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-rw-r--r--third_party/heimdal/lib/krb5/replay.c328
1 files changed, 328 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/krb5/replay.c b/third_party/heimdal/lib/krb5/replay.c
new file mode 100644
index 0000000..2fec8af
--- /dev/null
+++ b/third_party/heimdal/lib/krb5/replay.c
@@ -0,0 +1,328 @@
+/*
+ * Copyright (c) 1997-2001 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 <vis.h>
+
+struct krb5_rcache_data {
+ char *name;
+};
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_rc_resolve(krb5_context context,
+ krb5_rcache id,
+ const char *name)
+{
+ id->name = strdup(name);
+ if(id->name == NULL) {
+ krb5_set_error_message(context, KRB5_RC_MALLOC,
+ N_("malloc: out of memory", ""));
+ return KRB5_RC_MALLOC;
+ }
+ return 0;
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_rc_resolve_type(krb5_context context,
+ krb5_rcache *id,
+ const char *type)
+{
+ *id = NULL;
+ if (strcmp(type, "FILE") != 0) {
+ krb5_set_error_message (context, KRB5_RC_TYPE_NOTFOUND,
+ N_("replay cache type %s not supported", ""),
+ type);
+ return KRB5_RC_TYPE_NOTFOUND;
+ }
+ *id = calloc(1, sizeof(**id));
+ if(*id == NULL) {
+ krb5_set_error_message(context, KRB5_RC_MALLOC,
+ N_("malloc: out of memory", ""));
+ return KRB5_RC_MALLOC;
+ }
+ return 0;
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_rc_resolve_full(krb5_context context,
+ krb5_rcache *id,
+ const char *string_name)
+{
+ krb5_error_code ret;
+
+ *id = NULL;
+
+ if (strncmp(string_name, "FILE:", 5) != 0) {
+ krb5_set_error_message(context, KRB5_RC_TYPE_NOTFOUND,
+ N_("replay cache type %s not supported", ""),
+ string_name);
+ return KRB5_RC_TYPE_NOTFOUND;
+ }
+ ret = krb5_rc_resolve_type(context, id, "FILE");
+ if(ret)
+ return ret;
+ ret = krb5_rc_resolve(context, *id, string_name + 5);
+ if (ret) {
+ krb5_rc_close(context, *id);
+ *id = NULL;
+ }
+ return ret;
+}
+
+KRB5_LIB_FUNCTION const char* KRB5_LIB_CALL
+krb5_rc_default_name(krb5_context context)
+{
+ return "FILE:/var/run/default_rcache";
+}
+
+KRB5_LIB_FUNCTION const char* KRB5_LIB_CALL
+krb5_rc_default_type(krb5_context context)
+{
+ return "FILE";
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_rc_default(krb5_context context,
+ krb5_rcache *id)
+{
+ return krb5_rc_resolve_full(context, id, krb5_rc_default_name(context));
+}
+
+struct rc_entry{
+ time_t stamp;
+ unsigned char data[16];
+};
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_rc_initialize(krb5_context context,
+ krb5_rcache id,
+ krb5_deltat auth_lifespan)
+{
+ FILE *f = fopen(id->name, "w");
+ struct rc_entry tmp;
+ int ret;
+
+ if(f == NULL) {
+ char buf[128];
+ ret = errno;
+ rk_strerror_r(ret, buf, sizeof(buf));
+ krb5_set_error_message(context, ret, "open(%s): %s", id->name, buf);
+ return ret;
+ }
+ memset(&tmp, 0, sizeof(tmp));
+ tmp.stamp = auth_lifespan;
+ fwrite(&tmp, 1, sizeof(tmp), f);
+ fclose(f);
+ return 0;
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_rc_recover(krb5_context context,
+ krb5_rcache id)
+{
+ return 0;
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_rc_destroy(krb5_context context,
+ krb5_rcache id)
+{
+ int ret;
+
+ if(remove(id->name) < 0) {
+ char buf[128];
+ ret = errno;
+ rk_strerror_r(ret, buf, sizeof(buf));
+ krb5_set_error_message(context, ret, "remove(%s): %s", id->name, buf);
+ return ret;
+ }
+ return krb5_rc_close(context, id);
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_rc_close(krb5_context context,
+ krb5_rcache id)
+{
+ free(id->name);
+ free(id);
+ return 0;
+}
+
+static void
+checksum_authenticator(Authenticator *auth, void *data)
+{
+ EVP_MD_CTX *m = EVP_MD_CTX_create();
+ unsigned i;
+
+ EVP_DigestInit_ex(m, EVP_md5(), NULL);
+
+ EVP_DigestUpdate(m, auth->crealm, strlen(auth->crealm));
+ for(i = 0; i < auth->cname.name_string.len; i++)
+ EVP_DigestUpdate(m, auth->cname.name_string.val[i],
+ strlen(auth->cname.name_string.val[i]));
+ EVP_DigestUpdate(m, &auth->ctime, sizeof(auth->ctime));
+ EVP_DigestUpdate(m, &auth->cusec, sizeof(auth->cusec));
+
+ EVP_DigestFinal_ex(m, data, NULL);
+ EVP_MD_CTX_destroy(m);
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_rc_store(krb5_context context,
+ krb5_rcache id,
+ krb5_donot_replay *rep)
+{
+ struct rc_entry ent, tmp;
+ time_t t;
+ FILE *f;
+ int ret;
+ size_t count;
+
+ ent.stamp = time(NULL);
+ checksum_authenticator(rep, ent.data);
+ f = fopen(id->name, "r");
+ if(f == NULL) {
+ char buf[128];
+ ret = errno;
+ rk_strerror_r(ret, buf, sizeof(buf));
+ krb5_set_error_message(context, ret, "open(%s): %s", id->name, buf);
+ return ret;
+ }
+ rk_cloexec_file(f);
+ count = fread(&tmp, sizeof(ent), 1, f);
+ if (count != 1) {
+ fclose(f);
+ return KRB5_RC_IO_UNKNOWN;
+ }
+ t = ent.stamp - tmp.stamp;
+ while(fread(&tmp, sizeof(ent), 1, f)){
+ if(tmp.stamp < t)
+ continue;
+ if(memcmp(tmp.data, ent.data, sizeof(ent.data)) == 0){
+ fclose(f);
+ krb5_clear_error_message (context);
+ return KRB5_RC_REPLAY;
+ }
+ }
+ if(ferror(f)){
+ char buf[128];
+ ret = errno;
+ fclose(f);
+ rk_strerror_r(ret, buf, sizeof(buf));
+ krb5_set_error_message(context, ret, "%s: %s",
+ id->name, buf);
+ return ret;
+ }
+ fclose(f);
+ f = fopen(id->name, "a");
+ if(f == NULL) {
+ char buf[128];
+ rk_strerror_r(errno, buf, sizeof(buf));
+ krb5_set_error_message(context, KRB5_RC_IO_UNKNOWN,
+ "open(%s): %s", id->name, buf);
+ return KRB5_RC_IO_UNKNOWN;
+ }
+ fwrite(&ent, 1, sizeof(ent), f);
+ fclose(f);
+ return 0;
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_rc_expunge(krb5_context context,
+ krb5_rcache id)
+{
+ return 0;
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_rc_get_lifespan(krb5_context context,
+ krb5_rcache id,
+ krb5_deltat *auth_lifespan)
+{
+ FILE *f = fopen(id->name, "r");
+ int r;
+ struct rc_entry ent;
+ r = fread(&ent, sizeof(ent), 1, f);
+ fclose(f);
+ if(r){
+ *auth_lifespan = ent.stamp;
+ return 0;
+ }
+ krb5_clear_error_message (context);
+ return KRB5_RC_IO_UNKNOWN;
+}
+
+KRB5_LIB_FUNCTION const char* KRB5_LIB_CALL
+krb5_rc_get_name(krb5_context context,
+ krb5_rcache id)
+{
+ return id->name;
+}
+
+KRB5_LIB_FUNCTION const char* KRB5_LIB_CALL
+krb5_rc_get_type(krb5_context context,
+ krb5_rcache id)
+{
+ return "FILE";
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_get_server_rcache(krb5_context context,
+ const krb5_data *piece,
+ krb5_rcache *id)
+{
+ krb5_rcache rcache;
+ krb5_error_code ret;
+
+ char *tmp = malloc(4 * piece->length + 1);
+ char *name;
+
+ if (tmp == NULL)
+ return krb5_enomem(context);
+ strvisx(tmp, piece->data, piece->length, VIS_WHITE | VIS_OCTAL);
+#ifdef HAVE_GETEUID
+ ret = asprintf(&name, "FILE:rc_%s_%u", tmp, (unsigned)geteuid());
+#else
+ ret = asprintf(&name, "FILE:rc_%s", tmp);
+#endif
+ free(tmp);
+ if (ret < 0 || name == NULL)
+ return krb5_enomem(context);
+
+ ret = krb5_rc_resolve_full(context, &rcache, name);
+ free(name);
+ if(ret)
+ return ret;
+ *id = rcache;
+ return ret;
+}
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