2 * Copyright (c) 2006 - 2007 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include "krb5_locl.h"
39 struct PAC_INFO_BUFFER {
49 struct PAC_INFO_BUFFER buffers[1];
52 struct krb5_pac_data {
55 struct PAC_INFO_BUFFER *server_checksum;
56 struct PAC_INFO_BUFFER *privsvr_checksum;
57 struct PAC_INFO_BUFFER *logon_name;
60 #define PAC_ALIGNMENT 8
62 #define PACTYPE_SIZE 8
63 #define PAC_INFO_BUFFER_SIZE 16
65 #define PAC_SERVER_CHECKSUM 6
66 #define PAC_PRIVSVR_CHECKSUM 7
67 #define PAC_LOGON_NAME 10
68 #define PAC_CONSTRAINED_DELEGATION 11
70 #define CHECK(r,f,l) \
72 if (((r) = f ) != 0) { \
73 krb5_clear_error_string(context); \
78 static const char zeros[PAC_ALIGNMENT] = { 0 };
85 krb5_pac_parse(krb5_context context, const void *ptr, size_t len,
90 krb5_storage *sp = NULL;
91 uint32_t i, tmp, tmp2, header_end;
93 p = calloc(1, sizeof(*p));
96 krb5_set_error_message(context, ret, "malloc: out of memory");
100 sp = krb5_storage_from_readonly_mem(ptr, len);
103 krb5_set_error_message(context, ret, "malloc: out of memory");
106 krb5_storage_set_flags(sp, KRB5_STORAGE_BYTEORDER_LE);
108 CHECK(ret, krb5_ret_uint32(sp, &tmp), out);
109 CHECK(ret, krb5_ret_uint32(sp, &tmp2), out);
111 ret = EINVAL; /* Too few buffers */
112 krb5_set_error_message(context, ret, "PAC have too few buffer");
116 ret = EINVAL; /* Wrong version */
117 krb5_set_error_message(context, ret, "PAC have wrong version");
122 sizeof(*p->pac) + (sizeof(p->pac->buffers[0]) * (tmp - 1)));
123 if (p->pac == NULL) {
125 krb5_set_error_message(context, ret, "malloc: out of memory");
129 p->pac->numbuffers = tmp;
130 p->pac->version = tmp2;
132 header_end = PACTYPE_SIZE + (PAC_INFO_BUFFER_SIZE * p->pac->numbuffers);
133 if (header_end > len) {
138 for (i = 0; i < p->pac->numbuffers; i++) {
139 CHECK(ret, krb5_ret_uint32(sp, &p->pac->buffers[i].type), out);
140 CHECK(ret, krb5_ret_uint32(sp, &p->pac->buffers[i].buffersize), out);
141 CHECK(ret, krb5_ret_uint32(sp, &p->pac->buffers[i].offset_lo), out);
142 CHECK(ret, krb5_ret_uint32(sp, &p->pac->buffers[i].offset_hi), out);
144 /* consistency checks */
145 if (p->pac->buffers[i].offset_lo & (PAC_ALIGNMENT - 1)) {
147 krb5_set_error_message(context, ret, "PAC out of allignment");
150 if (p->pac->buffers[i].offset_hi) {
152 krb5_set_error_message(context, ret, "PAC high offset set");
155 if (p->pac->buffers[i].offset_lo > len) {
157 krb5_set_error_message(context, ret, "PAC offset off end");
160 if (p->pac->buffers[i].offset_lo < header_end) {
162 krb5_set_error_message(context, ret, "PAC offset inside header: %lu %lu",
163 (unsigned long)p->pac->buffers[i].offset_lo,
164 (unsigned long)header_end);
167 if (p->pac->buffers[i].buffersize > len - p->pac->buffers[i].offset_lo){
169 krb5_set_error_message(context, ret, "PAC length off end");
173 /* let save pointer to data we need later */
174 if (p->pac->buffers[i].type == PAC_SERVER_CHECKSUM) {
175 if (p->server_checksum) {
177 krb5_set_error_message(context, ret, "PAC have two server checksums");
180 p->server_checksum = &p->pac->buffers[i];
181 } else if (p->pac->buffers[i].type == PAC_PRIVSVR_CHECKSUM) {
182 if (p->privsvr_checksum) {
184 krb5_set_error_message(context, ret, "PAC have two KDC checksums");
187 p->privsvr_checksum = &p->pac->buffers[i];
188 } else if (p->pac->buffers[i].type == PAC_LOGON_NAME) {
191 krb5_set_error_message(context, ret, "PAC have two logon names");
194 p->logon_name = &p->pac->buffers[i];
198 ret = krb5_data_copy(&p->data, ptr, len);
202 krb5_storage_free(sp);
209 krb5_storage_free(sp);
221 krb5_pac_init(krb5_context context, krb5_pac *pac)
226 p = calloc(1, sizeof(*p));
228 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
232 p->pac = calloc(1, sizeof(*p->pac));
233 if (p->pac == NULL) {
235 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
239 ret = krb5_data_alloc(&p->data, PACTYPE_SIZE);
243 krb5_set_error_message(context, ret, "malloc: out of memory");
253 krb5_pac_add_buffer(krb5_context context, krb5_pac p,
254 uint32_t type, const krb5_data *data)
258 size_t len, offset, header_end, old_end;
261 len = p->pac->numbuffers;
263 ptr = realloc(p->pac,
264 sizeof(*p->pac) + (sizeof(p->pac->buffers[0]) * len));
266 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
271 for (i = 0; i < len; i++)
272 p->pac->buffers[i].offset_lo += PAC_INFO_BUFFER_SIZE;
274 offset = p->data.length + PAC_INFO_BUFFER_SIZE;
276 p->pac->buffers[len].type = type;
277 p->pac->buffers[len].buffersize = data->length;
278 p->pac->buffers[len].offset_lo = offset;
279 p->pac->buffers[len].offset_hi = 0;
281 old_end = p->data.length;
282 len = p->data.length + data->length + PAC_INFO_BUFFER_SIZE;
283 if (len < p->data.length) {
284 krb5_set_error_message(context, EINVAL, "integer overrun");
288 /* align to PAC_ALIGNMENT */
289 len = ((len + PAC_ALIGNMENT - 1) / PAC_ALIGNMENT) * PAC_ALIGNMENT;
291 ret = krb5_data_realloc(&p->data, len);
293 krb5_set_error_message(context, ret, "malloc: out of memory");
298 * make place for new PAC INFO BUFFER header
300 header_end = PACTYPE_SIZE + (PAC_INFO_BUFFER_SIZE * p->pac->numbuffers);
301 memmove((unsigned char *)p->data.data + header_end + PAC_INFO_BUFFER_SIZE,
302 (unsigned char *)p->data.data + header_end ,
303 old_end - header_end);
304 memset((unsigned char *)p->data.data + header_end, 0, PAC_INFO_BUFFER_SIZE);
307 * copy in new data part
310 memcpy((unsigned char *)p->data.data + offset,
311 data->data, data->length);
312 memset((unsigned char *)p->data.data + offset + data->length,
313 0, p->data.length - offset - data->length);
315 p->pac->numbuffers += 1;
321 krb5_pac_get_buffer(krb5_context context, krb5_pac p,
322 uint32_t type, krb5_data *data)
328 * Hide the checksums from external consumers
331 if (type == PAC_PRIVSVR_CHECKSUM || type == PAC_SERVER_CHECKSUM) {
332 ret = krb5_data_alloc(data, 16);
334 krb5_set_error_message(context, ret, "malloc: out of memory");
337 memset(data->data, 0, data->length);
341 for (i = 0; i < p->pac->numbuffers; i++) {
342 size_t len = p->pac->buffers[i].buffersize;
343 size_t offset = p->pac->buffers[i].offset_lo;
345 if (p->pac->buffers[i].type != type)
348 ret = krb5_data_copy(data, (unsigned char *)p->data.data + offset, len);
350 krb5_set_error_message(context, ret, "malloc: out of memory");
355 krb5_set_error_message(context, ENOENT, "No PAC buffer of type %lu was found",
356 (unsigned long)type);
365 krb5_pac_get_types(krb5_context context,
372 *types = calloc(p->pac->numbuffers, sizeof(*types));
373 if (*types == NULL) {
375 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
378 for (i = 0; i < p->pac->numbuffers; i++)
379 (*types)[i] = p->pac->buffers[i].type;
380 *len = p->pac->numbuffers;
390 krb5_pac_free(krb5_context context, krb5_pac pac)
392 krb5_data_free(&pac->data);
401 static krb5_error_code
402 verify_checksum(krb5_context context,
403 const struct PAC_INFO_BUFFER *sig,
404 const krb5_data *data,
405 void *ptr, size_t len,
406 const krb5_keyblock *key)
408 krb5_crypto crypto = NULL;
409 krb5_storage *sp = NULL;
414 memset(&cksum, 0, sizeof(cksum));
416 sp = krb5_storage_from_mem((char *)data->data + sig->offset_lo,
419 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
422 krb5_storage_set_flags(sp, KRB5_STORAGE_BYTEORDER_LE);
424 CHECK(ret, krb5_ret_uint32(sp, &type), out);
425 cksum.cksumtype = type;
426 cksum.checksum.length =
427 sig->buffersize - krb5_storage_seek(sp, 0, SEEK_CUR);
428 cksum.checksum.data = malloc(cksum.checksum.length);
429 if (cksum.checksum.data == NULL) {
431 krb5_set_error_message(context, ret, "malloc: out of memory");
434 ret = krb5_storage_read(sp, cksum.checksum.data, cksum.checksum.length);
435 if (ret != cksum.checksum.length) {
437 krb5_set_error_message(context, ret, "PAC checksum missing checksum");
441 if (!krb5_checksum_is_keyed(context, cksum.cksumtype)) {
443 krb5_set_error_message(context, ret, "Checksum type %d not keyed",
448 ret = krb5_crypto_init(context, key, 0, &crypto);
452 ret = krb5_verify_checksum(context, crypto, KRB5_KU_OTHER_CKSUM,
454 free(cksum.checksum.data);
455 krb5_crypto_destroy(context, crypto);
456 krb5_storage_free(sp);
461 if (cksum.checksum.data)
462 free(cksum.checksum.data);
464 krb5_storage_free(sp);
466 krb5_crypto_destroy(context, crypto);
470 static krb5_error_code
471 create_checksum(krb5_context context,
472 const krb5_keyblock *key,
473 void *data, size_t datalen,
474 void *sig, size_t siglen)
476 krb5_crypto crypto = NULL;
480 ret = krb5_crypto_init(context, key, 0, &crypto);
484 ret = krb5_create_checksum(context, crypto, KRB5_KU_OTHER_CKSUM, 0,
485 data, datalen, &cksum);
486 krb5_crypto_destroy(context, crypto);
490 if (cksum.checksum.length != siglen) {
491 krb5_set_error_message(context, EINVAL, "pac checksum wrong length");
492 free_Checksum(&cksum);
496 memcpy(sig, cksum.checksum.data, siglen);
497 free_Checksum(&cksum);
507 #define NTTIME_EPOCH 0x019DB1DED53E8000LL
510 unix2nttime(time_t unix_time)
513 wt = unix_time * (uint64_t)10000000 + (uint64_t)NTTIME_EPOCH;
517 static krb5_error_code
518 verify_logonname(krb5_context context,
519 const struct PAC_INFO_BUFFER *logon_name,
520 const krb5_data *data,
522 krb5_const_principal principal)
526 uint32_t time1, time2;
531 sp = krb5_storage_from_readonly_mem((const char *)data->data + logon_name->offset_lo,
532 logon_name->buffersize);
534 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
538 krb5_storage_set_flags(sp, KRB5_STORAGE_BYTEORDER_LE);
540 CHECK(ret, krb5_ret_uint32(sp, &time1), out);
541 CHECK(ret, krb5_ret_uint32(sp, &time2), out);
545 t1 = unix2nttime(authtime);
546 t2 = ((uint64_t)time2 << 32) | time1;
548 krb5_storage_free(sp);
549 krb5_set_error_message(context, EINVAL, "PAC timestamp mismatch");
553 CHECK(ret, krb5_ret_uint16(sp, &len), out);
555 krb5_storage_free(sp);
556 krb5_set_error_message(context, EINVAL, "PAC logon name length missing");
562 krb5_storage_free(sp);
563 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
566 ret = krb5_storage_read(sp, s, len);
568 krb5_storage_free(sp);
569 krb5_set_error_message(context, EINVAL, "Failed to read PAC logon name");
572 krb5_storage_free(sp);
574 size_t ucs2len = len / 2;
577 unsigned int flags = WIND_RW_LE;
579 ucs2 = malloc(sizeof(ucs2[0]) * ucs2len);
581 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
584 ret = wind_ucs2read(s, len, &flags, ucs2, &ucs2len);
588 krb5_set_error_message(context, ret, "Failed to convert string to UCS-2");
591 ret = wind_ucs2utf8_length(ucs2, ucs2len, &u8len);
594 krb5_set_error_message(context, ret, "Failed to count length of UCS-2 string");
597 u8len += 1; /* Add space for NUL */
601 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
604 ret = wind_ucs2utf8(ucs2, ucs2len, s, &u8len);
607 krb5_set_error_message(context, ret, "Failed to convert to UTF-8");
611 ret = krb5_parse_name_flags(context, s, KRB5_PRINCIPAL_PARSE_NO_REALM, &p2);
616 if (krb5_principal_compare_any_realm(context, principal, p2) != TRUE) {
618 krb5_set_error_message(context, ret, "PAC logon name mismatch");
620 krb5_free_principal(context, p2);
630 static krb5_error_code
631 build_logon_name(krb5_context context,
633 krb5_const_principal principal,
642 t = unix2nttime(authtime);
644 krb5_data_zero(logon);
646 sp = krb5_storage_emem();
648 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
651 krb5_storage_set_flags(sp, KRB5_STORAGE_BYTEORDER_LE);
653 CHECK(ret, krb5_store_uint32(sp, t & 0xffffffff), out);
654 CHECK(ret, krb5_store_uint32(sp, t >> 32), out);
656 ret = krb5_unparse_name_flags(context, principal,
657 KRB5_PRINCIPAL_UNPARSE_NO_REALM, &s);
663 CHECK(ret, krb5_store_uint16(sp, len * 2), out);
665 #if 1 /* cheat for now */
666 s2 = malloc(len * 2);
672 for (i = 0; i < len; i++) {
678 /* write libwind code here */
681 ret = krb5_storage_write(sp, s2, len * 2);
683 if (ret != len * 2) {
687 ret = krb5_storage_to_data(sp, logon);
690 krb5_storage_free(sp);
694 krb5_storage_free(sp);
704 krb5_pac_verify(krb5_context context,
707 krb5_const_principal principal,
708 const krb5_keyblock *server,
709 const krb5_keyblock *privsvr)
713 if (pac->server_checksum == NULL) {
714 krb5_set_error_message(context, EINVAL, "PAC missing server checksum");
717 if (pac->privsvr_checksum == NULL) {
718 krb5_set_error_message(context, EINVAL, "PAC missing kdc checksum");
721 if (pac->logon_name == NULL) {
722 krb5_set_error_message(context, EINVAL, "PAC missing logon name");
726 ret = verify_logonname(context,
735 * in the service case, clean out data option of the privsvr and
736 * server checksum before checking the checksum.
741 ret = krb5_copy_data(context, &pac->data, ©);
745 if (pac->server_checksum->buffersize < 4)
747 if (pac->privsvr_checksum->buffersize < 4)
750 memset((char *)copy->data + pac->server_checksum->offset_lo + 4,
752 pac->server_checksum->buffersize - 4);
754 memset((char *)copy->data + pac->privsvr_checksum->offset_lo + 4,
756 pac->privsvr_checksum->buffersize - 4);
758 ret = verify_checksum(context,
759 pac->server_checksum,
764 krb5_free_data(context, copy);
769 ret = verify_checksum(context,
770 pac->privsvr_checksum,
772 (char *)pac->data.data
773 + pac->server_checksum->offset_lo + 4,
774 pac->server_checksum->buffersize - 4,
787 static krb5_error_code
788 fill_zeros(krb5_context context, krb5_storage *sp, size_t len)
795 if (l > sizeof(zeros))
797 sret = krb5_storage_write(sp, zeros, l);
799 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
807 static krb5_error_code
808 pac_checksum(krb5_context context,
809 const krb5_keyblock *key,
813 krb5_cksumtype cktype;
815 krb5_crypto crypto = NULL;
817 ret = krb5_crypto_init(context, key, 0, &crypto);
821 ret = krb5_crypto_get_checksum_type(context, crypto, &cktype);
822 krb5_crypto_destroy(context, crypto);
826 if (krb5_checksum_is_keyed(context, cktype) == FALSE) {
827 krb5_set_error_message(context, EINVAL, "PAC checksum type is not keyed");
831 ret = krb5_checksumsize(context, cktype, cksumsize);
835 *cksumtype = (uint32_t)cktype;
841 _krb5_pac_sign(krb5_context context,
844 krb5_principal principal,
845 const krb5_keyblock *server_key,
846 const krb5_keyblock *priv_key,
850 krb5_storage *sp = NULL, *spdata = NULL;
852 size_t server_size, priv_size;
853 uint32_t server_offset = 0, priv_offset = 0;
854 uint32_t server_cksumtype = 0, priv_cksumtype = 0;
858 krb5_data_zero(&logon);
860 if (p->logon_name == NULL)
862 if (p->server_checksum == NULL)
864 if (p->privsvr_checksum == NULL)
870 ptr = realloc(p->pac, sizeof(*p->pac) + (sizeof(p->pac->buffers[0]) * (p->pac->numbuffers + num - 1)));
872 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
877 if (p->logon_name == NULL) {
878 p->logon_name = &p->pac->buffers[p->pac->numbuffers++];
879 memset(p->logon_name, 0, sizeof(*p->logon_name));
880 p->logon_name->type = PAC_LOGON_NAME;
882 if (p->server_checksum == NULL) {
883 p->server_checksum = &p->pac->buffers[p->pac->numbuffers++];
884 memset(p->server_checksum, 0, sizeof(*p->server_checksum));
885 p->server_checksum->type = PAC_SERVER_CHECKSUM;
887 if (p->privsvr_checksum == NULL) {
888 p->privsvr_checksum = &p->pac->buffers[p->pac->numbuffers++];
889 memset(p->privsvr_checksum, 0, sizeof(*p->privsvr_checksum));
890 p->privsvr_checksum->type = PAC_PRIVSVR_CHECKSUM;
894 /* Calculate LOGON NAME */
895 ret = build_logon_name(context, authtime, principal, &logon);
899 /* Set lengths for checksum */
900 ret = pac_checksum(context, server_key, &server_cksumtype, &server_size);
903 ret = pac_checksum(context, priv_key, &priv_cksumtype, &priv_size);
908 sp = krb5_storage_emem();
910 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
913 krb5_storage_set_flags(sp, KRB5_STORAGE_BYTEORDER_LE);
915 spdata = krb5_storage_emem();
916 if (spdata == NULL) {
917 krb5_storage_free(sp);
918 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
921 krb5_storage_set_flags(spdata, KRB5_STORAGE_BYTEORDER_LE);
923 CHECK(ret, krb5_store_uint32(sp, p->pac->numbuffers), out);
924 CHECK(ret, krb5_store_uint32(sp, p->pac->version), out);
926 end = PACTYPE_SIZE + (PAC_INFO_BUFFER_SIZE * p->pac->numbuffers);
928 for (i = 0; i < p->pac->numbuffers; i++) {
935 if (p->pac->buffers[i].type == PAC_SERVER_CHECKSUM) {
936 len = server_size + 4;
937 server_offset = end + 4;
938 CHECK(ret, krb5_store_uint32(spdata, server_cksumtype), out);
939 CHECK(ret, fill_zeros(context, spdata, server_size), out);
940 } else if (p->pac->buffers[i].type == PAC_PRIVSVR_CHECKSUM) {
942 priv_offset = end + 4;
943 CHECK(ret, krb5_store_uint32(spdata, priv_cksumtype), out);
944 CHECK(ret, fill_zeros(context, spdata, priv_size), out);
945 } else if (p->pac->buffers[i].type == PAC_LOGON_NAME) {
946 len = krb5_storage_write(spdata, logon.data, logon.length);
947 if (logon.length != len) {
952 len = p->pac->buffers[i].buffersize;
953 ptr = (char *)p->data.data + p->pac->buffers[i].offset_lo;
955 sret = krb5_storage_write(spdata, ptr, len);
958 krb5_set_error_message(context, ret, "malloc: out of memory");
961 /* XXX if not aligned, fill_zeros */
965 CHECK(ret, krb5_store_uint32(sp, p->pac->buffers[i].type), out);
966 CHECK(ret, krb5_store_uint32(sp, len), out);
967 CHECK(ret, krb5_store_uint32(sp, end), out);
968 CHECK(ret, krb5_store_uint32(sp, 0), out);
970 /* advance data endpointer and align */
975 e = ((end + PAC_ALIGNMENT - 1) / PAC_ALIGNMENT) * PAC_ALIGNMENT;
977 CHECK(ret, fill_zeros(context, spdata, e - end), out);
984 /* assert (server_offset != 0 && priv_offset != 0); */
987 ret = krb5_storage_to_data(spdata, &d);
989 krb5_set_error_message(context, ret, "malloc: out of memory");
992 ret = krb5_storage_write(sp, d.data, d.length);
993 if (ret != d.length) {
996 krb5_set_error_message(context, ret, "malloc: out of memory");
1001 ret = krb5_storage_to_data(sp, &d);
1003 krb5_set_error_message(context, ret, "malloc: out of memory");
1009 ret = create_checksum(context, server_key,
1011 (char *)d.data + server_offset, server_size);
1017 ret = create_checksum(context, priv_key,
1018 (char *)d.data + server_offset, server_size,
1019 (char *)d.data + priv_offset, priv_size);
1028 krb5_data_free(&logon);
1029 krb5_storage_free(sp);
1030 krb5_storage_free(spdata);
1034 krb5_data_free(&logon);
1036 krb5_storage_free(sp);
1038 krb5_storage_free(spdata);