190 lines
6.3 KiB
Groff
Executable File
190 lines
6.3 KiB
Groff
Executable File
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.\" ========================================================================
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.\"
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.IX Title "EVP_PKEY_FROMDATA 3"
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.TH EVP_PKEY_FROMDATA 3 "2020-03-02" "3.0.0-dev" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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EVP_PKEY_param_fromdata_init, EVP_PKEY_key_fromdata_init, EVP_PKEY_fromdata,
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EVP_PKEY_param_fromdata_settable, EVP_PKEY_key_fromdata_settable
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\&\- functions to create key parameters and keys from user data
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/evp.h>
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\&
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\& int EVP_PKEY_param_fromdata_init(EVP_PKEY_CTX *ctx);
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\& int EVP_PKEY_key_fromdata_init(EVP_PKEY_CTX *ctx);
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\& int EVP_PKEY_fromdata(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey, OSSL_PARAM params[]);
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\& const OSSL_PARAM *EVP_PKEY_param_fromdata_settable(EVP_PKEY_CTX *ctx);
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\& const OSSL_PARAM *EVP_PKEY_key_fromdata_settable(EVP_PKEY_CTX *ctx);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fIEVP_PKEY_param_fromdata_init()\fR initializes a public key algorithm context
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for creating key parameters from user data.
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.PP
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\&\fIEVP_PKEY_key_fromdata_init()\fR initializes a public key algorithm context for
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creating a key from user data.
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.PP
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\&\fIEVP_PKEY_fromdata()\fR creates key parameters or a key, given data from
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\&\fIparams\fR and a context that's been initialized with
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\&\fIEVP_PKEY_param_fromdata_init()\fR or \fIEVP_PKEY_key_fromdata_init()\fR. The result is
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written to \fI*ppkey\fR. The parameters that can be used for various types of key
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are as described in the \*(L"Built-in \s-1RSA\s0 Import/Export Types\*(R" section on the
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\&\fIprovider\-keymgmt\fR\|(7) page.
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.PP
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\&\fIEVP_PKEY_param_fromdata_settable()\fR and \fIEVP_PKEY_key_fromdata_settable()\fR
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get a constant \fB\s-1OSSL_PARAM\s0\fR array that describes the settable parameters
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that can be used with \fIEVP_PKEY_fromdata()\fR.
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See \s-1\fIOSSL_PARAM\s0\fR\|(3) for the use of \fB\s-1OSSL_PARAM\s0\fR as parameter descriptor.
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.SH "NOTES"
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.IX Header "NOTES"
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These functions only work with key management methods coming from a
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provider.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fIEVP_PKEY_key_fromdata_init()\fR, \fIEVP_PKEY_param_fromdata_init()\fR and
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\&\fIEVP_PKEY_fromdata()\fR return 1 for success and 0 or a negative value for
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failure. In particular a return value of \-2 indicates the operation is
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not supported by the public key algorithm.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIEVP_PKEY_CTX_new\fR\|(3), \fIprovider\fR\|(7)
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.SH "HISTORY"
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.IX Header "HISTORY"
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These functions were added in OpenSSL 3.0.
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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