/src/openssl/crypto/asn1/asn1_parse.c

Source
/*
 * Copyright 1995-2025 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/objects.h>
#include <openssl/asn1.h>

#ifndef ASN1_PARSE_MAXDEPTH
#define ASN1_PARSE_MAXDEPTH 128
#endif

static int asn1_parse2(BIO *bp, const unsigned char **pp, long length,
    int offset, int depth, int indent, int dump);
static int asn1_print_info(BIO *bp, long offset, int depth, int hl, long len,
    int tag, int xclass, int constructed, int indent)
{
    char str[128];
    const char *p;
    int pop_f_prefix = 0;
    long saved_indent = -1;
    int i = 0;
    BIO *bio = NULL;

    if (constructed & V_ASN1_CONSTRUCTED)
        p = "cons: ";
    else
        p = "prim: ";
    if (constructed != (V_ASN1_CONSTRUCTED | 1)) {
        if (BIO_snprintf(str, sizeof(str), "%5ld:d=%-2d hl=%ld l=%4ld %s",
                offset, depth, (long)hl, len, p)
            <= 0)
            goto err;
    } else {
        if (BIO_snprintf(str, sizeof(str), "%5ld:d=%-2d hl=%ld l=inf  %s",
                offset, depth, (long)hl, p)
            <= 0)
            goto err;
    }
    if (bp != NULL) {
        if (BIO_set_prefix(bp, str) <= 0) {
            if ((bio = BIO_new(BIO_f_prefix())) == NULL
                || (bp = BIO_push(bio, bp)) == NULL)
                goto err;
            pop_f_prefix = 1;
        }
        saved_indent = BIO_get_indent(bp);
        if (BIO_set_prefix(bp, str) <= 0 || BIO_set_indent(bp, indent) <= 0)
            goto err;
    }

    /*
     * BIO_set_prefix made a copy of |str|, so we can safely use it for
     * something else, ASN.1 tag printout.
     */
    p = str;
    if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
        BIO_snprintf(str, sizeof(str), "priv [ %d ] ", tag);
    else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
        BIO_snprintf(str, sizeof(str), "cont [ %d ]", tag);
    else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
        BIO_snprintf(str, sizeof(str), "appl [ %d ]", tag);
    else if (tag > 30)
        BIO_snprintf(str, sizeof(str), "<ASN1 %d>", tag);
    else
        p = ASN1_tag2str(tag);

    i = (BIO_printf(bp, "%-18s", p) > 0);
err:
    if (saved_indent >= 0)
        BIO_set_indent(bp, saved_indent);
    if (pop_f_prefix)
        BIO_pop(bp);
    BIO_free(bio);
    return i;
}

int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent)
{
    return asn1_parse2(bp, &pp, len, 0, 0, indent, 0);
}

int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent,
    int dump)
{
    return asn1_parse2(bp, &pp, len, 0, 0, indent, dump);
}

static int asn1_parse2(BIO *bp, const unsigned char **pp, long length,
    int offset, int depth, int indent, int dump)
{
    const unsigned char *p, *ep, *tot, *op, *opp;
    long len;
    int tag, xclass, ret = 0;
    int nl, hl, j, r;
    ASN1_OBJECT *o = NULL;
    ASN1_OCTET_STRING *os = NULL;
    ASN1_INTEGER *ai = NULL;
    ASN1_ENUMERATED *ae = NULL;
    /* ASN1_BMPSTRING *bmp=NULL; */
    int dump_indent, dump_cont = 0;

    if (depth > ASN1_PARSE_MAXDEPTH) {
        BIO_puts(bp, "BAD RECURSION DEPTH\n");
        return 0;
    }

    dump_indent = 6; /* Because we know BIO_dump_indent() */
    p = *pp;
    tot = p + length;
    while (length > 0) {
        op = p;
        j = ASN1_get_object(&p, &len, &tag, &xclass, length);
        if (j & 0x80) {
            BIO_puts(bp, "Error in encoding\n");
            goto end;
        }
        hl = (int)(p - op);
        length -= hl;
        /*
         * if j == 0x21 it is a constructed indefinite length object
         */
        if (!asn1_print_info(bp, (long)offset + (long)(op - *pp), depth,
                hl, len, tag, xclass, j, (indent) ? depth : 0))
            goto end;
        if (j & V_ASN1_CONSTRUCTED) {
            const unsigned char *sp = p;

            ep = p + len;
            if (BIO_write(bp, "\n", 1) <= 0)
                goto end;
            if (len > length) {
                BIO_printf(bp, "length is greater than %ld\n", length);
                goto end;
            }
            if ((j == 0x21) && (len == 0)) {
                for (;;) {
                    r = asn1_parse2(bp, &p, (long)(tot - p),
                        offset + (int)(p - *pp), depth + 1,
                        indent, dump);
                    if (r == 0)
                        goto end;
                    if ((r == 2) || (p >= tot)) {
                        len = (long)(p - sp);
                        break;
                    }
                }
            } else {
                long tmp = len;

                while (p < ep) {
                    sp = p;
                    r = asn1_parse2(bp, &p, tmp,
                        offset + (int)(p - *pp), depth + 1,
                        indent, dump);
                    if (r == 0)
                        goto end;
                    tmp -= (long)(p - sp);
                }
            }
        } else if (xclass != 0) {
            p += len;
            if (BIO_write(bp, "\n", 1) <= 0)
                goto end;
        } else {
            nl = 0;
            if ((tag == V_ASN1_PRINTABLESTRING) || (tag == V_ASN1_T61STRING) || (tag == V_ASN1_IA5STRING) || (tag == V_ASN1_VISIBLESTRING) || (tag == V_ASN1_NUMERICSTRING) || (tag == V_ASN1_UTF8STRING) || (tag == V_ASN1_UTCTIME) || (tag == V_ASN1_GENERALIZEDTIME)) {
                if (BIO_write(bp, ":", 1) <= 0)
                    goto end;
                if ((len > 0) && BIO_write(bp, (const char *)p, (int)len) != (int)len)
                    goto end;
            } else if (tag == V_ASN1_OBJECT) {
                opp = op;
                if (d2i_ASN1_OBJECT(&o, &opp, len + hl) != NULL) {
                    if (BIO_write(bp, ":", 1) <= 0)
                        goto end;
                    i2a_ASN1_OBJECT(bp, o);
                } else {
                    if (BIO_puts(bp, ":BAD OBJECT") <= 0)
                        goto end;
                    dump_cont = 1;
                }
            } else if (tag == V_ASN1_BOOLEAN) {
                if (len != 1) {
                    if (BIO_puts(bp, ":BAD BOOLEAN") <= 0)
                        goto end;
                    dump_cont = 1;
                }
                if (len > 0)
                    BIO_printf(bp, ":%u", p[0]);
            } else if (tag == V_ASN1_BMPSTRING) {
                /* do the BMP thang */
            } else if (tag == V_ASN1_OCTET_STRING) {
                int i, printable = 1;

                opp = op;
                os = d2i_ASN1_OCTET_STRING(NULL, &opp, len + hl);
                if (os != NULL && os->length > 0) {
                    opp = os->data;
                    /*
                     * testing whether the octet string is printable
                     */
                    for (i = 0; i < os->length; i++) {
                        if (((opp[i] < ' ') && (opp[i] != '\n') && (opp[i] != '\r') && (opp[i] != '\t')) || (opp[i] > '~')) {
                            printable = 0;
                            break;
                        }
                    }
                    if (printable)
                    /* printable string */
                    {
                        if (BIO_write(bp, ":", 1) <= 0)
                            goto end;
                        if (BIO_write(bp, (const char *)opp, os->length) <= 0)
                            goto end;
                    } else if (!dump)
                    /*
                     * not printable => print octet string as hex dump
                     */
                    {
                        if (BIO_write(bp, "[HEX DUMP]:", 11) <= 0)
                            goto end;
                        for (i = 0; i < os->length; i++) {
                            if (BIO_printf(bp, "%02X", opp[i]) <= 0)
                                goto end;
                        }
                    } else
                    /* print the normal dump */
                    {
                        if (!nl) {
                            if (BIO_write(bp, "\n", 1) <= 0)
                                goto end;
                        }
                        if (BIO_dump_indent(bp,
                                (const char *)opp,
                                ((dump == -1 || dump > os->length) ? os->length : dump),
                                dump_indent)
                            <= 0)
                            goto end;
                        nl = 1;
                    }
                }
                ASN1_OCTET_STRING_free(os);
                os = NULL;
            } else if (tag == V_ASN1_INTEGER) {
                int i;

                opp = op;
                ai = d2i_ASN1_INTEGER(NULL, &opp, len + hl);
                if (ai != NULL) {
                    if (BIO_write(bp, ":", 1) <= 0)
                        goto end;
                    if (ai->type == V_ASN1_NEG_INTEGER)
                        if (BIO_write(bp, "-", 1) <= 0)
                            goto end;
                    for (i = 0; i < ai->length; i++) {
                        if (BIO_printf(bp, "%02X", ai->data[i]) <= 0)
                            goto end;
                    }
                    if (ai->length == 0) {
                        if (BIO_write(bp, "00", 2) <= 0)
                            goto end;
                    }
                } else {
                    if (BIO_puts(bp, ":BAD INTEGER") <= 0)
                        goto end;
                    dump_cont = 1;
                }
                ASN1_INTEGER_free(ai);
                ai = NULL;
            } else if (tag == V_ASN1_ENUMERATED) {
                int i;

                opp = op;
                ae = d2i_ASN1_ENUMERATED(NULL, &opp, len + hl);
                if (ae != NULL) {
                    if (BIO_write(bp, ":", 1) <= 0)
                        goto end;
                    if (ae->type == V_ASN1_NEG_ENUMERATED)
                        if (BIO_write(bp, "-", 1) <= 0)
                            goto end;
                    for (i = 0; i < ae->length; i++) {
                        if (BIO_printf(bp, "%02X", ae->data[i]) <= 0)
                            goto end;
                    }
                    if (ae->length == 0) {
                        if (BIO_write(bp, "00", 2) <= 0)
                            goto end;
                    }
                } else {
                    if (BIO_puts(bp, ":BAD ENUMERATED") <= 0)
                        goto end;
                    dump_cont = 1;
                }
                ASN1_ENUMERATED_free(ae);
                ae = NULL;
            } else if (len > 0 && dump) {
                if (!nl) {
                    if (BIO_write(bp, "\n", 1) <= 0)
                        goto end;
                }
                if (BIO_dump_indent(bp, (const char *)p,
                        ((dump == -1 || dump > len) ? len : dump),
                        dump_indent)
                    <= 0)
                    goto end;
                nl = 1;
            }
            if (dump_cont) {
                int i;
                const unsigned char *tmp = op + hl;
                if (BIO_puts(bp, ":[") <= 0)
                    goto end;
                for (i = 0; i < len; i++) {
                    if (BIO_printf(bp, "%02X", tmp[i]) <= 0)
                        goto end;
                }
                if (BIO_puts(bp, "]") <= 0)
                    goto end;
                dump_cont = 0;
            }

            if (!nl) {
                if (BIO_write(bp, "\n", 1) <= 0)
                    goto end;
            }
            p += len;
            if ((tag == V_ASN1_EOC) && (xclass == 0)) {
                ret = 2; /* End of sequence */
                goto end;
            }
        }
        length -= len;
    }
    ret = 1;
end:
    ASN1_OBJECT_free(o);
    ASN1_OCTET_STRING_free(os);
    ASN1_INTEGER_free(ai);
    ASN1_ENUMERATED_free(ae);
    *pp = p;
    return ret;
}

const char *ASN1_tag2str(int tag)
{
    static const char *const tag2str[] = {
        /* 0-4 */
        "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING",
        /* 5-9 */
        "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL",
        /* 10-13 */
        "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>",
        /* 14-17 */
        "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET",
        /* 18-20 */
        "NUMERICSTRING", "PRINTABLESTRING", "T61STRING",
        /* 21-24 */
        "VIDEOTEXSTRING", "IA5STRING", "UTCTIME", "GENERALIZEDTIME",
        /* 25-27 */
        "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING",
        /* 28-30 */
        "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING"
    };

    if ((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
        tag &= ~0x100;

    if (tag < 0 || tag > 30)
        return "(unknown)";
    return tag2str[tag];
}

Coverage Report

Created: 2025-12-10 06:24

Line	Count	Source
1		/*
2		* Copyright 1995-2025 The OpenSSL Project Authors. All Rights Reserved.
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 <stdio.h>
11		#include "internal/cryptlib.h"
12		#include <openssl/buffer.h>
13		#include <openssl/objects.h>
14		#include <openssl/asn1.h>
15
16		#ifndef ASN1_PARSE_MAXDEPTH
17	0	#define ASN1_PARSE_MAXDEPTH 128
18		#endif
19
20		static int asn1_parse2(BIO bp, const unsigned char *pp, long length,
21		int offset, int depth, int indent, int dump);
22		static int asn1_print_info(BIO *bp, long offset, int depth, int hl, long len,
23		int tag, int xclass, int constructed, int indent)
24	0	{
25	0	char str[128];
26	0	const char *p;
27	0	int pop_f_prefix = 0;
28	0	long saved_indent = -1;
29	0	int i = 0;
30	0	BIO *bio = NULL;
31
32	0	if (constructed & V_ASN1_CONSTRUCTED)
33	0	p = "cons: ";
34	0	else
35	0	p = "prim: ";
36	0	if (constructed != (V_ASN1_CONSTRUCTED \| 1)) {
37	0	if (BIO_snprintf(str, sizeof(str), "%5ld:d=%-2d hl=%ld l=%4ld %s",
38	0	offset, depth, (long)hl, len, p)
39	0	<= 0)
40	0	goto err;
41	0	} else {
42	0	if (BIO_snprintf(str, sizeof(str), "%5ld:d=%-2d hl=%ld l=inf %s",
43	0	offset, depth, (long)hl, p)
44	0	<= 0)
45	0	goto err;
46	0	}
47	0	if (bp != NULL) {
48	0	if (BIO_set_prefix(bp, str) <= 0) {
49	0	if ((bio = BIO_new(BIO_f_prefix())) == NULL
50	0	\|\| (bp = BIO_push(bio, bp)) == NULL)
51	0	goto err;
52	0	pop_f_prefix = 1;
53	0	}
54	0	saved_indent = BIO_get_indent(bp);
55	0	if (BIO_set_prefix(bp, str) <= 0 \|\| BIO_set_indent(bp, indent) <= 0)
56	0	goto err;
57	0	}
58
59		/*
60		* BIO_set_prefix made a copy of \|str\|, so we can safely use it for
61		* something else, ASN.1 tag printout.
62		*/
63	0	p = str;
64	0	if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
65	0	BIO_snprintf(str, sizeof(str), "priv [ %d ] ", tag);
66	0	else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
67	0	BIO_snprintf(str, sizeof(str), "cont [ %d ]", tag);
68	0	else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
69	0	BIO_snprintf(str, sizeof(str), "appl [ %d ]", tag);
70	0	else if (tag > 30)
71	0	BIO_snprintf(str, sizeof(str), "<ASN1 %d>", tag);
72	0	else
73	0	p = ASN1_tag2str(tag);
74
75	0	i = (BIO_printf(bp, "%-18s", p) > 0);
76	0	err:
77	0	if (saved_indent >= 0)
78	0	BIO_set_indent(bp, saved_indent);
79	0	if (pop_f_prefix)
80	0	BIO_pop(bp);
81	0	BIO_free(bio);
82	0	return i;
83	0	}
84
85		int ASN1_parse(BIO bp, const unsigned char pp, long len, int indent)
86	0	{
87	0	return asn1_parse2(bp, &pp, len, 0, 0, indent, 0);
88	0	}
89
90		int ASN1_parse_dump(BIO bp, const unsigned char pp, long len, int indent,
91		int dump)
92	0	{
93	0	return asn1_parse2(bp, &pp, len, 0, 0, indent, dump);
94	0	}
95
96		static int asn1_parse2(BIO bp, const unsigned char *pp, long length,
97		int offset, int depth, int indent, int dump)
98	0	{
99	0	const unsigned char p, ep, tot, op, *opp;
100	0	long len;
101	0	int tag, xclass, ret = 0;
102	0	int nl, hl, j, r;
103	0	ASN1_OBJECT *o = NULL;
104	0	ASN1_OCTET_STRING *os = NULL;
105	0	ASN1_INTEGER *ai = NULL;
106	0	ASN1_ENUMERATED *ae = NULL;
107		/* ASN1_BMPSTRING bmp=NULL; /
108	0	int dump_indent, dump_cont = 0;
109
110	0	if (depth > ASN1_PARSE_MAXDEPTH) {
111	0	BIO_puts(bp, "BAD RECURSION DEPTH\n");
112	0	return 0;
113	0	}
114
115	0	dump_indent = 6; /* Because we know BIO_dump_indent() */
116	0	p = *pp;
117	0	tot = p + length;
118	0	while (length > 0) {
119	0	op = p;
120	0	j = ASN1_get_object(&p, &len, &tag, &xclass, length);
121	0	if (j & 0x80) {
122	0	BIO_puts(bp, "Error in encoding\n");
123	0	goto end;
124	0	}
125	0	hl = (int)(p - op);
126	0	length -= hl;
127		/*
128		* if j == 0x21 it is a constructed indefinite length object
129		*/
130	0	if (!asn1_print_info(bp, (long)offset + (long)(op - *pp), depth,
131	0	hl, len, tag, xclass, j, (indent) ? depth : 0))
132	0	goto end;
133	0	if (j & V_ASN1_CONSTRUCTED) {
134	0	const unsigned char *sp = p;
135
136	0	ep = p + len;
137	0	if (BIO_write(bp, "\n", 1) <= 0)
138	0	goto end;
139	0	if (len > length) {
140	0	BIO_printf(bp, "length is greater than %ld\n", length);
141	0	goto end;
142	0	}
143	0	if ((j == 0x21) && (len == 0)) {
144	0	for (;;) {
145	0	r = asn1_parse2(bp, &p, (long)(tot - p),
146	0	offset + (int)(p - *pp), depth + 1,
147	0	indent, dump);
148	0	if (r == 0)
149	0	goto end;
150	0	if ((r == 2) \|\| (p >= tot)) {
151	0	len = (long)(p - sp);
152	0	break;
153	0	}
154	0	}
155	0	} else {
156	0	long tmp = len;
157
158	0	while (p < ep) {
159	0	sp = p;
160	0	r = asn1_parse2(bp, &p, tmp,
161	0	offset + (int)(p - *pp), depth + 1,
162	0	indent, dump);
163	0	if (r == 0)
164	0	goto end;
165	0	tmp -= (long)(p - sp);
166	0	}
167	0	}
168	0	} else if (xclass != 0) {
169	0	p += len;
170	0	if (BIO_write(bp, "\n", 1) <= 0)
171	0	goto end;
172	0	} else {
173	0	nl = 0;
174	0	if ((tag == V_ASN1_PRINTABLESTRING) \|\| (tag == V_ASN1_T61STRING) \|\| (tag == V_ASN1_IA5STRING) \|\| (tag == V_ASN1_VISIBLESTRING) \|\| (tag == V_ASN1_NUMERICSTRING) \|\| (tag == V_ASN1_UTF8STRING) \|\| (tag == V_ASN1_UTCTIME) \|\| (tag == V_ASN1_GENERALIZEDTIME)) {
175	0	if (BIO_write(bp, ":", 1) <= 0)
176	0	goto end;
177	0	if ((len > 0) && BIO_write(bp, (const char *)p, (int)len) != (int)len)
178	0	goto end;
179	0	} else if (tag == V_ASN1_OBJECT) {
180	0	opp = op;
181	0	if (d2i_ASN1_OBJECT(&o, &opp, len + hl) != NULL) {
182	0	if (BIO_write(bp, ":", 1) <= 0)
183	0	goto end;
184	0	i2a_ASN1_OBJECT(bp, o);
185	0	} else {
186	0	if (BIO_puts(bp, ":BAD OBJECT") <= 0)
187	0	goto end;
188	0	dump_cont = 1;
189	0	}
190	0	} else if (tag == V_ASN1_BOOLEAN) {
191	0	if (len != 1) {
192	0	if (BIO_puts(bp, ":BAD BOOLEAN") <= 0)
193	0	goto end;
194	0	dump_cont = 1;
195	0	}
196	0	if (len > 0)
197	0	BIO_printf(bp, ":%u", p[0]);
198	0	} else if (tag == V_ASN1_BMPSTRING) {
199		/* do the BMP thang */
200	0	} else if (tag == V_ASN1_OCTET_STRING) {
201	0	int i, printable = 1;
202
203	0	opp = op;
204	0	os = d2i_ASN1_OCTET_STRING(NULL, &opp, len + hl);
205	0	if (os != NULL && os->length > 0) {
206	0	opp = os->data;
207		/*
208		* testing whether the octet string is printable
209		*/
210	0	for (i = 0; i < os->length; i++) {
211	0	if (((opp[i] < ' ') && (opp[i] != '\n') && (opp[i] != '\r') && (opp[i] != '\t')) \|\| (opp[i] > '~')) {
212	0	printable = 0;
213	0	break;
214	0	}
215	0	}
216	0	if (printable)
217		/* printable string */
218	0	{
219	0	if (BIO_write(bp, ":", 1) <= 0)
220	0	goto end;
221	0	if (BIO_write(bp, (const char *)opp, os->length) <= 0)
222	0	goto end;
223	0	} else if (!dump)
224		/*
225		* not printable => print octet string as hex dump
226		*/
227	0	{
228	0	if (BIO_write(bp, "[HEX DUMP]:", 11) <= 0)
229	0	goto end;
230	0	for (i = 0; i < os->length; i++) {
231	0	if (BIO_printf(bp, "%02X", opp[i]) <= 0)
232	0	goto end;
233	0	}
234	0	} else
235		/* print the normal dump */
236	0	{
237	0	if (!nl) {
238	0	if (BIO_write(bp, "\n", 1) <= 0)
239	0	goto end;
240	0	}
241	0	if (BIO_dump_indent(bp,
242	0	(const char *)opp,
243	0	((dump == -1 \|\| dump > os->length) ? os->length : dump),
244	0	dump_indent)
245	0	<= 0)
246	0	goto end;
247	0	nl = 1;
248	0	}
249	0	}
250	0	ASN1_OCTET_STRING_free(os);
251	0	os = NULL;
252	0	} else if (tag == V_ASN1_INTEGER) {
253	0	int i;
254
255	0	opp = op;
256	0	ai = d2i_ASN1_INTEGER(NULL, &opp, len + hl);
257	0	if (ai != NULL) {
258	0	if (BIO_write(bp, ":", 1) <= 0)
259	0	goto end;
260	0	if (ai->type == V_ASN1_NEG_INTEGER)
261	0	if (BIO_write(bp, "-", 1) <= 0)
262	0	goto end;
263	0	for (i = 0; i < ai->length; i++) {
264	0	if (BIO_printf(bp, "%02X", ai->data[i]) <= 0)
265	0	goto end;
266	0	}
267	0	if (ai->length == 0) {
268	0	if (BIO_write(bp, "00", 2) <= 0)
269	0	goto end;
270	0	}
271	0	} else {
272	0	if (BIO_puts(bp, ":BAD INTEGER") <= 0)
273	0	goto end;
274	0	dump_cont = 1;
275	0	}
276	0	ASN1_INTEGER_free(ai);
277	0	ai = NULL;
278	0	} else if (tag == V_ASN1_ENUMERATED) {
279	0	int i;
280
281	0	opp = op;
282	0	ae = d2i_ASN1_ENUMERATED(NULL, &opp, len + hl);
283	0	if (ae != NULL) {
284	0	if (BIO_write(bp, ":", 1) <= 0)
285	0	goto end;
286	0	if (ae->type == V_ASN1_NEG_ENUMERATED)
287	0	if (BIO_write(bp, "-", 1) <= 0)
288	0	goto end;
289	0	for (i = 0; i < ae->length; i++) {
290	0	if (BIO_printf(bp, "%02X", ae->data[i]) <= 0)
291	0	goto end;
292	0	}
293	0	if (ae->length == 0) {
294	0	if (BIO_write(bp, "00", 2) <= 0)
295	0	goto end;
296	0	}
297	0	} else {
298	0	if (BIO_puts(bp, ":BAD ENUMERATED") <= 0)
299	0	goto end;
300	0	dump_cont = 1;
301	0	}
302	0	ASN1_ENUMERATED_free(ae);
303	0	ae = NULL;
304	0	} else if (len > 0 && dump) {
305	0	if (!nl) {
306	0	if (BIO_write(bp, "\n", 1) <= 0)
307	0	goto end;
308	0	}
309	0	if (BIO_dump_indent(bp, (const char *)p,
310	0	((dump == -1 \|\| dump > len) ? len : dump),
311	0	dump_indent)
312	0	<= 0)
313	0	goto end;
314	0	nl = 1;
315	0	}
316	0	if (dump_cont) {
317	0	int i;
318	0	const unsigned char *tmp = op + hl;
319	0	if (BIO_puts(bp, ":[") <= 0)
320	0	goto end;
321	0	for (i = 0; i < len; i++) {
322	0	if (BIO_printf(bp, "%02X", tmp[i]) <= 0)
323	0	goto end;
324	0	}
325	0	if (BIO_puts(bp, "]") <= 0)
326	0	goto end;
327	0	dump_cont = 0;
328	0	}
329
330	0	if (!nl) {
331	0	if (BIO_write(bp, "\n", 1) <= 0)
332	0	goto end;
333	0	}
334	0	p += len;
335	0	if ((tag == V_ASN1_EOC) && (xclass == 0)) {
336	0	ret = 2; /* End of sequence */
337	0	goto end;
338	0	}
339	0	}
340	0	length -= len;
341	0	}
342	0	ret = 1;
343	0	end:
344	0	ASN1_OBJECT_free(o);
345	0	ASN1_OCTET_STRING_free(os);
346	0	ASN1_INTEGER_free(ai);
347	0	ASN1_ENUMERATED_free(ae);
348	0	*pp = p;
349	0	return ret;
350	0	}
351
352		const char *ASN1_tag2str(int tag)
353	0	{
354	0	static const char *const tag2str[] = {
355		/* 0-4 */
356	0	"EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING",
357		/* 5-9 */
358	0	"NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL",
359		/* 10-13 */
360	0	"ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>",
361		/* 14-17 */
362	0	"<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET",
363		/* 18-20 */
364	0	"NUMERICSTRING", "PRINTABLESTRING", "T61STRING",
365		/* 21-24 */
366	0	"VIDEOTEXSTRING", "IA5STRING", "UTCTIME", "GENERALIZEDTIME",
367		/* 25-27 */
368	0	"GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING",
369		/* 28-30 */
370	0	"UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING"
371	0	};
372
373	0	if ((tag == V_ASN1_NEG_INTEGER) \|\| (tag == V_ASN1_NEG_ENUMERATED))
374	0	tag &= ~0x100;
375
376	0	if (tag < 0 \|\| tag > 30)
377	0	return "(unknown)";
378	0	return tag2str[tag];
379	0	}