1 /* 2 * Copyright 1999-2023 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (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 ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB); 23 return NULL; 24 } 25 } else { 26 octmp = *oct; 27 } 28 29 ASN1_STRING_set0(octmp, NULL, 0); 30 31 if ((octmp->length = ASN1_item_i2d(obj, &octmp->data, it)) <= 0) { 32 ERR_raise(ERR_LIB_ASN1, ASN1_R_ENCODE_ERROR); 33 goto err; 34 } 35 if (octmp->data == NULL) { 36 ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB); 37 goto err; 38 } 39 40 if (oct != NULL && *oct == NULL) 41 *oct = octmp; 42 43 return octmp; 44 err: 45 if (oct == NULL || *oct == NULL) 46 ASN1_STRING_free(octmp); 47 return NULL; 48 } 49 50 /* Extract an ASN1 object from an ASN1_STRING */ 51 52 void *ASN1_item_unpack(const ASN1_STRING *oct, const ASN1_ITEM *it) 53 { 54 const unsigned char *p; 55 void *ret; 56 57 p = oct->data; 58 if ((ret = ASN1_item_d2i(NULL, &p, oct->length, it)) == NULL) 59 ERR_raise(ERR_LIB_ASN1, ASN1_R_DECODE_ERROR); 60 return ret; 61 } 62 63 void *ASN1_item_unpack_ex(const ASN1_STRING *oct, const ASN1_ITEM *it, 64 OSSL_LIB_CTX *libctx, const char *propq) 65 { 66 const unsigned char *p; 67 void *ret; 68 69 p = oct->data; 70 if ((ret = ASN1_item_d2i_ex(NULL, &p, oct->length, it,\ 71 libctx, propq)) == NULL) 72 ERR_raise(ERR_LIB_ASN1, ASN1_R_DECODE_ERROR); 73 return ret; 74 } 75