mirror of
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9fdcc21fdc
Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/8029)
557 lines
16 KiB
C
557 lines
16 KiB
C
/*
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* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/ctype.h"
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#include "internal/cryptlib.h"
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#include <openssl/asn1t.h>
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#include <openssl/x509.h>
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#include "internal/x509_int.h"
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#include "internal/asn1_int.h"
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#include "x509_lcl.h"
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/*
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* Maximum length of X509_NAME: much larger than anything we should
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* ever see in practice.
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*/
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#define X509_NAME_MAX (1024 * 1024)
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static int x509_name_ex_d2i(ASN1_VALUE **val,
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const unsigned char **in, long len,
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const ASN1_ITEM *it,
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int tag, int aclass, char opt, ASN1_TLC *ctx);
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static int x509_name_ex_i2d(const ASN1_VALUE **val, unsigned char **out,
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const ASN1_ITEM *it, int tag, int aclass);
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static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it);
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static void x509_name_ex_free(ASN1_VALUE **val, const ASN1_ITEM *it);
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static int x509_name_encode(X509_NAME *a);
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static int x509_name_canon(X509_NAME *a);
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static int asn1_string_canon(ASN1_STRING *out, const ASN1_STRING *in);
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static int i2d_name_canon(const STACK_OF(STACK_OF_X509_NAME_ENTRY) * intname,
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unsigned char **in);
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static int x509_name_ex_print(BIO *out, const ASN1_VALUE **pval,
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int indent,
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const char *fname, const ASN1_PCTX *pctx);
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ASN1_SEQUENCE(X509_NAME_ENTRY) = {
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ASN1_SIMPLE(X509_NAME_ENTRY, object, ASN1_OBJECT),
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ASN1_SIMPLE(X509_NAME_ENTRY, value, ASN1_PRINTABLE)
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} ASN1_SEQUENCE_END(X509_NAME_ENTRY)
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IMPLEMENT_ASN1_FUNCTIONS(X509_NAME_ENTRY)
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IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME_ENTRY)
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/*
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* For the "Name" type we need a SEQUENCE OF { SET OF X509_NAME_ENTRY } so
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* declare two template wrappers for this
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*/
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ASN1_ITEM_TEMPLATE(X509_NAME_ENTRIES) =
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ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_OF, 0, RDNS, X509_NAME_ENTRY)
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static_ASN1_ITEM_TEMPLATE_END(X509_NAME_ENTRIES)
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ASN1_ITEM_TEMPLATE(X509_NAME_INTERNAL) =
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ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, Name, X509_NAME_ENTRIES)
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static_ASN1_ITEM_TEMPLATE_END(X509_NAME_INTERNAL)
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/*
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* Normally that's where it would end: we'd have two nested STACK structures
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* representing the ASN1. Unfortunately X509_NAME uses a completely different
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* form and caches encodings so we have to process the internal form and
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* convert to the external form.
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*/
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static const ASN1_EXTERN_FUNCS x509_name_ff = {
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NULL,
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x509_name_ex_new,
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x509_name_ex_free,
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0, /* Default clear behaviour is OK */
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x509_name_ex_d2i,
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x509_name_ex_i2d,
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x509_name_ex_print
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};
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IMPLEMENT_EXTERN_ASN1(X509_NAME, V_ASN1_SEQUENCE, x509_name_ff)
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IMPLEMENT_ASN1_FUNCTIONS(X509_NAME)
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IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME)
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static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it)
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{
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X509_NAME *ret = OPENSSL_zalloc(sizeof(*ret));
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if (ret == NULL)
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goto memerr;
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if ((ret->entries = sk_X509_NAME_ENTRY_new_null()) == NULL)
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goto memerr;
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if ((ret->bytes = BUF_MEM_new()) == NULL)
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goto memerr;
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ret->modified = 1;
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*val = (ASN1_VALUE *)ret;
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return 1;
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memerr:
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ASN1err(ASN1_F_X509_NAME_EX_NEW, ERR_R_MALLOC_FAILURE);
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if (ret) {
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sk_X509_NAME_ENTRY_free(ret->entries);
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OPENSSL_free(ret);
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}
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return 0;
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}
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static void x509_name_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
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{
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X509_NAME *a;
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if (!pval || !*pval)
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return;
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a = (X509_NAME *)*pval;
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BUF_MEM_free(a->bytes);
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sk_X509_NAME_ENTRY_pop_free(a->entries, X509_NAME_ENTRY_free);
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OPENSSL_free(a->canon_enc);
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OPENSSL_free(a);
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*pval = NULL;
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}
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static void local_sk_X509_NAME_ENTRY_free(STACK_OF(X509_NAME_ENTRY) *ne)
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{
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sk_X509_NAME_ENTRY_free(ne);
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}
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static void local_sk_X509_NAME_ENTRY_pop_free(STACK_OF(X509_NAME_ENTRY) *ne)
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{
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sk_X509_NAME_ENTRY_pop_free(ne, X509_NAME_ENTRY_free);
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}
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static int x509_name_ex_d2i(ASN1_VALUE **val,
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const unsigned char **in, long len,
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const ASN1_ITEM *it, int tag, int aclass,
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char opt, ASN1_TLC *ctx)
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{
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const unsigned char *p = *in, *q;
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union {
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STACK_OF(STACK_OF_X509_NAME_ENTRY) *s;
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ASN1_VALUE *a;
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} intname = {
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NULL
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};
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union {
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X509_NAME *x;
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ASN1_VALUE *a;
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} nm = {
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NULL
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};
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int i, j, ret;
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STACK_OF(X509_NAME_ENTRY) *entries;
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X509_NAME_ENTRY *entry;
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if (len > X509_NAME_MAX)
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len = X509_NAME_MAX;
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q = p;
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/* Get internal representation of Name */
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ret = ASN1_item_ex_d2i(&intname.a,
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&p, len, ASN1_ITEM_rptr(X509_NAME_INTERNAL),
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tag, aclass, opt, ctx);
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if (ret <= 0)
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return ret;
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if (*val)
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x509_name_ex_free(val, NULL);
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if (!x509_name_ex_new(&nm.a, NULL))
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goto err;
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/* We've decoded it: now cache encoding */
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if (!BUF_MEM_grow(nm.x->bytes, p - q))
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goto err;
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memcpy(nm.x->bytes->data, q, p - q);
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/* Convert internal representation to X509_NAME structure */
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for (i = 0; i < sk_STACK_OF_X509_NAME_ENTRY_num(intname.s); i++) {
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entries = sk_STACK_OF_X509_NAME_ENTRY_value(intname.s, i);
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for (j = 0; j < sk_X509_NAME_ENTRY_num(entries); j++) {
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entry = sk_X509_NAME_ENTRY_value(entries, j);
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entry->set = i;
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if (!sk_X509_NAME_ENTRY_push(nm.x->entries, entry))
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goto err;
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sk_X509_NAME_ENTRY_set(entries, j, NULL);
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}
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}
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ret = x509_name_canon(nm.x);
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if (!ret)
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goto err;
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sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
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local_sk_X509_NAME_ENTRY_free);
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nm.x->modified = 0;
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*val = nm.a;
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*in = p;
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return ret;
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err:
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if (nm.x != NULL)
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X509_NAME_free(nm.x);
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sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
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local_sk_X509_NAME_ENTRY_pop_free);
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ASN1err(ASN1_F_X509_NAME_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
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return 0;
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}
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static int x509_name_ex_i2d(const ASN1_VALUE **val, unsigned char **out,
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const ASN1_ITEM *it, int tag, int aclass)
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{
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int ret;
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X509_NAME *a = (X509_NAME *)*val;
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if (a->modified) {
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ret = x509_name_encode(a);
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if (ret < 0)
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return ret;
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ret = x509_name_canon(a);
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if (ret < 0)
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return ret;
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}
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ret = a->bytes->length;
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if (out != NULL) {
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memcpy(*out, a->bytes->data, ret);
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*out += ret;
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}
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return ret;
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}
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static int x509_name_encode(X509_NAME *a)
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{
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union {
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STACK_OF(STACK_OF_X509_NAME_ENTRY) *s;
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const ASN1_VALUE *a;
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} intname = {
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NULL
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};
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int len;
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unsigned char *p;
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STACK_OF(X509_NAME_ENTRY) *entries = NULL;
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X509_NAME_ENTRY *entry;
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int i, set = -1;
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intname.s = sk_STACK_OF_X509_NAME_ENTRY_new_null();
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if (!intname.s)
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goto memerr;
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for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
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entry = sk_X509_NAME_ENTRY_value(a->entries, i);
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if (entry->set != set) {
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entries = sk_X509_NAME_ENTRY_new_null();
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if (!entries)
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goto memerr;
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if (!sk_STACK_OF_X509_NAME_ENTRY_push(intname.s, entries)) {
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sk_X509_NAME_ENTRY_free(entries);
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goto memerr;
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}
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set = entry->set;
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}
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if (!sk_X509_NAME_ENTRY_push(entries, entry))
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goto memerr;
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}
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len = ASN1_item_ex_i2d(&intname.a, NULL,
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ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
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if (!BUF_MEM_grow(a->bytes, len))
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goto memerr;
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p = (unsigned char *)a->bytes->data;
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ASN1_item_ex_i2d(&intname.a,
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&p, ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
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sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
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local_sk_X509_NAME_ENTRY_free);
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a->modified = 0;
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return len;
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memerr:
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sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
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local_sk_X509_NAME_ENTRY_free);
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ASN1err(ASN1_F_X509_NAME_ENCODE, ERR_R_MALLOC_FAILURE);
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return -1;
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}
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static int x509_name_ex_print(BIO *out, const ASN1_VALUE **pval,
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int indent,
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const char *fname, const ASN1_PCTX *pctx)
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{
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if (X509_NAME_print_ex(out, (const X509_NAME *)*pval,
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indent, pctx->nm_flags) <= 0)
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return 0;
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return 2;
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}
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/*
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* This function generates the canonical encoding of the Name structure. In
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* it all strings are converted to UTF8, leading, trailing and multiple
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* spaces collapsed, converted to lower case and the leading SEQUENCE header
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* removed. In future we could also normalize the UTF8 too. By doing this
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* comparison of Name structures can be rapidly performed by just using
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* memcmp() of the canonical encoding. By omitting the leading SEQUENCE name
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* constraints of type dirName can also be checked with a simple memcmp().
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*/
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static int x509_name_canon(X509_NAME *a)
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{
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unsigned char *p;
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STACK_OF(STACK_OF_X509_NAME_ENTRY) *intname;
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STACK_OF(X509_NAME_ENTRY) *entries = NULL;
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X509_NAME_ENTRY *entry, *tmpentry = NULL;
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int i, set = -1, ret = 0, len;
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OPENSSL_free(a->canon_enc);
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a->canon_enc = NULL;
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/* Special case: empty X509_NAME => null encoding */
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if (sk_X509_NAME_ENTRY_num(a->entries) == 0) {
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a->canon_enclen = 0;
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return 1;
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}
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intname = sk_STACK_OF_X509_NAME_ENTRY_new_null();
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if (intname == NULL) {
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X509err(X509_F_X509_NAME_CANON, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
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entry = sk_X509_NAME_ENTRY_value(a->entries, i);
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if (entry->set != set) {
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entries = sk_X509_NAME_ENTRY_new_null();
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if (entries == NULL)
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goto err;
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if (!sk_STACK_OF_X509_NAME_ENTRY_push(intname, entries)) {
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sk_X509_NAME_ENTRY_free(entries);
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X509err(X509_F_X509_NAME_CANON, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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set = entry->set;
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}
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tmpentry = X509_NAME_ENTRY_new();
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if (tmpentry == NULL) {
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X509err(X509_F_X509_NAME_CANON, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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tmpentry->object = OBJ_dup(entry->object);
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if (tmpentry->object == NULL) {
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X509err(X509_F_X509_NAME_CANON, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (!asn1_string_canon(tmpentry->value, entry->value))
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goto err;
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if (!sk_X509_NAME_ENTRY_push(entries, tmpentry)) {
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X509err(X509_F_X509_NAME_CANON, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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tmpentry = NULL;
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}
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/* Finally generate encoding */
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len = i2d_name_canon(intname, NULL);
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if (len < 0)
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goto err;
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a->canon_enclen = len;
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p = OPENSSL_malloc(a->canon_enclen);
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if (p == NULL) {
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X509err(X509_F_X509_NAME_CANON, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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a->canon_enc = p;
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i2d_name_canon(intname, &p);
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ret = 1;
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err:
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X509_NAME_ENTRY_free(tmpentry);
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sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname,
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local_sk_X509_NAME_ENTRY_pop_free);
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return ret;
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}
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/* Bitmap of all the types of string that will be canonicalized. */
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#define ASN1_MASK_CANON \
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(B_ASN1_UTF8STRING | B_ASN1_BMPSTRING | B_ASN1_UNIVERSALSTRING \
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| B_ASN1_PRINTABLESTRING | B_ASN1_T61STRING | B_ASN1_IA5STRING \
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| B_ASN1_VISIBLESTRING)
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static int asn1_string_canon(ASN1_STRING *out, const ASN1_STRING *in)
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{
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unsigned char *to, *from;
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int len, i;
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/* If type not in bitmask just copy string across */
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if (!(ASN1_tag2bit(in->type) & ASN1_MASK_CANON)) {
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if (!ASN1_STRING_copy(out, in))
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return 0;
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return 1;
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}
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out->type = V_ASN1_UTF8STRING;
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out->length = ASN1_STRING_to_UTF8(&out->data, in);
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if (out->length == -1)
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return 0;
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to = out->data;
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from = to;
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len = out->length;
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/*
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* Convert string in place to canonical form. Ultimately we may need to
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* handle a wider range of characters but for now ignore anything with
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* MSB set and rely on the ossl_isspace() to fail on bad characters without
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* needing isascii or range checks as well.
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*/
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/* Ignore leading spaces */
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while (len > 0 && ossl_isspace(*from)) {
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from++;
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len--;
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}
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to = from + len;
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/* Ignore trailing spaces */
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while (len > 0 && ossl_isspace(to[-1])) {
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to--;
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len--;
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}
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to = out->data;
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i = 0;
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while (i < len) {
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/* If not ASCII set just copy across */
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if (!ossl_isascii(*from)) {
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*to++ = *from++;
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i++;
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}
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/* Collapse multiple spaces */
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else if (ossl_isspace(*from)) {
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/* Copy one space across */
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*to++ = ' ';
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/*
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* Ignore subsequent spaces. Note: don't need to check len here
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* because we know the last character is a non-space so we can't
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* overflow.
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*/
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do {
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from++;
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i++;
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}
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while (ossl_isspace(*from));
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} else {
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*to++ = ossl_tolower(*from);
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from++;
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i++;
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}
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}
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out->length = to - out->data;
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return 1;
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}
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static int i2d_name_canon(const STACK_OF(STACK_OF_X509_NAME_ENTRY) * _intname,
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unsigned char **in)
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{
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int i, len, ltmp;
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const ASN1_VALUE *v;
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STACK_OF(ASN1_VALUE) *intname = (STACK_OF(ASN1_VALUE) *)_intname;
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len = 0;
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for (i = 0; i < sk_ASN1_VALUE_num(intname); i++) {
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v = sk_ASN1_VALUE_value(intname, i);
|
|
ltmp = ASN1_item_ex_i2d(&v, in,
|
|
ASN1_ITEM_rptr(X509_NAME_ENTRIES), -1, -1);
|
|
if (ltmp < 0)
|
|
return ltmp;
|
|
len += ltmp;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
int X509_NAME_set(X509_NAME **xn, const X509_NAME *name)
|
|
{
|
|
X509_NAME *name_copy;
|
|
|
|
if (*xn == name)
|
|
return *xn != NULL;
|
|
if ((name_copy = X509_NAME_dup(name)) == NULL)
|
|
return 0;
|
|
X509_NAME_free(*xn);
|
|
*xn = name_copy;
|
|
return 1;
|
|
}
|
|
|
|
int X509_NAME_print(BIO *bp, const X509_NAME *name, int obase)
|
|
{
|
|
char *s, *c, *b;
|
|
int l, i;
|
|
|
|
l = 80 - 2 - obase;
|
|
|
|
b = X509_NAME_oneline(name, NULL, 0);
|
|
if (!b)
|
|
return 0;
|
|
if (!*b) {
|
|
OPENSSL_free(b);
|
|
return 1;
|
|
}
|
|
s = b + 1; /* skip the first slash */
|
|
|
|
c = s;
|
|
for (;;) {
|
|
if (((*s == '/') &&
|
|
(ossl_isupper(s[1]) && ((s[2] == '=') ||
|
|
(ossl_isupper(s[2]) && (s[3] == '='))
|
|
))) || (*s == '\0'))
|
|
{
|
|
i = s - c;
|
|
if (BIO_write(bp, c, i) != i)
|
|
goto err;
|
|
c = s + 1; /* skip following slash */
|
|
if (*s != '\0') {
|
|
if (BIO_write(bp, ", ", 2) != 2)
|
|
goto err;
|
|
}
|
|
l--;
|
|
}
|
|
if (*s == '\0')
|
|
break;
|
|
s++;
|
|
l--;
|
|
}
|
|
|
|
OPENSSL_free(b);
|
|
return 1;
|
|
err:
|
|
X509err(X509_F_X509_NAME_PRINT, ERR_R_BUF_LIB);
|
|
OPENSSL_free(b);
|
|
return 0;
|
|
}
|
|
|
|
int X509_NAME_get0_der(X509_NAME *nm, const unsigned char **pder,
|
|
size_t *pderlen)
|
|
{
|
|
/* Make sure encoding is valid */
|
|
if (i2d_X509_NAME(nm, NULL) <= 0)
|
|
return 0;
|
|
if (pder != NULL)
|
|
*pder = (unsigned char *)nm->bytes->data;
|
|
if (pderlen != NULL)
|
|
*pderlen = nm->bytes->length;
|
|
return 1;
|
|
}
|