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+.\" ========================================================================
+.\"
+.IX Title "EVP_PKEY_ASN1_GET_COUNT 3"
+.TH EVP_PKEY_ASN1_GET_COUNT 3 "2019-09-10" "1.1.1d" "OpenSSL"
+.\" For nroff, turn off justification. Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH "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
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+.Vb 1
+\& #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);
+.Ve
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+\&\fBEVP_PKEY_asn1_count()\fR returns a count of the number of public key
+\&\s-1ASN.1\s0 methods available: it includes standard methods and any methods
+added by the application.
+.PP
+\&\fBEVP_PKEY_asn1_get0()\fR returns the public key \s-1ASN.1\s0 method \fBidx\fR.
+The value of \fBidx\fR must be between zero and \fBEVP_PKEY_asn1_get_count()\fR
+\&\- 1.
+.PP
+\&\fBEVP_PKEY_asn1_find()\fR looks up the \fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR with \s-1NID\s0
+\&\fBtype\fR.
+If \fBpe\fR isn't \fB\s-1NULL\s0\fR, then it will look up an engine implementing a
+\&\fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR for the \s-1NID\s0 \fBtype\fR and return that instead,
+and also set \fB*pe\fR to point at the engine that implements it.
+.PP
+\&\fBEVP_PKEY_asn1_find_str()\fR looks up the \fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR with \s-1PEM\s0
+type string \fBstr\fR.
+Just like \fBEVP_PKEY_asn1_find()\fR, if \fBpe\fR isn't \fB\s-1NULL\s0\fR, then it will
+look up an engine implementing a \fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR for the \s-1NID\s0
+\&\fBtype\fR and return that instead, and also set \fB*pe\fR to point at the
+engine that implements it.
+.PP
+\&\fBEVP_PKEY_asn1_get0_info()\fR returns the public key \s-1ID,\s0 base public key
+\&\s-1ID\s0 (both NIDs), any flags, the method description and \s-1PEM\s0 type string
+associated with the public key \s-1ASN.1\s0 method \fB*ameth\fR.
+.PP
+\&\fBEVP_PKEY_asn1_count()\fR, \fBEVP_PKEY_asn1_get0()\fR, \fBEVP_PKEY_asn1_find()\fR and
+\&\fBEVP_PKEY_asn1_find_str()\fR are not thread safe, but as long as all
+\&\fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR objects are added before the application gets
+threaded, using them is safe. See \fBEVP_PKEY_asn1_add0\fR\|(3).
+.SH "RETURN VALUES"
+.IX Header "RETURN VALUES"
+\&\fBEVP_PKEY_asn1_count()\fR returns the number of available public key methods.
+.PP
+\&\fBEVP_PKEY_asn1_get0()\fR return a public key method or \fB\s-1NULL\s0\fR if \fBidx\fR is
+out of range.
+.PP
+\&\fBEVP_PKEY_asn1_get0_info()\fR returns 0 on failure, 1 on success.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+\&\fBEVP_PKEY_asn1_new\fR\|(3), \fBEVP_PKEY_asn1_add0\fR\|(3)
+.SH "COPYRIGHT"
+.IX Header "COPYRIGHT"
+Copyright 2017\-2019 The OpenSSL Project Authors. All Rights Reserved.
+.PP
+Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
+this file except in compliance with the License. You can obtain a copy
+in the file \s-1LICENSE\s0 in the source distribution or at
+<https://www.openssl.org/source/license.html>.
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