.\" $OpenBSD: EVP_PKEY_asn1_get_count.3,v 1.5 2020/06/24 19:55:54 schwarze Exp $ .\" full merge up to: OpenSSL 72a7a702 Feb 26 14:05:09 2019 +0000 .\" .\" This file is a derived work. .\" The changes are covered by the following Copyright and license: .\" .\" Copyright (c) 2020 Ingo Schwarze .\" .\" Permission to use, copy, modify, and distribute this software for any .\" purpose with or without fee is hereby granted, provided that the above .\" copyright notice and this permission notice appear in all copies. .\" .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS. 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All advertising materials mentioning features or use of this .\" software must display the following acknowledgment: .\" "This product includes software developed by the OpenSSL Project .\" for use in the OpenSSL Toolkit. (http://www.openssl.org/)" .\" .\" 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to .\" endorse or promote products derived from this software without .\" prior written permission. For written permission, please contact .\" openssl-core@openssl.org. .\" .\" 5. Products derived from this software may not be called "OpenSSL" .\" nor may "OpenSSL" appear in their names without prior written .\" permission of the OpenSSL Project. .\" .\" 6. Redistributions of any form whatsoever must retain the following .\" acknowledgment: .\" "This product includes software developed by the OpenSSL Project .\" for use in the OpenSSL Toolkit (http://www.openssl.org/)" .\" .\" THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY .\" EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR .\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR .\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, .\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; .\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, .\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED .\" OF THE POSSIBILITY OF SUCH DAMAGE. .\" .Dd $Mdocdate: June 24 2020 $ .Dt EVP_PKEY_ASN1_GET_COUNT 3 .Os .Sh NAME .Nm EVP_PKEY_asn1_get_count , .Nm EVP_PKEY_asn1_get0 , .Nm EVP_PKEY_get0_asn1 , .Nm EVP_PKEY_asn1_find , .Nm EVP_PKEY_asn1_find_str , .Nm EVP_PKEY_asn1_get0_info .Nd enumerate public key ASN.1 methods .Sh SYNOPSIS .In openssl/evp.h .Ft int .Fn EVP_PKEY_asn1_get_count void .Ft const EVP_PKEY_ASN1_METHOD * .Fo EVP_PKEY_asn1_get0 .Fa "int idx" .Fc .Ft const EVP_PKEY_ASN1_METHOD * .Fo EVP_PKEY_get0_asn1 .Fa "const EVP_PKEY *pkey" .Fc .Ft const EVP_PKEY_ASN1_METHOD * .Fo EVP_PKEY_asn1_find .Fa "ENGINE **pe" .Fa "int type" .Fc .Ft const EVP_PKEY_ASN1_METHOD * .Fo EVP_PKEY_asn1_find_str .Fa "ENGINE **pe" .Fa "const char *str" .Fa "int len" .Fc .Ft int .Fo EVP_PKEY_asn1_get0_info .Fa "int *ppkey_id" .Fa "int *pkey_base_id" .Fa "int *ppkey_flags" .Fa "const char **pinfo" .Fa "const char **ppem_str" .Fa "const EVP_PKEY_ASN1_METHOD *ameth" .Fc .Sh DESCRIPTION .Fn EVP_PKEY_asn1_get_count returns the number of public key ASN.1 methods available. It includes standard methods and any methods added by the application. .Pp .Fn EVP_PKEY_asn1_get0 returns the public key ASN.1 method .Fa idx . The value of .Fa idx must be in the range from zero to .Fn EVP_PKEY_asn1_get_count \- 1. .Pp .Fn EVP_PKEY_asn1_find looks up the method with NID .Fa type , which can be any of the values that .Xr EVP_PKEY_base_id 3 and .Xr EVP_PKEY_id 3 may return. If .Fa pe is not .Dv NULL , it first looks for an engine implementing a method for the NID .Fa type . If one is found, .Pf * Fa pe is set to that engine and the method from that engine is returned instead. .Pp .Fn EVP_PKEY_asn1_find_str looks up the method with PEM type string .Fa str . The PEM type strings supported by default are listed in the .Xr EVP_PKEY_base_id 3 manual page. Just like .Fn EVP_PKEY_asn1_find , if .Fa pe is not .Dv NULL , methods from engines are preferred. .Pp .Fn EVP_PKEY_asn1_get0_info retrieves the public key ID as returned by .Xr EVP_PKEY_id 3 , the base public key ID as returned by .Xr EVP_PKEY_base_id 3 .Pq both NIDs , any flags, the method description, and the PEM type string associated with .Fa ameth . .Pp .Fn EVP_PKEY_asn1_get_count , .Fn EVP_PKEY_asn1_get0 , .Fn EVP_PKEY_asn1_find and .Fn EVP_PKEY_asn1_find_str are not thread safe, but as long as all .Vt EVP_PKEY_ASN1_METHOD objects are added before the application gets threaded, using them is safe. See .Xr EVP_PKEY_asn1_add0 3 . .Sh RETURN VALUES .Fn EVP_PKEY_asn1_get_count returns the number of available public key methods. .Pp .Fn EVP_PKEY_asn1_get0 returns a public key method or .Dv NULL if .Fa idx is out of range. .Pp .Fn EVP_PKEY_get0_asn1 returns the public key method used by .Fa pkey . .Pp .Fn EVP_PKEY_asn1_get0_info returns 1 on success or 0 on failure. .Sh SEE ALSO .Xr EVP_PKEY_asn1_new 3 , .Xr EVP_PKEY_base_id 3 , .Xr EVP_PKEY_new 3 .Sh HISTORY These functions first appeared in OpenSSL 1.0.0 and have been available since .Ox 4.9 .