/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

#include <crypto/asn1.h>

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: 2026-03-09 06:55

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		#include <crypto/asn1.h>
21
22		static int asn1_parse2(BIO bp, const unsigned char *pp, long length,
23		int offset, int depth, int indent, int dump);
24		static int asn1_print_info(BIO *bp, long offset, int depth, int hl, long len,
25		int tag, int xclass, int constructed, int indent)
26	0	{
27	0	char str[128];
28	0	const char *p;
29	0	int pop_f_prefix = 0;
30	0	long saved_indent = -1;
31	0	int i = 0;
32	0	BIO *bio = NULL;
33
34	0	if (constructed & V_ASN1_CONSTRUCTED)
35	0	p = "cons: ";
36	0	else
37	0	p = "prim: ";
38	0	if (constructed != (V_ASN1_CONSTRUCTED \| 1)) {
39	0	if (BIO_snprintf(str, sizeof(str), "%5ld:d=%-2d hl=%ld l=%4ld %s",
40	0	offset, depth, (long)hl, len, p)
41	0	<= 0)
42	0	goto err;
43	0	} else {
44	0	if (BIO_snprintf(str, sizeof(str), "%5ld:d=%-2d hl=%ld l=inf %s",
45	0	offset, depth, (long)hl, p)
46	0	<= 0)
47	0	goto err;
48	0	}
49	0	if (bp != NULL) {
50	0	if (BIO_set_prefix(bp, str) <= 0) {
51	0	if ((bio = BIO_new(BIO_f_prefix())) == NULL
52	0	\|\| (bp = BIO_push(bio, bp)) == NULL)
53	0	goto err;
54	0	pop_f_prefix = 1;
55	0	}
56	0	saved_indent = BIO_get_indent(bp);
57	0	if (BIO_set_prefix(bp, str) <= 0 \|\| BIO_set_indent(bp, indent) <= 0)
58	0	goto err;
59	0	}
60
61		/*
62		* BIO_set_prefix made a copy of \|str\|, so we can safely use it for
63		* something else, ASN.1 tag printout.
64		*/
65	0	p = str;
66	0	if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
67	0	BIO_snprintf(str, sizeof(str), "priv [ %d ] ", tag);
68	0	else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
69	0	BIO_snprintf(str, sizeof(str), "cont [ %d ]", tag);
70	0	else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
71	0	BIO_snprintf(str, sizeof(str), "appl [ %d ]", tag);
72	0	else if (tag > 30)
73	0	BIO_snprintf(str, sizeof(str), "<ASN1 %d>", tag);
74	0	else
75	0	p = ASN1_tag2str(tag);
76
77	0	i = (BIO_printf(bp, "%-18s", p) > 0);
78	0	err:
79	0	if (saved_indent >= 0)
80	0	BIO_set_indent(bp, saved_indent);
81	0	if (pop_f_prefix)
82	0	BIO_pop(bp);
83	0	BIO_free(bio);
84	0	return i;
85	0	}
86
87		int ASN1_parse(BIO bp, const unsigned char pp, long len, int indent)
88	0	{
89	0	return asn1_parse2(bp, &pp, len, 0, 0, indent, 0);
90	0	}
91
92		int ASN1_parse_dump(BIO bp, const unsigned char pp, long len, int indent,
93		int dump)
94	0	{
95	0	return asn1_parse2(bp, &pp, len, 0, 0, indent, dump);
96	0	}
97
98		static int asn1_parse2(BIO bp, const unsigned char *pp, long length,
99		int offset, int depth, int indent, int dump)
100	0	{
101	0	const unsigned char p, ep, tot, op, *opp;
102	0	long len;
103	0	int tag, xclass, ret = 0;
104	0	int nl, hl, j, r;
105	0	ASN1_OBJECT *o = NULL;
106	0	ASN1_OCTET_STRING *os = NULL;
107	0	ASN1_INTEGER *ai = NULL;
108	0	ASN1_ENUMERATED *ae = NULL;
109		/* ASN1_BMPSTRING bmp=NULL; /
110	0	int dump_indent, dump_cont = 0;
111
112	0	if (depth > ASN1_PARSE_MAXDEPTH) {
113	0	BIO_puts(bp, "BAD RECURSION DEPTH\n");
114	0	return 0;
115	0	}
116
117	0	dump_indent = 6; /* Because we know BIO_dump_indent() */
118	0	p = *pp;
119	0	tot = p + length;
120	0	while (length > 0) {
121	0	op = p;
122	0	j = ASN1_get_object(&p, &len, &tag, &xclass, length);
123	0	if (j & 0x80) {
124	0	BIO_puts(bp, "Error in encoding\n");
125	0	goto end;
126	0	}
127	0	hl = (int)(p - op);
128	0	length -= hl;
129		/*
130		* if j == 0x21 it is a constructed indefinite length object
131		*/
132	0	if (!asn1_print_info(bp, (long)offset + (long)(op - *pp), depth,
133	0	hl, len, tag, xclass, j, (indent) ? depth : 0))
134	0	goto end;
135	0	if (j & V_ASN1_CONSTRUCTED) {
136	0	const unsigned char *sp = p;
137
138	0	ep = p + len;
139	0	if (BIO_write(bp, "\n", 1) <= 0)
140	0	goto end;
141	0	if (len > length) {
142	0	BIO_printf(bp, "length is greater than %ld\n", length);
143	0	goto end;
144	0	}
145	0	if ((j == 0x21) && (len == 0)) {
146	0	for (;;) {
147	0	r = asn1_parse2(bp, &p, (long)(tot - p),
148	0	offset + (int)(p - *pp), depth + 1,
149	0	indent, dump);
150	0	if (r == 0)
151	0	goto end;
152	0	if ((r == 2) \|\| (p >= tot)) {
153	0	len = (long)(p - sp);
154	0	break;
155	0	}
156	0	}
157	0	} else {
158	0	long tmp = len;
159
160	0	while (p < ep) {
161	0	sp = p;
162	0	r = asn1_parse2(bp, &p, tmp,
163	0	offset + (int)(p - *pp), depth + 1,
164	0	indent, dump);
165	0	if (r == 0)
166	0	goto end;
167	0	tmp -= (long)(p - sp);
168	0	}
169	0	}
170	0	} else if (xclass != 0) {
171	0	p += len;
172	0	if (BIO_write(bp, "\n", 1) <= 0)
173	0	goto end;
174	0	} else {
175	0	nl = 0;
176	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)) {
177	0	if (BIO_write(bp, ":", 1) <= 0)
178	0	goto end;
179	0	if ((len > 0) && BIO_write(bp, (const char *)p, (int)len) != (int)len)
180	0	goto end;
181	0	} else if (tag == V_ASN1_OBJECT) {
182	0	opp = op;
183	0	if (d2i_ASN1_OBJECT(&o, &opp, len + hl) != NULL) {
184	0	if (BIO_write(bp, ":", 1) <= 0)
185	0	goto end;
186	0	i2a_ASN1_OBJECT(bp, o);
187	0	} else {
188	0	if (BIO_puts(bp, ":BAD OBJECT") <= 0)
189	0	goto end;
190	0	dump_cont = 1;
191	0	}
192	0	} else if (tag == V_ASN1_BOOLEAN) {
193	0	if (len != 1) {
194	0	if (BIO_puts(bp, ":BAD BOOLEAN") <= 0)
195	0	goto end;
196	0	dump_cont = 1;
197	0	}
198	0	if (len > 0)
199	0	BIO_printf(bp, ":%u", p[0]);
200	0	} else if (tag == V_ASN1_BMPSTRING) {
201		/* do the BMP thang */
202	0	} else if (tag == V_ASN1_OCTET_STRING) {
203	0	int i, printable = 1;
204
205	0	opp = op;
206	0	os = d2i_ASN1_OCTET_STRING(NULL, &opp, len + hl);
207	0	if (os != NULL && os->length > 0) {
208	0	opp = os->data;
209		/*
210		* testing whether the octet string is printable
211		*/
212	0	for (i = 0; i < os->length; i++) {
213	0	if (((opp[i] < ' ') && (opp[i] != '\n') && (opp[i] != '\r') && (opp[i] != '\t')) \|\| (opp[i] > '~')) {
214	0	printable = 0;
215	0	break;
216	0	}
217	0	}
218	0	if (printable)
219		/* printable string */
220	0	{
221	0	if (BIO_write(bp, ":", 1) <= 0)
222	0	goto end;
223	0	if (BIO_write(bp, (const char *)opp, os->length) <= 0)
224	0	goto end;
225	0	} else if (!dump)
226		/*
227		* not printable => print octet string as hex dump
228		*/
229	0	{
230	0	if (BIO_write(bp, "[HEX DUMP]:", 11) <= 0)
231	0	goto end;
232	0	for (i = 0; i < os->length; i++) {
233	0	if (BIO_printf(bp, "%02X", opp[i]) <= 0)
234	0	goto end;
235	0	}
236	0	} else
237		/* print the normal dump */
238	0	{
239	0	if (!nl) {
240	0	if (BIO_write(bp, "\n", 1) <= 0)
241	0	goto end;
242	0	}
243	0	if (BIO_dump_indent(bp,
244	0	(const char *)opp,
245	0	((dump == -1 \|\| dump > os->length) ? os->length : dump),
246	0	dump_indent)
247	0	<= 0)
248	0	goto end;
249	0	nl = 1;
250	0	}
251	0	}
252	0	ASN1_OCTET_STRING_free(os);
253	0	os = NULL;
254	0	} else if (tag == V_ASN1_INTEGER) {
255	0	int i;
256
257	0	opp = op;
258	0	ai = d2i_ASN1_INTEGER(NULL, &opp, len + hl);
259	0	if (ai != NULL) {
260	0	if (BIO_write(bp, ":", 1) <= 0)
261	0	goto end;
262	0	if (ai->type == V_ASN1_NEG_INTEGER)
263	0	if (BIO_write(bp, "-", 1) <= 0)
264	0	goto end;
265	0	for (i = 0; i < ai->length; i++) {
266	0	if (BIO_printf(bp, "%02X", ai->data[i]) <= 0)
267	0	goto end;
268	0	}
269	0	if (ai->length == 0) {
270	0	if (BIO_write(bp, "00", 2) <= 0)
271	0	goto end;
272	0	}
273	0	} else {
274	0	if (BIO_puts(bp, ":BAD INTEGER") <= 0)
275	0	goto end;
276	0	dump_cont = 1;
277	0	}
278	0	ASN1_INTEGER_free(ai);
279	0	ai = NULL;
280	0	} else if (tag == V_ASN1_ENUMERATED) {
281	0	int i;
282
283	0	opp = op;
284	0	ae = d2i_ASN1_ENUMERATED(NULL, &opp, len + hl);
285	0	if (ae != NULL) {
286	0	if (BIO_write(bp, ":", 1) <= 0)
287	0	goto end;
288	0	if (ae->type == V_ASN1_NEG_ENUMERATED)
289	0	if (BIO_write(bp, "-", 1) <= 0)
290	0	goto end;
291	0	for (i = 0; i < ae->length; i++) {
292	0	if (BIO_printf(bp, "%02X", ae->data[i]) <= 0)
293	0	goto end;
294	0	}
295	0	if (ae->length == 0) {
296	0	if (BIO_write(bp, "00", 2) <= 0)
297	0	goto end;
298	0	}
299	0	} else {
300	0	if (BIO_puts(bp, ":BAD ENUMERATED") <= 0)
301	0	goto end;
302	0	dump_cont = 1;
303	0	}
304	0	ASN1_ENUMERATED_free(ae);
305	0	ae = NULL;
306	0	} else if (len > 0 && dump) {
307	0	if (!nl) {
308	0	if (BIO_write(bp, "\n", 1) <= 0)
309	0	goto end;
310	0	}
311	0	if (BIO_dump_indent(bp, (const char *)p,
312	0	((dump == -1 \|\| dump > len) ? len : dump),
313	0	dump_indent)
314	0	<= 0)
315	0	goto end;
316	0	nl = 1;
317	0	}
318	0	if (dump_cont) {
319	0	int i;
320	0	const unsigned char *tmp = op + hl;
321	0	if (BIO_puts(bp, ":[") <= 0)
322	0	goto end;
323	0	for (i = 0; i < len; i++) {
324	0	if (BIO_printf(bp, "%02X", tmp[i]) <= 0)
325	0	goto end;
326	0	}
327	0	if (BIO_puts(bp, "]") <= 0)
328	0	goto end;
329	0	dump_cont = 0;
330	0	}
331
332	0	if (!nl) {
333	0	if (BIO_write(bp, "\n", 1) <= 0)
334	0	goto end;
335	0	}
336	0	p += len;
337	0	if ((tag == V_ASN1_EOC) && (xclass == 0)) {
338	0	ret = 2; /* End of sequence */
339	0	goto end;
340	0	}
341	0	}
342	0	length -= len;
343	0	}
344	0	ret = 1;
345	0	end:
346	0	ASN1_OBJECT_free(o);
347	0	ASN1_OCTET_STRING_free(os);
348	0	ASN1_INTEGER_free(ai);
349	0	ASN1_ENUMERATED_free(ae);
350	0	*pp = p;
351	0	return ret;
352	0	}
353
354		const char *ASN1_tag2str(int tag)
355	0	{
356	0	static const char *const tag2str[] = {
357		/* 0-4 */
358	0	"EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING",
359		/* 5-9 */
360	0	"NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL",
361		/* 10-13 */
362	0	"ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>",
363		/* 14-17 */
364	0	"<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET",
365		/* 18-20 */
366	0	"NUMERICSTRING", "PRINTABLESTRING", "T61STRING",
367		/* 21-24 */
368	0	"VIDEOTEXSTRING", "IA5STRING", "UTCTIME", "GENERALIZEDTIME",
369		/* 25-27 */
370	0	"GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING",
371		/* 28-30 */
372	0	"UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING"
373	0	};
374
375	0	if ((tag == V_ASN1_NEG_INTEGER) \|\| (tag == V_ASN1_NEG_ENUMERATED))
376	0	tag &= ~0x100;
377
378	0	if (tag < 0 \|\| tag > 30)
379	0	return "(unknown)";
380	0	return tag2str[tag];
381	0	}