--- /dev/null
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.] */
+
+#include <openssl/asn1.h>
+
+#include <limits.h>
+#include <string.h>
+
+#include <openssl/asn1t.h>
+#include <openssl/buf.h>
+#include <openssl/err.h>
+#include <openssl/mem.h>
+
+#include "../internal.h"
+
+/*
+ * Constructed types with a recursive definition (such as can be found in PKCS7)
+ * could eventually exceed the stack given malicious input with excessive
+ * recursion. Therefore we limit the stack depth. This is the maximum number of
+ * recursive invocations of asn1_item_embed_d2i().
+ */
+#define ASN1_MAX_CONSTRUCTED_NEST 30
+
+static int asn1_check_eoc(const unsigned char **in, long len);
+static int asn1_find_end(const unsigned char **in, long len, char inf);
+
+static int asn1_collect(BUF_MEM *buf, const unsigned char **in, long len,
+ char inf, int tag, int aclass, int depth);
+
+static int collect_data(BUF_MEM *buf, const unsigned char **p, long plen);
+
+static int asn1_check_tlen(long *olen, int *otag, unsigned char *oclass,
+ char *inf, char *cst,
+ const unsigned char **in, long len,
+ int exptag, int expclass, char opt, ASN1_TLC *ctx);
+
+static int asn1_template_ex_d2i(ASN1_VALUE **pval,
+ const unsigned char **in, long len,
+ const ASN1_TEMPLATE *tt, char opt,
+ ASN1_TLC *ctx, int depth);
+static int asn1_template_noexp_d2i(ASN1_VALUE **val,
+ const unsigned char **in, long len,
+ const ASN1_TEMPLATE *tt, char opt,
+ ASN1_TLC *ctx, int depth);
+static int asn1_d2i_ex_primitive(ASN1_VALUE **pval,
+ const unsigned char **in, long len,
+ const ASN1_ITEM *it,
+ int tag, int aclass, char opt,
+ ASN1_TLC *ctx);
+
+/* Table to convert tags to bit values, used for MSTRING type */
+static const unsigned long tag2bit[32] = {
+ 0, 0, 0, B_ASN1_BIT_STRING, /* tags 0 - 3 */
+ B_ASN1_OCTET_STRING, 0, 0, B_ASN1_UNKNOWN, /* tags 4- 7 */
+ B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, /* tags
+ * 8-11 */
+ B_ASN1_UTF8STRING, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, /* tags
+ * 12-15
+ */
+ B_ASN1_SEQUENCE, 0, B_ASN1_NUMERICSTRING, B_ASN1_PRINTABLESTRING, /* tags
+ * 16-19
+ */
+ B_ASN1_T61STRING, B_ASN1_VIDEOTEXSTRING, B_ASN1_IA5STRING, /* tags 20-22 */
+ B_ASN1_UTCTIME, B_ASN1_GENERALIZEDTIME, /* tags 23-24 */
+ B_ASN1_GRAPHICSTRING, B_ASN1_ISO64STRING, B_ASN1_GENERALSTRING, /* tags
+ * 25-27 */
+ B_ASN1_UNIVERSALSTRING, B_ASN1_UNKNOWN, B_ASN1_BMPSTRING, B_ASN1_UNKNOWN, /* tags
+ * 28-31
+ */
+};
+
+unsigned long ASN1_tag2bit(int tag)
+{
+ if ((tag < 0) || (tag > 30))
+ return 0;
+ return tag2bit[tag];
+}
+
+/* Macro to initialize and invalidate the cache */
+
+#define asn1_tlc_clear(c) if (c) (c)->valid = 0
+/* Version to avoid compiler warning about 'c' always non-NULL */
+#define asn1_tlc_clear_nc(c) (c)->valid = 0
+
+/*
+ * Decode an ASN1 item, this currently behaves just like a standard 'd2i'
+ * function. 'in' points to a buffer to read the data from, in future we
+ * will have more advanced versions that can input data a piece at a time and
+ * this will simply be a special case.
+ */
+
+ASN1_VALUE *ASN1_item_d2i(ASN1_VALUE **pval,
+ const unsigned char **in, long len,
+ const ASN1_ITEM *it)
+{
+ ASN1_TLC c;
+ ASN1_VALUE *ptmpval = NULL;
+ if (!pval)
+ pval = &ptmpval;
+ asn1_tlc_clear_nc(&c);
+ if (ASN1_item_ex_d2i(pval, in, len, it, -1, 0, 0, &c) > 0)
+ return *pval;
+ return NULL;
+}
+
+/*
+ * Decode an item, taking care of IMPLICIT tagging, if any. If 'opt' set and
+ * tag mismatch return -1 to handle OPTIONAL
+ */
+
+static int asn1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in,
+ long len, const ASN1_ITEM *it, int tag, int aclass,
+ char opt, ASN1_TLC *ctx, int depth)
+{
+ const ASN1_TEMPLATE *tt, *errtt = NULL;
+ const ASN1_COMPAT_FUNCS *cf;
+ const ASN1_EXTERN_FUNCS *ef;
+ const ASN1_AUX *aux = it->funcs;
+ ASN1_aux_cb *asn1_cb;
+ const unsigned char *p = NULL, *q;
+ unsigned char *wp = NULL; /* BIG FAT WARNING! BREAKS CONST WHERE USED */
+ unsigned char imphack = 0, oclass;
+ char seq_eoc, seq_nolen, cst, isopt;
+ long tmplen;
+ int i;
+ int otag;
+ int ret = 0;
+ ASN1_VALUE **pchptr, *ptmpval;
+ int combine = aclass & ASN1_TFLG_COMBINE;
+ aclass &= ~ASN1_TFLG_COMBINE;
+ if (!pval)
+ return 0;
+ if (aux && aux->asn1_cb)
+ asn1_cb = aux->asn1_cb;
+ else
+ asn1_cb = 0;
+
+ /*
+ * Bound |len| to comfortably fit in an int. Lengths in this module often
+ * switch between int and long without overflow checks.
+ */
+ if (len > INT_MAX/2) {
+ len = INT_MAX/2;
+ }
+
+ if (++depth > ASN1_MAX_CONSTRUCTED_NEST) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_TOO_DEEP);
+ goto err;
+ }
+
+ switch (it->itype) {
+ case ASN1_ITYPE_PRIMITIVE:
+ if (it->templates) {
+ /*
+ * tagging or OPTIONAL is currently illegal on an item template
+ * because the flags can't get passed down. In practice this
+ * isn't a problem: we include the relevant flags from the item
+ * template in the template itself.
+ */
+ if ((tag != -1) || opt) {
+ OPENSSL_PUT_ERROR(ASN1,
+ ASN1_R_ILLEGAL_OPTIONS_ON_ITEM_TEMPLATE);
+ goto err;
+ }
+ return asn1_template_ex_d2i(pval, in, len,
+ it->templates, opt, ctx, depth);
+ }
+ return asn1_d2i_ex_primitive(pval, in, len, it,
+ tag, aclass, opt, ctx);
+ break;
+
+ case ASN1_ITYPE_MSTRING:
+ p = *in;
+ /* Just read in tag and class */
+ ret = asn1_check_tlen(NULL, &otag, &oclass, NULL, NULL,
+ &p, len, -1, 0, 1, ctx);
+ if (!ret) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ goto err;
+ }
+
+ /* Must be UNIVERSAL class */
+ if (oclass != V_ASN1_UNIVERSAL) {
+ /* If OPTIONAL, assume this is OK */
+ if (opt)
+ return -1;
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_MSTRING_NOT_UNIVERSAL);
+ goto err;
+ }
+ /* Check tag matches bit map */
+ if (!(ASN1_tag2bit(otag) & it->utype)) {
+ /* If OPTIONAL, assume this is OK */
+ if (opt)
+ return -1;
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_MSTRING_WRONG_TAG);
+ goto err;
+ }
+ return asn1_d2i_ex_primitive(pval, in, len, it, otag, 0, 0, ctx);
+
+ case ASN1_ITYPE_EXTERN:
+ /* Use new style d2i */
+ ef = it->funcs;
+ return ef->asn1_ex_d2i(pval, in, len, it, tag, aclass, opt, ctx);
+
+ case ASN1_ITYPE_COMPAT:
+ /* we must resort to old style evil hackery */
+ cf = it->funcs;
+
+ /* If OPTIONAL see if it is there */
+ if (opt) {
+ int exptag;
+ p = *in;
+ if (tag == -1)
+ exptag = it->utype;
+ else
+ exptag = tag;
+ /*
+ * Don't care about anything other than presence of expected tag
+ */
+
+ ret = asn1_check_tlen(NULL, NULL, NULL, NULL, NULL,
+ &p, len, exptag, aclass, 1, ctx);
+ if (!ret) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ goto err;
+ }
+ if (ret == -1)
+ return -1;
+ }
+
+ /*
+ * This is the old style evil hack IMPLICIT handling: since the
+ * underlying code is expecting a tag and class other than the one
+ * present we change the buffer temporarily then change it back
+ * afterwards. This doesn't and never did work for tags > 30. Yes
+ * this is *horrible* but it is only needed for old style d2i which
+ * will hopefully not be around for much longer. FIXME: should copy
+ * the buffer then modify it so the input buffer can be const: we
+ * should *always* copy because the old style d2i might modify the
+ * buffer.
+ */
+
+ if (tag != -1) {
+ wp = *(unsigned char **)in;
+ imphack = *wp;
+ if (p == NULL) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ goto err;
+ }
+ *wp = (unsigned char)((*p & V_ASN1_CONSTRUCTED)
+ | it->utype);
+ }
+
+ ptmpval = cf->asn1_d2i(pval, in, len);
+
+ if (tag != -1)
+ *wp = imphack;
+
+ if (ptmpval)
+ return 1;
+
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ goto err;
+
+ case ASN1_ITYPE_CHOICE:
+ if (asn1_cb && !asn1_cb(ASN1_OP_D2I_PRE, pval, it, NULL))
+ goto auxerr;
+
+ if (*pval) {
+ /* Free up and zero CHOICE value if initialised */
+ i = asn1_get_choice_selector(pval, it);
+ if ((i >= 0) && (i < it->tcount)) {
+ tt = it->templates + i;
+ pchptr = asn1_get_field_ptr(pval, tt);
+ ASN1_template_free(pchptr, tt);
+ asn1_set_choice_selector(pval, -1, it);
+ }
+ } else if (!ASN1_item_ex_new(pval, it)) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ goto err;
+ }
+ /* CHOICE type, try each possibility in turn */
+ p = *in;
+ for (i = 0, tt = it->templates; i < it->tcount; i++, tt++) {
+ pchptr = asn1_get_field_ptr(pval, tt);
+ /*
+ * We mark field as OPTIONAL so its absence can be recognised.
+ */
+ ret = asn1_template_ex_d2i(pchptr, &p, len, tt, 1, ctx, depth);
+ /* If field not present, try the next one */
+ if (ret == -1)
+ continue;
+ /* If positive return, read OK, break loop */
+ if (ret > 0)
+ break;
+ /* Otherwise must be an ASN1 parsing error */
+ errtt = tt;
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ goto err;
+ }
+
+ /* Did we fall off the end without reading anything? */
+ if (i == it->tcount) {
+ /* If OPTIONAL, this is OK */
+ if (opt) {
+ /* Free and zero it */
+ ASN1_item_ex_free(pval, it);
+ return -1;
+ }
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NO_MATCHING_CHOICE_TYPE);
+ goto err;
+ }
+
+ asn1_set_choice_selector(pval, i, it);
+ if (asn1_cb && !asn1_cb(ASN1_OP_D2I_POST, pval, it, NULL))
+ goto auxerr;
+ *in = p;
+ return 1;
+
+ case ASN1_ITYPE_NDEF_SEQUENCE:
+ case ASN1_ITYPE_SEQUENCE:
+ p = *in;
+ tmplen = len;
+
+ /* If no IMPLICIT tagging set to SEQUENCE, UNIVERSAL */
+ if (tag == -1) {
+ tag = V_ASN1_SEQUENCE;
+ aclass = V_ASN1_UNIVERSAL;
+ }
+ /* Get SEQUENCE length and update len, p */
+ ret = asn1_check_tlen(&len, NULL, NULL, &seq_eoc, &cst,
+ &p, len, tag, aclass, opt, ctx);
+ if (!ret) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ goto err;
+ } else if (ret == -1)
+ return -1;
+ if (aux && (aux->flags & ASN1_AFLG_BROKEN)) {
+ len = tmplen - (p - *in);
+ seq_nolen = 1;
+ }
+ /* If indefinite we don't do a length check */
+ else
+ seq_nolen = seq_eoc;
+ if (!cst) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_SEQUENCE_NOT_CONSTRUCTED);
+ goto err;
+ }
+
+ if (!*pval && !ASN1_item_ex_new(pval, it)) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ goto err;
+ }
+
+ if (asn1_cb && !asn1_cb(ASN1_OP_D2I_PRE, pval, it, NULL))
+ goto auxerr;
+
+ /* Free up and zero any ADB found */
+ for (i = 0, tt = it->templates; i < it->tcount; i++, tt++) {
+ if (tt->flags & ASN1_TFLG_ADB_MASK) {
+ const ASN1_TEMPLATE *seqtt;
+ ASN1_VALUE **pseqval;
+ seqtt = asn1_do_adb(pval, tt, 0);
+ if (seqtt == NULL)
+ continue;
+ pseqval = asn1_get_field_ptr(pval, seqtt);
+ ASN1_template_free(pseqval, seqtt);
+ }
+ }
+
+ /* Get each field entry */
+ for (i = 0, tt = it->templates; i < it->tcount; i++, tt++) {
+ const ASN1_TEMPLATE *seqtt;
+ ASN1_VALUE **pseqval;
+ seqtt = asn1_do_adb(pval, tt, 1);
+ if (seqtt == NULL)
+ goto err;
+ pseqval = asn1_get_field_ptr(pval, seqtt);
+ /* Have we ran out of data? */
+ if (!len)
+ break;
+ q = p;
+ if (asn1_check_eoc(&p, len)) {
+ if (!seq_eoc) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNEXPECTED_EOC);
+ goto err;
+ }
+ len -= p - q;
+ seq_eoc = 0;
+ q = p;
+ break;
+ }
+ /*
+ * This determines the OPTIONAL flag value. The field cannot be
+ * omitted if it is the last of a SEQUENCE and there is still
+ * data to be read. This isn't strictly necessary but it
+ * increases efficiency in some cases.
+ */
+ if (i == (it->tcount - 1))
+ isopt = 0;
+ else
+ isopt = (char)(seqtt->flags & ASN1_TFLG_OPTIONAL);
+ /*
+ * attempt to read in field, allowing each to be OPTIONAL
+ */
+
+ ret = asn1_template_ex_d2i(pseqval, &p, len, seqtt, isopt, ctx,
+ depth);
+ if (!ret) {
+ errtt = seqtt;
+ goto err;
+ } else if (ret == -1) {
+ /*
+ * OPTIONAL component absent. Free and zero the field.
+ */
+ ASN1_template_free(pseqval, seqtt);
+ continue;
+ }
+ /* Update length */
+ len -= p - q;
+ }
+
+ /* Check for EOC if expecting one */
+ if (seq_eoc && !asn1_check_eoc(&p, len)) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_MISSING_EOC);
+ goto err;
+ }
+ /* Check all data read */
+ if (!seq_nolen && len) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_SEQUENCE_LENGTH_MISMATCH);
+ goto err;
+ }
+
+ /*
+ * If we get here we've got no more data in the SEQUENCE, however we
+ * may not have read all fields so check all remaining are OPTIONAL
+ * and clear any that are.
+ */
+ for (; i < it->tcount; tt++, i++) {
+ const ASN1_TEMPLATE *seqtt;
+ seqtt = asn1_do_adb(pval, tt, 1);
+ if (seqtt == NULL)
+ goto err;
+ if (seqtt->flags & ASN1_TFLG_OPTIONAL) {
+ ASN1_VALUE **pseqval;
+ pseqval = asn1_get_field_ptr(pval, seqtt);
+ ASN1_template_free(pseqval, seqtt);
+ } else {
+ errtt = seqtt;
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_FIELD_MISSING);
+ goto err;
+ }
+ }
+ /* Save encoding */
+ if (!asn1_enc_save(pval, *in, p - *in, it))
+ goto auxerr;
+ if (asn1_cb && !asn1_cb(ASN1_OP_D2I_POST, pval, it, NULL))
+ goto auxerr;
+ *in = p;
+ return 1;
+
+ default:
+ return 0;
+ }
+ auxerr:
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_AUX_ERROR);
+ err:
+ if (combine == 0)
+ ASN1_item_ex_free(pval, it);
+ if (errtt)
+ ERR_add_error_data(4, "Field=", errtt->field_name,
+ ", Type=", it->sname);
+ else
+ ERR_add_error_data(2, "Type=", it->sname);
+ return 0;
+}
+
+int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
+ const ASN1_ITEM *it,
+ int tag, int aclass, char opt, ASN1_TLC *ctx)
+{
+ return asn1_item_ex_d2i(pval, in, len, it, tag, aclass, opt, ctx, 0);
+}
+
+/*
+ * Templates are handled with two separate functions. One handles any
+ * EXPLICIT tag and the other handles the rest.
+ */
+
+static int asn1_template_ex_d2i(ASN1_VALUE **val,
+ const unsigned char **in, long inlen,
+ const ASN1_TEMPLATE *tt, char opt,
+ ASN1_TLC *ctx, int depth)
+{
+ int flags, aclass;
+ int ret;
+ long len;
+ const unsigned char *p, *q;
+ char exp_eoc;
+ if (!val)
+ return 0;
+ flags = tt->flags;
+ aclass = flags & ASN1_TFLG_TAG_CLASS;
+
+ p = *in;
+
+ /* Check if EXPLICIT tag expected */
+ if (flags & ASN1_TFLG_EXPTAG) {
+ char cst;
+ /*
+ * Need to work out amount of data available to the inner content and
+ * where it starts: so read in EXPLICIT header to get the info.
+ */
+ ret = asn1_check_tlen(&len, NULL, NULL, &exp_eoc, &cst,
+ &p, inlen, tt->tag, aclass, opt, ctx);
+ q = p;
+ if (!ret) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ return 0;
+ } else if (ret == -1)
+ return -1;
+ if (!cst) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_EXPLICIT_TAG_NOT_CONSTRUCTED);
+ return 0;
+ }
+ /* We've found the field so it can't be OPTIONAL now */
+ ret = asn1_template_noexp_d2i(val, &p, len, tt, 0, ctx, depth);
+ if (!ret) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ return 0;
+ }
+ /* We read the field in OK so update length */
+ len -= p - q;
+ if (exp_eoc) {
+ /* If NDEF we must have an EOC here */
+ if (!asn1_check_eoc(&p, len)) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_MISSING_EOC);
+ goto err;
+ }
+ } else {
+ /*
+ * Otherwise we must hit the EXPLICIT tag end or its an error
+ */
+ if (len) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_EXPLICIT_LENGTH_MISMATCH);
+ goto err;
+ }
+ }
+ } else
+ return asn1_template_noexp_d2i(val, in, inlen, tt, opt, ctx, depth);
+
+ *in = p;
+ return 1;
+
+ err:
+ ASN1_template_free(val, tt);
+ return 0;
+}
+
+static int asn1_template_noexp_d2i(ASN1_VALUE **val,
+ const unsigned char **in, long len,
+ const ASN1_TEMPLATE *tt, char opt,
+ ASN1_TLC *ctx, int depth)
+{
+ int flags, aclass;
+ int ret;
+ const unsigned char *p;
+ if (!val)
+ return 0;
+ flags = tt->flags;
+ aclass = flags & ASN1_TFLG_TAG_CLASS;
+
+ p = *in;
+
+ if (flags & ASN1_TFLG_SK_MASK) {
+ /* SET OF, SEQUENCE OF */
+ int sktag, skaclass;
+ char sk_eoc;
+ /* First work out expected inner tag value */
+ if (flags & ASN1_TFLG_IMPTAG) {
+ sktag = tt->tag;
+ skaclass = aclass;
+ } else {
+ skaclass = V_ASN1_UNIVERSAL;
+ if (flags & ASN1_TFLG_SET_OF)
+ sktag = V_ASN1_SET;
+ else
+ sktag = V_ASN1_SEQUENCE;
+ }
+ /* Get the tag */
+ ret = asn1_check_tlen(&len, NULL, NULL, &sk_eoc, NULL,
+ &p, len, sktag, skaclass, opt, ctx);
+ if (!ret) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ return 0;
+ } else if (ret == -1)
+ return -1;
+ if (!*val)
+ *val = (ASN1_VALUE *)sk_new_null();
+ else {
+ /*
+ * We've got a valid STACK: free up any items present
+ */
+ STACK_OF(ASN1_VALUE) *sktmp = (STACK_OF(ASN1_VALUE) *)*val;
+ ASN1_VALUE *vtmp;
+ while (sk_ASN1_VALUE_num(sktmp) > 0) {
+ vtmp = sk_ASN1_VALUE_pop(sktmp);
+ ASN1_item_ex_free(&vtmp, ASN1_ITEM_ptr(tt->item));
+ }
+ }
+
+ if (!*val) {
+ OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ /* Read as many items as we can */
+ while (len > 0) {
+ ASN1_VALUE *skfield;
+ const unsigned char *q = p;
+ /* See if EOC found */
+ if (asn1_check_eoc(&p, len)) {
+ if (!sk_eoc) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNEXPECTED_EOC);
+ goto err;
+ }
+ len -= p - q;
+ sk_eoc = 0;
+ break;
+ }
+ skfield = NULL;
+ if (!asn1_item_ex_d2i(&skfield, &p, len, ASN1_ITEM_ptr(tt->item),
+ -1, 0, 0, ctx, depth)) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ goto err;
+ }
+ len -= p - q;
+ if (!sk_ASN1_VALUE_push((STACK_OF(ASN1_VALUE) *)*val, skfield)) {
+ ASN1_item_ex_free(&skfield, ASN1_ITEM_ptr(tt->item));
+ OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ }
+ if (sk_eoc) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_MISSING_EOC);
+ goto err;
+ }
+ } else if (flags & ASN1_TFLG_IMPTAG) {
+ /* IMPLICIT tagging */
+ ret = asn1_item_ex_d2i(val, &p, len, ASN1_ITEM_ptr(tt->item), tt->tag,
+ aclass, opt, ctx, depth);
+ if (!ret) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ goto err;
+ } else if (ret == -1)
+ return -1;
+ } else {
+ /* Nothing special */
+ ret = asn1_item_ex_d2i(val, &p, len, ASN1_ITEM_ptr(tt->item),
+ -1, tt->flags & ASN1_TFLG_COMBINE, opt, ctx,
+ depth);
+ if (!ret) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ goto err;
+ } else if (ret == -1)
+ return -1;
+ }
+
+ *in = p;
+ return 1;
+
+ err:
+ ASN1_template_free(val, tt);
+ return 0;
+}
+
+static int asn1_d2i_ex_primitive(ASN1_VALUE **pval,
+ const unsigned char **in, long inlen,
+ const ASN1_ITEM *it,
+ int tag, int aclass, char opt, ASN1_TLC *ctx)
+{
+ int ret = 0, utype;
+ long plen;
+ char cst, inf, free_cont = 0;
+ const unsigned char *p;
+ BUF_MEM buf = {0, NULL, 0 };
+ const unsigned char *cont = NULL;
+ long len;
+ if (!pval) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_NULL);
+ return 0; /* Should never happen */
+ }
+
+ if (it->itype == ASN1_ITYPE_MSTRING) {
+ utype = tag;
+ tag = -1;
+ } else
+ utype = it->utype;
+
+ if (utype == V_ASN1_ANY) {
+ /* If type is ANY need to figure out type from tag */
+ unsigned char oclass;
+ if (tag >= 0) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_TAGGED_ANY);
+ return 0;
+ }
+ if (opt) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_OPTIONAL_ANY);
+ return 0;
+ }
+ p = *in;
+ ret = asn1_check_tlen(NULL, &utype, &oclass, NULL, NULL,
+ &p, inlen, -1, 0, 0, ctx);
+ if (!ret) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ return 0;
+ }
+ if (oclass != V_ASN1_UNIVERSAL)
+ utype = V_ASN1_OTHER;
+ }
+ if (tag == -1) {
+ tag = utype;
+ aclass = V_ASN1_UNIVERSAL;
+ }
+ p = *in;
+ /* Check header */
+ ret = asn1_check_tlen(&plen, NULL, NULL, &inf, &cst,
+ &p, inlen, tag, aclass, opt, ctx);
+ if (!ret) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ return 0;
+ } else if (ret == -1)
+ return -1;
+ ret = 0;
+ /* SEQUENCE, SET and "OTHER" are left in encoded form */
+ if ((utype == V_ASN1_SEQUENCE)
+ || (utype == V_ASN1_SET) || (utype == V_ASN1_OTHER)) {
+ /*
+ * Clear context cache for type OTHER because the auto clear when we
+ * have a exact match wont work
+ */
+ if (utype == V_ASN1_OTHER) {
+ asn1_tlc_clear(ctx);
+ }
+ /* SEQUENCE and SET must be constructed */
+ else if (!cst) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_TYPE_NOT_CONSTRUCTED);
+ return 0;
+ }
+
+ cont = *in;
+ /* If indefinite length constructed find the real end */
+ if (inf) {
+ if (!asn1_find_end(&p, plen, inf))
+ goto err;
+ len = p - cont;
+ } else {
+ len = p - cont + plen;
+ p += plen;
+ }
+ } else if (cst) {
+ if (utype == V_ASN1_NULL || utype == V_ASN1_BOOLEAN
+ || utype == V_ASN1_OBJECT || utype == V_ASN1_INTEGER
+ || utype == V_ASN1_ENUMERATED) {
+ /* These types only have primitive encodings. */
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_TYPE_NOT_PRIMITIVE);
+ return 0;
+ }
+
+ /* Free any returned 'buf' content */
+ free_cont = 1;
+ /*
+ * Should really check the internal tags are correct but some things
+ * may get this wrong. The relevant specs say that constructed string
+ * types should be OCTET STRINGs internally irrespective of the type.
+ * So instead just check for UNIVERSAL class and ignore the tag.
+ */
+ if (!asn1_collect(&buf, &p, plen, inf, -1, V_ASN1_UNIVERSAL, 0)) {
+ goto err;
+ }
+ len = buf.length;
+ /* Append a final null to string */
+ if (!BUF_MEM_grow_clean(&buf, len + 1)) {
+ OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ buf.data[len] = 0;
+ cont = (const unsigned char *)buf.data;
+ } else {
+ cont = p;
+ len = plen;
+ p += plen;
+ }
+
+ /* We now have content length and type: translate into a structure */
+ /* asn1_ex_c2i may reuse allocated buffer, and so sets free_cont to 0 */
+ if (!asn1_ex_c2i(pval, cont, len, utype, &free_cont, it))
+ goto err;
+
+ *in = p;
+ ret = 1;
+ err:
+ if (free_cont && buf.data)
+ OPENSSL_free(buf.data);
+ return ret;
+}
+
+/* Translate ASN1 content octets into a structure */
+
+int asn1_ex_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
+ int utype, char *free_cont, const ASN1_ITEM *it)
+{
+ ASN1_VALUE **opval = NULL;
+ ASN1_STRING *stmp;
+ ASN1_TYPE *typ = NULL;
+ int ret = 0;
+ const ASN1_PRIMITIVE_FUNCS *pf;
+ ASN1_INTEGER **tint;
+ pf = it->funcs;
+
+ if (pf && pf->prim_c2i)
+ return pf->prim_c2i(pval, cont, len, utype, free_cont, it);
+ /* If ANY type clear type and set pointer to internal value */
+ if (it->utype == V_ASN1_ANY) {
+ if (!*pval) {
+ typ = ASN1_TYPE_new();
+ if (typ == NULL)
+ goto err;
+ *pval = (ASN1_VALUE *)typ;
+ } else
+ typ = (ASN1_TYPE *)*pval;
+
+ if (utype != typ->type)
+ ASN1_TYPE_set(typ, utype, NULL);
+ opval = pval;
+ pval = &typ->value.asn1_value;
+ }
+ switch (utype) {
+ case V_ASN1_OBJECT:
+ if (!c2i_ASN1_OBJECT((ASN1_OBJECT **)pval, &cont, len))
+ goto err;
+ break;
+
+ case V_ASN1_NULL:
+ if (len) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NULL_IS_WRONG_LENGTH);
+ goto err;
+ }
+ *pval = (ASN1_VALUE *)1;
+ break;
+
+ case V_ASN1_BOOLEAN:
+ if (len != 1) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_BOOLEAN_IS_WRONG_LENGTH);
+ goto err;
+ } else {
+ ASN1_BOOLEAN *tbool;
+ tbool = (ASN1_BOOLEAN *)pval;
+ *tbool = *cont;
+ }
+ break;
+
+ case V_ASN1_BIT_STRING:
+ if (!c2i_ASN1_BIT_STRING((ASN1_BIT_STRING **)pval, &cont, len))
+ goto err;
+ break;
+
+ case V_ASN1_INTEGER:
+ case V_ASN1_ENUMERATED:
+ tint = (ASN1_INTEGER **)pval;
+ if (!c2i_ASN1_INTEGER(tint, &cont, len))
+ goto err;
+ /* Fixup type to match the expected form */
+ (*tint)->type = utype | ((*tint)->type & V_ASN1_NEG);
+ break;
+
+ case V_ASN1_OCTET_STRING:
+ case V_ASN1_NUMERICSTRING:
+ case V_ASN1_PRINTABLESTRING:
+ case V_ASN1_T61STRING:
+ case V_ASN1_VIDEOTEXSTRING:
+ case V_ASN1_IA5STRING:
+ case V_ASN1_UTCTIME:
+ case V_ASN1_GENERALIZEDTIME:
+ case V_ASN1_GRAPHICSTRING:
+ case V_ASN1_VISIBLESTRING:
+ case V_ASN1_GENERALSTRING:
+ case V_ASN1_UNIVERSALSTRING:
+ case V_ASN1_BMPSTRING:
+ case V_ASN1_UTF8STRING:
+ case V_ASN1_OTHER:
+ case V_ASN1_SET:
+ case V_ASN1_SEQUENCE:
+ default:
+ if (utype == V_ASN1_BMPSTRING && (len & 1)) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_BMPSTRING_IS_WRONG_LENGTH);
+ goto err;
+ }
+ if (utype == V_ASN1_UNIVERSALSTRING && (len & 3)) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNIVERSALSTRING_IS_WRONG_LENGTH);
+ goto err;
+ }
+ /* All based on ASN1_STRING and handled the same */
+ if (!*pval) {
+ stmp = ASN1_STRING_type_new(utype);
+ if (!stmp) {
+ OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ *pval = (ASN1_VALUE *)stmp;
+ } else {
+ stmp = (ASN1_STRING *)*pval;
+ stmp->type = utype;
+ }
+ /* If we've already allocated a buffer use it */
+ if (*free_cont) {
+ if (stmp->data)
+ OPENSSL_free(stmp->data);
+ stmp->data = (unsigned char *)cont; /* UGLY CAST! RL */
+ stmp->length = len;
+ *free_cont = 0;
+ } else {
+ if (!ASN1_STRING_set(stmp, cont, len)) {
+ OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
+ ASN1_STRING_free(stmp);
+ *pval = NULL;
+ goto err;
+ }
+ }
+ break;
+ }
+ /* If ASN1_ANY and NULL type fix up value */
+ if (typ && (utype == V_ASN1_NULL))
+ typ->value.ptr = NULL;
+
+ ret = 1;
+ err:
+ if (!ret) {
+ ASN1_TYPE_free(typ);
+ if (opval)
+ *opval = NULL;
+ }
+ return ret;
+}
+
+/*
+ * This function finds the end of an ASN1 structure when passed its maximum
+ * length, whether it is indefinite length and a pointer to the content. This
+ * is more efficient than calling asn1_collect because it does not recurse on
+ * each indefinite length header.
+ */
+
+static int asn1_find_end(const unsigned char **in, long len, char inf)
+{
+ int expected_eoc;
+ long plen;
+ const unsigned char *p = *in, *q;
+ /* If not indefinite length constructed just add length */
+ if (inf == 0) {
+ *in += len;
+ return 1;
+ }
+ expected_eoc = 1;
+ /*
+ * Indefinite length constructed form. Find the end when enough EOCs are
+ * found. If more indefinite length constructed headers are encountered
+ * increment the expected eoc count otherwise just skip to the end of the
+ * data.
+ */
+ while (len > 0) {
+ if (asn1_check_eoc(&p, len)) {
+ expected_eoc--;
+ if (expected_eoc == 0)
+ break;
+ len -= 2;
+ continue;
+ }
+ q = p;
+ /* Just read in a header: only care about the length */
+ if (!asn1_check_tlen(&plen, NULL, NULL, &inf, NULL, &p, len,
+ -1, 0, 0, NULL)) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ return 0;
+ }
+ if (inf)
+ expected_eoc++;
+ else
+ p += plen;
+ len -= p - q;
+ }
+ if (expected_eoc) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_MISSING_EOC);
+ return 0;
+ }
+ *in = p;
+ return 1;
+}
+
+/*
+ * This function collects the asn1 data from a constructred string type into
+ * a buffer. The values of 'in' and 'len' should refer to the contents of the
+ * constructed type and 'inf' should be set if it is indefinite length.
+ */
+
+#ifndef ASN1_MAX_STRING_NEST
+/*
+ * This determines how many levels of recursion are permitted in ASN1 string
+ * types. If it is not limited stack overflows can occur. If set to zero no
+ * recursion is allowed at all. Although zero should be adequate examples
+ * exist that require a value of 1. So 5 should be more than enough.
+ */
+# define ASN1_MAX_STRING_NEST 5
+#endif
+
+static int asn1_collect(BUF_MEM *buf, const unsigned char **in, long len,
+ char inf, int tag, int aclass, int depth)
+{
+ const unsigned char *p, *q;
+ long plen;
+ char cst, ininf;
+ p = *in;
+ inf &= 1;
+ /*
+ * If no buffer and not indefinite length constructed just pass over the
+ * encoded data
+ */
+ if (!buf && !inf) {
+ *in += len;
+ return 1;
+ }
+ while (len > 0) {
+ q = p;
+ /* Check for EOC */
+ if (asn1_check_eoc(&p, len)) {
+ /*
+ * EOC is illegal outside indefinite length constructed form
+ */
+ if (!inf) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNEXPECTED_EOC);
+ return 0;
+ }
+ inf = 0;
+ break;
+ }
+
+ if (!asn1_check_tlen(&plen, NULL, NULL, &ininf, &cst, &p,
+ len, tag, aclass, 0, NULL)) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR);
+ return 0;
+ }
+
+ /* If indefinite length constructed update max length */
+ if (cst) {
+ if (depth >= ASN1_MAX_STRING_NEST) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_STRING);
+ return 0;
+ }
+ if (!asn1_collect(buf, &p, plen, ininf, tag, aclass, depth + 1))
+ return 0;
+ } else if (plen && !collect_data(buf, &p, plen))
+ return 0;
+ len -= p - q;
+ }
+ if (inf) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_MISSING_EOC);
+ return 0;
+ }
+ *in = p;
+ return 1;
+}
+
+static int collect_data(BUF_MEM *buf, const unsigned char **p, long plen)
+{
+ int len;
+ if (buf) {
+ len = buf->length;
+ if (!BUF_MEM_grow_clean(buf, len + plen)) {
+ OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ OPENSSL_memcpy(buf->data + len, *p, plen);
+ }
+ *p += plen;
+ return 1;
+}
+
+/* Check for ASN1 EOC and swallow it if found */
+
+static int asn1_check_eoc(const unsigned char **in, long len)
+{
+ const unsigned char *p;
+ if (len < 2)
+ return 0;
+ p = *in;
+ if (!p[0] && !p[1]) {
+ *in += 2;
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Check an ASN1 tag and length: a bit like ASN1_get_object but it sets the
+ * length for indefinite length constructed form, we don't know the exact
+ * length but we can set an upper bound to the amount of data available minus
+ * the header length just read.
+ */
+
+static int asn1_check_tlen(long *olen, int *otag, unsigned char *oclass,
+ char *inf, char *cst,
+ const unsigned char **in, long len,
+ int exptag, int expclass, char opt, ASN1_TLC *ctx)
+{
+ int i;
+ int ptag, pclass;
+ long plen;
+ const unsigned char *p, *q;
+ p = *in;
+ q = p;
+
+ if (ctx && ctx->valid) {
+ i = ctx->ret;
+ plen = ctx->plen;
+ pclass = ctx->pclass;
+ ptag = ctx->ptag;
+ p += ctx->hdrlen;
+ } else {
+ i = ASN1_get_object(&p, &plen, &ptag, &pclass, len);
+ if (ctx) {
+ ctx->ret = i;
+ ctx->plen = plen;
+ ctx->pclass = pclass;
+ ctx->ptag = ptag;
+ ctx->hdrlen = p - q;
+ ctx->valid = 1;
+ /*
+ * If definite length, and no error, length + header can't exceed
+ * total amount of data available.
+ */
+ if (!(i & 0x81) && ((plen + ctx->hdrlen) > len)) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_TOO_LONG);
+ asn1_tlc_clear(ctx);
+ return 0;
+ }
+ }
+ }
+
+ if (i & 0x80) {
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_BAD_OBJECT_HEADER);
+ asn1_tlc_clear(ctx);
+ return 0;
+ }
+ if (exptag >= 0) {
+ if ((exptag != ptag) || (expclass != pclass)) {
+ /*
+ * If type is OPTIONAL, not an error: indicate missing type.
+ */
+ if (opt)
+ return -1;
+ asn1_tlc_clear(ctx);
+ OPENSSL_PUT_ERROR(ASN1, ASN1_R_WRONG_TAG);
+ return 0;
+ }
+ /*
+ * We have a tag and class match: assume we are going to do something
+ * with it
+ */
+ asn1_tlc_clear(ctx);
+ }
+
+ if (i & 1)
+ plen = len - (p - q);
+
+ if (inf)
+ *inf = i & 1;
+
+ if (cst)
+ *cst = i & V_ASN1_CONSTRUCTED;
+
+ if (olen)
+ *olen = plen;
+
+ if (oclass)
+ *oclass = pclass;
+
+ if (otag)
+ *otag = ptag;
+
+ *in = p;
+ return 1;
+}
git://repos.xcallymotion.com / motion2.git / blobdiff