[331] | 1 | /*
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| 2 | * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stddef.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #include <openssl/asn1.h>
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| 13 | #include <openssl/asn1t.h>
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| 14 | #include <openssl/objects.h>
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| 15 | #include <openssl/buffer.h>
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| 16 | #include <openssl/err.h>
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| 17 | #include <openssl/x509v3.h>
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| 18 | #include "internal/asn1_int.h"
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| 19 | #include "asn1_locl.h"
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| 20 |
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| 21 | /*
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| 22 | * Print routines.
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| 23 | */
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| 24 |
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| 25 | /* ASN1_PCTX routines */
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| 26 |
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| 27 | static ASN1_PCTX default_pctx = {
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| 28 | ASN1_PCTX_FLAGS_SHOW_ABSENT, /* flags */
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| 29 | 0, /* nm_flags */
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| 30 | 0, /* cert_flags */
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| 31 | 0, /* oid_flags */
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| 32 | 0 /* str_flags */
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| 33 | };
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| 34 |
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| 35 | ASN1_PCTX *ASN1_PCTX_new(void)
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| 36 | {
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| 37 | ASN1_PCTX *ret;
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| 38 |
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| 39 | ret = OPENSSL_zalloc(sizeof(*ret));
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| 40 | if (ret == NULL) {
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| 41 | ASN1err(ASN1_F_ASN1_PCTX_NEW, ERR_R_MALLOC_FAILURE);
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| 42 | return NULL;
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| 43 | }
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| 44 | return ret;
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| 45 | }
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| 46 |
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| 47 | void ASN1_PCTX_free(ASN1_PCTX *p)
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| 48 | {
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| 49 | OPENSSL_free(p);
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| 50 | }
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| 51 |
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| 52 | unsigned long ASN1_PCTX_get_flags(const ASN1_PCTX *p)
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| 53 | {
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| 54 | return p->flags;
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| 55 | }
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| 56 |
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| 57 | void ASN1_PCTX_set_flags(ASN1_PCTX *p, unsigned long flags)
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| 58 | {
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| 59 | p->flags = flags;
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| 60 | }
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| 61 |
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| 62 | unsigned long ASN1_PCTX_get_nm_flags(const ASN1_PCTX *p)
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| 63 | {
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| 64 | return p->nm_flags;
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| 65 | }
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| 66 |
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| 67 | void ASN1_PCTX_set_nm_flags(ASN1_PCTX *p, unsigned long flags)
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| 68 | {
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| 69 | p->nm_flags = flags;
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| 70 | }
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| 71 |
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| 72 | unsigned long ASN1_PCTX_get_cert_flags(const ASN1_PCTX *p)
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| 73 | {
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| 74 | return p->cert_flags;
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| 75 | }
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| 76 |
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| 77 | void ASN1_PCTX_set_cert_flags(ASN1_PCTX *p, unsigned long flags)
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| 78 | {
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| 79 | p->cert_flags = flags;
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| 80 | }
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| 81 |
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| 82 | unsigned long ASN1_PCTX_get_oid_flags(const ASN1_PCTX *p)
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| 83 | {
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| 84 | return p->oid_flags;
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| 85 | }
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| 86 |
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| 87 | void ASN1_PCTX_set_oid_flags(ASN1_PCTX *p, unsigned long flags)
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| 88 | {
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| 89 | p->oid_flags = flags;
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| 90 | }
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| 91 |
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| 92 | unsigned long ASN1_PCTX_get_str_flags(const ASN1_PCTX *p)
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| 93 | {
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| 94 | return p->str_flags;
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| 95 | }
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| 96 |
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| 97 | void ASN1_PCTX_set_str_flags(ASN1_PCTX *p, unsigned long flags)
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| 98 | {
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| 99 | p->str_flags = flags;
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| 100 | }
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| 101 |
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| 102 | /* Main print routines */
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| 103 |
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| 104 | static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
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| 105 | const ASN1_ITEM *it,
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| 106 | const char *fname, const char *sname,
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| 107 | int nohdr, const ASN1_PCTX *pctx);
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| 108 |
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| 109 | static int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
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| 110 | const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx);
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| 111 |
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| 112 | static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,
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| 113 | const ASN1_ITEM *it, int indent,
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| 114 | const char *fname, const char *sname,
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| 115 | const ASN1_PCTX *pctx);
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| 116 |
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| 117 | static int asn1_print_fsname(BIO *out, int indent,
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| 118 | const char *fname, const char *sname,
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| 119 | const ASN1_PCTX *pctx);
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| 120 |
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| 121 | int ASN1_item_print(BIO *out, ASN1_VALUE *ifld, int indent,
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| 122 | const ASN1_ITEM *it, const ASN1_PCTX *pctx)
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| 123 | {
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| 124 | const char *sname;
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| 125 | if (pctx == NULL)
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| 126 | pctx = &default_pctx;
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| 127 | if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
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| 128 | sname = NULL;
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| 129 | else
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| 130 | sname = it->sname;
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| 131 | return asn1_item_print_ctx(out, &ifld, indent, it, NULL, sname, 0, pctx);
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| 132 | }
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| 133 |
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| 134 | static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
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| 135 | const ASN1_ITEM *it,
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| 136 | const char *fname, const char *sname,
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| 137 | int nohdr, const ASN1_PCTX *pctx)
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| 138 | {
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| 139 | const ASN1_TEMPLATE *tt;
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| 140 | const ASN1_EXTERN_FUNCS *ef;
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| 141 | ASN1_VALUE **tmpfld;
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| 142 | const ASN1_AUX *aux = it->funcs;
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| 143 | ASN1_aux_cb *asn1_cb;
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| 144 | ASN1_PRINT_ARG parg;
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| 145 | int i;
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| 146 | if (aux && aux->asn1_cb) {
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| 147 | parg.out = out;
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| 148 | parg.indent = indent;
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| 149 | parg.pctx = pctx;
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| 150 | asn1_cb = aux->asn1_cb;
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| 151 | } else
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| 152 | asn1_cb = 0;
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| 153 |
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| 154 | if (((it->itype != ASN1_ITYPE_PRIMITIVE)
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| 155 | || (it->utype != V_ASN1_BOOLEAN)) && *fld == NULL) {
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| 156 | if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_ABSENT) {
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| 157 | if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
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| 158 | return 0;
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| 159 | if (BIO_puts(out, "<ABSENT>\n") <= 0)
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| 160 | return 0;
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| 161 | }
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| 162 | return 1;
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| 163 | }
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| 164 |
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| 165 | switch (it->itype) {
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| 166 | case ASN1_ITYPE_PRIMITIVE:
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| 167 | if (it->templates) {
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| 168 | if (!asn1_template_print_ctx(out, fld, indent,
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| 169 | it->templates, pctx))
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| 170 | return 0;
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| 171 | break;
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| 172 | }
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| 173 | /* fall through */
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| 174 | case ASN1_ITYPE_MSTRING:
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| 175 | if (!asn1_primitive_print(out, fld, it, indent, fname, sname, pctx))
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| 176 | return 0;
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| 177 | break;
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| 178 |
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| 179 | case ASN1_ITYPE_EXTERN:
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| 180 | if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
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| 181 | return 0;
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| 182 | /* Use new style print routine if possible */
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| 183 | ef = it->funcs;
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| 184 | if (ef && ef->asn1_ex_print) {
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| 185 | i = ef->asn1_ex_print(out, fld, indent, "", pctx);
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| 186 | if (!i)
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| 187 | return 0;
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| 188 | if ((i == 2) && (BIO_puts(out, "\n") <= 0))
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| 189 | return 0;
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| 190 | return 1;
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| 191 | } else if (sname &&
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| 192 | BIO_printf(out, ":EXTERNAL TYPE %s\n", sname) <= 0)
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| 193 | return 0;
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| 194 | break;
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| 195 |
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| 196 | case ASN1_ITYPE_CHOICE:
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| 197 | /* CHOICE type, get selector */
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| 198 | i = asn1_get_choice_selector(fld, it);
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| 199 | /* This should never happen... */
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| 200 | if ((i < 0) || (i >= it->tcount)) {
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| 201 | if (BIO_printf(out, "ERROR: selector [%d] invalid\n", i) <= 0)
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| 202 | return 0;
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| 203 | return 1;
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| 204 | }
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| 205 | tt = it->templates + i;
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| 206 | tmpfld = asn1_get_field_ptr(fld, tt);
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| 207 | if (!asn1_template_print_ctx(out, tmpfld, indent, tt, pctx))
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| 208 | return 0;
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| 209 | break;
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| 210 |
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| 211 | case ASN1_ITYPE_SEQUENCE:
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| 212 | case ASN1_ITYPE_NDEF_SEQUENCE:
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| 213 | if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
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| 214 | return 0;
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| 215 | if (fname || sname) {
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| 216 | if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) {
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| 217 | if (BIO_puts(out, " {\n") <= 0)
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| 218 | return 0;
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| 219 | } else {
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| 220 | if (BIO_puts(out, "\n") <= 0)
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| 221 | return 0;
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| 222 | }
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| 223 | }
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| 224 |
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| 225 | if (asn1_cb) {
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| 226 | i = asn1_cb(ASN1_OP_PRINT_PRE, fld, it, &parg);
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| 227 | if (i == 0)
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| 228 | return 0;
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| 229 | if (i == 2)
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| 230 | return 1;
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| 231 | }
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| 232 |
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| 233 | /* Print each field entry */
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| 234 | for (i = 0, tt = it->templates; i < it->tcount; i++, tt++) {
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| 235 | const ASN1_TEMPLATE *seqtt;
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| 236 | seqtt = asn1_do_adb(fld, tt, 1);
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| 237 | if (!seqtt)
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| 238 | return 0;
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| 239 | tmpfld = asn1_get_field_ptr(fld, seqtt);
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| 240 | if (!asn1_template_print_ctx(out, tmpfld,
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| 241 | indent + 2, seqtt, pctx))
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| 242 | return 0;
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| 243 | }
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| 244 | if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) {
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| 245 | if (BIO_printf(out, "%*s}\n", indent, "") < 0)
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| 246 | return 0;
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| 247 | }
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| 248 |
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| 249 | if (asn1_cb) {
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| 250 | i = asn1_cb(ASN1_OP_PRINT_POST, fld, it, &parg);
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| 251 | if (i == 0)
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| 252 | return 0;
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| 253 | }
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| 254 | break;
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| 255 |
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| 256 | default:
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| 257 | BIO_printf(out, "Unprocessed type %d\n", it->itype);
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| 258 | return 0;
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| 259 | }
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| 260 |
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| 261 | return 1;
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| 262 | }
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| 263 |
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| 264 | static int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
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| 265 | const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx)
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| 266 | {
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| 267 | int i, flags;
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| 268 | const char *sname, *fname;
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| 269 | ASN1_VALUE *tfld;
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| 270 | flags = tt->flags;
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| 271 | if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME)
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| 272 | sname = ASN1_ITEM_ptr(tt->item)->sname;
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| 273 | else
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| 274 | sname = NULL;
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| 275 | if (pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
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| 276 | fname = NULL;
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| 277 | else
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| 278 | fname = tt->field_name;
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| 279 |
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| 280 | /*
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| 281 | * If field is embedded then fld needs fixing so it is a pointer to
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| 282 | * a pointer to a field.
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| 283 | */
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| 284 | if (flags & ASN1_TFLG_EMBED) {
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| 285 | tfld = (ASN1_VALUE *)fld;
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| 286 | fld = &tfld;
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| 287 | }
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| 288 |
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| 289 | if (flags & ASN1_TFLG_SK_MASK) {
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| 290 | char *tname;
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| 291 | ASN1_VALUE *skitem;
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| 292 | STACK_OF(ASN1_VALUE) *stack;
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| 293 |
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| 294 | /* SET OF, SEQUENCE OF */
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| 295 | if (fname) {
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| 296 | if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SSOF) {
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| 297 | if (flags & ASN1_TFLG_SET_OF)
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| 298 | tname = "SET";
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| 299 | else
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| 300 | tname = "SEQUENCE";
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| 301 | if (BIO_printf(out, "%*s%s OF %s {\n",
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| 302 | indent, "", tname, tt->field_name) <= 0)
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| 303 | return 0;
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| 304 | } else if (BIO_printf(out, "%*s%s:\n", indent, "", fname) <= 0)
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| 305 | return 0;
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| 306 | }
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| 307 | stack = (STACK_OF(ASN1_VALUE) *)*fld;
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| 308 | for (i = 0; i < sk_ASN1_VALUE_num(stack); i++) {
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| 309 | if ((i > 0) && (BIO_puts(out, "\n") <= 0))
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| 310 | return 0;
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| 311 |
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| 312 | skitem = sk_ASN1_VALUE_value(stack, i);
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| 313 | if (!asn1_item_print_ctx(out, &skitem, indent + 2,
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| 314 | ASN1_ITEM_ptr(tt->item), NULL, NULL, 1,
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| 315 | pctx))
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| 316 | return 0;
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| 317 | }
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| 318 | if (!i && BIO_printf(out, "%*s<EMPTY>\n", indent + 2, "") <= 0)
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| 319 | return 0;
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| 320 | if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) {
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| 321 | if (BIO_printf(out, "%*s}\n", indent, "") <= 0)
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| 322 | return 0;
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| 323 | }
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| 324 | return 1;
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| 325 | }
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| 326 | return asn1_item_print_ctx(out, fld, indent, ASN1_ITEM_ptr(tt->item),
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| 327 | fname, sname, 0, pctx);
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| 328 | }
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| 329 |
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| 330 | static int asn1_print_fsname(BIO *out, int indent,
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| 331 | const char *fname, const char *sname,
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| 332 | const ASN1_PCTX *pctx)
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| 333 | {
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| 334 | static const char spaces[] = " ";
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| 335 | static const int nspaces = sizeof(spaces) - 1;
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| 336 |
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| 337 | while (indent > nspaces) {
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| 338 | if (BIO_write(out, spaces, nspaces) != nspaces)
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| 339 | return 0;
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| 340 | indent -= nspaces;
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| 341 | }
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| 342 | if (BIO_write(out, spaces, indent) != indent)
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| 343 | return 0;
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| 344 | if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
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| 345 | sname = NULL;
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| 346 | if (pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
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| 347 | fname = NULL;
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| 348 | if (!sname && !fname)
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| 349 | return 1;
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| 350 | if (fname) {
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| 351 | if (BIO_puts(out, fname) <= 0)
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| 352 | return 0;
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| 353 | }
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| 354 | if (sname) {
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| 355 | if (fname) {
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| 356 | if (BIO_printf(out, " (%s)", sname) <= 0)
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| 357 | return 0;
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| 358 | } else {
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| 359 | if (BIO_puts(out, sname) <= 0)
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| 360 | return 0;
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| 361 | }
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| 362 | }
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| 363 | if (BIO_write(out, ": ", 2) != 2)
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| 364 | return 0;
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| 365 | return 1;
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| 366 | }
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| 367 |
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| 368 | static int asn1_print_boolean(BIO *out, int boolval)
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| 369 | {
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| 370 | const char *str;
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| 371 | switch (boolval) {
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| 372 | case -1:
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| 373 | str = "BOOL ABSENT";
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| 374 | break;
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| 375 |
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| 376 | case 0:
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| 377 | str = "FALSE";
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| 378 | break;
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| 379 |
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| 380 | default:
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| 381 | str = "TRUE";
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| 382 | break;
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| 383 |
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| 384 | }
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| 385 |
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| 386 | if (BIO_puts(out, str) <= 0)
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| 387 | return 0;
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| 388 | return 1;
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| 389 |
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| 390 | }
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| 391 |
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| 392 | static int asn1_print_integer(BIO *out, const ASN1_INTEGER *str)
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| 393 | {
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| 394 | char *s;
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| 395 | int ret = 1;
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| 396 | s = i2s_ASN1_INTEGER(NULL, str);
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| 397 | if (s == NULL)
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| 398 | return 0;
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| 399 | if (BIO_puts(out, s) <= 0)
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| 400 | ret = 0;
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| 401 | OPENSSL_free(s);
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| 402 | return ret;
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| 403 | }
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| 404 |
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| 405 | static int asn1_print_oid(BIO *out, const ASN1_OBJECT *oid)
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| 406 | {
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| 407 | char objbuf[80];
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| 408 | const char *ln;
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| 409 | ln = OBJ_nid2ln(OBJ_obj2nid(oid));
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| 410 | if (!ln)
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| 411 | ln = "";
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| 412 | OBJ_obj2txt(objbuf, sizeof objbuf, oid, 1);
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| 413 | if (BIO_printf(out, "%s (%s)", ln, objbuf) <= 0)
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| 414 | return 0;
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| 415 | return 1;
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| 416 | }
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| 417 |
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| 418 | static int asn1_print_obstring(BIO *out, const ASN1_STRING *str, int indent)
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| 419 | {
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| 420 | if (str->type == V_ASN1_BIT_STRING) {
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| 421 | if (BIO_printf(out, " (%ld unused bits)\n", str->flags & 0x7) <= 0)
|
---|
| 422 | return 0;
|
---|
| 423 | } else if (BIO_puts(out, "\n") <= 0)
|
---|
| 424 | return 0;
|
---|
| 425 | if ((str->length > 0)
|
---|
| 426 | && BIO_dump_indent(out, (const char *)str->data, str->length,
|
---|
| 427 | indent + 2) <= 0)
|
---|
| 428 | return 0;
|
---|
| 429 | return 1;
|
---|
| 430 | }
|
---|
| 431 |
|
---|
| 432 | static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,
|
---|
| 433 | const ASN1_ITEM *it, int indent,
|
---|
| 434 | const char *fname, const char *sname,
|
---|
| 435 | const ASN1_PCTX *pctx)
|
---|
| 436 | {
|
---|
| 437 | long utype;
|
---|
| 438 | ASN1_STRING *str;
|
---|
| 439 | int ret = 1, needlf = 1;
|
---|
| 440 | const char *pname;
|
---|
| 441 | const ASN1_PRIMITIVE_FUNCS *pf;
|
---|
| 442 | pf = it->funcs;
|
---|
| 443 | if (!asn1_print_fsname(out, indent, fname, sname, pctx))
|
---|
| 444 | return 0;
|
---|
| 445 | if (pf && pf->prim_print)
|
---|
| 446 | return pf->prim_print(out, fld, it, indent, pctx);
|
---|
| 447 | if (it->itype == ASN1_ITYPE_MSTRING) {
|
---|
| 448 | str = (ASN1_STRING *)*fld;
|
---|
| 449 | utype = str->type & ~V_ASN1_NEG;
|
---|
| 450 | } else {
|
---|
| 451 | utype = it->utype;
|
---|
| 452 | if (utype == V_ASN1_BOOLEAN)
|
---|
| 453 | str = NULL;
|
---|
| 454 | else
|
---|
| 455 | str = (ASN1_STRING *)*fld;
|
---|
| 456 | }
|
---|
| 457 | if (utype == V_ASN1_ANY) {
|
---|
| 458 | ASN1_TYPE *atype = (ASN1_TYPE *)*fld;
|
---|
| 459 | utype = atype->type;
|
---|
| 460 | fld = &atype->value.asn1_value;
|
---|
| 461 | str = (ASN1_STRING *)*fld;
|
---|
| 462 | if (pctx->flags & ASN1_PCTX_FLAGS_NO_ANY_TYPE)
|
---|
| 463 | pname = NULL;
|
---|
| 464 | else
|
---|
| 465 | pname = ASN1_tag2str(utype);
|
---|
| 466 | } else {
|
---|
| 467 | if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_TYPE)
|
---|
| 468 | pname = ASN1_tag2str(utype);
|
---|
| 469 | else
|
---|
| 470 | pname = NULL;
|
---|
| 471 | }
|
---|
| 472 |
|
---|
| 473 | if (utype == V_ASN1_NULL) {
|
---|
| 474 | if (BIO_puts(out, "NULL\n") <= 0)
|
---|
| 475 | return 0;
|
---|
| 476 | return 1;
|
---|
| 477 | }
|
---|
| 478 |
|
---|
| 479 | if (pname) {
|
---|
| 480 | if (BIO_puts(out, pname) <= 0)
|
---|
| 481 | return 0;
|
---|
| 482 | if (BIO_puts(out, ":") <= 0)
|
---|
| 483 | return 0;
|
---|
| 484 | }
|
---|
| 485 |
|
---|
| 486 | switch (utype) {
|
---|
| 487 | case V_ASN1_BOOLEAN:
|
---|
| 488 | {
|
---|
| 489 | int boolval = *(int *)fld;
|
---|
| 490 | if (boolval == -1)
|
---|
| 491 | boolval = it->size;
|
---|
| 492 | ret = asn1_print_boolean(out, boolval);
|
---|
| 493 | }
|
---|
| 494 | break;
|
---|
| 495 |
|
---|
| 496 | case V_ASN1_INTEGER:
|
---|
| 497 | case V_ASN1_ENUMERATED:
|
---|
| 498 | ret = asn1_print_integer(out, str);
|
---|
| 499 | break;
|
---|
| 500 |
|
---|
| 501 | case V_ASN1_UTCTIME:
|
---|
| 502 | ret = ASN1_UTCTIME_print(out, str);
|
---|
| 503 | break;
|
---|
| 504 |
|
---|
| 505 | case V_ASN1_GENERALIZEDTIME:
|
---|
| 506 | ret = ASN1_GENERALIZEDTIME_print(out, str);
|
---|
| 507 | break;
|
---|
| 508 |
|
---|
| 509 | case V_ASN1_OBJECT:
|
---|
| 510 | ret = asn1_print_oid(out, (const ASN1_OBJECT *)*fld);
|
---|
| 511 | break;
|
---|
| 512 |
|
---|
| 513 | case V_ASN1_OCTET_STRING:
|
---|
| 514 | case V_ASN1_BIT_STRING:
|
---|
| 515 | ret = asn1_print_obstring(out, str, indent);
|
---|
| 516 | needlf = 0;
|
---|
| 517 | break;
|
---|
| 518 |
|
---|
| 519 | case V_ASN1_SEQUENCE:
|
---|
| 520 | case V_ASN1_SET:
|
---|
| 521 | case V_ASN1_OTHER:
|
---|
| 522 | if (BIO_puts(out, "\n") <= 0)
|
---|
| 523 | return 0;
|
---|
| 524 | if (ASN1_parse_dump(out, str->data, str->length, indent, 0) <= 0)
|
---|
| 525 | ret = 0;
|
---|
| 526 | needlf = 0;
|
---|
| 527 | break;
|
---|
| 528 |
|
---|
| 529 | default:
|
---|
| 530 | ret = ASN1_STRING_print_ex(out, str, pctx->str_flags);
|
---|
| 531 |
|
---|
| 532 | }
|
---|
| 533 | if (!ret)
|
---|
| 534 | return 0;
|
---|
| 535 | if (needlf && BIO_puts(out, "\n") <= 0)
|
---|
| 536 | return 0;
|
---|
| 537 | return 1;
|
---|
| 538 | }
|
---|