vendor/heimdal/1.5

1 files changed, 1451 insertions, 0 deletions

diff --git a/lib/krb5/scache.c b/lib/krb5/scache.c
new file mode 100644
index 000000000000..5c422c6a4491
--- /dev/null
+++ b/lib/krb5/scache.c
@@ -0,0 +1,1451 @@
+/*
+ * Copyright (c) 2008 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"
+
+#ifdef HAVE_SCC
+
+#include <sqlite3.h>
+
+typedef struct krb5_scache {
+    char *name;
+    char *file;
+    sqlite3 *db;
+
+    sqlite_uint64 cid;
+
+    sqlite3_stmt *icred;
+    sqlite3_stmt *dcred;
+    sqlite3_stmt *iprincipal;
+
+    sqlite3_stmt *icache;
+    sqlite3_stmt *ucachen;
+    sqlite3_stmt *ucachep;
+    sqlite3_stmt *dcache;
+    sqlite3_stmt *scache;
+    sqlite3_stmt *scache_name;
+    sqlite3_stmt *umaster;
+
+} krb5_scache;
+
+#define	SCACHE(X)	((krb5_scache *)(X)->data.data)
+
+#define SCACHE_DEF_NAME		"Default-cache"
+#ifdef KRB5_USE_PATH_TOKENS
+#define KRB5_SCACHE_DB	"%{TEMP}/krb5scc_%{uid}"
+#else
+#define KRB5_SCACHE_DB	"/tmp/krb5scc_%{uid}"
+#endif
+#define KRB5_SCACHE_NAME	"SCC:"  SCACHE_DEF_NAME ":" KRB5_SCACHE_DB
+
+#define SCACHE_INVALID_CID	((sqlite_uint64)-1)
+
+/*
+ *
+ */
+
+#define SQL_CMASTER ""				\
+	"CREATE TABLE master ("			\
+        "oid INTEGER PRIMARY KEY,"		\
+	"version INTEGER NOT NULL,"		\
+	"defaultcache TEXT NOT NULL"		\
+	")"
+
+#define SQL_SETUP_MASTER \
+	"INSERT INTO master (version,defaultcache) VALUES(2, \"" SCACHE_DEF_NAME "\")"
+#define SQL_UMASTER "UPDATE master SET defaultcache=? WHERE version=2"
+
+#define SQL_CCACHE ""				\
+	"CREATE TABLE caches ("			\
+        "oid INTEGER PRIMARY KEY,"		\
+	"principal TEXT,"			\
+	"name TEXT NOT NULL"			\
+	")"
+
+#define SQL_TCACHE ""						\
+	"CREATE TRIGGER CacheDropCreds AFTER DELETE ON caches "	\
+	"FOR EACH ROW BEGIN "					\
+	"DELETE FROM credentials WHERE cid=old.oid;"		\
+	"END"
+
+#define SQL_ICACHE "INSERT INTO caches (name) VALUES(?)"
+#define SQL_UCACHE_NAME "UPDATE caches SET name=? WHERE OID=?"
+#define SQL_UCACHE_PRINCIPAL "UPDATE caches SET principal=? WHERE OID=?"
+#define SQL_DCACHE "DELETE FROM caches WHERE OID=?"
+#define SQL_SCACHE "SELECT principal,name FROM caches WHERE OID=?"
+#define SQL_SCACHE_NAME "SELECT oid FROM caches WHERE NAME=?"
+
+#define SQL_CCREDS ""				\
+	"CREATE TABLE credentials ("		\
+        "oid INTEGER PRIMARY KEY,"		\
+	"cid INTEGER NOT NULL,"			\
+	"kvno INTEGER NOT NULL,"		\
+	"etype INTEGER NOT NULL,"		\
+        "created_at INTEGER NOT NULL,"		\
+	"cred BLOB NOT NULL"			\
+	")"
+
+#define SQL_TCRED ""							\
+	"CREATE TRIGGER credDropPrincipal AFTER DELETE ON credentials "	\
+	"FOR EACH ROW BEGIN "						\
+	"DELETE FROM principals WHERE credential_id=old.oid;"		\
+	"END"
+
+#define SQL_ICRED "INSERT INTO credentials (cid, kvno, etype, cred, created_at) VALUES (?,?,?,?,?)"
+#define SQL_DCRED "DELETE FROM credentials WHERE cid=?"
+
+#define SQL_CPRINCIPALS ""			\
+	"CREATE TABLE principals ("		\
+        "oid INTEGER PRIMARY KEY,"		\
+	"principal TEXT NOT NULL,"		\
+	"type INTEGER NOT NULL,"		\
+	"credential_id INTEGER NOT NULL"	\
+	")"
+
+#define SQL_IPRINCIPAL "INSERT INTO principals (principal, type, credential_id) VALUES (?,?,?)"
+
+/*
+ * sqlite destructors
+ */
+
+static void
+free_data(void *data)
+{
+    free(data);
+}
+
+static void
+free_krb5(void *str)
+{
+    krb5_xfree(str);
+}
+
+static void
+scc_free(krb5_scache *s)
+{
+    if (s->file)
+	free(s->file);
+    if (s->name)
+	free(s->name);
+
+    if (s->icred)
+	sqlite3_finalize(s->icred);
+    if (s->dcred)
+	sqlite3_finalize(s->dcred);
+    if (s->iprincipal)
+	sqlite3_finalize(s->iprincipal);
+    if (s->icache)
+	sqlite3_finalize(s->icache);
+    if (s->ucachen)
+	sqlite3_finalize(s->ucachen);
+    if (s->ucachep)
+	sqlite3_finalize(s->ucachep);
+    if (s->dcache)
+	sqlite3_finalize(s->dcache);
+    if (s->scache)
+	sqlite3_finalize(s->scache);
+    if (s->scache_name)
+	sqlite3_finalize(s->scache_name);
+    if (s->umaster)
+	sqlite3_finalize(s->umaster);
+
+    if (s->db)
+	sqlite3_close(s->db);
+    free(s);
+}
+
+#ifdef TRACEME
+static void
+trace(void* ptr, const char * str)
+{
+    printf("SQL: %s\n", str);
+}
+#endif
+
+static krb5_error_code
+prepare_stmt(krb5_context context, sqlite3 *db,
+	     sqlite3_stmt **stmt, const char *str)
+{
+    int ret;
+
+    ret = sqlite3_prepare_v2(db, str, -1, stmt, NULL);
+    if (ret != SQLITE_OK) {
+	krb5_set_error_message(context, ENOENT,
+			       N_("Failed to prepare stmt %s: %s", ""),
+			       str, sqlite3_errmsg(db));
+	return ENOENT;
+    }
+    return 0;
+}
+
+static krb5_error_code
+exec_stmt(krb5_context context, sqlite3 *db, const char *str,
+	  krb5_error_code code)
+{
+    int ret;
+
+    ret = sqlite3_exec(db, str, NULL, NULL, NULL);
+    if (ret != SQLITE_OK && code) {
+	krb5_set_error_message(context, code,
+			       N_("scache execute %s: %s", ""), str,
+			       sqlite3_errmsg(db));
+	return code;
+    }
+    return 0;
+}
+
+static krb5_error_code
+default_db(krb5_context context, sqlite3 **db)
+{
+    char *name;
+    int ret;
+
+    ret = _krb5_expand_default_cc_name(context, KRB5_SCACHE_DB, &name);
+    if (ret)
+	return ret;
+
+    ret = sqlite3_open_v2(name, db, SQLITE_OPEN_READWRITE, NULL);
+    free(name);
+    if (ret != SQLITE_OK) {
+	krb5_clear_error_message(context);
+	return ENOENT;
+    }
+
+#ifdef TRACEME
+    sqlite3_trace(*db, trace, NULL);
+#endif
+
+    return 0;
+}
+
+static krb5_error_code
+get_def_name(krb5_context context, char **str)
+{
+    krb5_error_code ret;
+    sqlite3_stmt *stmt;
+    const char *name;
+    sqlite3 *db;
+
+    ret = default_db(context, &db);
+    if (ret)
+	return ret;
+
+    ret = prepare_stmt(context, db, &stmt, "SELECT defaultcache FROM master");
+    if (ret) {
+	sqlite3_close(db);
+	return ret;
+    }
+
+    ret = sqlite3_step(stmt);
+    if (ret != SQLITE_ROW)
+	goto out;
+
+    if (sqlite3_column_type(stmt, 0) != SQLITE_TEXT)
+	goto out;
+
+    name = (const char *)sqlite3_column_text(stmt, 0);
+    if (name == NULL)
+	goto out;
+
+    *str = strdup(name);
+    if (*str == NULL)
+	goto out;
+
+    sqlite3_finalize(stmt);
+    sqlite3_close(db);
+    return 0;
+out:
+    sqlite3_finalize(stmt);
+    sqlite3_close(db);
+    krb5_clear_error_message(context);
+    return ENOENT;
+}
+
+
+
+static krb5_scache * KRB5_CALLCONV
+scc_alloc(krb5_context context, const char *name)
+{
+    krb5_error_code ret;
+    krb5_scache *s;
+
+    ALLOC(s, 1);
+    if(s == NULL)
+	return NULL;
+
+    s->cid = SCACHE_INVALID_CID;
+
+    if (name) {
+	char *file;
+
+	if (*name == '\0') {
+	    krb5_error_code ret;
+	    ret = get_def_name(context, &s->name);
+	    if (ret)
+		s->name = strdup(SCACHE_DEF_NAME);
+	} else
+	    s->name = strdup(name);
+
+	file = strrchr(s->name, ':');
+	if (file) {
+	    *file++ = '\0';
+	    s->file = strdup(file);
+	    ret = 0;
+	} else {
+	    ret = _krb5_expand_default_cc_name(context, KRB5_SCACHE_DB, &s->file);
+	}
+    } else {
+	_krb5_expand_default_cc_name(context, KRB5_SCACHE_DB, &s->file);
+	ret = asprintf(&s->name, "unique-%p", s);
+    }
+    if (ret < 0 || s->file == NULL || s->name == NULL) {
+	scc_free(s);
+	return NULL;
+    }
+
+    return s;
+}
+
+static krb5_error_code
+open_database(krb5_context context, krb5_scache *s, int flags)
+{
+    int ret;
+
+    ret = sqlite3_open_v2(s->file, &s->db, SQLITE_OPEN_READWRITE|flags, NULL);
+    if (ret) {
+	if (s->db) {
+	    krb5_set_error_message(context, ENOENT,
+				   N_("Error opening scache file %s: %s", ""),
+				   s->file, sqlite3_errmsg(s->db));
+	    sqlite3_close(s->db);
+	    s->db = NULL;
+	} else
+	    krb5_set_error_message(context, ENOENT,
+				   N_("malloc: out of memory", ""));
+	return ENOENT;
+    }
+    return 0;
+}
+
+static krb5_error_code
+create_cache(krb5_context context, krb5_scache *s)
+{
+    int ret;
+
+    sqlite3_bind_text(s->icache, 1, s->name, -1, NULL);
+    do {
+	ret = sqlite3_step(s->icache);
+    } while (ret == SQLITE_ROW);
+    if (ret != SQLITE_DONE) {
+	krb5_set_error_message(context, KRB5_CC_IO,
+			       N_("Failed to add scache: %d", ""), ret);
+	return KRB5_CC_IO;
+    }
+    sqlite3_reset(s->icache);
+
+    s->cid = sqlite3_last_insert_rowid(s->db);
+
+    return 0;
+}
+
+static krb5_error_code
+make_database(krb5_context context, krb5_scache *s)
+{
+    int created_file = 0;
+    int ret;
+
+    if (s->db)
+	return 0;
+
+    ret = open_database(context, s, 0);
+    if (ret) {
+	mode_t oldumask = umask(077);
+	ret = open_database(context, s, SQLITE_OPEN_CREATE);
+	umask(oldumask);
+	if (ret) goto out;
+
+	created_file = 1;
+
+	ret = exec_stmt(context, s->db, SQL_CMASTER, KRB5_CC_IO);
+	if (ret) goto out;
+	ret = exec_stmt(context, s->db, SQL_CCACHE, KRB5_CC_IO);
+	if (ret) goto out;
+	ret = exec_stmt(context, s->db, SQL_CCREDS, KRB5_CC_IO);
+	if (ret) goto out;
+	ret = exec_stmt(context, s->db, SQL_CPRINCIPALS, KRB5_CC_IO);
+	if (ret) goto out;
+	ret = exec_stmt(context, s->db, SQL_SETUP_MASTER, KRB5_CC_IO);
+	if (ret) goto out;
+
+	ret = exec_stmt(context, s->db, SQL_TCACHE, KRB5_CC_IO);
+	if (ret) goto out;
+	ret = exec_stmt(context, s->db, SQL_TCRED, KRB5_CC_IO);
+	if (ret) goto out;
+    }
+
+#ifdef TRACEME
+    sqlite3_trace(s->db, trace, NULL);
+#endif
+
+    ret = prepare_stmt(context, s->db, &s->icred, SQL_ICRED);
+    if (ret) goto out;
+    ret = prepare_stmt(context, s->db, &s->dcred, SQL_DCRED);
+    if (ret) goto out;
+    ret = prepare_stmt(context, s->db, &s->iprincipal, SQL_IPRINCIPAL);
+    if (ret) goto out;
+    ret = prepare_stmt(context, s->db, &s->icache, SQL_ICACHE);
+    if (ret) goto out;
+    ret = prepare_stmt(context, s->db, &s->ucachen, SQL_UCACHE_NAME);
+    if (ret) goto out;
+    ret = prepare_stmt(context, s->db, &s->ucachep, SQL_UCACHE_PRINCIPAL);
+    if (ret) goto out;
+    ret = prepare_stmt(context, s->db, &s->dcache, SQL_DCACHE);
+    if (ret) goto out;
+    ret = prepare_stmt(context, s->db, &s->scache, SQL_SCACHE);
+    if (ret) goto out;
+    ret = prepare_stmt(context, s->db, &s->scache_name, SQL_SCACHE_NAME);
+    if (ret) goto out;
+    ret = prepare_stmt(context, s->db, &s->umaster, SQL_UMASTER);
+    if (ret) goto out;
+
+    return 0;
+
+out:
+    if (s->db)
+	sqlite3_close(s->db);
+    if (created_file)
+	unlink(s->file);
+
+    return ret;
+}
+
+static krb5_error_code
+bind_principal(krb5_context context,
+	       sqlite3 *db,
+	       sqlite3_stmt *stmt,
+	       int col,
+	       krb5_const_principal principal)
+{
+    krb5_error_code ret;
+    char *str;
+
+    ret = krb5_unparse_name(context, principal, &str);
+    if (ret)
+	return ret;
+
+    ret = sqlite3_bind_text(stmt, col, str, -1, free_krb5);
+    if (ret != SQLITE_OK) {
+	krb5_xfree(str);
+	krb5_set_error_message(context, ENOMEM,
+			       N_("scache bind principal: %s", ""),
+			       sqlite3_errmsg(db));
+	return ENOMEM;
+    }
+    return 0;
+}
+
+/*
+ *
+ */
+
+static const char* KRB5_CALLCONV
+scc_get_name(krb5_context context,
+	     krb5_ccache id)
+{
+    return SCACHE(id)->name;
+}
+
+static krb5_error_code KRB5_CALLCONV
+scc_resolve(krb5_context context, krb5_ccache *id, const char *res)
+{
+    krb5_scache *s;
+    int ret;
+
+    s = scc_alloc(context, res);
+    if (s == NULL) {
+	krb5_set_error_message(context, KRB5_CC_NOMEM,
+			       N_("malloc: out of memory", ""));
+	return KRB5_CC_NOMEM;
+    }
+
+    ret = make_database(context, s);
+    if (ret) {
+	scc_free(s);
+	return ret;
+    }
+
+    ret = sqlite3_bind_text(s->scache_name, 1, s->name, -1, NULL);
+    if (ret != SQLITE_OK) {
+	krb5_set_error_message(context, ENOMEM,
+			       "bind name: %s", sqlite3_errmsg(s->db));
+	scc_free(s);
+	return ENOMEM;
+    }
+
+    if (sqlite3_step(s->scache_name) == SQLITE_ROW) {
+
+	if (sqlite3_column_type(s->scache_name, 0) != SQLITE_INTEGER) {
+	    sqlite3_reset(s->scache_name);
+	    krb5_set_error_message(context, KRB5_CC_END,
+				   N_("Cache name of wrong type "
+				      "for scache %s", ""),
+				   s->name);
+	    scc_free(s);
+	    return KRB5_CC_END;
+	}
+
+	s->cid = sqlite3_column_int(s->scache_name, 0);
+    } else {
+	s->cid = SCACHE_INVALID_CID;
+    }
+    sqlite3_reset(s->scache_name);
+
+    (*id)->data.data = s;
+    (*id)->data.length = sizeof(*s);
+
+    return 0;
+}
+
+static krb5_error_code KRB5_CALLCONV
+scc_gen_new(krb5_context context, krb5_ccache *id)
+{
+    krb5_scache *s;
+
+    s = scc_alloc(context, NULL);
+
+    if (s == NULL) {
+	krb5_set_error_message(context, KRB5_CC_NOMEM,
+			       N_("malloc: out of memory", ""));
+	return KRB5_CC_NOMEM;
+    }
+
+    (*id)->data.data = s;
+    (*id)->data.length = sizeof(*s);
+
+    return 0;
+}
+
+static krb5_error_code KRB5_CALLCONV
+scc_initialize(krb5_context context,
+	       krb5_ccache id,
+	       krb5_principal primary_principal)
+{
+    krb5_scache *s = SCACHE(id);
+    krb5_error_code ret;
+
+    ret = make_database(context, s);
+    if (ret)
+	return ret;
+
+    ret = exec_stmt(context, s->db, "BEGIN IMMEDIATE TRANSACTION", KRB5_CC_IO);
+    if (ret) return ret;
+
+    if (s->cid == SCACHE_INVALID_CID) {
+	ret = create_cache(context, s);
+	if (ret)
+	    goto rollback;
+    } else {
+	sqlite3_bind_int(s->dcred, 1, s->cid);
+	do {
+	    ret = sqlite3_step(s->dcred);
+	} while (ret == SQLITE_ROW);
+	sqlite3_reset(s->dcred);
+	if (ret != SQLITE_DONE) {
+	    ret = KRB5_CC_IO;
+	    krb5_set_error_message(context, ret,
+				   N_("Failed to delete old "
+				      "credentials: %s", ""),
+				   sqlite3_errmsg(s->db));
+	    goto rollback;
+	}
+    }
+
+    ret = bind_principal(context, s->db, s->ucachep, 1, primary_principal);
+    if (ret)
+	goto rollback;
+    sqlite3_bind_int(s->ucachep, 2, s->cid);
+
+    do {
+	ret = sqlite3_step(s->ucachep);
+    } while (ret == SQLITE_ROW);
+    sqlite3_reset(s->ucachep);
+    if (ret != SQLITE_DONE) {
+	ret = KRB5_CC_IO;
+	krb5_set_error_message(context, ret,
+			       N_("Failed to bind principal to cache %s", ""),
+			       sqlite3_errmsg(s->db));
+	goto rollback;
+    }
+
+    ret = exec_stmt(context, s->db, "COMMIT", KRB5_CC_IO);
+    if (ret) return ret;
+
+    return 0;
+
+rollback:
+    exec_stmt(context, s->db, "ROLLBACK", 0);
+
+    return ret;
+
+}
+
+static krb5_error_code KRB5_CALLCONV
+scc_close(krb5_context context,
+	  krb5_ccache id)
+{
+    scc_free(SCACHE(id));
+    return 0;
+}
+
+static krb5_error_code KRB5_CALLCONV
+scc_destroy(krb5_context context,
+	    krb5_ccache id)
+{
+    krb5_scache *s = SCACHE(id);
+    int ret;
+
+    if (s->cid == SCACHE_INVALID_CID)
+	return 0;
+
+    sqlite3_bind_int(s->dcache, 1, s->cid);
+    do {
+	ret = sqlite3_step(s->dcache);
+    } while (ret == SQLITE_ROW);
+    sqlite3_reset(s->dcache);
+    if (ret != SQLITE_DONE) {
+	krb5_set_error_message(context, KRB5_CC_IO,
+			       N_("Failed to destroy cache %s: %s", ""),
+			       s->name, sqlite3_errmsg(s->db));
+	return KRB5_CC_IO;
+    }
+    return 0;
+}
+
+static krb5_error_code
+encode_creds(krb5_context context, krb5_creds *creds, krb5_data *data)
+{
+    krb5_error_code ret;
+    krb5_storage *sp;
+
+    sp = krb5_storage_emem();
+    if (sp == NULL) {
+	krb5_set_error_message(context, ENOMEM,
+			       N_("malloc: out of memory", ""));
+	return ENOMEM;
+    }
+
+    ret = krb5_store_creds(sp, creds);
+    if (ret) {
+	krb5_set_error_message(context, ret,
+			       N_("Failed to store credential in scache", ""));
+	krb5_storage_free(sp);
+	return ret;
+    }
+
+    ret = krb5_storage_to_data(sp, data);
+    krb5_storage_free(sp);
+    if (ret)
+	krb5_set_error_message(context, ret,
+			       N_("Failed to encode credential in scache", ""));
+    return ret;
+}
+
+static krb5_error_code
+decode_creds(krb5_context context, const void *data, size_t length,
+	     krb5_creds *creds)
+{
+    krb5_error_code ret;
+    krb5_storage *sp;
+
+    sp = krb5_storage_from_readonly_mem(data, length);
+    if (sp == NULL) {
+	krb5_set_error_message(context, ENOMEM,
+			       N_("malloc: out of memory", ""));
+	return ENOMEM;
+    }
+
+    ret = krb5_ret_creds(sp, creds);
+    krb5_storage_free(sp);
+    if (ret) {
+	krb5_set_error_message(context, ret,
+			       N_("Failed to read credential in scache", ""));
+	return ret;
+    }
+    return 0;
+}
+
+
+static krb5_error_code KRB5_CALLCONV
+scc_store_cred(krb5_context context,
+	       krb5_ccache id,
+	       krb5_creds *creds)
+{
+    sqlite_uint64 credid;
+    krb5_scache *s = SCACHE(id);
+    krb5_error_code ret;
+    krb5_data data;
+
+    ret = make_database(context, s);
+    if (ret)
+	return ret;
+
+    ret = encode_creds(context, creds, &data);
+    if (ret)
+	return ret;
+
+    sqlite3_bind_int(s->icred, 1, s->cid);
+    {
+	krb5_enctype etype = 0;
+	int kvno = 0;
+	Ticket t;
+	size_t len;
+
+	ret = decode_Ticket(creds->ticket.data,
+			    creds->ticket.length, &t, &len);
+	if (ret == 0) {
+	    if(t.enc_part.kvno)
+		kvno = *t.enc_part.kvno;
+
+	    etype = t.enc_part.etype;
+
+	    free_Ticket(&t);
+	}
+
+	sqlite3_bind_int(s->icred, 2, kvno);
+	sqlite3_bind_int(s->icred, 3, etype);
+
+    }
+
+    sqlite3_bind_blob(s->icred, 4, data.data, data.length, free_data);
+    sqlite3_bind_int(s->icred, 5, time(NULL));
+
+    ret = exec_stmt(context, s->db, "BEGIN IMMEDIATE TRANSACTION", KRB5_CC_IO);
+    if (ret) return ret;
+
+    do {
+	ret = sqlite3_step(s->icred);
+    } while (ret == SQLITE_ROW);
+    sqlite3_reset(s->icred);
+    if (ret != SQLITE_DONE) {
+	ret = KRB5_CC_IO;
+	krb5_set_error_message(context, ret,
+			       N_("Failed to add credential: %s", ""),
+			       sqlite3_errmsg(s->db));
+	goto rollback;
+    }
+
+    credid = sqlite3_last_insert_rowid(s->db);
+
+    {
+	bind_principal(context, s->db, s->iprincipal, 1, creds->server);
+	sqlite3_bind_int(s->iprincipal, 2, 1);
+	sqlite3_bind_int(s->iprincipal, 3, credid);
+
+	do {
+	    ret = sqlite3_step(s->iprincipal);
+	} while (ret == SQLITE_ROW);
+	sqlite3_reset(s->iprincipal);
+	if (ret != SQLITE_DONE) {
+	    ret = KRB5_CC_IO;
+	    krb5_set_error_message(context, ret,
+				   N_("Failed to add principal: %s", ""),
+				   sqlite3_errmsg(s->db));
+	    goto rollback;
+	}
+    }
+
+    {
+	bind_principal(context, s->db, s->iprincipal, 1, creds->client);
+	sqlite3_bind_int(s->iprincipal, 2, 0);
+	sqlite3_bind_int(s->iprincipal, 3, credid);
+
+	do {
+	    ret = sqlite3_step(s->iprincipal);
+	} while (ret == SQLITE_ROW);
+	sqlite3_reset(s->iprincipal);
+	if (ret != SQLITE_DONE) {
+	    ret = KRB5_CC_IO;
+	    krb5_set_error_message(context, ret,
+				   N_("Failed to add principal: %s", ""),
+				   sqlite3_errmsg(s->db));
+	    goto rollback;
+	}
+    }
+
+    ret = exec_stmt(context, s->db, "COMMIT", KRB5_CC_IO);
+    if (ret) return ret;
+
+    return 0;
+
+rollback:
+    exec_stmt(context, s->db, "ROLLBACK", 0);
+
+    return ret;
+}
+
+static krb5_error_code KRB5_CALLCONV
+scc_get_principal(krb5_context context,
+		  krb5_ccache id,
+		  krb5_principal *principal)
+{
+    krb5_scache *s = SCACHE(id);
+    krb5_error_code ret;
+    const char *str;
+
+    *principal = NULL;
+
+    ret = make_database(context, s);
+    if (ret)
+	return ret;
+
+    sqlite3_bind_int(s->scache, 1, s->cid);
+
+    if (sqlite3_step(s->scache) != SQLITE_ROW) {
+	sqlite3_reset(s->scache);
+	krb5_set_error_message(context, KRB5_CC_END,
+			       N_("No principal for cache SCC:%s:%s", ""),
+			       s->name, s->file);
+	return KRB5_CC_END;
+    }
+
+    if (sqlite3_column_type(s->scache, 0) != SQLITE_TEXT) {
+	sqlite3_reset(s->scache);
+	krb5_set_error_message(context, KRB5_CC_END,
+			       N_("Principal data of wrong type "
+				  "for SCC:%s:%s", ""),
+			       s->name, s->file);
+	return KRB5_CC_END;
+    }
+
+    str = (const char *)sqlite3_column_text(s->scache, 0);
+    if (str == NULL) {
+	sqlite3_reset(s->scache);
+	krb5_set_error_message(context, KRB5_CC_END,
+			       N_("Principal not set for SCC:%s:%s", ""),
+			       s->name, s->file);
+	return KRB5_CC_END;
+    }
+
+    ret = krb5_parse_name(context, str, principal);
+
+    sqlite3_reset(s->scache);
+
+    return ret;
+}
+
+struct cred_ctx {
+    char *drop;
+    sqlite3_stmt *stmt;
+    sqlite3_stmt *credstmt;
+};
+
+static krb5_error_code KRB5_CALLCONV
+scc_get_first (krb5_context context,
+	       krb5_ccache id,
+	       krb5_cc_cursor *cursor)
+{
+    krb5_scache *s = SCACHE(id);
+    krb5_error_code ret;
+    struct cred_ctx *ctx;
+    char *str = NULL, *name = NULL;
+
+    *cursor = NULL;
+
+    ctx = calloc(1, sizeof(*ctx));
+    if (ctx == NULL) {
+	krb5_set_error_message(context, ENOMEM,
+			       N_("malloc: out of memory", ""));
+	return ENOMEM;
+    }
+
+    ret = make_database(context, s);
+    if (ret) {
+	free(ctx);
+	return ret;
+    }
+
+    if (s->cid == SCACHE_INVALID_CID) {
+	krb5_set_error_message(context, KRB5_CC_END,
+			       N_("Iterating a invalid scache %s", ""),
+			       s->name);
+	free(ctx);
+	return KRB5_CC_END;
+    }
+
+    ret = asprintf(&name, "credIteration%pPid%d",
+                   ctx, (int)getpid());
+    if (ret < 0 || name == NULL) {
+	krb5_set_error_message(context, ENOMEM,
+			       N_("malloc: out of memory", ""));
+	free(ctx);
+	return ENOMEM;
+    }
+
+    ret = asprintf(&ctx->drop, "DROP TABLE %s", name);
+    if (ret < 0 || ctx->drop == NULL) {
+	krb5_set_error_message(context, ENOMEM,
+			       N_("malloc: out of memory", ""));
+	free(name);
+	free(ctx);
+	return ENOMEM;
+    }
+
+    ret = asprintf(&str, "CREATE TEMPORARY TABLE %s "
+	     "AS SELECT oid,created_at FROM credentials WHERE cid = %lu",
+	     name, (unsigned long)s->cid);
+    if (ret < 0 || str == NULL) {
+	free(ctx->drop);
+	free(name);
+	free(ctx);
+	return ENOMEM;
+    }
+
+    ret = exec_stmt(context, s->db, str, KRB5_CC_IO);
+    free(str);
+    str = NULL;
+    if (ret) {
+	free(ctx->drop);
+	free(name);
+	free(ctx);
+	return ret;
+    }
+
+    ret = asprintf(&str, "SELECT oid FROM %s ORDER BY created_at", name);
+    if (ret < 0 || str == NULL) {
+	exec_stmt(context, s->db, ctx->drop, 0);
+	free(ctx->drop);
+	free(name);
+	free(ctx);
+	return ret;
+    }
+
+    ret = prepare_stmt(context, s->db, &ctx->stmt, str);
+    free(str);
+    str = NULL;
+    free(name);
+    if (ret) {
+	exec_stmt(context, s->db, ctx->drop, 0);
+	free(ctx->drop);
+	free(ctx);
+	return ret;
+    }
+
+    ret = prepare_stmt(context, s->db, &ctx->credstmt,
+		       "SELECT cred FROM credentials WHERE oid = ?");
+    if (ret) {
+	sqlite3_finalize(ctx->stmt);
+	exec_stmt(context, s->db, ctx->drop, 0);
+	free(ctx->drop);
+	free(ctx);
+	return ret;
+    }
+
+    *cursor = ctx;
+
+    return 0;
+}
+
+static krb5_error_code KRB5_CALLCONV
+scc_get_next (krb5_context context,
+	      krb5_ccache id,
+	      krb5_cc_cursor *cursor,
+	      krb5_creds *creds)
+{
+    struct cred_ctx *ctx = *cursor;
+    krb5_scache *s = SCACHE(id);
+    krb5_error_code ret;
+    sqlite_uint64 oid;
+    const void *data = NULL;
+    size_t len = 0;
+
+next:
+    ret = sqlite3_step(ctx->stmt);
+    if (ret == SQLITE_DONE) {
+	krb5_clear_error_message(context);
+        return KRB5_CC_END;
+    } else if (ret != SQLITE_ROW) {
+	krb5_set_error_message(context, KRB5_CC_IO,
+			       N_("scache Database failed: %s", ""),
+			       sqlite3_errmsg(s->db));
+        return KRB5_CC_IO;
+    }
+
+    oid = sqlite3_column_int64(ctx->stmt, 0);
+
+    /* read cred from credentials table */
+
+    sqlite3_bind_int(ctx->credstmt, 1, oid);
+
+    ret = sqlite3_step(ctx->credstmt);
+    if (ret != SQLITE_ROW) {
+	sqlite3_reset(ctx->credstmt);
+	goto next;
+    }
+
+    if (sqlite3_column_type(ctx->credstmt, 0) != SQLITE_BLOB) {
+	krb5_set_error_message(context, KRB5_CC_END,
+			       N_("credential of wrong type for SCC:%s:%s", ""),
+			       s->name, s->file);
+	sqlite3_reset(ctx->credstmt);
+	return KRB5_CC_END;
+    }
+
+    data = sqlite3_column_blob(ctx->credstmt, 0);
+    len = sqlite3_column_bytes(ctx->credstmt, 0);
+
+    ret = decode_creds(context, data, len, creds);
+    sqlite3_reset(ctx->credstmt);
+    return ret;
+}
+
+static krb5_error_code KRB5_CALLCONV
+scc_end_get (krb5_context context,
+	     krb5_ccache id,
+	     krb5_cc_cursor *cursor)
+{
+    struct cred_ctx *ctx = *cursor;
+    krb5_scache *s = SCACHE(id);
+
+    sqlite3_finalize(ctx->stmt);
+    sqlite3_finalize(ctx->credstmt);
+
+    exec_stmt(context, s->db, ctx->drop, 0);
+
+    free(ctx->drop);
+    free(ctx);
+
+    return 0;
+}
+
+static krb5_error_code KRB5_CALLCONV
+scc_remove_cred(krb5_context context,
+		 krb5_ccache id,
+		 krb5_flags which,
+		 krb5_creds *mcreds)
+{
+    krb5_scache *s = SCACHE(id);
+    krb5_error_code ret;
+    sqlite3_stmt *stmt;
+    sqlite_uint64 credid = 0;
+    const void *data = NULL;
+    size_t len = 0;
+
+    ret = make_database(context, s);
+    if (ret)
+	return ret;
+
+    ret = prepare_stmt(context, s->db, &stmt,
+		       "SELECT cred,oid FROM credentials "
+		       "WHERE cid = ?");
+    if (ret)
+	return ret;
+
+    sqlite3_bind_int(stmt, 1, s->cid);
+
+    /* find credential... */
+    while (1) {
+	krb5_creds creds;
+
+	ret = sqlite3_step(stmt);
+	if (ret == SQLITE_DONE) {
+	    ret = 0;
+	    break;
+	} else if (ret != SQLITE_ROW) {
+	    ret = KRB5_CC_IO;
+	    krb5_set_error_message(context, ret,
+				   N_("scache Database failed: %s", ""),
+				   sqlite3_errmsg(s->db));
+	    break;
+	}
+
+	if (sqlite3_column_type(stmt, 0) != SQLITE_BLOB) {
+	    ret = KRB5_CC_END;
+	    krb5_set_error_message(context, ret,
+				   N_("Credential of wrong type "
+				      "for SCC:%s:%s", ""),
+				   s->name, s->file);
+	    break;
+	}
+
+	data = sqlite3_column_blob(stmt, 0);
+	len = sqlite3_column_bytes(stmt, 0);
+
+	ret = decode_creds(context, data, len, &creds);
+	if (ret)
+	    break;
+
+	ret = krb5_compare_creds(context, which, mcreds, &creds);
+	krb5_free_cred_contents(context, &creds);
+	if (ret) {
+	    credid = sqlite3_column_int64(stmt, 1);
+	    ret = 0;
+	    break;
+	}
+    }
+
+    sqlite3_finalize(stmt);
+
+    if (id) {
+	ret = prepare_stmt(context, s->db, &stmt,
+			   "DELETE FROM credentials WHERE oid=?");
+	if (ret)
+	    return ret;
+	sqlite3_bind_int(stmt, 1, credid);
+
+	do {
+	    ret = sqlite3_step(stmt);
+	} while (ret == SQLITE_ROW);
+	sqlite3_finalize(stmt);
+	if (ret != SQLITE_DONE) {
+	    ret = KRB5_CC_IO;
+	    krb5_set_error_message(context, ret,
+				   N_("failed to delete scache credental", ""));
+	} else
+	    ret = 0;
+    }
+
+    return ret;
+}
+
+static krb5_error_code KRB5_CALLCONV
+scc_set_flags(krb5_context context,
+	      krb5_ccache id,
+	      krb5_flags flags)
+{
+    return 0; /* XXX */
+}
+
+struct cache_iter {
+    char *drop;
+    sqlite3 *db;
+    sqlite3_stmt *stmt;
+};
+
+static krb5_error_code KRB5_CALLCONV
+scc_get_cache_first(krb5_context context, krb5_cc_cursor *cursor)
+{
+    struct cache_iter *ctx;
+    krb5_error_code ret;
+    char *name = NULL, *str = NULL;
+
+    *cursor = NULL;
+
+    ctx = calloc(1, sizeof(*ctx));
+    if (ctx == NULL) {
+	krb5_set_error_message(context, ENOMEM,
+			       N_("malloc: out of memory", ""));
+	return ENOMEM;
+    }
+
+    ret = default_db(context, &ctx->db);
+    if (ctx->db == NULL) {
+	free(ctx);
+	return ret;
+    }
+
+    ret = asprintf(&name, "cacheIteration%pPid%d",
+                   ctx, (int)getpid());
+    if (ret < 0 || name == NULL) {
+	krb5_set_error_message(context, ENOMEM,
+			       N_("malloc: out of memory", ""));
+	sqlite3_close(ctx->db);
+	free(ctx);
+	return ENOMEM;
+    }
+
+    ret = asprintf(&ctx->drop, "DROP TABLE %s", name);
+    if (ret < 0 || ctx->drop == NULL) {
+	krb5_set_error_message(context, ENOMEM,
+			       N_("malloc: out of memory", ""));
+	sqlite3_close(ctx->db);
+	free(name);
+	free(ctx);
+	return ENOMEM;
+    }
+
+    ret = asprintf(&str, "CREATE TEMPORARY TABLE %s AS SELECT name FROM caches",
+	     name);
+    if (ret < 0 || str == NULL) {
+	krb5_set_error_message(context, ENOMEM,
+			       N_("malloc: out of memory", ""));
+	sqlite3_close(ctx->db);
+	free(name);
+	free(ctx->drop);
+	free(ctx);
+	return ENOMEM;
+    }
+
+    ret = exec_stmt(context, ctx->db, str, KRB5_CC_IO);
+    free(str);
+    str = NULL;
+    if (ret) {
+	sqlite3_close(ctx->db);
+	free(name);
+	free(ctx->drop);
+	free(ctx);
+	return ret;
+    }
+
+    ret = asprintf(&str, "SELECT name FROM %s", name);
+    free(name);
+    if (ret < 0 || str == NULL) {
+	exec_stmt(context, ctx->db, ctx->drop, 0);
+	sqlite3_close(ctx->db);
+	free(name);
+	free(ctx->drop);
+	free(ctx);
+	return ENOMEM;
+    }
+
+    ret = prepare_stmt(context, ctx->db, &ctx->stmt, str);
+    free(str);
+    if (ret) {
+	exec_stmt(context, ctx->db, ctx->drop, 0);
+	sqlite3_close(ctx->db);
+	free(ctx->drop);
+	free(ctx);
+	return ret;
+    }
+
+    *cursor = ctx;
+
+    return 0;
+}
+
+static krb5_error_code KRB5_CALLCONV
+scc_get_cache_next(krb5_context context,
+		   krb5_cc_cursor cursor,
+		   krb5_ccache *id)
+{
+    struct cache_iter *ctx = cursor;
+    krb5_error_code ret;
+    const char *name;
+
+again:
+    ret = sqlite3_step(ctx->stmt);
+    if (ret == SQLITE_DONE) {
+	krb5_clear_error_message(context);
+        return KRB5_CC_END;
+    } else if (ret != SQLITE_ROW) {
+	krb5_set_error_message(context, KRB5_CC_IO,
+			       N_("Database failed: %s", ""),
+			       sqlite3_errmsg(ctx->db));
+        return KRB5_CC_IO;
+    }
+
+    if (sqlite3_column_type(ctx->stmt, 0) != SQLITE_TEXT)
+	goto again;
+
+    name = (const char *)sqlite3_column_text(ctx->stmt, 0);
+    if (name == NULL)
+	goto again;
+
+    ret = _krb5_cc_allocate(context, &krb5_scc_ops, id);
+    if (ret)
+	return ret;
+
+    return scc_resolve(context, id, name);
+}
+
+static krb5_error_code KRB5_CALLCONV
+scc_end_cache_get(krb5_context context, krb5_cc_cursor cursor)
+{
+    struct cache_iter *ctx = cursor;
+
+    exec_stmt(context, ctx->db, ctx->drop, 0);
+    sqlite3_finalize(ctx->stmt);
+    sqlite3_close(ctx->db);
+    free(ctx->drop);
+    free(ctx);
+    return 0;
+}
+
+static krb5_error_code KRB5_CALLCONV
+scc_move(krb5_context context, krb5_ccache from, krb5_ccache to)
+{
+    krb5_scache *sfrom = SCACHE(from);
+    krb5_scache *sto = SCACHE(to);
+    krb5_error_code ret;
+
+    if (strcmp(sfrom->file, sto->file) != 0) {
+	krb5_set_error_message(context, KRB5_CC_BADNAME,
+			       N_("Can't handle cross database "
+				  "credential move: %s -> %s", ""),
+			       sfrom->file, sto->file);
+	return KRB5_CC_BADNAME;
+    }
+
+    ret = make_database(context, sfrom);
+    if (ret)
+	return ret;
+
+    ret = exec_stmt(context, sfrom->db,
+		    "BEGIN IMMEDIATE TRANSACTION", KRB5_CC_IO);
+    if (ret) return ret;
+
+    if (sto->cid != SCACHE_INVALID_CID) {
+	/* drop old cache entry */
+
+	sqlite3_bind_int(sfrom->dcache, 1, sto->cid);
+	do {
+	    ret = sqlite3_step(sfrom->dcache);
+	} while (ret == SQLITE_ROW);
+	sqlite3_reset(sfrom->dcache);
+	if (ret != SQLITE_DONE) {
+	    krb5_set_error_message(context, KRB5_CC_IO,
+				   N_("Failed to delete old cache: %d", ""),
+				   (int)ret);
+	    goto rollback;
+	}
+    }
+
+    sqlite3_bind_text(sfrom->ucachen, 1, sto->name, -1, NULL);
+    sqlite3_bind_int(sfrom->ucachen, 2, sfrom->cid);
+
+    do {
+	ret = sqlite3_step(sfrom->ucachen);
+    } while (ret == SQLITE_ROW);
+    sqlite3_reset(sfrom->ucachen);
+    if (ret != SQLITE_DONE) {
+	krb5_set_error_message(context, KRB5_CC_IO,
+			       N_("Failed to update new cache: %d", ""),
+			       (int)ret);
+	goto rollback;
+    }
+
+    sto->cid = sfrom->cid;
+
+    ret = exec_stmt(context, sfrom->db, "COMMIT", KRB5_CC_IO);
+    if (ret) return ret;
+
+    scc_free(sfrom);
+
+    return 0;
+
+rollback:
+    exec_stmt(context, sfrom->db, "ROLLBACK", 0);
+    scc_free(sfrom);
+
+    return KRB5_CC_IO;
+}
+
+static krb5_error_code KRB5_CALLCONV
+scc_get_default_name(krb5_context context, char **str)
+{
+    krb5_error_code ret;
+    char *name;
+
+    *str = NULL;
+
+    ret = get_def_name(context, &name);
+    if (ret)
+	return _krb5_expand_default_cc_name(context, KRB5_SCACHE_NAME, str);
+
+    ret = asprintf(str, "SCC:%s", name);
+    free(name);
+    if (ret < 0 || *str == NULL) {
+	krb5_set_error_message(context, ENOMEM,
+			       N_("malloc: out of memory", ""));
+	return ENOMEM;
+    }
+    return 0;
+}
+
+static krb5_error_code KRB5_CALLCONV
+scc_set_default(krb5_context context, krb5_ccache id)
+{
+    krb5_scache *s = SCACHE(id);
+    krb5_error_code ret;
+
+    if (s->cid == SCACHE_INVALID_CID) {
+	krb5_set_error_message(context, KRB5_CC_IO,
+			       N_("Trying to set a invalid cache "
+				  "as default %s", ""),
+			       s->name);
+	return KRB5_CC_IO;
+    }
+
+    ret = sqlite3_bind_text(s->umaster, 1, s->name, -1, NULL);
+    if (ret) {
+	sqlite3_reset(s->umaster);
+	krb5_set_error_message(context, KRB5_CC_IO,
+			       N_("Failed to set name of default cache", ""));
+	return KRB5_CC_IO;
+    }
+
+    do {
+	ret = sqlite3_step(s->umaster);
+    } while (ret == SQLITE_ROW);
+    sqlite3_reset(s->umaster);
+    if (ret != SQLITE_DONE) {
+	krb5_set_error_message(context, KRB5_CC_IO,
+			       N_("Failed to update default cache", ""));
+	return KRB5_CC_IO;
+    }
+
+    return 0;
+}
+
+/**
+ * Variable containing the SCC based credential cache implemention.
+ *
+ * @ingroup krb5_ccache
+ */
+
+KRB5_LIB_VARIABLE const krb5_cc_ops krb5_scc_ops = {
+    KRB5_CC_OPS_VERSION,
+    "SCC",
+    scc_get_name,
+    scc_resolve,
+    scc_gen_new,
+    scc_initialize,
+    scc_destroy,
+    scc_close,
+    scc_store_cred,
+    NULL, /* scc_retrieve */
+    scc_get_principal,
+    scc_get_first,
+    scc_get_next,
+    scc_end_get,
+    scc_remove_cred,
+    scc_set_flags,
+    NULL,
+    scc_get_cache_first,
+    scc_get_cache_next,
+    scc_end_cache_get,
+    scc_move,
+    scc_get_default_name,
+    scc_set_default
+};
+
+#endif