1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
#include <stdbool.h>
#include <sys/types.h>
#include "ipa_asn1.h"
#include "GetKeytabControl.h"
static bool encode_GetKeytabControl(GetKeytabControl_t *gkctrl,
void **buf, size_t *len)
{
asn_enc_rval_t rval;
char *buffer = NULL;
size_t buflen;
bool ret = false;
/* dry run to compute the size */
rval = der_encode(&asn_DEF_GetKeytabControl, gkctrl, NULL, NULL);
if (rval.encoded == -1) goto done;
buflen = rval.encoded;
buffer = malloc(buflen);
if (!buffer) goto done;
/* now for real */
rval = der_encode_to_buffer(&asn_DEF_GetKeytabControl,
gkctrl, buffer, buflen);
if (rval.encoded == -1) goto done;
*buf = buffer;
*len = buflen;
ret = true;
done:
if (!ret) {
free(buffer);
}
return ret;
}
bool ipaasn1_enc_getkt(bool newkt, const char *princ, const char *pwd,
long *etypes, int numtypes, void **buf, size_t *len)
{
GetKeytabControl_t gkctrl = { 0 };
bool ret = false;
if (newkt) {
gkctrl.present = GetKeytabControl_PR_newkeys;
if (OCTET_STRING_fromString(&gkctrl.choice.newkeys.serviceIdentity,
princ) != 0) goto done;
for (int i = 0; i < numtypes; i++) {
long *tmp;
tmp = malloc(sizeof(long));
if (!tmp) goto done;
*tmp = etypes[i];
ASN_SEQUENCE_ADD(&gkctrl.choice.newkeys.enctypes.list, tmp);
}
if (pwd) {
gkctrl.choice.newkeys.password =
OCTET_STRING_new_fromBuf(&asn_DEF_OCTET_STRING, pwd, -1);
if (!gkctrl.choice.newkeys.password) goto done;
}
} else {
gkctrl.present = GetKeytabControl_PR_curkeys;
if (OCTET_STRING_fromString(&gkctrl.choice.curkeys.serviceIdentity,
princ) != 0) goto done;
}
ret = encode_GetKeytabControl(&gkctrl, buf, len);
done:
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_GetKeytabControl, &gkctrl);
return ret;
}
bool ipaasn1_enc_getktreply(int kvno, struct keys_container *keys,
void **buf, size_t *len)
{
GetKeytabControl_t gkctrl = { 0 };
bool ret = false;
KrbKey_t *KK;
gkctrl.present = GetKeytabControl_PR_reply;
gkctrl.choice.reply.newkvno = kvno;
for (int i = 0; i < keys->nkeys; i++) {
KK = calloc(1, sizeof(KrbKey_t));
if (!KK) goto done;
KK->key.type = keys->ksdata[i].key.enctype;
KK->key.value.buf = malloc(keys->ksdata[i].key.length);
if (!KK->key.value.buf) goto done;
memcpy(KK->key.value.buf,
keys->ksdata[i].key.contents, keys->ksdata[i].key.length);
KK->key.value.size = keys->ksdata[i].key.length;
if (keys->ksdata[i].salt.data != NULL) {
KK->salt = calloc(1, sizeof(TypeValuePair_t));
if (!KK->salt) goto done;
KK->salt->type = keys->ksdata[i].salttype;
KK->salt->value.buf = malloc(keys->ksdata[i].salt.length);
if (!KK->salt->value.buf) goto done;
memcpy(KK->salt->value.buf,
keys->ksdata[i].salt.data, keys->ksdata[i].salt.length);
KK->salt->value.size = keys->ksdata[i].salt.length;
}
/* KK->key.s2kparams not used for now */
ASN_SEQUENCE_ADD(&gkctrl.choice.reply.keys.list, KK);
}
ret = encode_GetKeytabControl(&gkctrl, buf, len);
KK = NULL;
done:
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_GetKeytabControl, &gkctrl);
if (KK) {
free(KK->key.value.buf);
if (KK->salt) {
free(KK->salt->value.buf);
free(KK->salt);
}
free(KK);
}
return ret;
}
static GetKeytabControl_t *decode_GetKeytabControl(void *buf, size_t len)
{
GetKeytabControl_t *gkctrl = NULL;
asn_dec_rval_t rval;
rval = ber_decode(NULL, &asn_DEF_GetKeytabControl,
(void **)&gkctrl, buf, len);
if (rval.code == RC_OK) {
return gkctrl;
}
return NULL;
}
bool ipaasn1_dec_getkt(void *buf, size_t len, bool *newkt,
char **princ, char **pwd, long **etypes, int *numtypes)
{
GetKeytabControl_t *gkctrl;
bool ret = false;
int num;
gkctrl = decode_GetKeytabControl(buf, len);
if (!gkctrl) return false;
switch (gkctrl->present) {
case GetKeytabControl_PR_newkeys:
*newkt = true;
*princ = strndup((char *)gkctrl->choice.newkeys.serviceIdentity.buf,
gkctrl->choice.newkeys.serviceIdentity.size);
if (!*princ) goto done;
num = gkctrl->choice.newkeys.enctypes.list.count;
*etypes = malloc(num * sizeof(long));
*numtypes = 0;
if (!*etypes) goto done;
for (int i = 0; i < num; i++) {
(*etypes)[i] = *gkctrl->choice.newkeys.enctypes.list.array[i];
(*numtypes)++;
}
if (gkctrl->choice.newkeys.password) {
*pwd = strndup((char *)gkctrl->choice.newkeys.password->buf,
gkctrl->choice.newkeys.password->size);
if (!*pwd) goto done;
}
break;
case GetKeytabControl_PR_curkeys:
*newkt = false;
*princ = strndup((char *)gkctrl->choice.curkeys.serviceIdentity.buf,
gkctrl->choice.curkeys.serviceIdentity.size);
if (!*princ) goto done;
break;
default:
goto done;
}
ret = true;
done:
ASN_STRUCT_FREE(asn_DEF_GetKeytabControl, gkctrl);
return ret;
}
bool ipaasn1_dec_getktreply(void *buf, size_t len,
int *kvno, struct keys_container *keys)
{
GetKeytabControl_t *gkctrl;
struct KrbKey *KK;
bool ret = false;
int nkeys;
gkctrl = decode_GetKeytabControl(buf, len);
if (!gkctrl) return false;
if (gkctrl->present != GetKeytabControl_PR_reply) goto done;
*kvno = gkctrl->choice.reply.newkvno;
nkeys = gkctrl->choice.reply.keys.list.count;
keys->nkeys = 0;
keys->ksdata = calloc(nkeys, sizeof(struct krb_key_salt));
if (!keys->ksdata) goto done;
for (int i = 0; i < nkeys; i++) {
KK = gkctrl->choice.reply.keys.list.array[i];
keys->ksdata[i].enctype = KK->key.type;
keys->ksdata[i].key.enctype = KK->key.type;
keys->ksdata[i].key.contents = malloc(KK->key.value.size);
if (!keys->ksdata[i].key.contents) goto done;
memcpy(keys->ksdata[i].key.contents,
KK->key.value.buf, KK->key.value.size);
keys->ksdata[i].key.length = KK->key.value.size;
if (KK->salt) {
keys->ksdata[i].salttype = KK->salt->type;
keys->ksdata[i].salt.data = malloc(KK->salt->value.size);
if (!keys->ksdata[i].salt.data) goto done;
memcpy(keys->ksdata[i].salt.data,
KK->salt->value.buf, KK->salt->value.size);
keys->ksdata[i].salt.length = KK->salt->value.size;
}
/* KK->s2kparams is ignored for now */
keys->nkeys++;
}
ret = true;
done:
ASN_STRUCT_FREE(asn_DEF_GetKeytabControl, gkctrl);
return ret;
}
|
