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ece9304c | 1 | /* |
fecb3aae | 2 | * Copyright 2020-2022 The OpenSSL Project Authors. All Rights Reserved. |
ece9304c RL |
3 | * |
4 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
10 | #include <openssl/core_names.h> | |
11 | #include <openssl/bio.h> | |
12 | #include <openssl/params.h> | |
13 | #include <openssl/provider.h> | |
66066e1b DDO |
14 | #include <openssl/evperr.h> |
15 | #include <openssl/ecerr.h> | |
39a61e69 | 16 | #include <openssl/pkcs12err.h> |
66066e1b | 17 | #include <openssl/x509err.h> |
de5008a4 | 18 | #include <openssl/trace.h> |
141cc94e | 19 | #include "internal/bio.h" |
9379bf94 | 20 | #include "internal/provider.h" |
24755445 | 21 | #include "internal/namemap.h" |
63f187cf | 22 | #include "crypto/decoder.h" |
ece9304c | 23 | #include "encoder_local.h" |
d5f9166b | 24 | #include "internal/e_os.h" |
ece9304c RL |
25 | |
26 | struct decoder_process_data_st { | |
27 | OSSL_DECODER_CTX *ctx; | |
28 | ||
29 | /* Current BIO */ | |
30 | BIO *bio; | |
31 | ||
32 | /* Index of the current decoder instance to be processed */ | |
bd7a6f16 | 33 | size_t current_decoder_inst_index; |
57acc56b RL |
34 | /* For tracing, count recursion level */ |
35 | size_t recursion; | |
f9965953 RL |
36 | |
37 | /*- | |
38 | * Flags | |
39 | */ | |
40 | unsigned int flag_next_level_called : 1; | |
41 | unsigned int flag_construct_called : 1; | |
73dd5d67 | 42 | unsigned int flag_input_structure_checked : 1; |
ece9304c RL |
43 | }; |
44 | ||
45 | static int decoder_process(const OSSL_PARAM params[], void *arg); | |
46 | ||
47 | int OSSL_DECODER_from_bio(OSSL_DECODER_CTX *ctx, BIO *in) | |
48 | { | |
49 | struct decoder_process_data_st data; | |
50 | int ok = 0; | |
7a45d51c | 51 | BIO *new_bio = NULL; |
ab7554e5 | 52 | unsigned long lasterr; |
ece9304c | 53 | |
42e97dde SL |
54 | if (in == NULL) { |
55 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_PASSED_NULL_PARAMETER); | |
56 | return 0; | |
57 | } | |
58 | ||
40692ed7 MC |
59 | if (OSSL_DECODER_CTX_get_num_decoders(ctx) == 0) { |
60 | ERR_raise_data(ERR_LIB_OSSL_DECODER, OSSL_DECODER_R_DECODER_NOT_FOUND, | |
61 | "No decoders were found. For standard decoders you need " | |
62 | "at least one of the default or base providers " | |
63 | "available. Did you forget to load them?"); | |
64 | return 0; | |
65 | } | |
66 | ||
ab7554e5 TM |
67 | lasterr = ERR_peek_last_error(); |
68 | ||
7a45d51c SL |
69 | if (BIO_tell(in) < 0) { |
70 | new_bio = BIO_new(BIO_f_readbuffer()); | |
71 | if (new_bio == NULL) | |
72 | return 0; | |
73 | in = BIO_push(new_bio, in); | |
74 | } | |
ece9304c RL |
75 | memset(&data, 0, sizeof(data)); |
76 | data.ctx = ctx; | |
77 | data.bio = in; | |
78 | ||
a517edec RL |
79 | /* Enable passphrase caching */ |
80 | (void)ossl_pw_enable_passphrase_caching(&ctx->pwdata); | |
81 | ||
ece9304c RL |
82 | ok = decoder_process(NULL, &data); |
83 | ||
f9965953 RL |
84 | if (!data.flag_construct_called) { |
85 | const char *spaces | |
86 | = ctx->start_input_type != NULL && ctx->input_structure != NULL | |
87 | ? " " : ""; | |
88 | const char *input_type_label | |
89 | = ctx->start_input_type != NULL ? "Input type: " : ""; | |
90 | const char *input_structure_label | |
91 | = ctx->input_structure != NULL ? "Input structure: " : ""; | |
92 | const char *comma | |
93 | = ctx->start_input_type != NULL && ctx->input_structure != NULL | |
94 | ? ", " : ""; | |
95 | const char *input_type | |
96 | = ctx->start_input_type != NULL ? ctx->start_input_type : ""; | |
97 | const char *input_structure | |
98 | = ctx->input_structure != NULL ? ctx->input_structure : ""; | |
99 | ||
ab7554e5 TM |
100 | if (ERR_peek_last_error() == lasterr || ERR_peek_error() == 0) |
101 | /* Prevent spurious decoding error but add at least something */ | |
d9efb24d | 102 | ERR_raise_data(ERR_LIB_OSSL_DECODER, ERR_R_UNSUPPORTED, |
4d2d4b4b | 103 | "No supported data to decode. %s%s%s%s%s%s", |
d9efb24d DDO |
104 | spaces, input_type_label, input_type, comma, |
105 | input_structure_label, input_structure); | |
f9965953 RL |
106 | ok = 0; |
107 | } | |
108 | ||
ece9304c | 109 | /* Clear any internally cached passphrase */ |
a517edec RL |
110 | (void)ossl_pw_clear_passphrase_cache(&ctx->pwdata); |
111 | ||
7a45d51c SL |
112 | if (new_bio != NULL) { |
113 | BIO_pop(new_bio); | |
114 | BIO_free(new_bio); | |
115 | } | |
ece9304c RL |
116 | return ok; |
117 | } | |
118 | ||
119 | #ifndef OPENSSL_NO_STDIO | |
120 | static BIO *bio_from_file(FILE *fp) | |
121 | { | |
122 | BIO *b; | |
123 | ||
124 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
125 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_BIO_LIB); | |
126 | return NULL; | |
127 | } | |
128 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
129 | return b; | |
130 | } | |
131 | ||
132 | int OSSL_DECODER_from_fp(OSSL_DECODER_CTX *ctx, FILE *fp) | |
133 | { | |
134 | BIO *b = bio_from_file(fp); | |
135 | int ret = 0; | |
136 | ||
137 | if (b != NULL) | |
138 | ret = OSSL_DECODER_from_bio(ctx, b); | |
139 | ||
140 | BIO_free(b); | |
141 | return ret; | |
142 | } | |
143 | #endif | |
144 | ||
25cf949f RL |
145 | int OSSL_DECODER_from_data(OSSL_DECODER_CTX *ctx, const unsigned char **pdata, |
146 | size_t *pdata_len) | |
147 | { | |
148 | BIO *membio; | |
149 | int ret = 0; | |
150 | ||
151 | if (pdata == NULL || *pdata == NULL || pdata_len == NULL) { | |
152 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_PASSED_NULL_PARAMETER); | |
153 | return 0; | |
154 | } | |
155 | ||
156 | membio = BIO_new_mem_buf(*pdata, (int)*pdata_len); | |
157 | if (OSSL_DECODER_from_bio(ctx, membio)) { | |
158 | *pdata_len = (size_t)BIO_get_mem_data(membio, pdata); | |
159 | ret = 1; | |
160 | } | |
161 | BIO_free(membio); | |
162 | ||
163 | return ret; | |
164 | } | |
165 | ||
ebfdb63d RL |
166 | int OSSL_DECODER_CTX_set_selection(OSSL_DECODER_CTX *ctx, int selection) |
167 | { | |
168 | if (!ossl_assert(ctx != NULL)) { | |
169 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_PASSED_NULL_PARAMETER); | |
170 | return 0; | |
171 | } | |
172 | ||
173 | /* | |
174 | * 0 is a valid selection, and means that the caller leaves | |
175 | * it to code to discover what the selection is. | |
176 | */ | |
177 | ctx->selection = selection; | |
178 | return 1; | |
179 | } | |
180 | ||
ece9304c RL |
181 | int OSSL_DECODER_CTX_set_input_type(OSSL_DECODER_CTX *ctx, |
182 | const char *input_type) | |
183 | { | |
184 | if (!ossl_assert(ctx != NULL)) { | |
185 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_PASSED_NULL_PARAMETER); | |
186 | return 0; | |
187 | } | |
188 | ||
189 | /* | |
190 | * NULL is a valid starting input type, and means that the caller leaves | |
191 | * it to code to discover what the starting input type is. | |
192 | */ | |
193 | ctx->start_input_type = input_type; | |
194 | return 1; | |
195 | } | |
196 | ||
ebfdb63d RL |
197 | int OSSL_DECODER_CTX_set_input_structure(OSSL_DECODER_CTX *ctx, |
198 | const char *input_structure) | |
199 | { | |
200 | if (!ossl_assert(ctx != NULL)) { | |
201 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_PASSED_NULL_PARAMETER); | |
202 | return 0; | |
203 | } | |
204 | ||
205 | /* | |
4489655c DB |
206 | * NULL is a valid starting input structure, and means that the caller |
207 | * leaves it to code to discover what the starting input structure is. | |
ebfdb63d RL |
208 | */ |
209 | ctx->input_structure = input_structure; | |
210 | return 1; | |
211 | } | |
212 | ||
63f187cf RL |
213 | OSSL_DECODER_INSTANCE *ossl_decoder_instance_new(OSSL_DECODER *decoder, |
214 | void *decoderctx) | |
ece9304c RL |
215 | { |
216 | OSSL_DECODER_INSTANCE *decoder_inst = NULL; | |
9379bf94 RL |
217 | const OSSL_PROVIDER *prov; |
218 | OSSL_LIB_CTX *libctx; | |
219 | const OSSL_PROPERTY_LIST *props; | |
220 | const OSSL_PROPERTY_DEFINITION *prop; | |
ece9304c | 221 | |
63f187cf | 222 | if (!ossl_assert(decoder != NULL)) { |
ece9304c RL |
223 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_PASSED_NULL_PARAMETER); |
224 | return 0; | |
225 | } | |
226 | ||
ece9304c RL |
227 | if ((decoder_inst = OPENSSL_zalloc(sizeof(*decoder_inst))) == NULL) { |
228 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_MALLOC_FAILURE); | |
229 | return 0; | |
230 | } | |
ece9304c | 231 | |
9379bf94 RL |
232 | prov = OSSL_DECODER_get0_provider(decoder); |
233 | libctx = ossl_provider_libctx(prov); | |
234 | props = ossl_decoder_parsed_properties(decoder); | |
235 | if (props == NULL) { | |
236 | ERR_raise_data(ERR_LIB_OSSL_DECODER, ERR_R_INVALID_PROPERTY_DEFINITION, | |
237 | "there are no property definitions with decoder %s", | |
238 | OSSL_DECODER_get0_name(decoder)); | |
ece9304c | 239 | goto err; |
9379bf94 RL |
240 | } |
241 | ||
242 | /* The "input" property is mandatory */ | |
243 | prop = ossl_property_find_property(props, libctx, "input"); | |
244 | decoder_inst->input_type = ossl_property_get_string_value(libctx, prop); | |
24755445 | 245 | decoder_inst->input_type_id = 0; |
9379bf94 RL |
246 | if (decoder_inst->input_type == NULL) { |
247 | ERR_raise_data(ERR_LIB_OSSL_DECODER, ERR_R_INVALID_PROPERTY_DEFINITION, | |
248 | "the mandatory 'input' property is missing " | |
249 | "for decoder %s (properties: %s)", | |
250 | OSSL_DECODER_get0_name(decoder), | |
251 | OSSL_DECODER_get0_properties(decoder)); | |
252 | goto err; | |
253 | } | |
254 | ||
255 | /* The "structure" property is optional */ | |
256 | prop = ossl_property_find_property(props, libctx, "structure"); | |
257 | if (prop != NULL) { | |
258 | decoder_inst->input_structure | |
259 | = ossl_property_get_string_value(libctx, prop); | |
260 | } | |
ece9304c | 261 | |
9ec9b968 MC |
262 | if (!OSSL_DECODER_up_ref(decoder)) { |
263 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_INTERNAL_ERROR); | |
264 | goto err; | |
265 | } | |
63f187cf RL |
266 | decoder_inst->decoder = decoder; |
267 | decoder_inst->decoderctx = decoderctx; | |
268 | return decoder_inst; | |
ece9304c | 269 | err: |
63f187cf RL |
270 | ossl_decoder_instance_free(decoder_inst); |
271 | return NULL; | |
272 | } | |
273 | ||
274 | void ossl_decoder_instance_free(OSSL_DECODER_INSTANCE *decoder_inst) | |
275 | { | |
ece9304c RL |
276 | if (decoder_inst != NULL) { |
277 | if (decoder_inst->decoder != NULL) | |
bd7a6f16 | 278 | decoder_inst->decoder->freectx(decoder_inst->decoderctx); |
63f187cf | 279 | decoder_inst->decoderctx = NULL; |
ece9304c | 280 | OSSL_DECODER_free(decoder_inst->decoder); |
63f187cf | 281 | decoder_inst->decoder = NULL; |
ece9304c RL |
282 | OPENSSL_free(decoder_inst); |
283 | } | |
63f187cf RL |
284 | } |
285 | ||
286 | int ossl_decoder_ctx_add_decoder_inst(OSSL_DECODER_CTX *ctx, | |
ebfdb63d | 287 | OSSL_DECODER_INSTANCE *di) |
63f187cf | 288 | { |
de5008a4 RL |
289 | int ok; |
290 | ||
63f187cf RL |
291 | if (ctx->decoder_insts == NULL |
292 | && (ctx->decoder_insts = | |
293 | sk_OSSL_DECODER_INSTANCE_new_null()) == NULL) { | |
294 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_MALLOC_FAILURE); | |
295 | return 0; | |
296 | } | |
297 | ||
de5008a4 RL |
298 | ok = (sk_OSSL_DECODER_INSTANCE_push(ctx->decoder_insts, di) > 0); |
299 | if (ok) { | |
300 | OSSL_TRACE_BEGIN(DECODER) { | |
301 | BIO_printf(trc_out, | |
ef2194c4 RL |
302 | "(ctx %p) Added decoder instance %p for decoder %p\n" |
303 | " %s with %s\n", | |
304 | (void *)ctx, (void *)di, (void *)di->decoder, | |
305 | OSSL_DECODER_get0_name(di->decoder), | |
306 | OSSL_DECODER_get0_properties(di->decoder)); | |
de5008a4 RL |
307 | } OSSL_TRACE_END(DECODER); |
308 | } | |
309 | return ok; | |
63f187cf RL |
310 | } |
311 | ||
48b62fb3 | 312 | int OSSL_DECODER_CTX_add_decoder(OSSL_DECODER_CTX *ctx, OSSL_DECODER *decoder) |
63f187cf RL |
313 | { |
314 | OSSL_DECODER_INSTANCE *decoder_inst = NULL; | |
315 | const OSSL_PROVIDER *prov = NULL; | |
316 | void *decoderctx = NULL; | |
317 | void *provctx = NULL; | |
318 | ||
319 | if (!ossl_assert(ctx != NULL) || !ossl_assert(decoder != NULL)) { | |
320 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_PASSED_NULL_PARAMETER); | |
321 | return 0; | |
322 | } | |
323 | ||
ed576acd | 324 | prov = OSSL_DECODER_get0_provider(decoder); |
63f187cf RL |
325 | provctx = OSSL_PROVIDER_get0_provider_ctx(prov); |
326 | ||
327 | if ((decoderctx = decoder->newctx(provctx)) == NULL | |
328 | || (decoder_inst = | |
329 | ossl_decoder_instance_new(decoder, decoderctx)) == NULL) | |
330 | goto err; | |
331 | /* Avoid double free of decoderctx on further errors */ | |
332 | decoderctx = NULL; | |
333 | ||
334 | if (!ossl_decoder_ctx_add_decoder_inst(ctx, decoder_inst)) | |
335 | goto err; | |
336 | ||
337 | return 1; | |
338 | err: | |
339 | ossl_decoder_instance_free(decoder_inst); | |
340 | if (decoderctx != NULL) | |
341 | decoder->freectx(decoderctx); | |
ece9304c RL |
342 | return 0; |
343 | } | |
344 | ||
8ea5a6b5 RL |
345 | struct collect_extra_decoder_data_st { |
346 | OSSL_DECODER_CTX *ctx; | |
347 | const char *output_type; | |
24755445 HL |
348 | int output_type_id; |
349 | ||
8ea5a6b5 RL |
350 | /* |
351 | * 0 to check that the decoder's input type is the same as the decoder name | |
352 | * 1 to check that the decoder's input type differs from the decoder name | |
353 | */ | |
354 | enum { IS_SAME = 0, IS_DIFFERENT = 1 } type_check; | |
355 | size_t w_prev_start, w_prev_end; /* "previous" decoders */ | |
356 | size_t w_new_start, w_new_end; /* "new" decoders */ | |
357 | }; | |
358 | ||
f7720869 MC |
359 | DEFINE_STACK_OF(OSSL_DECODER) |
360 | ||
361 | static void collect_all_decoders(OSSL_DECODER *decoder, void *arg) | |
362 | { | |
363 | STACK_OF(OSSL_DECODER) *skdecoders = arg; | |
364 | ||
365 | if (OSSL_DECODER_up_ref(decoder)) | |
366 | sk_OSSL_DECODER_push(skdecoders, decoder); | |
367 | } | |
368 | ||
8ea5a6b5 RL |
369 | static void collect_extra_decoder(OSSL_DECODER *decoder, void *arg) |
370 | { | |
371 | struct collect_extra_decoder_data_st *data = arg; | |
372 | size_t j; | |
373 | const OSSL_PROVIDER *prov = OSSL_DECODER_get0_provider(decoder); | |
374 | void *provctx = OSSL_PROVIDER_get0_provider_ctx(prov); | |
375 | ||
24755445 | 376 | if (ossl_decoder_fast_is_a(decoder, data->output_type, &data->output_type_id)) { |
8ea5a6b5 RL |
377 | void *decoderctx = NULL; |
378 | OSSL_DECODER_INSTANCE *di = NULL; | |
379 | ||
ef2194c4 RL |
380 | OSSL_TRACE_BEGIN(DECODER) { |
381 | BIO_printf(trc_out, | |
382 | "(ctx %p) [%d] Checking out decoder %p:\n" | |
383 | " %s with %s\n", | |
384 | (void *)data->ctx, data->type_check, (void *)decoder, | |
385 | OSSL_DECODER_get0_name(decoder), | |
386 | OSSL_DECODER_get0_properties(decoder)); | |
387 | } OSSL_TRACE_END(DECODER); | |
388 | ||
8ea5a6b5 RL |
389 | /* |
390 | * Check that we don't already have this decoder in our stack, | |
391 | * starting with the previous windows but also looking at what | |
392 | * we have added in the current window. | |
393 | */ | |
394 | for (j = data->w_prev_start; j < data->w_new_end; j++) { | |
395 | OSSL_DECODER_INSTANCE *check_inst = | |
396 | sk_OSSL_DECODER_INSTANCE_value(data->ctx->decoder_insts, j); | |
397 | ||
ef2194c4 | 398 | if (decoder->base.algodef == check_inst->decoder->base.algodef) { |
8ea5a6b5 | 399 | /* We found it, so don't do anything more */ |
ef2194c4 RL |
400 | OSSL_TRACE_BEGIN(DECODER) { |
401 | BIO_printf(trc_out, | |
402 | " REJECTED: already exists in the chain\n"); | |
403 | } OSSL_TRACE_END(DECODER); | |
8ea5a6b5 | 404 | return; |
ef2194c4 | 405 | } |
8ea5a6b5 RL |
406 | } |
407 | ||
408 | if ((decoderctx = decoder->newctx(provctx)) == NULL) | |
409 | return; | |
410 | ||
411 | if ((di = ossl_decoder_instance_new(decoder, decoderctx)) == NULL) { | |
412 | decoder->freectx(decoderctx); | |
413 | return; | |
414 | } | |
415 | ||
416 | switch (data->type_check) { | |
417 | case IS_SAME: | |
418 | /* If it differs, this is not a decoder to add for now. */ | |
24755445 HL |
419 | if (!ossl_decoder_fast_is_a(decoder, |
420 | OSSL_DECODER_INSTANCE_get_input_type(di), | |
421 | &di->input_type_id)) { | |
8ea5a6b5 | 422 | ossl_decoder_instance_free(di); |
ef2194c4 RL |
423 | OSSL_TRACE_BEGIN(DECODER) { |
424 | BIO_printf(trc_out, | |
425 | " REJECTED: input type doesn't match output type\n"); | |
426 | } OSSL_TRACE_END(DECODER); | |
8ea5a6b5 RL |
427 | return; |
428 | } | |
429 | break; | |
430 | case IS_DIFFERENT: | |
431 | /* If it's the same, this is not a decoder to add for now. */ | |
24755445 HL |
432 | if (ossl_decoder_fast_is_a(decoder, |
433 | OSSL_DECODER_INSTANCE_get_input_type(di), | |
434 | &di->input_type_id)) { | |
8ea5a6b5 | 435 | ossl_decoder_instance_free(di); |
ef2194c4 RL |
436 | OSSL_TRACE_BEGIN(DECODER) { |
437 | BIO_printf(trc_out, | |
438 | " REJECTED: input type matches output type\n"); | |
439 | } OSSL_TRACE_END(DECODER); | |
8ea5a6b5 RL |
440 | return; |
441 | } | |
442 | break; | |
443 | } | |
444 | ||
445 | /* | |
446 | * Apart from keeping w_new_end up to date, We don't care about | |
447 | * errors here. If it doesn't collect, then it doesn't... | |
448 | */ | |
449 | if (!ossl_decoder_ctx_add_decoder_inst(data->ctx, di)) { | |
450 | ossl_decoder_instance_free(di); | |
451 | return; | |
452 | } | |
453 | ||
454 | data->w_new_end++; | |
455 | } | |
456 | } | |
457 | ||
ece9304c | 458 | int OSSL_DECODER_CTX_add_extra(OSSL_DECODER_CTX *ctx, |
b4250010 | 459 | OSSL_LIB_CTX *libctx, const char *propq) |
ece9304c RL |
460 | { |
461 | /* | |
462 | * This function goes through existing decoder methods in | |
463 | * |ctx->decoder_insts|, and tries to fetch new decoders that produce | |
464 | * what the existing ones want as input, and push those newly fetched | |
465 | * decoders on top of the same stack. | |
466 | * Then it does the same again, but looping over the newly fetched | |
ebfdb63d | 467 | * decoders, until there are no more decoders to be fetched, or |
ece9304c RL |
468 | * when we have done this 10 times. |
469 | * | |
470 | * we do this with sliding windows on the stack by keeping track of indexes | |
471 | * and of the end. | |
472 | * | |
473 | * +----------------+ | |
474 | * | DER to RSA | <--- w_prev_start | |
475 | * +----------------+ | |
476 | * | DER to DSA | | |
477 | * +----------------+ | |
478 | * | DER to DH | | |
479 | * +----------------+ | |
480 | * | PEM to DER | <--- w_prev_end, w_new_start | |
481 | * +----------------+ | |
482 | * <--- w_new_end | |
483 | */ | |
8ea5a6b5 | 484 | struct collect_extra_decoder_data_st data; |
ece9304c | 485 | size_t depth = 0; /* Counts the number of iterations */ |
8ea5a6b5 | 486 | size_t count; /* Calculates how many were added in each iteration */ |
f7720869 MC |
487 | size_t numdecoders; |
488 | STACK_OF(OSSL_DECODER) *skdecoders; | |
ece9304c RL |
489 | |
490 | if (!ossl_assert(ctx != NULL)) { | |
491 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_PASSED_NULL_PARAMETER); | |
492 | return 0; | |
493 | } | |
494 | ||
495 | /* | |
496 | * If there is no stack of OSSL_DECODER_INSTANCE, we have nothing | |
497 | * more to add. That's fine. | |
498 | */ | |
499 | if (ctx->decoder_insts == NULL) | |
500 | return 1; | |
501 | ||
ef2194c4 RL |
502 | OSSL_TRACE_BEGIN(DECODER) { |
503 | BIO_printf(trc_out, "(ctx %p) Looking for extra decoders\n", | |
504 | (void *)ctx); | |
505 | } OSSL_TRACE_END(DECODER); | |
506 | ||
f7720869 MC |
507 | |
508 | skdecoders = sk_OSSL_DECODER_new_null(); | |
509 | if (skdecoders == NULL) { | |
510 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_MALLOC_FAILURE); | |
511 | return 0; | |
512 | } | |
513 | OSSL_DECODER_do_all_provided(libctx, collect_all_decoders, skdecoders); | |
514 | numdecoders = sk_OSSL_DECODER_num(skdecoders); | |
515 | ||
8ea5a6b5 RL |
516 | memset(&data, 0, sizeof(data)); |
517 | data.ctx = ctx; | |
518 | data.w_prev_start = 0; | |
519 | data.w_prev_end = sk_OSSL_DECODER_INSTANCE_num(ctx->decoder_insts); | |
ece9304c | 520 | do { |
f7720869 | 521 | size_t i, j; |
ece9304c | 522 | |
8ea5a6b5 | 523 | data.w_new_start = data.w_new_end = data.w_prev_end; |
ece9304c | 524 | |
8ea5a6b5 RL |
525 | /* |
526 | * Two iterations: | |
527 | * 0. All decoders that have the same name as their input type. | |
528 | * This allows for decoders that unwrap some data in a specific | |
529 | * encoding, and pass the result on with the same encoding. | |
530 | * 1. All decoders that a different name than their input type. | |
531 | */ | |
532 | for (data.type_check = IS_SAME; | |
533 | data.type_check <= IS_DIFFERENT; | |
534 | data.type_check++) { | |
535 | for (i = data.w_prev_start; i < data.w_prev_end; i++) { | |
536 | OSSL_DECODER_INSTANCE *decoder_inst = | |
537 | sk_OSSL_DECODER_INSTANCE_value(ctx->decoder_insts, i); | |
ece9304c | 538 | |
8ea5a6b5 RL |
539 | data.output_type |
540 | = OSSL_DECODER_INSTANCE_get_input_type(decoder_inst); | |
541 | ||
24755445 | 542 | data.output_type_id = 0; |
8ea5a6b5 | 543 | |
f7720869 MC |
544 | for (j = 0; j < numdecoders; j++) |
545 | collect_extra_decoder(sk_OSSL_DECODER_value(skdecoders, j), | |
546 | &data); | |
8ea5a6b5 | 547 | } |
ece9304c RL |
548 | } |
549 | /* How many were added in this iteration */ | |
8ea5a6b5 | 550 | count = data.w_new_end - data.w_new_start; |
ece9304c RL |
551 | |
552 | /* Slide the "previous decoder" windows */ | |
8ea5a6b5 RL |
553 | data.w_prev_start = data.w_new_start; |
554 | data.w_prev_end = data.w_new_end; | |
ece9304c RL |
555 | |
556 | depth++; | |
557 | } while (count != 0 && depth <= 10); | |
558 | ||
f7720869 | 559 | sk_OSSL_DECODER_pop_free(skdecoders, OSSL_DECODER_free); |
ece9304c RL |
560 | return 1; |
561 | } | |
562 | ||
48b62fb3 | 563 | int OSSL_DECODER_CTX_get_num_decoders(OSSL_DECODER_CTX *ctx) |
ece9304c RL |
564 | { |
565 | if (ctx == NULL || ctx->decoder_insts == NULL) | |
566 | return 0; | |
567 | return sk_OSSL_DECODER_INSTANCE_num(ctx->decoder_insts); | |
568 | } | |
569 | ||
570 | int OSSL_DECODER_CTX_set_construct(OSSL_DECODER_CTX *ctx, | |
571 | OSSL_DECODER_CONSTRUCT *construct) | |
572 | { | |
573 | if (!ossl_assert(ctx != NULL)) { | |
574 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_PASSED_NULL_PARAMETER); | |
575 | return 0; | |
576 | } | |
577 | ctx->construct = construct; | |
578 | return 1; | |
579 | } | |
580 | ||
581 | int OSSL_DECODER_CTX_set_construct_data(OSSL_DECODER_CTX *ctx, | |
582 | void *construct_data) | |
583 | { | |
584 | if (!ossl_assert(ctx != NULL)) { | |
585 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_PASSED_NULL_PARAMETER); | |
586 | return 0; | |
587 | } | |
588 | ctx->construct_data = construct_data; | |
589 | return 1; | |
590 | } | |
591 | ||
592 | int OSSL_DECODER_CTX_set_cleanup(OSSL_DECODER_CTX *ctx, | |
593 | OSSL_DECODER_CLEANUP *cleanup) | |
594 | { | |
595 | if (!ossl_assert(ctx != NULL)) { | |
596 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_PASSED_NULL_PARAMETER); | |
597 | return 0; | |
598 | } | |
599 | ctx->cleanup = cleanup; | |
600 | return 1; | |
601 | } | |
602 | ||
603 | OSSL_DECODER_CONSTRUCT * | |
604 | OSSL_DECODER_CTX_get_construct(OSSL_DECODER_CTX *ctx) | |
605 | { | |
606 | if (ctx == NULL) | |
607 | return NULL; | |
608 | return ctx->construct; | |
609 | } | |
610 | ||
611 | void *OSSL_DECODER_CTX_get_construct_data(OSSL_DECODER_CTX *ctx) | |
612 | { | |
613 | if (ctx == NULL) | |
614 | return NULL; | |
615 | return ctx->construct_data; | |
616 | } | |
617 | ||
618 | OSSL_DECODER_CLEANUP * | |
619 | OSSL_DECODER_CTX_get_cleanup(OSSL_DECODER_CTX *ctx) | |
620 | { | |
621 | if (ctx == NULL) | |
622 | return NULL; | |
623 | return ctx->cleanup; | |
624 | } | |
625 | ||
626 | int OSSL_DECODER_export(OSSL_DECODER_INSTANCE *decoder_inst, | |
627 | void *reference, size_t reference_sz, | |
628 | OSSL_CALLBACK *export_cb, void *export_cbarg) | |
629 | { | |
48b62fb3 RL |
630 | OSSL_DECODER *decoder = NULL; |
631 | void *decoderctx = NULL; | |
632 | ||
ece9304c RL |
633 | if (!(ossl_assert(decoder_inst != NULL) |
634 | && ossl_assert(reference != NULL) | |
635 | && ossl_assert(export_cb != NULL) | |
636 | && ossl_assert(export_cbarg != NULL))) { | |
637 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_PASSED_NULL_PARAMETER); | |
638 | return 0; | |
639 | } | |
640 | ||
48b62fb3 RL |
641 | decoder = OSSL_DECODER_INSTANCE_get_decoder(decoder_inst); |
642 | decoderctx = OSSL_DECODER_INSTANCE_get_decoder_ctx(decoder_inst); | |
643 | return decoder->export_object(decoderctx, reference, reference_sz, | |
644 | export_cb, export_cbarg); | |
ece9304c RL |
645 | } |
646 | ||
48b62fb3 RL |
647 | OSSL_DECODER * |
648 | OSSL_DECODER_INSTANCE_get_decoder(OSSL_DECODER_INSTANCE *decoder_inst) | |
ece9304c RL |
649 | { |
650 | if (decoder_inst == NULL) | |
651 | return NULL; | |
652 | return decoder_inst->decoder; | |
653 | } | |
654 | ||
48b62fb3 RL |
655 | void * |
656 | OSSL_DECODER_INSTANCE_get_decoder_ctx(OSSL_DECODER_INSTANCE *decoder_inst) | |
ece9304c RL |
657 | { |
658 | if (decoder_inst == NULL) | |
659 | return NULL; | |
bd7a6f16 | 660 | return decoder_inst->decoderctx; |
ece9304c RL |
661 | } |
662 | ||
48b62fb3 RL |
663 | const char * |
664 | OSSL_DECODER_INSTANCE_get_input_type(OSSL_DECODER_INSTANCE *decoder_inst) | |
665 | { | |
666 | if (decoder_inst == NULL) | |
667 | return NULL; | |
668 | return decoder_inst->input_type; | |
669 | } | |
670 | ||
ebfdb63d RL |
671 | const char * |
672 | OSSL_DECODER_INSTANCE_get_input_structure(OSSL_DECODER_INSTANCE *decoder_inst, | |
673 | int *was_set) | |
674 | { | |
675 | if (decoder_inst == NULL) | |
676 | return NULL; | |
677 | *was_set = decoder_inst->flag_input_structure_was_set; | |
678 | return decoder_inst->input_structure; | |
679 | } | |
680 | ||
ece9304c RL |
681 | static int decoder_process(const OSSL_PARAM params[], void *arg) |
682 | { | |
683 | struct decoder_process_data_st *data = arg; | |
684 | OSSL_DECODER_CTX *ctx = data->ctx; | |
685 | OSSL_DECODER_INSTANCE *decoder_inst = NULL; | |
686 | OSSL_DECODER *decoder = NULL; | |
141cc94e | 687 | OSSL_CORE_BIO *cbio = NULL; |
ece9304c RL |
688 | BIO *bio = data->bio; |
689 | long loc; | |
690 | size_t i; | |
f9965953 | 691 | int ok = 0; |
ece9304c RL |
692 | /* For recursions */ |
693 | struct decoder_process_data_st new_data; | |
acf497b5 RL |
694 | const char *data_type = NULL; |
695 | const char *data_structure = NULL; | |
ece9304c | 696 | |
f9965953 RL |
697 | /* |
698 | * This is an indicator up the call stack that something was indeed | |
699 | * decoded, leading to a recursive call of this function. | |
700 | */ | |
701 | data->flag_next_level_called = 1; | |
702 | ||
ece9304c RL |
703 | memset(&new_data, 0, sizeof(new_data)); |
704 | new_data.ctx = data->ctx; | |
57acc56b RL |
705 | new_data.recursion = data->recursion + 1; |
706 | ||
707 | #define LEVEL_STR ">>>>>>>>>>>>>>>>" | |
708 | #define LEVEL (new_data.recursion < sizeof(LEVEL_STR) \ | |
709 | ? &LEVEL_STR[sizeof(LEVEL_STR) - new_data.recursion - 1] \ | |
710 | : LEVEL_STR "...") | |
ece9304c RL |
711 | |
712 | if (params == NULL) { | |
713 | /* First iteration, where we prepare for what is to come */ | |
714 | ||
57acc56b RL |
715 | OSSL_TRACE_BEGIN(DECODER) { |
716 | BIO_printf(trc_out, | |
717 | "(ctx %p) starting to walk the decoder chain\n", | |
718 | (void *)new_data.ctx); | |
719 | } OSSL_TRACE_END(DECODER); | |
720 | ||
bd7a6f16 | 721 | data->current_decoder_inst_index = |
48b62fb3 | 722 | OSSL_DECODER_CTX_get_num_decoders(ctx); |
ece9304c RL |
723 | |
724 | bio = data->bio; | |
725 | } else { | |
726 | const OSSL_PARAM *p; | |
57acc56b | 727 | const char *trace_data_structure; |
ece9304c RL |
728 | |
729 | decoder_inst = | |
730 | sk_OSSL_DECODER_INSTANCE_value(ctx->decoder_insts, | |
bd7a6f16 | 731 | data->current_decoder_inst_index); |
48b62fb3 | 732 | decoder = OSSL_DECODER_INSTANCE_get_decoder(decoder_inst); |
ece9304c | 733 | |
f9965953 RL |
734 | data->flag_construct_called = 0; |
735 | if (ctx->construct != NULL) { | |
ef2194c4 RL |
736 | int rv; |
737 | ||
738 | OSSL_TRACE_BEGIN(DECODER) { | |
739 | BIO_printf(trc_out, | |
740 | "(ctx %p) %s Running constructor\n", | |
741 | (void *)new_data.ctx, LEVEL); | |
742 | } OSSL_TRACE_END(DECODER); | |
743 | ||
744 | rv = ctx->construct(decoder_inst, params, ctx->construct_data); | |
745 | ||
746 | OSSL_TRACE_BEGIN(DECODER) { | |
747 | BIO_printf(trc_out, | |
748 | "(ctx %p) %s Running constructor => %d\n", | |
749 | (void *)new_data.ctx, LEVEL, rv); | |
750 | } OSSL_TRACE_END(DECODER); | |
f9965953 RL |
751 | |
752 | data->flag_construct_called = 1; | |
753 | ok = (rv > 0); | |
754 | if (ok) | |
755 | goto end; | |
ece9304c RL |
756 | } |
757 | ||
758 | /* The constructor didn't return success */ | |
759 | ||
760 | /* | |
761 | * so we try to use the object we got and feed it to any next | |
762 | * decoder that will take it. Object references are not | |
763 | * allowed for this. | |
764 | * If this data isn't present, decoding has failed. | |
765 | */ | |
766 | ||
14c8a3d1 | 767 | p = OSSL_PARAM_locate_const(params, OSSL_OBJECT_PARAM_DATA); |
ece9304c RL |
768 | if (p == NULL || p->data_type != OSSL_PARAM_OCTET_STRING) |
769 | goto end; | |
770 | new_data.bio = BIO_new_mem_buf(p->data, (int)p->data_size); | |
771 | if (new_data.bio == NULL) | |
772 | goto end; | |
773 | bio = new_data.bio; | |
ecadfdad | 774 | |
acf497b5 | 775 | /* Get the data type if there is one */ |
ecadfdad | 776 | p = OSSL_PARAM_locate_const(params, OSSL_OBJECT_PARAM_DATA_TYPE); |
acf497b5 | 777 | if (p != NULL && !OSSL_PARAM_get_utf8_string_ptr(p, &data_type)) |
ecadfdad | 778 | goto end; |
acf497b5 RL |
779 | |
780 | /* Get the data structure if there is one */ | |
781 | p = OSSL_PARAM_locate_const(params, OSSL_OBJECT_PARAM_DATA_STRUCTURE); | |
782 | if (p != NULL && !OSSL_PARAM_get_utf8_string_ptr(p, &data_structure)) | |
783 | goto end; | |
784 | ||
785 | /* | |
786 | * If the data structure is "type-specific" and the data type is | |
787 | * given, we drop the data structure. The reasoning is that the | |
788 | * data type is already enough to find the applicable next decoder, | |
789 | * so an additional "type-specific" data structure is extraneous. | |
790 | * | |
791 | * Furthermore, if the OSSL_DECODER caller asked for a type specific | |
792 | * structure under another name, such as "DH", we get a mismatch | |
793 | * if the data structure we just received is "type-specific". | |
794 | * There's only so much you can do without infusing this code with | |
795 | * too special knowledge. | |
796 | */ | |
57acc56b | 797 | trace_data_structure = data_structure; |
a8275fbc | 798 | if (data_type != NULL && data_structure != NULL |
fba140c7 | 799 | && OPENSSL_strcasecmp(data_structure, "type-specific") == 0) |
acf497b5 | 800 | data_structure = NULL; |
57acc56b RL |
801 | |
802 | OSSL_TRACE_BEGIN(DECODER) { | |
803 | BIO_printf(trc_out, | |
804 | "(ctx %p) %s incoming from previous decoder (%p):\n" | |
805 | " data type: %s, data structure: %s%s\n", | |
806 | (void *)new_data.ctx, LEVEL, (void *)decoder, | |
807 | data_type, trace_data_structure, | |
808 | (trace_data_structure == data_structure | |
809 | ? "" : " (dropped)")); | |
810 | } OSSL_TRACE_END(DECODER); | |
ece9304c RL |
811 | } |
812 | ||
813 | /* | |
814 | * If we have no more decoders to look through at this point, | |
815 | * we failed | |
816 | */ | |
bd7a6f16 | 817 | if (data->current_decoder_inst_index == 0) |
ece9304c RL |
818 | goto end; |
819 | ||
820 | if ((loc = BIO_tell(bio)) < 0) { | |
821 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_BIO_LIB); | |
822 | goto end; | |
823 | } | |
824 | ||
141cc94e P |
825 | if ((cbio = ossl_core_bio_new_from_bio(bio)) == NULL) { |
826 | ERR_raise(ERR_LIB_OSSL_DECODER, ERR_R_MALLOC_FAILURE); | |
827 | goto end; | |
828 | } | |
829 | ||
bd7a6f16 RL |
830 | for (i = data->current_decoder_inst_index; i-- > 0;) { |
831 | OSSL_DECODER_INSTANCE *new_decoder_inst = | |
ece9304c | 832 | sk_OSSL_DECODER_INSTANCE_value(ctx->decoder_insts, i); |
bd7a6f16 | 833 | OSSL_DECODER *new_decoder = |
48b62fb3 RL |
834 | OSSL_DECODER_INSTANCE_get_decoder(new_decoder_inst); |
835 | void *new_decoderctx = | |
836 | OSSL_DECODER_INSTANCE_get_decoder_ctx(new_decoder_inst); | |
837 | const char *new_input_type = | |
838 | OSSL_DECODER_INSTANCE_get_input_type(new_decoder_inst); | |
acf497b5 RL |
839 | int n_i_s_was_set = 0; /* We don't care here */ |
840 | const char *new_input_structure = | |
841 | OSSL_DECODER_INSTANCE_get_input_structure(new_decoder_inst, | |
842 | &n_i_s_was_set); | |
ece9304c | 843 | |
57acc56b RL |
844 | OSSL_TRACE_BEGIN(DECODER) { |
845 | BIO_printf(trc_out, | |
ef2194c4 RL |
846 | "(ctx %p) %s [%u] Considering decoder instance %p (decoder %p):\n" |
847 | " %s with %s\n", | |
57acc56b | 848 | (void *)new_data.ctx, LEVEL, (unsigned int)i, |
ef2194c4 RL |
849 | (void *)new_decoder_inst, (void *)new_decoder, |
850 | OSSL_DECODER_get0_name(new_decoder), | |
851 | OSSL_DECODER_get0_properties(new_decoder)); | |
57acc56b RL |
852 | } OSSL_TRACE_END(DECODER); |
853 | ||
ece9304c RL |
854 | /* |
855 | * If |decoder| is NULL, it means we've just started, and the caller | |
856 | * may have specified what it expects the initial input to be. If | |
857 | * that's the case, we do this extra check. | |
858 | */ | |
859 | if (decoder == NULL && ctx->start_input_type != NULL | |
fba140c7 | 860 | && OPENSSL_strcasecmp(ctx->start_input_type, new_input_type) != 0) { |
57acc56b RL |
861 | OSSL_TRACE_BEGIN(DECODER) { |
862 | BIO_printf(trc_out, | |
863 | "(ctx %p) %s [%u] the start input type '%s' doesn't match the input type of the considered decoder, skipping...\n", | |
864 | (void *)new_data.ctx, LEVEL, (unsigned int)i, | |
865 | ctx->start_input_type); | |
866 | } OSSL_TRACE_END(DECODER); | |
ece9304c | 867 | continue; |
57acc56b | 868 | } |
ece9304c RL |
869 | |
870 | /* | |
871 | * If we have a previous decoder, we check that the input type | |
872 | * of the next to be used matches the type of this previous one. | |
acf497b5 RL |
873 | * |new_input_type| holds the value of the "input-type" parameter |
874 | * for the decoder we're currently considering. | |
ece9304c | 875 | */ |
24755445 HL |
876 | if (decoder != NULL && !ossl_decoder_fast_is_a(decoder, new_input_type, |
877 | &new_decoder_inst->input_type_id)) { | |
57acc56b RL |
878 | OSSL_TRACE_BEGIN(DECODER) { |
879 | BIO_printf(trc_out, | |
880 | "(ctx %p) %s [%u] the input type doesn't match the name of the previous decoder (%p), skipping...\n", | |
881 | (void *)new_data.ctx, LEVEL, (unsigned int)i, | |
882 | (void *)decoder); | |
883 | } OSSL_TRACE_END(DECODER); | |
ece9304c | 884 | continue; |
57acc56b | 885 | } |
ece9304c | 886 | |
ecadfdad | 887 | /* |
acf497b5 | 888 | * If the previous decoder gave us a data type, we check to see |
ecadfdad RL |
889 | * if that matches the decoder we're currently considering. |
890 | */ | |
57acc56b RL |
891 | if (data_type != NULL && !OSSL_DECODER_is_a(new_decoder, data_type)) { |
892 | OSSL_TRACE_BEGIN(DECODER) { | |
893 | BIO_printf(trc_out, | |
894 | "(ctx %p) %s [%u] the previous decoder's data type doesn't match the name of the considered decoder, skipping...\n", | |
895 | (void *)new_data.ctx, LEVEL, (unsigned int)i); | |
896 | } OSSL_TRACE_END(DECODER); | |
acf497b5 | 897 | continue; |
57acc56b | 898 | } |
acf497b5 RL |
899 | |
900 | /* | |
901 | * If the previous decoder gave us a data structure name, we check | |
902 | * to see that it matches the input data structure of the decoder | |
903 | * we're currently considering. | |
904 | */ | |
905 | if (data_structure != NULL | |
906 | && (new_input_structure == NULL | |
fba140c7 DB |
907 | || OPENSSL_strcasecmp(data_structure, |
908 | new_input_structure) != 0)) { | |
57acc56b RL |
909 | OSSL_TRACE_BEGIN(DECODER) { |
910 | BIO_printf(trc_out, | |
911 | "(ctx %p) %s [%u] the previous decoder's data structure doesn't match the input structure of the considered decoder, skipping...\n", | |
912 | (void *)new_data.ctx, LEVEL, (unsigned int)i); | |
913 | } OSSL_TRACE_END(DECODER); | |
ecadfdad | 914 | continue; |
57acc56b | 915 | } |
ecadfdad | 916 | |
73dd5d67 RL |
917 | /* |
918 | * If the decoder we're currently considering specifies a structure, | |
919 | * and this check hasn't already been done earlier in this chain of | |
920 | * decoder_process() calls, check that it matches the user provided | |
921 | * input structure, if one is given. | |
922 | */ | |
923 | if (!data->flag_input_structure_checked | |
924 | && ctx->input_structure != NULL | |
925 | && new_input_structure != NULL) { | |
926 | data->flag_input_structure_checked = 1; | |
fba140c7 DB |
927 | if (OPENSSL_strcasecmp(new_input_structure, |
928 | ctx->input_structure) != 0) { | |
73dd5d67 RL |
929 | OSSL_TRACE_BEGIN(DECODER) { |
930 | BIO_printf(trc_out, | |
931 | "(ctx %p) %s [%u] the previous decoder's data structure doesn't match the input structure given by the user, skipping...\n", | |
932 | (void *)new_data.ctx, LEVEL, (unsigned int)i); | |
933 | } OSSL_TRACE_END(DECODER); | |
934 | continue; | |
935 | } | |
936 | } | |
937 | ||
ece9304c RL |
938 | /* |
939 | * Checking the return value of BIO_reset() or BIO_seek() is unsafe. | |
940 | * Furthermore, BIO_reset() is unsafe to use if the source BIO happens | |
941 | * to be a BIO_s_mem(), because the earlier BIO_tell() gives us zero | |
942 | * no matter where we are in the underlying buffer we're reading from. | |
943 | * | |
944 | * So, we simply do a BIO_seek(), and use BIO_tell() that we're back | |
945 | * at the same position. This is a best effort attempt, but BIO_seek() | |
946 | * and BIO_tell() should come as a pair... | |
947 | */ | |
948 | (void)BIO_seek(bio, loc); | |
949 | if (BIO_tell(bio) != loc) | |
950 | goto end; | |
951 | ||
952 | /* Recurse */ | |
57acc56b RL |
953 | OSSL_TRACE_BEGIN(DECODER) { |
954 | BIO_printf(trc_out, | |
955 | "(ctx %p) %s [%u] Running decoder instance %p\n", | |
956 | (void *)new_data.ctx, LEVEL, (unsigned int)i, | |
957 | (void *)new_decoder_inst); | |
958 | } OSSL_TRACE_END(DECODER); | |
959 | ||
f9965953 RL |
960 | /* |
961 | * We only care about errors reported from decoder implementations | |
962 | * if it returns false (i.e. there was a fatal error). | |
963 | */ | |
964 | ERR_set_mark(); | |
965 | ||
bd7a6f16 | 966 | new_data.current_decoder_inst_index = i; |
73dd5d67 RL |
967 | new_data.flag_input_structure_checked |
968 | = data->flag_input_structure_checked; | |
141cc94e | 969 | ok = new_decoder->decode(new_decoderctx, cbio, |
ebfdb63d | 970 | new_data.ctx->selection, |
bd7a6f16 RL |
971 | decoder_process, &new_data, |
972 | ossl_pw_passphrase_callback_dec, | |
973 | &new_data.ctx->pwdata); | |
de5008a4 RL |
974 | |
975 | OSSL_TRACE_BEGIN(DECODER) { | |
976 | BIO_printf(trc_out, | |
f9965953 RL |
977 | "(ctx %p) %s [%u] Running decoder instance %p => %d" |
978 | " (recursed further: %s, construct called: %s)\n", | |
57acc56b | 979 | (void *)new_data.ctx, LEVEL, (unsigned int)i, |
f9965953 RL |
980 | (void *)new_decoder_inst, ok, |
981 | new_data.flag_next_level_called ? "yes" : "no", | |
982 | new_data.flag_construct_called ? "yes" : "no"); | |
de5008a4 RL |
983 | } OSSL_TRACE_END(DECODER); |
984 | ||
f9965953 RL |
985 | data->flag_construct_called = new_data.flag_construct_called; |
986 | ||
987 | /* Break on error or if we tried to construct an object already */ | |
988 | if (!ok || data->flag_construct_called) { | |
989 | ERR_clear_last_mark(); | |
ece9304c | 990 | break; |
f9965953 RL |
991 | } |
992 | ERR_pop_to_mark(); | |
acf497b5 RL |
993 | |
994 | /* | |
f9965953 RL |
995 | * Break if the decoder implementation that we called recursed, since |
996 | * that indicates that it successfully decoded something. | |
acf497b5 | 997 | */ |
f9965953 RL |
998 | if (new_data.flag_next_level_called) |
999 | break; | |
ece9304c RL |
1000 | } |
1001 | ||
1002 | end: | |
141cc94e | 1003 | ossl_core_bio_free(cbio); |
ece9304c RL |
1004 | BIO_free(new_data.bio); |
1005 | return ok; | |
1006 | } |