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comparison libtomcrypt/src/pk/asn1/der/sequence/der_encode_sequence_ex.c @ 1511:5916af64acd4 fuzz

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merge from main
author Matt Johnston <matt@ucc.asn.au>
date Sat, 17 Feb 2018 19:29:51 +0800
parents 6dba84798cd5
children
comparison
equal deleted inserted replaced
1457:32f990cc96b1 1511:5916af64acd4
3 * LibTomCrypt is a library that provides various cryptographic 3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner. 4 * algorithms in a highly modular and flexible manner.
5 * 5 *
6 * The library is free for all purposes without any express 6 * The library is free for all purposes without any express
7 * guarantee it works. 7 * guarantee it works.
8 *
9 * Tom St Denis, [email protected], http://libtom.org
10 */ 8 */
11 #include "tomcrypt.h" 9 #include "tomcrypt.h"
12 #include <stdarg.h>
13 10
14 11
15 /** 12 /**
16 @file der_encode_sequence_ex.c 13 @file der_encode_sequence_ex.c
17 ASN.1 DER, encode a SEQUENCE, Tom St Denis 14 ASN.1 DER, encode a SEQUENCE, Tom St Denis
21 18
22 /** 19 /**
23 Encode a SEQUENCE 20 Encode a SEQUENCE
24 @param list The list of items to encode 21 @param list The list of items to encode
25 @param inlen The number of items in the list 22 @param inlen The number of items in the list
26 @param out [out] The destination 23 @param out [out] The destination
27 @param outlen [in/out] The size of the output 24 @param outlen [in/out] The size of the output
28 @param type_of LTC_ASN1_SEQUENCE or LTC_ASN1_SET/LTC_ASN1_SETOF 25 @param type_of LTC_ASN1_SEQUENCE or LTC_ASN1_SET/LTC_ASN1_SETOF
29 @return CRYPT_OK on success 26 @return CRYPT_OK on success
30 */ 27 */
31 int der_encode_sequence_ex(ltc_asn1_list *list, unsigned long inlen, 28 int der_encode_sequence_ex(ltc_asn1_list *list, unsigned long inlen,
32 unsigned char *out, unsigned long *outlen, int type_of) 29 unsigned char *out, unsigned long *outlen, int type_of)
33 { 30 {
34 int err, type; 31 int err;
32 ltc_asn1_type type;
35 unsigned long size, x, y, z, i; 33 unsigned long size, x, y, z, i;
36 void *data; 34 void *data;
37 35
38 LTC_ARGCHK(list != NULL); 36 LTC_ARGCHK(list != NULL);
39 LTC_ARGCHK(out != NULL); 37 LTC_ARGCHK(out != NULL);
40 LTC_ARGCHK(outlen != NULL); 38 LTC_ARGCHK(outlen != NULL);
41 39
42 /* get size of output that will be required */ 40 /* get size of output that will be required */
43 y = 0; 41 y = 0; z = 0;
44 for (i = 0; i < inlen; i++) { 42 if ((err = der_length_sequence_ex(list, inlen, &y, &z)) != CRYPT_OK) return CRYPT_INVALID_ARG;
45 type = list[i].type;
46 size = list[i].size;
47 data = list[i].data;
48
49 if (type == LTC_ASN1_EOL) {
50 break;
51 }
52
53 switch (type) {
54 case LTC_ASN1_BOOLEAN:
55 if ((err = der_length_boolean(&x)) != CRYPT_OK) {
56 goto LBL_ERR;
57 }
58 y += x;
59 break;
60
61 case LTC_ASN1_INTEGER:
62 if ((err = der_length_integer(data, &x)) != CRYPT_OK) {
63 goto LBL_ERR;
64 }
65 y += x;
66 break;
67
68 case LTC_ASN1_SHORT_INTEGER:
69 if ((err = der_length_short_integer(*((unsigned long*)data), &x)) != CRYPT_OK) {
70 goto LBL_ERR;
71 }
72 y += x;
73 break;
74
75 case LTC_ASN1_BIT_STRING:
76 if ((err = der_length_bit_string(size, &x)) != CRYPT_OK) {
77 goto LBL_ERR;
78 }
79 y += x;
80 break;
81
82 case LTC_ASN1_OCTET_STRING:
83 if ((err = der_length_octet_string(size, &x)) != CRYPT_OK) {
84 goto LBL_ERR;
85 }
86 y += x;
87 break;
88
89 case LTC_ASN1_NULL:
90 y += 2;
91 break;
92
93 case LTC_ASN1_OBJECT_IDENTIFIER:
94 if ((err = der_length_object_identifier(data, size, &x)) != CRYPT_OK) {
95 goto LBL_ERR;
96 }
97 y += x;
98 break;
99
100 case LTC_ASN1_IA5_STRING:
101 if ((err = der_length_ia5_string(data, size, &x)) != CRYPT_OK) {
102 goto LBL_ERR;
103 }
104 y += x;
105 break;
106
107 case LTC_ASN1_PRINTABLE_STRING:
108 if ((err = der_length_printable_string(data, size, &x)) != CRYPT_OK) {
109 goto LBL_ERR;
110 }
111 y += x;
112 break;
113
114 case LTC_ASN1_UTF8_STRING:
115 if ((err = der_length_utf8_string(data, size, &x)) != CRYPT_OK) {
116 goto LBL_ERR;
117 }
118 y += x;
119 break;
120
121 case LTC_ASN1_UTCTIME:
122 if ((err = der_length_utctime(data, &x)) != CRYPT_OK) {
123 goto LBL_ERR;
124 }
125 y += x;
126 break;
127
128 case LTC_ASN1_SET:
129 case LTC_ASN1_SETOF:
130 case LTC_ASN1_SEQUENCE:
131 if ((err = der_length_sequence(data, size, &x)) != CRYPT_OK) {
132 goto LBL_ERR;
133 }
134 y += x;
135 break;
136
137 default:
138 err = CRYPT_INVALID_ARG;
139 goto LBL_ERR;
140 }
141 }
142
143 /* calc header size */
144 z = y;
145 if (y < 128) {
146 y += 2;
147 } else if (y < 256) {
148 /* 0x30 0x81 LL */
149 y += 3;
150 } else if (y < 65536UL) {
151 /* 0x30 0x82 LL LL */
152 y += 4;
153 } else if (y < 16777216UL) {
154 /* 0x30 0x83 LL LL LL */
155 y += 5;
156 } else {
157 err = CRYPT_INVALID_ARG;
158 goto LBL_ERR;
159 }
160 43
161 /* too big ? */ 44 /* too big ? */
162 if (*outlen < y) { 45 if (*outlen < y) {
163 *outlen = y; 46 *outlen = y;
164 err = CRYPT_BUFFER_OVERFLOW; 47 err = CRYPT_BUFFER_OVERFLOW;
166 } 49 }
167 50
168 /* store header */ 51 /* store header */
169 x = 0; 52 x = 0;
170 out[x++] = (type_of == LTC_ASN1_SEQUENCE) ? 0x30 : 0x31; 53 out[x++] = (type_of == LTC_ASN1_SEQUENCE) ? 0x30 : 0x31;
171 54
172 if (z < 128) { 55 if (z < 128) {
173 out[x++] = (unsigned char)z; 56 out[x++] = (unsigned char)z;
174 } else if (z < 256) { 57 } else if (z < 256) {
175 out[x++] = 0x81; 58 out[x++] = 0x81;
176 out[x++] = (unsigned char)z; 59 out[x++] = (unsigned char)z;
190 for (i = 0; i < inlen; i++) { 73 for (i = 0; i < inlen; i++) {
191 type = list[i].type; 74 type = list[i].type;
192 size = list[i].size; 75 size = list[i].size;
193 data = list[i].data; 76 data = list[i].data;
194 77
195 if (type == LTC_ASN1_EOL) { 78 if (type == LTC_ASN1_EOL) {
196 break; 79 break;
197 } 80 }
198 81
199 switch (type) { 82 switch (type) {
200 case LTC_ASN1_BOOLEAN: 83 case LTC_ASN1_BOOLEAN:
201 z = *outlen; 84 z = *outlen;
202 if ((err = der_encode_boolean(*((int *)data), out + x, &z)) != CRYPT_OK) { 85 if ((err = der_encode_boolean(*((int *)data), out + x, &z)) != CRYPT_OK) {
203 goto LBL_ERR; 86 goto LBL_ERR;
204 } 87 }
205 x += z; 88 break;
206 *outlen -= z; 89
207 break;
208
209 case LTC_ASN1_INTEGER: 90 case LTC_ASN1_INTEGER:
210 z = *outlen; 91 z = *outlen;
211 if ((err = der_encode_integer(data, out + x, &z)) != CRYPT_OK) { 92 if ((err = der_encode_integer(data, out + x, &z)) != CRYPT_OK) {
212 goto LBL_ERR; 93 goto LBL_ERR;
213 } 94 }
214 x += z;
215 *outlen -= z;
216 break; 95 break;
217 96
218 case LTC_ASN1_SHORT_INTEGER: 97 case LTC_ASN1_SHORT_INTEGER:
219 z = *outlen; 98 z = *outlen;
220 if ((err = der_encode_short_integer(*((unsigned long*)data), out + x, &z)) != CRYPT_OK) { 99 if ((err = der_encode_short_integer(*((unsigned long*)data), out + x, &z)) != CRYPT_OK) {
221 goto LBL_ERR; 100 goto LBL_ERR;
222 } 101 }
223 x += z;
224 *outlen -= z;
225 break; 102 break;
226 103
227 case LTC_ASN1_BIT_STRING: 104 case LTC_ASN1_BIT_STRING:
228 z = *outlen; 105 z = *outlen;
229 if ((err = der_encode_bit_string(data, size, out + x, &z)) != CRYPT_OK) { 106 if ((err = der_encode_bit_string(data, size, out + x, &z)) != CRYPT_OK) {
230 goto LBL_ERR; 107 goto LBL_ERR;
231 } 108 }
232 x += z; 109 break;
233 *outlen -= z; 110
111 case LTC_ASN1_RAW_BIT_STRING:
112 z = *outlen;
113 if ((err = der_encode_raw_bit_string(data, size, out + x, &z)) != CRYPT_OK) {
114 goto LBL_ERR;
115 }
234 break; 116 break;
235 117
236 case LTC_ASN1_OCTET_STRING: 118 case LTC_ASN1_OCTET_STRING:
237 z = *outlen; 119 z = *outlen;
238 if ((err = der_encode_octet_string(data, size, out + x, &z)) != CRYPT_OK) { 120 if ((err = der_encode_octet_string(data, size, out + x, &z)) != CRYPT_OK) {
239 goto LBL_ERR; 121 goto LBL_ERR;
240 } 122 }
241 x += z;
242 *outlen -= z;
243 break; 123 break;
244 124
245 case LTC_ASN1_NULL: 125 case LTC_ASN1_NULL:
246 out[x++] = 0x05; 126 out[x] = 0x05;
247 out[x++] = 0x00; 127 out[x+1] = 0x00;
248 *outlen -= 2; 128 z = 2;
249 break; 129 break;
250 130
251 case LTC_ASN1_OBJECT_IDENTIFIER: 131 case LTC_ASN1_OBJECT_IDENTIFIER:
252 z = *outlen; 132 z = *outlen;
253 if ((err = der_encode_object_identifier(data, size, out + x, &z)) != CRYPT_OK) { 133 if ((err = der_encode_object_identifier(data, size, out + x, &z)) != CRYPT_OK) {
254 goto LBL_ERR; 134 goto LBL_ERR;
255 } 135 }
256 x += z;
257 *outlen -= z;
258 break; 136 break;
259 137
260 case LTC_ASN1_IA5_STRING: 138 case LTC_ASN1_IA5_STRING:
261 z = *outlen; 139 z = *outlen;
262 if ((err = der_encode_ia5_string(data, size, out + x, &z)) != CRYPT_OK) { 140 if ((err = der_encode_ia5_string(data, size, out + x, &z)) != CRYPT_OK) {
263 goto LBL_ERR; 141 goto LBL_ERR;
264 } 142 }
265 x += z; 143 break;
266 *outlen -= z; 144
267 break;
268
269 case LTC_ASN1_PRINTABLE_STRING: 145 case LTC_ASN1_PRINTABLE_STRING:
270 z = *outlen; 146 z = *outlen;
271 if ((err = der_encode_printable_string(data, size, out + x, &z)) != CRYPT_OK) { 147 if ((err = der_encode_printable_string(data, size, out + x, &z)) != CRYPT_OK) {
272 goto LBL_ERR; 148 goto LBL_ERR;
273 } 149 }
274 x += z;
275 *outlen -= z;
276 break; 150 break;
277 151
278 case LTC_ASN1_UTF8_STRING: 152 case LTC_ASN1_UTF8_STRING:
279 z = *outlen; 153 z = *outlen;
280 if ((err = der_encode_utf8_string(data, size, out + x, &z)) != CRYPT_OK) { 154 if ((err = der_encode_utf8_string(data, size, out + x, &z)) != CRYPT_OK) {
281 goto LBL_ERR; 155 goto LBL_ERR;
282 } 156 }
283 x += z;
284 *outlen -= z;
285 break; 157 break;
286 158
287 case LTC_ASN1_UTCTIME: 159 case LTC_ASN1_UTCTIME:
288 z = *outlen; 160 z = *outlen;
289 if ((err = der_encode_utctime(data, out + x, &z)) != CRYPT_OK) { 161 if ((err = der_encode_utctime(data, out + x, &z)) != CRYPT_OK) {
290 goto LBL_ERR; 162 goto LBL_ERR;
291 } 163 }
292 x += z; 164 break;
293 *outlen -= z; 165
166 case LTC_ASN1_GENERALIZEDTIME:
167 z = *outlen;
168 if ((err = der_encode_generalizedtime(data, out + x, &z)) != CRYPT_OK) {
169 goto LBL_ERR;
170 }
294 break; 171 break;
295 172
296 case LTC_ASN1_SET: 173 case LTC_ASN1_SET:
297 z = *outlen; 174 z = *outlen;
298 if ((err = der_encode_set(data, size, out + x, &z)) != CRYPT_OK) { 175 if ((err = der_encode_set(data, size, out + x, &z)) != CRYPT_OK) {
299 goto LBL_ERR; 176 goto LBL_ERR;
300 } 177 }
301 x += z;
302 *outlen -= z;
303 break; 178 break;
304 179
305 case LTC_ASN1_SETOF: 180 case LTC_ASN1_SETOF:
306 z = *outlen; 181 z = *outlen;
307 if ((err = der_encode_setof(data, size, out + x, &z)) != CRYPT_OK) { 182 if ((err = der_encode_setof(data, size, out + x, &z)) != CRYPT_OK) {
308 goto LBL_ERR; 183 goto LBL_ERR;
309 } 184 }
310 x += z;
311 *outlen -= z;
312 break; 185 break;
313 186
314 case LTC_ASN1_SEQUENCE: 187 case LTC_ASN1_SEQUENCE:
315 z = *outlen; 188 z = *outlen;
316 if ((err = der_encode_sequence_ex(data, size, out + x, &z, type)) != CRYPT_OK) { 189 if ((err = der_encode_sequence_ex(data, size, out + x, &z, type)) != CRYPT_OK) {
317 goto LBL_ERR; 190 goto LBL_ERR;
318 } 191 }
319 x += z; 192 break;
320 *outlen -= z; 193
321 break; 194 case LTC_ASN1_CHOICE:
322 195 case LTC_ASN1_CONSTRUCTED:
323 default: 196 case LTC_ASN1_CONTEXT_SPECIFIC:
197 case LTC_ASN1_EOL:
198 case LTC_ASN1_TELETEX_STRING:
324 err = CRYPT_INVALID_ARG; 199 err = CRYPT_INVALID_ARG;
325 goto LBL_ERR; 200 goto LBL_ERR;
326 } 201 }
202
203 x += z;
204 *outlen -= z;
327 } 205 }
328 *outlen = x; 206 *outlen = x;
329 err = CRYPT_OK; 207 err = CRYPT_OK;
330 208
331 LBL_ERR: 209 LBL_ERR:
332 return err; 210 return err;
333 } 211 }
334 212
335 #endif 213 #endif
214
215 /* ref: $Format:%D$ */
216 /* git commit: $Format:%H$ */
217 /* commit time: $Format:%ai$ */