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EVP_PKEY_asn1_get_count(3)          OpenSSL         EVP_PKEY_asn1_get_count(3)



NAME
       EVP_PKEY_asn1_find, EVP_PKEY_asn1_find_str, EVP_PKEY_asn1_get_count,
       EVP_PKEY_asn1_get0, EVP_PKEY_asn1_get0_info - enumerate public key
       ASN.1 methods

LIBRARY
       libcrypto, -lcrypto

SYNOPSIS
        #include <openssl/evp.h>

        int EVP_PKEY_asn1_get_count(void);
        const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_get0(int idx);
        const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find(ENGINE **pe, int type);
        const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find_str(ENGINE **pe,
                                                           const char *str, int len);
        int EVP_PKEY_asn1_get0_info(int *ppkey_id, int *pkey_base_id,
                                    int *ppkey_flags, const char **pinfo,
                                    const char **ppem_str,
                                    const EVP_PKEY_ASN1_METHOD *ameth);

DESCRIPTION
       EVP_PKEY_asn1_count() returns a count of the number of public key ASN.1
       methods available: it includes standard methods and any methods added
       by the application.

       EVP_PKEY_asn1_get0() returns the public key ASN.1 method idx.  The
       value of idx must be between zero and EVP_PKEY_asn1_get_count() - 1.

       EVP_PKEY_asn1_find() looks up the EVP_PKEY_ASN1_METHOD with NID type.
       If pe isn't NULL, then it will look up an engine implementing a
       EVP_PKEY_ASN1_METHOD for the NID type and return that instead, and also
       set *pe to point at the engine that implements it.

       EVP_PKEY_asn1_find_str() looks up the EVP_PKEY_ASN1_METHOD with PEM
       type string str.  Just like EVP_PKEY_asn1_find(), if pe isn't NULL,
       then it will look up an engine implementing a EVP_PKEY_ASN1_METHOD for
       the NID type and return that instead, and also set *pe to point at the
       engine that implements it.

       EVP_PKEY_asn1_get0_info() returns the public key ID, base public key ID
       (both NIDs), any flags, the method description and PEM type string
       associated with the public key ASN.1 method *ameth.

       EVP_PKEY_asn1_count(), EVP_PKEY_asn1_get0(), EVP_PKEY_asn1_find() and
       EVP_PKEY_asn1_find_str() are not thread safe, but as long as all
       EVP_PKEY_ASN1_METHOD objects are added before the application gets
       threaded, using them is safe.  See EVP_PKEY_asn1_add0(3).

RETURN VALUES
       EVP_PKEY_asn1_count() returns the number of available public key
       methods.

       EVP_PKEY_asn1_get0() return a public key method or NULL if idx is out
       of range.

       EVP_PKEY_asn1_get0_info() returns 0 on failure, 1 on success.

SEE ALSO
       EVP_PKEY_asn1_new(3), EVP_PKEY_asn1_add0(3)

COPYRIGHT
       Copyright 2017 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
       <https://www.openssl.org/source/license.html>.



3.0.12                            2023-05-07        EVP_PKEY_asn1_get_count(3)