_binding *tmp = NULL;
+    while(filenames != NULL && *filenames != NULL && **filenames != '\0') {
+	ret = krb5_config_parse_file_multi(context, *filenames, &tmp);
+	if(ret != 0 && ret != ENOENT && ret != EACCES) {
+	    krb5_config_file_free(context, tmp);
+	    return ret;
+	}
+	filenames++;
+    }
+#if 0
+    /* with this enabled and if there are no config files, Kerberos is
+       considererd disabled */
+    if(tmp == NULL)
+	return ENXIO;
+#endif
+    krb5_config_file_free(context, context->cf);
+    context->cf = tmp;
+    ret = init_context_from_config_file(context);
+    return ret;
+}
+
+static krb5_error_code
+add_file(char ***pfilenames, int *len, char *file)
+{
+    char **pp = *pfilenames;
+    int i;
+
+    for(i = 0; i < *len; i++) {
+	if(strcmp(pp[i], file) == 0) {
+	    free(file);
+	    return 0;
+	}
+    }
+
+    pp = realloc(*pfilenames, (*len + 2) * sizeof(*pp));
+    if (pp == NULL) {
+	free(file);
+	return ENOMEM;
+    }
+
+    pp[*len] = file;
+    pp[*len + 1] = NULL;
+    *pfilenames = pp;
+    *len += 1;
+    return 0;
+}
+
+/*
+ *  `pq' isn't free, its up the the caller
+ */
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_prepend_config_files(const char *filelist, char **pq, char ***ret_pp)
+{
+    krb5_error_code ret;
+    const char *p, *q;
+    char **pp;
+    int len;
+    char *fn;
+
+    pp = NULL;
+
+    len = 0;
+    p = filelist;
+    while(1) {
+	ssize_t l;
+	q = p;
+	l = strsep_copy(&q, ":", NULL, 0);
+	if(l == -1)
+	    break;
+	fn = malloc(l + 1);
+	if(fn == NULL) {
+	    krb5_free_config_files(pp);
+	    return ENOMEM;
+	}
+	l = strsep_copy(&p, ":", fn, l + 1);
+	ret = add_file(&pp, &len, fn);
+	if (ret) {
+	    krb5_free_config_files(pp);
+	    return ret;
+	}
+    }
+
+    if (pq != NULL) {
+	int i;
+
+	for (i = 0; pq[i] != NULL; i++) {
+	    fn = strdup(pq[i]);
+	    if (fn == NULL) {
+		krb5_free_config_files(pp);
+		return ENOMEM;
+	    }
+	    ret = add_file(&pp, &len, fn);
+	    if (ret) {
+		krb5_free_config_files(pp);
+		return ret;
+	    }
+	}
+    }
+
+    *ret_pp = pp;
+    return 0;
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_prepend_config_files_default(const char *filelist, char ***pfilenames)
+{
+    krb5_error_code ret;
+    char **defpp, **pp = NULL;
+    
+    ret = krb5_get_default_config_files(&defpp);
+    if (ret)
+	return ret;
+
+    ret = krb5_prepend_config_files(filelist, defpp, &pp);
+    krb5_free_config_files(defpp);
+    if (ret) {
+	return ret;
+    }	
+    *pfilenames = pp;
+    return 0;
+}
+
+krb5_error_code KRB5_LIB_FUNCTION 
+krb5_get_default_config_files(char ***pfilenames)
+{
+    const char *files = NULL;
+
+    if (pfilenames == NULL)
+        return EINVAL;
+    if(!issuid())
+	files = getenv("KRB5_CONFIG");
+    if (files == NULL)
+	files = krb5_config_file;
+
+    return krb5_prepend_config_files(files, NULL, pfilenames);
+}
+
+void KRB5_LIB_FUNCTION
+krb5_free_config_files(char **filenames)
+{
+    char **p;
+    for(p = filenames; *p != NULL; p++)
+	free(*p);
+    free(filenames);
+}
+
+/*
+ * set `etype' to a malloced list of the default enctypes
+ */
+
+static krb5_error_code
+default_etypes(krb5_context context, krb5_enctype **etype)
+{
+    krb5_enctype p[] = {
+	ETYPE_AES256_CTS_HMAC_SHA1_96,
+	ETYPE_AES128_CTS_HMAC_SHA1_96,
+	ETYPE_DES3_CBC_SHA1,
+	ETYPE_DES3_CBC_MD5,
+	ETYPE_ARCFOUR_HMAC_MD5,
+	ETYPE_DES_CBC_MD5,
+	ETYPE_DES_CBC_MD4,
+	ETYPE_DES_CBC_CRC
+    };
+    krb5_enctype *e = NULL, *ep;
+    int i, n = 0;
+
+    for (i = 0; i < sizeof(p)/sizeof(p[0]); i++) {
+	if (krb5_enctype_valid(context, p[i]) != 0)
+	    continue;
+	ep = realloc(e, (n + 2) * sizeof(*e));
+	if (ep == NULL) {
+	    free(e);
+	    krb5_set_error_string (context, "malloc: out of memory");
+	    return ENOMEM;
+	}
+	e = ep;
+	e[n] = p[i];
+	e[n + 1] = ETYPE_NULL;
+	n++;
+    }
+    *etype = e;
+    return 0;
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_set_default_in_tkt_etypes(krb5_context context, 
+			       const krb5_enctype *etypes)
+{
+    krb5_enctype *p = NULL;
+    int i;
+
+    if(etypes) {
+	for (i = 0; etypes[i]; ++i) {
+	    krb5_error_code ret;
+	    ret = krb5_enctype_valid(context, etypes[i]);
+	    if (ret)
+		return ret;
+	}
+	++i;
+	ALLOC(p, i);
+	if(!p) {
+	    krb5_set_error_string (context, "malloc: out of memory");
+	    return ENOMEM;
+	}
+	memmove(p, etypes, i * sizeof(krb5_enctype));
+    }
+    if(context->etypes)
+	free(context->etypes);
+    context->etypes = p;
+    return 0;
+}
+
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_get_default_in_tkt_etypes(krb5_context context,
+			       krb5_enctype **etypes)
+{
+  krb5_enctype *p;
+  int i;
+  krb5_error_code ret;
+
+  if(context->etypes) {
+    for(i = 0; context->etypes[i]; i++);
+    ++i;
+    ALLOC(p, i);
+    if(!p) {
+      krb5_set_error_string (context, "malloc: out of memory");
+      return ENOMEM;
+    }
+    memmove(p, context->etypes, i * sizeof(krb5_enctype));
+  } else {
+    ret = default_etypes(context, &p);
+    if (ret)
+      return ret;
+  }
+  *etypes = p;
+  return 0;
+}
+
+const char* KRB5_LIB_FUNCTION
+krb5_get_err_text(krb5_context context, krb5_error_code code)
+{
+    const char *p = NULL;
+    if(context != NULL)
+	p = com_right(context->et_list, code);
+    if(p == NULL)
+	p = strerror(code);
+    if (p == NULL)
+	p = "Unknown error";
+    return p;
+}
+
+void KRB5_LIB_FUNCTION
+krb5_init_ets(krb5_context context)
+{
+    if(context->et_list == NULL){
+	krb5_add_et_list(context, initialize_krb5_error_table_r);
+	krb5_add_et_list(context, initialize_asn1_error_table_r);
+	krb5_add_et_list(context, initialize_heim_error_table_r);
+	krb5_add_et_list(context, initialize_k524_error_table_r);
+    }
+}
+
+void KRB5_LIB_FUNCTION
+krb5_set_use_admin_kdc (krb5_context context, krb5_boolean flag)
+{
+    context->use_admin_kdc = flag;
+}
+
+krb5_boolean KRB5_LIB_FUNCTION
+krb5_get_use_admin_kdc (krb5_context context)
+{
+    return context->use_admin_kdc;
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_add_extra_addresses(krb5_context context, krb5_addresses *addresses)
+{
+
+    if(context->extra_addresses)
+	return krb5_append_addresses(context, 
+				     context->extra_addresses, addresses);
+    else
+	return krb5_set_extra_addresses(context, addresses);
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_set_extra_addresses(krb5_context context, const krb5_addresses *addresses)
+{
+    if(context->extra_addresses)
+	krb5_free_addresses(context, context->extra_addresses);
+
+    if(addresses == NULL) {
+	if(context->extra_addresses != NULL) {
+	    free(context->extra_addresses);
+	    context->extra_addresses = NULL;
+	}
+	return 0;
+    }
+    if(context->extra_addresses == NULL) {
+	context->extra_addresses = malloc(sizeof(*context->extra_addresses));
+	if(context->extra_addresses == NULL) {
+	    krb5_set_error_string (context, "malloc: out of memory");
+	    return ENOMEM;
+	}
+    }
+    return krb5_copy_addresses(context, addresses, context->extra_addresses);
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_get_extra_addresses(krb5_context context, krb5_addresses *addresses)
+{
+    if(context->extra_addresses == NULL) {
+	memset(addresses, 0, sizeof(*addresses));
+	return 0;
+    }
+    return krb5_copy_addresses(context,context->extra_addresses, addresses);
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_add_ignore_addresses(krb5_context context, krb5_addresses *addresses)
+{
+
+    if(context->ignore_addresses)
+	return krb5_append_addresses(context, 
+				     context->ignore_addresses, addresses);
+    else
+	return krb5_set_ignore_addresses(context, addresses);
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_set_ignore_addresses(krb5_context context, const krb5_addresses *addresses)
+{
+    if(context->ignore_addresses)
+	krb5_free_addresses(context, context->ignore_addresses);
+    if(addresses == NULL) {
+	if(context->ignore_addresses != NULL) {
+	    free(context->ignore_addresses);
+	    context->ignore_addresses = NULL;
+	}
+	return 0;
+    }
+    if(context->ignore_addresses == NULL) {
+	context->ignore_addresses = malloc(sizeof(*context->ignore_addresses));
+	if(context->ignore_addresses == NULL) {
+	    krb5_set_error_string (context, "malloc: out of memory");
+	    return ENOMEM;
+	}
+    }
+    return krb5_copy_addresses(context, addresses, context->ignore_addresses);
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_get_ignore_addresses(krb5_context context, krb5_addresses *addresses)
+{
+    if(context->ignore_addresses == NULL) {
+	memset(addresses, 0, sizeof(*addresses));
+	return 0;
+    }
+    return krb5_copy_addresses(context, context->ignore_addresses, addresses);
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_set_fcache_version(krb5_context context, int version)
+{
+    context->fcache_vno = version;
+    return 0;
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_get_fcache_version(krb5_context context, int *version)
+{
+    *version = context->fcache_vno;
+    return 0;
+}
+
+krb5_boolean KRB5_LIB_FUNCTION
+krb5_is_thread_safe(void)
+{
+#ifdef ENABLE_PTHREAD_SUPPORT
+    return TRUE;
+#else
+    return FALSE;
+#endif
+}