/* Copyright (C) 1995-1998 Eric Young ([email protected]) * All rights reserved. * * This package is an SSL implementation written * by Eric Young ([email protected]). * 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 ([email protected]). * * 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 ([email protected])" * 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 ([email protected])" * * 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 <assert.h> #include <limits.h> #include <string.h> #include <openssl/asn1t.h> #include <openssl/mem.h> #include "../internal.h" #include "internal.h" static int asn1_item_ex_i2d_opt(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass, int optional); static int asn1_i2d_ex_primitive(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass, int optional); static int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cont, int *out_omit, int *putype, const ASN1_ITEM *it); static int asn1_set_seq_out(STACK_OF(ASN1_VALUE) *sk, unsigned char **out, int skcontlen, const ASN1_ITEM *item, int do_sort); static int asn1_template_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_TEMPLATE *tt, int tag, int aclass, int optional); // Top level i2d equivalents int ASN1_item_i2d(ASN1_VALUE *val, unsigned char **out, const ASN1_ITEM *it) { … } // Encode an item, taking care of IMPLICIT tagging (if any). This function // performs the normal item handling: it can be used in external types. int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass) { … } // asn1_item_ex_i2d_opt behaves like |ASN1_item_ex_i2d| but, if |optional| is // non-zero and |*pval| is omitted, it returns zero and writes no bytes. int asn1_item_ex_i2d_opt(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass, int optional) { … } // asn1_template_ex_i2d behaves like |asn1_item_ex_i2d_opt| but uses an // |ASN1_TEMPLATE| instead of an |ASN1_ITEM|. An |ASN1_TEMPLATE| wraps an // |ASN1_ITEM| with modifiers such as tagging, SEQUENCE or SET, etc. static int asn1_template_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_TEMPLATE *tt, int tag, int iclass, int optional) { … } // Temporary structure used to hold DER encoding of items for SET OF DER_ENC; static int der_cmp(const void *a, const void *b) { … } // asn1_set_seq_out writes |sk| to |out| under the i2d output convention, // excluding the tag and length. It returns one on success and zero on error. // |skcontlen| must be the total encoded size. If |do_sort| is non-zero, the // elements are sorted for a SET OF type. Each element of |sk| has type // |item|. static int asn1_set_seq_out(STACK_OF(ASN1_VALUE) *sk, unsigned char **out, int skcontlen, const ASN1_ITEM *item, int do_sort) { … } // asn1_i2d_ex_primitive behaves like |ASN1_item_ex_i2d| but |item| must be a // a PRIMITIVE or MSTRING type that is not an |ASN1_ITEM_TEMPLATE|. static int asn1_i2d_ex_primitive(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass, int optional) { … } // asn1_ex_i2c writes the |*pval| to |cout| under the i2d output convention, // excluding the tag and length. It returns the number of bytes written, // possibly zero, on success or -1 on error. If |*pval| should be omitted, it // returns zero and sets |*out_omit| to true. // // If |it| is an MSTRING or ANY type, it gets the underlying type from |*pval|, // which must be an |ASN1_STRING| or |ASN1_TYPE|, respectively. It then updates // |*putype| with the tag number of type used, or |V_ASN1_OTHER| if it was not a // universal type. If |*putype| is set to |V_ASN1_SEQUENCE|, |V_ASN1_SET|, or // |V_ASN1_OTHER|, it additionally outputs the tag and length, so the caller // must not do so. // // Otherwise, |*putype| must contain |it->utype|. // // WARNING: Unlike most functions in this file, |asn1_ex_i2c| can return zero // without omitting the element. ASN.1 values may have empty contents. static int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cout, int *out_omit, int *putype, const ASN1_ITEM *it) { … }
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