tasn_prn.c revision 306196 
1/* tasn_prn.c */
2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 2000.
5 */
6/* ====================================================================
7 * Copyright (c) 2000,2005 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
14 *    notice, this list of conditions and the following disclaimer.
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 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com).  This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60#include <stddef.h>
61#include "cryptlib.h"
62#include <openssl/asn1.h>
63#include <openssl/asn1t.h>
64#include <openssl/objects.h>
65#include <openssl/buffer.h>
66#include <openssl/err.h>
67#include <openssl/x509v3.h>
68#include "asn1_locl.h"
69
70/*
71 * Print routines.
72 */
73
74/* ASN1_PCTX routines */
75
76ASN1_PCTX default_pctx = {
77    ASN1_PCTX_FLAGS_SHOW_ABSENT, /* flags */
78    0,                          /* nm_flags */
79    0,                          /* cert_flags */
80    0,                          /* oid_flags */
81    0                           /* str_flags */
82};
83
84ASN1_PCTX *ASN1_PCTX_new(void)
85{
86    ASN1_PCTX *ret;
87    ret = OPENSSL_malloc(sizeof(ASN1_PCTX));
88    if (ret == NULL) {
89        ASN1err(ASN1_F_ASN1_PCTX_NEW, ERR_R_MALLOC_FAILURE);
90        return NULL;
91    }
92    ret->flags = 0;
93    ret->nm_flags = 0;
94    ret->cert_flags = 0;
95    ret->oid_flags = 0;
96    ret->str_flags = 0;
97    return ret;
98}
99
100void ASN1_PCTX_free(ASN1_PCTX *p)
101{
102    OPENSSL_free(p);
103}
104
105unsigned long ASN1_PCTX_get_flags(ASN1_PCTX *p)
106{
107    return p->flags;
108}
109
110void ASN1_PCTX_set_flags(ASN1_PCTX *p, unsigned long flags)
111{
112    p->flags = flags;
113}
114
115unsigned long ASN1_PCTX_get_nm_flags(ASN1_PCTX *p)
116{
117    return p->nm_flags;
118}
119
120void ASN1_PCTX_set_nm_flags(ASN1_PCTX *p, unsigned long flags)
121{
122    p->nm_flags = flags;
123}
124
125unsigned long ASN1_PCTX_get_cert_flags(ASN1_PCTX *p)
126{
127    return p->cert_flags;
128}
129
130void ASN1_PCTX_set_cert_flags(ASN1_PCTX *p, unsigned long flags)
131{
132    p->cert_flags = flags;
133}
134
135unsigned long ASN1_PCTX_get_oid_flags(ASN1_PCTX *p)
136{
137    return p->oid_flags;
138}
139
140void ASN1_PCTX_set_oid_flags(ASN1_PCTX *p, unsigned long flags)
141{
142    p->oid_flags = flags;
143}
144
145unsigned long ASN1_PCTX_get_str_flags(ASN1_PCTX *p)
146{
147    return p->str_flags;
148}
149
150void ASN1_PCTX_set_str_flags(ASN1_PCTX *p, unsigned long flags)
151{
152    p->str_flags = flags;
153}
154
155/* Main print routines */
156
157static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
158                               const ASN1_ITEM *it,
159                               const char *fname, const char *sname,
160                               int nohdr, const ASN1_PCTX *pctx);
161
162int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
163                            const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx);
164
165static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,
166                                const ASN1_ITEM *it, int indent,
167                                const char *fname, const char *sname,
168                                const ASN1_PCTX *pctx);
169
170static int asn1_print_fsname(BIO *out, int indent,
171                             const char *fname, const char *sname,
172                             const ASN1_PCTX *pctx);
173
174int ASN1_item_print(BIO *out, ASN1_VALUE *ifld, int indent,
175                    const ASN1_ITEM *it, const ASN1_PCTX *pctx)
176{
177    const char *sname;
178    if (pctx == NULL)
179        pctx = &default_pctx;
180    if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
181        sname = NULL;
182    else
183        sname = it->sname;
184    return asn1_item_print_ctx(out, &ifld, indent, it, NULL, sname, 0, pctx);
185}
186
187static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
188                               const ASN1_ITEM *it,
189                               const char *fname, const char *sname,
190                               int nohdr, const ASN1_PCTX *pctx)
191{
192    const ASN1_TEMPLATE *tt;
193    const ASN1_EXTERN_FUNCS *ef;
194    ASN1_VALUE **tmpfld;
195    const ASN1_AUX *aux = it->funcs;
196    ASN1_aux_cb *asn1_cb;
197    ASN1_PRINT_ARG parg;
198    int i;
199    if (aux && aux->asn1_cb) {
200        parg.out = out;
201        parg.indent = indent;
202        parg.pctx = pctx;
203        asn1_cb = aux->asn1_cb;
204    } else
205        asn1_cb = 0;
206
207    if (*fld == NULL) {
208        if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_ABSENT) {
209            if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
210                return 0;
211            if (BIO_puts(out, "<ABSENT>\n") <= 0)
212                return 0;
213        }
214        return 1;
215    }
216
217    switch (it->itype) {
218    case ASN1_ITYPE_PRIMITIVE:
219        if (it->templates) {
220            if (!asn1_template_print_ctx(out, fld, indent,
221                                         it->templates, pctx))
222                return 0;
223            break;
224        }
225        /* fall thru */
226    case ASN1_ITYPE_MSTRING:
227        if (!asn1_primitive_print(out, fld, it, indent, fname, sname, pctx))
228            return 0;
229        break;
230
231    case ASN1_ITYPE_EXTERN:
232        if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
233            return 0;
234        /* Use new style print routine if possible */
235        ef = it->funcs;
236        if (ef && ef->asn1_ex_print) {
237            i = ef->asn1_ex_print(out, fld, indent, "", pctx);
238            if (!i)
239                return 0;
240            if ((i == 2) && (BIO_puts(out, "\n") <= 0))
241                return 0;
242            return 1;
243        } else if (sname &&
244                   BIO_printf(out, ":EXTERNAL TYPE %s\n", sname) <= 0)
245            return 0;
246        break;
247
248    case ASN1_ITYPE_CHOICE:
249#if 0
250        if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
251            return 0;
252#endif
253        /* CHOICE type, get selector */
254        i = asn1_get_choice_selector(fld, it);
255        /* This should never happen... */
256        if ((i < 0) || (i >= it->tcount)) {
257            if (BIO_printf(out, "ERROR: selector [%d] invalid\n", i) <= 0)
258                return 0;
259            return 1;
260        }
261        tt = it->templates + i;
262        tmpfld = asn1_get_field_ptr(fld, tt);
263        if (!asn1_template_print_ctx(out, tmpfld, indent, tt, pctx))
264            return 0;
265        break;
266
267    case ASN1_ITYPE_SEQUENCE:
268    case ASN1_ITYPE_NDEF_SEQUENCE:
269        if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
270            return 0;
271        if (fname || sname) {
272            if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) {
273                if (BIO_puts(out, " {\n") <= 0)
274                    return 0;
275            } else {
276                if (BIO_puts(out, "\n") <= 0)
277                    return 0;
278            }
279        }
280
281        if (asn1_cb) {
282            i = asn1_cb(ASN1_OP_PRINT_PRE, fld, it, &parg);
283            if (i == 0)
284                return 0;
285            if (i == 2)
286                return 1;
287        }
288
289        /* Print each field entry */
290        for (i = 0, tt = it->templates; i < it->tcount; i++, tt++) {
291            const ASN1_TEMPLATE *seqtt;
292            seqtt = asn1_do_adb(fld, tt, 1);
293            if (!seqtt)
294                return 0;
295            tmpfld = asn1_get_field_ptr(fld, seqtt);
296            if (!asn1_template_print_ctx(out, tmpfld,
297                                         indent + 2, seqtt, pctx))
298                return 0;
299        }
300        if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) {
301            if (BIO_printf(out, "%*s}\n", indent, "") < 0)
302                return 0;
303        }
304
305        if (asn1_cb) {
306            i = asn1_cb(ASN1_OP_PRINT_POST, fld, it, &parg);
307            if (i == 0)
308                return 0;
309        }
310        break;
311
312    default:
313        BIO_printf(out, "Unprocessed type %d\n", it->itype);
314        return 0;
315    }
316
317    return 1;
318}
319
320int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
321                            const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx)
322{
323    int i, flags;
324    const char *sname, *fname;
325    flags = tt->flags;
326    if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME)
327        sname = ASN1_ITEM_ptr(tt->item)->sname;
328    else
329        sname = NULL;
330    if (pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
331        fname = NULL;
332    else
333        fname = tt->field_name;
334    if (flags & ASN1_TFLG_SK_MASK) {
335        char *tname;
336        ASN1_VALUE *skitem;
337        STACK_OF(ASN1_VALUE) *stack;
338
339        /* SET OF, SEQUENCE OF */
340        if (fname) {
341            if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SSOF) {
342                if (flags & ASN1_TFLG_SET_OF)
343                    tname = "SET";
344                else
345                    tname = "SEQUENCE";
346                if (BIO_printf(out, "%*s%s OF %s {\n",
347                               indent, "", tname, tt->field_name) <= 0)
348                    return 0;
349            } else if (BIO_printf(out, "%*s%s:\n", indent, "", fname) <= 0)
350                return 0;
351        }
352        stack = (STACK_OF(ASN1_VALUE) *)*fld;
353        for (i = 0; i < sk_ASN1_VALUE_num(stack); i++) {
354            if ((i > 0) && (BIO_puts(out, "\n") <= 0))
355                return 0;
356
357            skitem = sk_ASN1_VALUE_value(stack, i);
358            if (!asn1_item_print_ctx(out, &skitem, indent + 2,
359                                     ASN1_ITEM_ptr(tt->item), NULL, NULL, 1,
360                                     pctx))
361                return 0;
362        }
363        if (!i && BIO_printf(out, "%*s<EMPTY>\n", indent + 2, "") <= 0)
364            return 0;
365        if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) {
366            if (BIO_printf(out, "%*s}\n", indent, "") <= 0)
367                return 0;
368        }
369        return 1;
370    }
371    return asn1_item_print_ctx(out, fld, indent, ASN1_ITEM_ptr(tt->item),
372                               fname, sname, 0, pctx);
373}
374
375static int asn1_print_fsname(BIO *out, int indent,
376                             const char *fname, const char *sname,
377                             const ASN1_PCTX *pctx)
378{
379    static char spaces[] = "                    ";
380    const int nspaces = sizeof(spaces) - 1;
381
382#if 0
383    if (!sname && !fname)
384        return 1;
385#endif
386
387    while (indent > nspaces) {
388        if (BIO_write(out, spaces, nspaces) != nspaces)
389            return 0;
390        indent -= nspaces;
391    }
392    if (BIO_write(out, spaces, indent) != indent)
393        return 0;
394    if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
395        sname = NULL;
396    if (pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
397        fname = NULL;
398    if (!sname && !fname)
399        return 1;
400    if (fname) {
401        if (BIO_puts(out, fname) <= 0)
402            return 0;
403    }
404    if (sname) {
405        if (fname) {
406            if (BIO_printf(out, " (%s)", sname) <= 0)
407                return 0;
408        } else {
409            if (BIO_puts(out, sname) <= 0)
410                return 0;
411        }
412    }
413    if (BIO_write(out, ": ", 2) != 2)
414        return 0;
415    return 1;
416}
417
418static int asn1_print_boolean_ctx(BIO *out, int boolval,
419                                  const ASN1_PCTX *pctx)
420{
421    const char *str;
422    switch (boolval) {
423    case -1:
424        str = "BOOL ABSENT";
425        break;
426
427    case 0:
428        str = "FALSE";
429        break;
430
431    default:
432        str = "TRUE";
433        break;
434
435    }
436
437    if (BIO_puts(out, str) <= 0)
438        return 0;
439    return 1;
440
441}
442
443static int asn1_print_integer_ctx(BIO *out, ASN1_INTEGER *str,
444                                  const ASN1_PCTX *pctx)
445{
446    char *s;
447    int ret = 1;
448    s = i2s_ASN1_INTEGER(NULL, str);
449    if (s == NULL)
450        return 0;
451    if (BIO_puts(out, s) <= 0)
452        ret = 0;
453    OPENSSL_free(s);
454    return ret;
455}
456
457static int asn1_print_oid_ctx(BIO *out, const ASN1_OBJECT *oid,
458                              const ASN1_PCTX *pctx)
459{
460    char objbuf[80];
461    const char *ln;
462    ln = OBJ_nid2ln(OBJ_obj2nid(oid));
463    if (!ln)
464        ln = "";
465    OBJ_obj2txt(objbuf, sizeof objbuf, oid, 1);
466    if (BIO_printf(out, "%s (%s)", ln, objbuf) <= 0)
467        return 0;
468    return 1;
469}
470
471static int asn1_print_obstring_ctx(BIO *out, ASN1_STRING *str, int indent,
472                                   const ASN1_PCTX *pctx)
473{
474    if (str->type == V_ASN1_BIT_STRING) {
475        if (BIO_printf(out, " (%ld unused bits)\n", str->flags & 0x7) <= 0)
476            return 0;
477    } else if (BIO_puts(out, "\n") <= 0)
478        return 0;
479    if ((str->length > 0)
480        && BIO_dump_indent(out, (char *)str->data, str->length,
481                           indent + 2) <= 0)
482        return 0;
483    return 1;
484}
485
486static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,
487                                const ASN1_ITEM *it, int indent,
488                                const char *fname, const char *sname,
489                                const ASN1_PCTX *pctx)
490{
491    long utype;
492    ASN1_STRING *str;
493    int ret = 1, needlf = 1;
494    const char *pname;
495    const ASN1_PRIMITIVE_FUNCS *pf;
496    pf = it->funcs;
497    if (!asn1_print_fsname(out, indent, fname, sname, pctx))
498        return 0;
499    if (pf && pf->prim_print)
500        return pf->prim_print(out, fld, it, indent, pctx);
501    str = (ASN1_STRING *)*fld;
502    if (it->itype == ASN1_ITYPE_MSTRING)
503        utype = str->type & ~V_ASN1_NEG;
504    else
505        utype = it->utype;
506    if (utype == V_ASN1_ANY) {
507        ASN1_TYPE *atype = (ASN1_TYPE *)*fld;
508        utype = atype->type;
509        fld = &atype->value.asn1_value;
510        str = (ASN1_STRING *)*fld;
511        if (pctx->flags & ASN1_PCTX_FLAGS_NO_ANY_TYPE)
512            pname = NULL;
513        else
514            pname = ASN1_tag2str(utype);
515    } else {
516        if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_TYPE)
517            pname = ASN1_tag2str(utype);
518        else
519            pname = NULL;
520    }
521
522    if (utype == V_ASN1_NULL) {
523        if (BIO_puts(out, "NULL\n") <= 0)
524            return 0;
525        return 1;
526    }
527
528    if (pname) {
529        if (BIO_puts(out, pname) <= 0)
530            return 0;
531        if (BIO_puts(out, ":") <= 0)
532            return 0;
533    }
534
535    switch (utype) {
536    case V_ASN1_BOOLEAN:
537        {
538            int boolval = *(int *)fld;
539            if (boolval == -1)
540                boolval = it->size;
541            ret = asn1_print_boolean_ctx(out, boolval, pctx);
542        }
543        break;
544
545    case V_ASN1_INTEGER:
546    case V_ASN1_ENUMERATED:
547        ret = asn1_print_integer_ctx(out, str, pctx);
548        break;
549
550    case V_ASN1_UTCTIME:
551        ret = ASN1_UTCTIME_print(out, str);
552        break;
553
554    case V_ASN1_GENERALIZEDTIME:
555        ret = ASN1_GENERALIZEDTIME_print(out, str);
556        break;
557
558    case V_ASN1_OBJECT:
559        ret = asn1_print_oid_ctx(out, (const ASN1_OBJECT *)*fld, pctx);
560        break;
561
562    case V_ASN1_OCTET_STRING:
563    case V_ASN1_BIT_STRING:
564        ret = asn1_print_obstring_ctx(out, str, indent, pctx);
565        needlf = 0;
566        break;
567
568    case V_ASN1_SEQUENCE:
569    case V_ASN1_SET:
570    case V_ASN1_OTHER:
571        if (BIO_puts(out, "\n") <= 0)
572            return 0;
573        if (ASN1_parse_dump(out, str->data, str->length, indent, 0) <= 0)
574            ret = 0;
575        needlf = 0;
576        break;
577
578    default:
579        ret = ASN1_STRING_print_ex(out, str, pctx->str_flags);
580
581    }
582    if (!ret)
583        return 0;
584    if (needlf && BIO_puts(out, "\n") <= 0)
585        return 0;
586    return 1;
587}
588