195 lines
6.3 KiB
Groff
Executable File
195 lines
6.3 KiB
Groff
Executable File
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.\" ========================================================================
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.\"
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.IX Title "EVP_PKEY_CHECK 3"
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.TH EVP_PKEY_CHECK 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_check, EVP_PKEY_param_check, EVP_PKEY_public_check,
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EVP_PKEY_private_check, EVP_PKEY_pairwise_check
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\&\- key and parameter validation functions
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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_check(EVP_PKEY_CTX *ctx);
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\& int EVP_PKEY_param_check(EVP_PKEY_CTX *ctx);
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\& int EVP_PKEY_public_check(EVP_PKEY_CTX *ctx);
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\& int EVP_PKEY_private_check(EVP_PKEY_CTX *ctx);
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\& int EVP_PKEY_pairwise_check(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_check()\fR validates the parameters component of the key
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given by \fBctx\fR.
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.PP
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\&\fIEVP_PKEY_public_check()\fR validates the public component of the key given by \fBctx\fR.
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.PP
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\&\fIEVP_PKEY_private_check()\fR validates the private component of the key given by \fBctx\fR.
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.PP
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\&\fIEVP_PKEY_pairwise_check()\fR validates that the public and private components have
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the correct mathematical relationship to each other for the key given by \fBctx\fR.
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.PP
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\&\fIEVP_PKEY_check()\fR validates all components of a key given by \fBctx\fR.
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.SH "NOTES"
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.IX Header "NOTES"
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Refer to \s-1SP800\-56A\s0 and \s-1SP800\-56B\s0 for rules relating to when these functions
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should be called during key establishment.
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It is not necessary to call these functions after locally calling an approved key
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generation method, but may be required for assurance purposes when receiving
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keys from a third party.
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.PP
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In OpenSSL an \s-1EVP_PKEY\s0 structure containing a private key also contains the
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public key components and parameters (if any). An OpenSSL private key is
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equivalent to what some libraries call a \*(L"key pair\*(R". A private key can be used
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in functions which require the use of a public key or parameters.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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All functions return 1 for success or others for failure.
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They return \-2 if the operation is not supported for the specific 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),
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\&\fIEVP_PKEY_fromdata\fR\|(3),
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.SH "HISTORY"
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.IX Header "HISTORY"
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\&\fIEVP_PKEY_check()\fR, \fIEVP_PKEY_public_check()\fR and \fIEVP_PKEY_param_check()\fR were added
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in OpenSSL 1.1.1.
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.PP
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\&\fIEVP_PKEY_private_check()\fR and \fIEVP_PKEY_pairwise_check()\fR were added
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in OpenSSL 3.0.
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2006\-2020 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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