mirror of
https://github.com/openssl/openssl.git
synced 2024-12-27 06:21:43 +08:00
388 lines
13 KiB
C
388 lines
13 KiB
C
/*
|
|
* Copyright 1995-2023 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 = (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 + (p - *pp), depth + 1,
|
|
indent, dump);
|
|
if (r == 0)
|
|
goto end;
|
|
if ((r == 2) || (p >= tot)) {
|
|
len = p - sp;
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
long tmp = len;
|
|
|
|
while (p < ep) {
|
|
sp = p;
|
|
r = asn1_parse2(bp, &p, tmp,
|
|
offset + (p - *pp), depth + 1,
|
|
indent, dump);
|
|
if (r == 0)
|
|
goto end;
|
|
tmp -= 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>",
|
|
/* 15-17 */
|
|
"<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];
|
|
}
|