1 /* 2 * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include <stdio.h> 11 #include "internal/cryptlib.h" 12 #include <openssl/asn1.h> 13 14 /* ASN1 packing and unpacking functions */ 15 16 ASN1_STRING *ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct) 17 { 18 ASN1_STRING *octmp; 19 20 if (oct == NULL || *oct == NULL) { 21 if ((octmp = ASN1_STRING_new()) == NULL) { 22 ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE); 23 return NULL; 24 } 25 } else { 26 octmp = *oct; 27 } 28 29 OPENSSL_free(octmp->data); 30 octmp->data = NULL; 31 32 if ((octmp->length = ASN1_item_i2d(obj, &octmp->data, it)) == 0) { 33 ASN1err(ASN1_F_ASN1_ITEM_PACK, ASN1_R_ENCODE_ERROR); 34 goto err; 35 } 36 if (octmp->data == NULL) { 37 ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE); 38 goto err; 39 } 40 41 if (oct != NULL && *oct == NULL) 42 *oct = octmp; 43 44 return octmp; 45 err: 46 if (oct == NULL || *oct == NULL) 47 ASN1_STRING_free(octmp); 48 return NULL; 49 } 50 51 /* Extract an ASN1 object from an ASN1_STRING */ 52 53 void *ASN1_item_unpack(const ASN1_STRING *oct, const ASN1_ITEM *it) 54 { 55 const unsigned char *p; 56 void *ret; 57 58 p = oct->data; 59 if ((ret = ASN1_item_d2i(NULL, &p, oct->length, it)) == NULL) 60 ASN1err(ASN1_F_ASN1_ITEM_UNPACK, ASN1_R_DECODE_ERROR); 61 return ret; 62 } 63