/* asn_pack.c */ /* * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project * 1999. */ /* ==================================================================== * Copyright (c) 1999 The OpenSSL Project. All rights reserved. * * 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 above 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 acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * licensing@OpenSSL.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED 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 OpenSSL PROJECT OR * ITS 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. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ #include <stdio.h> #include "cryptlib.h" #include <openssl/asn1.h> #ifndef NO_ASN1_OLD /* ASN1 packing and unpacking functions */ /* Turn an ASN1 encoded SEQUENCE OF into a STACK of structures */ STACK_OF(OPENSSL_BLOCK) *ASN1_seq_unpack(const unsigned char *buf, int len, d2i_of_void *d2i, void (*free_func) (OPENSSL_BLOCK)) { STACK_OF(OPENSSL_BLOCK) *sk; const unsigned char *pbuf; pbuf = buf; if (!(sk = d2i_ASN1_SET(NULL, &pbuf, len, d2i, free_func, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL))) ASN1err(ASN1_F_ASN1_SEQ_UNPACK, ASN1_R_DECODE_ERROR); return sk; } /* * Turn a STACK structures into an ASN1 encoded SEQUENCE OF structure in a * OPENSSL_malloc'ed buffer */ unsigned char *ASN1_seq_pack(STACK_OF(OPENSSL_BLOCK) *safes, i2d_of_void *i2d, unsigned char **buf, int *len) { int safelen; unsigned char *safe, *p; if (!(safelen = i2d_ASN1_SET(safes, NULL, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, IS_SEQUENCE))) { ASN1err(ASN1_F_ASN1_SEQ_PACK, ASN1_R_ENCODE_ERROR); return NULL; } if (!(safe = OPENSSL_malloc(safelen))) { ASN1err(ASN1_F_ASN1_SEQ_PACK, ERR_R_MALLOC_FAILURE); return NULL; } p = safe; i2d_ASN1_SET(safes, &p, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, IS_SEQUENCE); if (len) *len = safelen; if (buf) *buf = safe; return safe; } /* Extract an ASN1 object from an ASN1_STRING */ void *ASN1_unpack_string(ASN1_STRING *oct, d2i_of_void *d2i) { const unsigned char *p; char *ret; p = oct->data; if (!(ret = d2i(NULL, &p, oct->length))) ASN1err(ASN1_F_ASN1_UNPACK_STRING, ASN1_R_DECODE_ERROR); return ret; } /* Pack an ASN1 object into an ASN1_STRING */ ASN1_STRING *ASN1_pack_string(void *obj, i2d_of_void *i2d, ASN1_STRING **oct) { unsigned char *p; ASN1_STRING *octmp; if (!oct || !*oct) { if (!(octmp = ASN1_STRING_new())) { ASN1err(ASN1_F_ASN1_PACK_STRING, ERR_R_MALLOC_FAILURE); return NULL; } if (oct) *oct = octmp; } else octmp = *oct; if (!(octmp->length = i2d(obj, NULL))) { ASN1err(ASN1_F_ASN1_PACK_STRING, ASN1_R_ENCODE_ERROR); goto err; } if (!(p = OPENSSL_malloc(octmp->length))) { ASN1err(ASN1_F_ASN1_PACK_STRING, ERR_R_MALLOC_FAILURE); goto err; } octmp->data = p; i2d(obj, &p); return octmp; err: if (!oct || !*oct) { ASN1_STRING_free(octmp); if (oct) *oct = NULL; } return NULL; } #endif /* ASN1_ITEM versions of the above */ ASN1_STRING *ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct) { ASN1_STRING *octmp; if (!oct || !*oct) { if (!(octmp = ASN1_STRING_new())) { ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE); return NULL; } if (oct) *oct = octmp; } else octmp = *oct; if (octmp->data) { OPENSSL_free(octmp->data); octmp->data = NULL; } if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) { ASN1err(ASN1_F_ASN1_ITEM_PACK, ASN1_R_ENCODE_ERROR); return NULL; } if (!octmp->data) { ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE); return NULL; } return octmp; } /* Extract an ASN1 object from an ASN1_STRING */ void *ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it) { const unsigned char *p; void *ret; p = oct->data; if (!(ret = ASN1_item_d2i(NULL, &p, oct->length, it))) ASN1err(ASN1_F_ASN1_ITEM_UNPACK, ASN1_R_DECODE_ERROR); return ret; }