Decode an ASN.1 value described by it from a FILE, with library context.

Synopsis

Declared in <openssl/asn1.h>

void*
ASN1_item_d2i_fp_ex(
    ASN1_ITEM const* it,
    FILE* in,
    void* x,
    OSSL_LIB_CTX* libctx,
    char const* propq);

Return Value

Decoded object pointer, or NULL on error.

Parameters

Name

Description

it

ASN.1 item describing the type to decode.

in

Open FILE positioned at DER input.

x

Optional existing object to reuse, or NULL to allocate.

libctx

Library context for algorithm fetches during decode, or NULL for the default.

propq

Property query for algorithm fetches, or NULL.

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