=pod

=head1 NAME

DECLARE_ASN1_FUNCTIONS,
IMPLEMENT_ASN1_FUNCTIONS,
ASN1_ITEM,
ACCESS_DESCRIPTION_free,
ACCESS_DESCRIPTION_new,
ADMISSIONS_free,
ADMISSIONS_new,
ADMISSION_SYNTAX_free,
ADMISSION_SYNTAX_new,
ASIdOrRange_free,
ASIdOrRange_new,
ASIdentifierChoice_free,
ASIdentifierChoice_new,
ASIdentifiers_free,
ASIdentifiers_new,
ASRange_free,
ASRange_new,
AUTHORITY_INFO_ACCESS_free,
AUTHORITY_INFO_ACCESS_new,
AUTHORITY_KEYID_free,
AUTHORITY_KEYID_new,
BASIC_CONSTRAINTS_free,
BASIC_CONSTRAINTS_new,
CERTIFICATEPOLICIES_free,
CERTIFICATEPOLICIES_new,
CMS_ContentInfo_free,
CMS_ContentInfo_new,
CMS_ContentInfo_new_ex,
CMS_ContentInfo_print_ctx,
CMS_ReceiptRequest_free,
CMS_ReceiptRequest_new,
CRL_DIST_POINTS_free,
CRL_DIST_POINTS_new,
DIRECTORYSTRING_free,
DIRECTORYSTRING_new,
DISPLAYTEXT_free,
DISPLAYTEXT_new,
DIST_POINT_NAME_free,
DIST_POINT_NAME_new,
DIST_POINT_free,
DIST_POINT_new,
DSAparams_dup,
ECPARAMETERS_free,
ECPARAMETERS_new,
ECPKPARAMETERS_free,
ECPKPARAMETERS_new,
EDIPARTYNAME_free,
EDIPARTYNAME_new,
ESS_CERT_ID_dup,
ESS_CERT_ID_free,
ESS_CERT_ID_new,
ESS_CERT_ID_V2_dup,
ESS_CERT_ID_V2_free,
ESS_CERT_ID_V2_new,
ESS_ISSUER_SERIAL_dup,
ESS_ISSUER_SERIAL_free,
ESS_ISSUER_SERIAL_new,
ESS_SIGNING_CERT_dup,
ESS_SIGNING_CERT_free,
ESS_SIGNING_CERT_new,
ESS_SIGNING_CERT_V2_dup,
ESS_SIGNING_CERT_V2_free,
ESS_SIGNING_CERT_V2_new,
EXTENDED_KEY_USAGE_free,
EXTENDED_KEY_USAGE_new,
GENERAL_NAMES_free,
GENERAL_NAMES_new,
GENERAL_NAME_dup,
GENERAL_NAME_free,
GENERAL_NAME_new,
GENERAL_SUBTREE_free,
GENERAL_SUBTREE_new,
IPAddressChoice_free,
IPAddressChoice_new,
IPAddressFamily_free,
IPAddressFamily_new,
IPAddressOrRange_free,
IPAddressOrRange_new,
IPAddressRange_free,
IPAddressRange_new,
ISSUER_SIGN_TOOL_free,
ISSUER_SIGN_TOOL_it,
ISSUER_SIGN_TOOL_new,
ISSUING_DIST_POINT_free,
ISSUING_DIST_POINT_it,
ISSUING_DIST_POINT_new,
NAME_CONSTRAINTS_free,
NAME_CONSTRAINTS_new,
NAMING_AUTHORITY_free,
NAMING_AUTHORITY_new,
NETSCAPE_CERT_SEQUENCE_free,
NETSCAPE_CERT_SEQUENCE_new,
NETSCAPE_SPKAC_free,
NETSCAPE_SPKAC_new,
NETSCAPE_SPKI_free,
NETSCAPE_SPKI_new,
NOTICEREF_free,
NOTICEREF_new,
OCSP_BASICRESP_free,
OCSP_BASICRESP_new,
OCSP_CERTID_dup,
OCSP_CERTID_new,
OCSP_CERTSTATUS_free,
OCSP_CERTSTATUS_new,
OCSP_CRLID_free,
OCSP_CRLID_new,
OCSP_ONEREQ_free,
OCSP_ONEREQ_new,
OCSP_REQINFO_free,
OCSP_REQINFO_new,
OCSP_RESPBYTES_free,
OCSP_RESPBYTES_new,
OCSP_RESPDATA_free,
OCSP_RESPDATA_new,
OCSP_RESPID_free,
OCSP_RESPID_new,
OCSP_RESPONSE_new,
OCSP_REVOKEDINFO_free,
OCSP_REVOKEDINFO_new,
OCSP_SERVICELOC_free,
OCSP_SERVICELOC_new,
OCSP_SIGNATURE_free,
OCSP_SIGNATURE_new,
OCSP_SINGLERESP_free,
OCSP_SINGLERESP_new,
OSSL_CMP_ITAV_dup,
OSSL_CMP_ITAV_free,
OSSL_CMP_MSG_dup,
OSSL_CMP_MSG_it,
OSSL_CMP_MSG_free,
OSSL_CMP_PKIHEADER_free,
OSSL_CMP_PKIHEADER_it,
OSSL_CMP_PKIHEADER_new,
OSSL_CMP_PKISI_dup,
OSSL_CMP_PKISI_free,
OSSL_CMP_PKISI_it,
OSSL_CMP_PKISI_new,
OSSL_CMP_PKISTATUS_it,
OSSL_CRMF_CERTID_dup,
OSSL_CRMF_CERTID_free,
OSSL_CRMF_CERTID_it,
OSSL_CRMF_CERTID_new,
OSSL_CRMF_CERTTEMPLATE_free,
OSSL_CRMF_CERTTEMPLATE_it,
OSSL_CRMF_CERTTEMPLATE_new,
OSSL_CRMF_ENCRYPTEDVALUE_free,
OSSL_CRMF_ENCRYPTEDVALUE_it,
OSSL_CRMF_ENCRYPTEDVALUE_new,
OSSL_CRMF_MSGS_free,
OSSL_CRMF_MSGS_it,
OSSL_CRMF_MSGS_new,
OSSL_CRMF_MSG_dup,
OSSL_CRMF_MSG_free,
OSSL_CRMF_MSG_it,
OSSL_CRMF_MSG_new,
OSSL_CRMF_PBMPARAMETER_free,
OSSL_CRMF_PBMPARAMETER_it,
OSSL_CRMF_PBMPARAMETER_new,
OSSL_CRMF_PKIPUBLICATIONINFO_free,
OSSL_CRMF_PKIPUBLICATIONINFO_it,
OSSL_CRMF_PKIPUBLICATIONINFO_new,
OSSL_CRMF_SINGLEPUBINFO_free,
OSSL_CRMF_SINGLEPUBINFO_it,
OSSL_CRMF_SINGLEPUBINFO_new,
OTHERNAME_free,
OTHERNAME_new,
PBE2PARAM_free,
PBE2PARAM_new,
PBEPARAM_free,
PBEPARAM_new,
PBKDF2PARAM_free,
PBKDF2PARAM_new,
PKCS12_BAGS_free,
PKCS12_BAGS_new,
PKCS12_MAC_DATA_free,
PKCS12_MAC_DATA_new,
PKCS12_SAFEBAG_free,
PKCS12_SAFEBAG_new,
PKCS12_free,
PKCS12_new,
PKCS7_DIGEST_free,
PKCS7_DIGEST_new,
PKCS7_ENCRYPT_free,
PKCS7_ENCRYPT_new,
PKCS7_ENC_CONTENT_free,
PKCS7_ENC_CONTENT_new,
PKCS7_ENVELOPE_free,
PKCS7_ENVELOPE_new,
PKCS7_ISSUER_AND_SERIAL_free,
PKCS7_ISSUER_AND_SERIAL_new,
PKCS7_RECIP_INFO_free,
PKCS7_RECIP_INFO_new,
PKCS7_SIGNED_free,
PKCS7_SIGNED_new,
PKCS7_SIGNER_INFO_free,
PKCS7_SIGNER_INFO_new,
PKCS7_SIGN_ENVELOPE_free,
PKCS7_SIGN_ENVELOPE_new,
PKCS7_dup,
PKCS7_free,
PKCS7_new_ex,
PKCS7_new,
PKCS7_print_ctx,
PKCS8_PRIV_KEY_INFO_free,
PKCS8_PRIV_KEY_INFO_new,
PKEY_USAGE_PERIOD_free,
PKEY_USAGE_PERIOD_new,
POLICYINFO_free,
POLICYINFO_new,
POLICYQUALINFO_free,
POLICYQUALINFO_new,
POLICY_CONSTRAINTS_free,
POLICY_CONSTRAINTS_new,
POLICY_MAPPING_free,
POLICY_MAPPING_new,
PROFESSION_INFOS_free,
PROFESSION_INFOS_new,
PROFESSION_INFO_free,
PROFESSION_INFO_new,
PROXY_CERT_INFO_EXTENSION_free,
PROXY_CERT_INFO_EXTENSION_new,
PROXY_POLICY_free,
PROXY_POLICY_new,
RSAPrivateKey_dup,
RSAPublicKey_dup,
RSA_OAEP_PARAMS_free,
RSA_OAEP_PARAMS_new,
RSA_PSS_PARAMS_free,
RSA_PSS_PARAMS_new,
RSA_PSS_PARAMS_dup,
SCRYPT_PARAMS_free,
SCRYPT_PARAMS_new,
SXNETID_free,
SXNETID_new,
SXNET_free,
SXNET_new,
TLS_FEATURE_free,
TLS_FEATURE_new,
TS_ACCURACY_dup,
TS_ACCURACY_free,
TS_ACCURACY_new,
TS_MSG_IMPRINT_dup,
TS_MSG_IMPRINT_free,
TS_MSG_IMPRINT_new,
TS_REQ_dup,
TS_REQ_free,
TS_REQ_new,
TS_RESP_dup,
TS_RESP_free,
TS_RESP_new,
TS_STATUS_INFO_dup,
TS_STATUS_INFO_free,
TS_STATUS_INFO_new,
TS_TST_INFO_dup,
TS_TST_INFO_free,
TS_TST_INFO_new,
USERNOTICE_free,
USERNOTICE_new,
X509_ALGOR_free,
X509_ALGOR_it,
X509_ALGOR_new,
X509_ATTRIBUTE_dup,
X509_ATTRIBUTE_free,
X509_ATTRIBUTE_new,
X509_CERT_AUX_free,
X509_CERT_AUX_new,
X509_CINF_free,
X509_CINF_new,
X509_CRL_INFO_free,
X509_CRL_INFO_new,
X509_CRL_dup,
X509_CRL_free,
X509_CRL_new,
X509_EXTENSION_dup,
X509_EXTENSION_free,
X509_EXTENSION_new,
X509_NAME_ENTRY_dup,
X509_NAME_ENTRY_free,
X509_NAME_ENTRY_new,
X509_NAME_dup,
X509_NAME_free,
X509_NAME_new,
X509_REQ_INFO_free,
X509_REQ_INFO_new,
X509_REQ_dup,
X509_REQ_free,
X509_REQ_new,
X509_REQ_new_ex,
X509_REVOKED_dup,
X509_REVOKED_free,
X509_REVOKED_new,
X509_SIG_free,
X509_SIG_new,
X509_VAL_free,
X509_VAL_new,
X509_dup,
- ASN1 object utilities

=head1 SYNOPSIS

=for openssl generic

 #include <openssl/asn1t.h>

 DECLARE_ASN1_FUNCTIONS(type)
 IMPLEMENT_ASN1_FUNCTIONS(stname)

 typedef struct ASN1_ITEM_st ASN1_ITEM;

 extern const ASN1_ITEM TYPE_it;
 TYPE *TYPE_new(void);
 TYPE *TYPE_dup(const TYPE *a);
 void TYPE_free(TYPE *a);
 int TYPE_print_ctx(BIO *out, TYPE *a, int indent, const ASN1_PCTX *pctx);

Deprecated since OpenSSL 3.0, can be hidden entirely by defining
B<OPENSSL_API_COMPAT> with a suitable version value, see
L<openssl_user_macros(7)>:

 DSA *DSAparams_dup(const DSA *dsa);
 RSA *RSAPrivateKey_dup(const RSA *rsa);
 RSA *RSAPublicKey_dup(const RSA *rsa);

=head1 DESCRIPTION

In the description below, B<I<TYPE>> is used
as a placeholder for any of the OpenSSL datatypes, such as B<X509>.

The OpenSSL ASN1 parsing library templates are like a data-driven bytecode
interpreter.
Every ASN1 object as a global variable, TYPE_it, that describes the item
such as its fields.  (On systems which cannot export variables from shared
libraries, the global is instead a function which returns a pointer to a
static variable.

The macro DECLARE_ASN1_FUNCTIONS() is typically used in header files
to generate the function declarations.

The macro IMPLEMENT_ASN1_FUNCTIONS() is used once in a source file
to generate the function bodies.


B<I<TYPE>_new>() allocates an empty object of the indicated type.
The object returned must be released by calling B<I<TYPE>_free>().

B<I<TYPE>_new_ex>() is similiar to B<I<TYPE>_new>() but also passes the
library context I<libctx> and the property query I<propq> to use when retrieving
algorithms from providers.

B<I<TYPE>_dup>() copies an existing object, leaving it untouched.

B<I<TYPE>_free>() releases the object and all pointers and sub-objects
within it.

B<I<TYPE>_print_ctx>() prints the object I<a> on the specified BIO I<out>.
Each line will be prefixed with I<indent> spaces.
The I<pctx> specifies the printing context and is for internal
use; use NULL to get the default behavior.  If a print function is
user-defined, then pass in any I<pctx> down to any nested calls.

=head1 RETURN VALUES

B<I<TYPE>_new>(), B<I<TYPE>_new_ex>() and B<I<TYPE>_dup>() return a pointer to
the object or NULL on failure.

B<I<TYPE>_print_ctx>() returns 1 on success or zero on failure.

=head1 HISTORY

The functions PKCS7_new_ex() and CMS_ContentInfo_new_ex() were
added in OpenSSL 3.0.

The functions DSAparams_dup(), RSAPrivateKey_dup() and RSAPublicKey_dup() were
deprecated in 3.0.

=head1 COPYRIGHT

Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the "License").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.

=cut
