]>
Commit | Line | Data |
---|---|---|
8931b30d | 1 | /* bio_ndef.c */ |
0f113f3e MC |
2 | /* |
3 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | |
8931b30d DSH |
4 | * project. |
5 | */ | |
6 | /* ==================================================================== | |
7 | * Copyright (c) 2008 The OpenSSL Project. All rights reserved. | |
8 | * | |
9 | * Redistribution and use in source and binary forms, with or without | |
10 | * modification, are permitted provided that the following conditions | |
11 | * are met: | |
12 | * | |
13 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 14 | * notice, this list of conditions and the following disclaimer. |
8931b30d DSH |
15 | * |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in | |
18 | * the documentation and/or other materials provided with the | |
19 | * distribution. | |
20 | * | |
21 | * 3. All advertising materials mentioning features or use of this | |
22 | * software must display the following acknowledgment: | |
23 | * "This product includes software developed by the OpenSSL Project | |
24 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
25 | * | |
26 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
27 | * endorse or promote products derived from this software without | |
28 | * prior written permission. For written permission, please contact | |
29 | * licensing@OpenSSL.org. | |
30 | * | |
31 | * 5. Products derived from this software may not be called "OpenSSL" | |
32 | * nor may "OpenSSL" appear in their names without prior written | |
33 | * permission of the OpenSSL Project. | |
34 | * | |
35 | * 6. Redistributions of any form whatsoever must retain the following | |
36 | * acknowledgment: | |
37 | * "This product includes software developed by the OpenSSL Project | |
38 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
39 | * | |
40 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
41 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
43 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
44 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
45 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
46 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
47 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
49 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
50 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
51 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
52 | * ==================================================================== | |
53 | * | |
54 | */ | |
55 | ||
56 | #include <openssl/asn1.h> | |
57 | #include <openssl/asn1t.h> | |
58 | #include <openssl/bio.h> | |
59 | #include <openssl/err.h> | |
60 | ||
8931b30d DSH |
61 | #include <stdio.h> |
62 | ||
63 | /* Experimental NDEF ASN1 BIO support routines */ | |
64 | ||
0f113f3e MC |
65 | /* |
66 | * The usage is quite simple, initialize an ASN1 structure, get a BIO from it | |
67 | * then any data written through the BIO will end up translated to | |
68 | * approptiate format on the fly. The data is streamed out and does *not* | |
69 | * need to be all held in memory at once. When the BIO is flushed the output | |
70 | * is finalized and any signatures etc written out. The BIO is a 'proper' | |
71 | * BIO and can handle non blocking I/O correctly. The usage is simple. The | |
72 | * implementation is *not*... | |
8931b30d DSH |
73 | */ |
74 | ||
75 | /* BIO support data stored in the ASN1 BIO ex_arg */ | |
76 | ||
0f113f3e MC |
77 | typedef struct ndef_aux_st { |
78 | /* ASN1 structure this BIO refers to */ | |
79 | ASN1_VALUE *val; | |
80 | const ASN1_ITEM *it; | |
81 | /* Top of the BIO chain */ | |
82 | BIO *ndef_bio; | |
83 | /* Output BIO */ | |
84 | BIO *out; | |
85 | /* Boundary where content is inserted */ | |
86 | unsigned char **boundary; | |
87 | /* DER buffer start */ | |
88 | unsigned char *derbuf; | |
89 | } NDEF_SUPPORT; | |
8931b30d DSH |
90 | |
91 | static int ndef_prefix(BIO *b, unsigned char **pbuf, int *plen, void *parg); | |
0f113f3e MC |
92 | static int ndef_prefix_free(BIO *b, unsigned char **pbuf, int *plen, |
93 | void *parg); | |
8931b30d | 94 | static int ndef_suffix(BIO *b, unsigned char **pbuf, int *plen, void *parg); |
0f113f3e MC |
95 | static int ndef_suffix_free(BIO *b, unsigned char **pbuf, int *plen, |
96 | void *parg); | |
8931b30d DSH |
97 | |
98 | BIO *BIO_new_NDEF(BIO *out, ASN1_VALUE *val, const ASN1_ITEM *it) | |
0f113f3e MC |
99 | { |
100 | NDEF_SUPPORT *ndef_aux = NULL; | |
101 | BIO *asn_bio = NULL; | |
102 | const ASN1_AUX *aux = it->funcs; | |
103 | ASN1_STREAM_ARG sarg; | |
8931b30d | 104 | |
0f113f3e MC |
105 | if (!aux || !aux->asn1_cb) { |
106 | ASN1err(ASN1_F_BIO_NEW_NDEF, ASN1_R_STREAMING_NOT_SUPPORTED); | |
107 | return NULL; | |
108 | } | |
109 | ndef_aux = OPENSSL_malloc(sizeof(NDEF_SUPPORT)); | |
110 | asn_bio = BIO_new(BIO_f_asn1()); | |
8931b30d | 111 | |
0f113f3e | 112 | /* ASN1 bio needs to be next to output BIO */ |
8931b30d | 113 | |
0f113f3e | 114 | out = BIO_push(asn_bio, out); |
8931b30d | 115 | |
0f113f3e MC |
116 | if (!ndef_aux || !asn_bio || !out) |
117 | goto err; | |
8931b30d | 118 | |
0f113f3e MC |
119 | BIO_asn1_set_prefix(asn_bio, ndef_prefix, ndef_prefix_free); |
120 | BIO_asn1_set_suffix(asn_bio, ndef_suffix, ndef_suffix_free); | |
8931b30d | 121 | |
0f113f3e MC |
122 | /* |
123 | * Now let callback prepend any digest, cipher etc BIOs ASN1 structure | |
124 | * needs. | |
125 | */ | |
8931b30d | 126 | |
0f113f3e MC |
127 | sarg.out = out; |
128 | sarg.ndef_bio = NULL; | |
129 | sarg.boundary = NULL; | |
8931b30d | 130 | |
0f113f3e MC |
131 | if (aux->asn1_cb(ASN1_OP_STREAM_PRE, &val, it, &sarg) <= 0) |
132 | goto err; | |
8931b30d | 133 | |
0f113f3e MC |
134 | ndef_aux->val = val; |
135 | ndef_aux->it = it; | |
136 | ndef_aux->ndef_bio = sarg.ndef_bio; | |
137 | ndef_aux->boundary = sarg.boundary; | |
138 | ndef_aux->out = out; | |
8931b30d | 139 | |
0f113f3e | 140 | BIO_ctrl(asn_bio, BIO_C_SET_EX_ARG, 0, ndef_aux); |
8931b30d | 141 | |
0f113f3e | 142 | return sarg.ndef_bio; |
8931b30d | 143 | |
0f113f3e MC |
144 | err: |
145 | if (asn_bio) | |
146 | BIO_free(asn_bio); | |
147 | if (ndef_aux) | |
148 | OPENSSL_free(ndef_aux); | |
149 | return NULL; | |
150 | } | |
8931b30d DSH |
151 | |
152 | static int ndef_prefix(BIO *b, unsigned char **pbuf, int *plen, void *parg) | |
0f113f3e MC |
153 | { |
154 | NDEF_SUPPORT *ndef_aux; | |
155 | unsigned char *p; | |
156 | int derlen; | |
8931b30d | 157 | |
0f113f3e MC |
158 | if (!parg) |
159 | return 0; | |
8931b30d | 160 | |
0f113f3e | 161 | ndef_aux = *(NDEF_SUPPORT **)parg; |
8931b30d | 162 | |
0f113f3e MC |
163 | derlen = ASN1_item_ndef_i2d(ndef_aux->val, NULL, ndef_aux->it); |
164 | p = OPENSSL_malloc(derlen); | |
918bb865 MC |
165 | if(!p) |
166 | return 0; | |
167 | ||
0f113f3e MC |
168 | ndef_aux->derbuf = p; |
169 | *pbuf = p; | |
170 | derlen = ASN1_item_ndef_i2d(ndef_aux->val, &p, ndef_aux->it); | |
8931b30d | 171 | |
0f113f3e MC |
172 | if (!*ndef_aux->boundary) |
173 | return 0; | |
8931b30d | 174 | |
0f113f3e | 175 | *plen = *ndef_aux->boundary - *pbuf; |
8931b30d | 176 | |
0f113f3e MC |
177 | return 1; |
178 | } | |
8931b30d | 179 | |
0f113f3e MC |
180 | static int ndef_prefix_free(BIO *b, unsigned char **pbuf, int *plen, |
181 | void *parg) | |
182 | { | |
183 | NDEF_SUPPORT *ndef_aux; | |
8931b30d | 184 | |
0f113f3e MC |
185 | if (!parg) |
186 | return 0; | |
8931b30d | 187 | |
0f113f3e | 188 | ndef_aux = *(NDEF_SUPPORT **)parg; |
8931b30d | 189 | |
0f113f3e MC |
190 | if (ndef_aux->derbuf) |
191 | OPENSSL_free(ndef_aux->derbuf); | |
8931b30d | 192 | |
0f113f3e MC |
193 | ndef_aux->derbuf = NULL; |
194 | *pbuf = NULL; | |
195 | *plen = 0; | |
196 | return 1; | |
197 | } | |
8931b30d | 198 | |
0f113f3e MC |
199 | static int ndef_suffix_free(BIO *b, unsigned char **pbuf, int *plen, |
200 | void *parg) | |
201 | { | |
202 | NDEF_SUPPORT **pndef_aux = (NDEF_SUPPORT **)parg; | |
203 | if (!ndef_prefix_free(b, pbuf, plen, parg)) | |
204 | return 0; | |
205 | OPENSSL_free(*pndef_aux); | |
206 | *pndef_aux = NULL; | |
207 | return 1; | |
208 | } | |
8931b30d DSH |
209 | |
210 | static int ndef_suffix(BIO *b, unsigned char **pbuf, int *plen, void *parg) | |
0f113f3e MC |
211 | { |
212 | NDEF_SUPPORT *ndef_aux; | |
213 | unsigned char *p; | |
214 | int derlen; | |
215 | const ASN1_AUX *aux; | |
216 | ASN1_STREAM_ARG sarg; | |
217 | ||
218 | if (!parg) | |
219 | return 0; | |
220 | ||
221 | ndef_aux = *(NDEF_SUPPORT **)parg; | |
222 | ||
223 | aux = ndef_aux->it->funcs; | |
224 | ||
225 | /* Finalize structures */ | |
226 | sarg.ndef_bio = ndef_aux->ndef_bio; | |
227 | sarg.out = ndef_aux->out; | |
228 | sarg.boundary = ndef_aux->boundary; | |
229 | if (aux->asn1_cb(ASN1_OP_STREAM_POST, | |
230 | &ndef_aux->val, ndef_aux->it, &sarg) <= 0) | |
231 | return 0; | |
232 | ||
233 | derlen = ASN1_item_ndef_i2d(ndef_aux->val, NULL, ndef_aux->it); | |
234 | p = OPENSSL_malloc(derlen); | |
918bb865 MC |
235 | if(!p) |
236 | return 0; | |
237 | ||
0f113f3e MC |
238 | ndef_aux->derbuf = p; |
239 | *pbuf = p; | |
240 | derlen = ASN1_item_ndef_i2d(ndef_aux->val, &p, ndef_aux->it); | |
241 | ||
242 | if (!*ndef_aux->boundary) | |
243 | return 0; | |
244 | *pbuf = *ndef_aux->boundary; | |
245 | *plen = derlen - (*ndef_aux->boundary - ndef_aux->derbuf); | |
246 | ||
247 | return 1; | |
248 | } |