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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" OSSL_PARAM_dup, OSSL_PARAM_merge, OSSL_PARAM_free \&\- OSSL_PARAM array copy functions .SH "LIBRARY" libcrypto, -lcrypto .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include \& \& OSSL_PARAM *OSSL_PARAM_dup(const OSSL_PARAM *params); \& OSSL_PARAM *OSSL_PARAM_merge(const OSSL_PARAM *params, const OSSL_PARAM *params1); \& void OSSL_PARAM_free(OSSL_PARAM *params); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" Algorithm parameters can be exported/imported from/to providers using arrays of \&\s-1\fBOSSL_PARAM\s0\fR\|(3). The following utility functions allow the parameters to be duplicated and merged with other \s-1\fBOSSL_PARAM\s0\fR\|(3) to assist in this process. .PP \&\fBOSSL_PARAM_dup()\fR duplicates the parameter array \fIparams\fR. This function does a deep copy of the data. .PP \&\fBOSSL_PARAM_merge()\fR merges the parameter arrays \fIparams\fR and \fIparams1\fR into a new parameter array. If \fIparams\fR and \fIparams1\fR contain values with the same \&'key' then the value from \fIparams1\fR will replace the \fIparam\fR value. This function does a shallow copy of the parameters. Either \fIparams\fR or \fIparams1\fR may be \s-1NULL.\s0 The behaviour of the merge is unpredictable if \fIparams\fR and \&\fIparams1\fR contain the same key, and there are multiple entries within either array that have the same key. .PP \&\fBOSSL_PARAM_free()\fR frees the parameter array \fIparams\fR that was created using \&\fBOSSL_PARAM_dup()\fR, \fBOSSL_PARAM_merge()\fR or \fBOSSL_PARAM_BLD_to_param()\fR. .SH "RETURN VALUES" .IX Header "RETURN VALUES" The functions \fBOSSL_PARAM_dup()\fR and \fBOSSL_PARAM_merge()\fR return a newly allocated \&\s-1\fBOSSL_PARAM\s0\fR\|(3) array, or \s-1NULL\s0 if there was an error. If both parameters are \s-1NULL\s0 then \s-1NULL\s0 is returned. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\s-1\fBOSSL_PARAM\s0\fR\|(3), \s-1\fBOSSL_PARAM_BLD\s0\fR\|(3) .SH "HISTORY" .IX Header "HISTORY" The functions were added in OpenSSL 3.0. .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2021 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the Apache License 2.0 (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 .