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Edit File : EVP_PKEY_missing_parameters.3ssl \| Size : 6.20 KB
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" EVP_PKEY_copy_parameters, EVP_PKEY_missing_parameters, EVP_PKEY_cmp_parameters, EVP_PKEY_cmp \- public key parameter and comparison functions .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/evp.h> \& \& int EVP_PKEY_missing_parameters(const EVP_PKEY pkey); \& int EVP_PKEY_copy_parameters(EVP_PKEY to, const EVP_PKEY from); \& \& int EVP_PKEY_cmp_parameters(const EVP_PKEY a, const EVP_PKEY b); \& int EVP_PKEY_cmp(const EVP_PKEY a, const EVP_PKEY b); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" The function \fBEVP_PKEY_missing_parameters()\fR returns 1 if the public key parameters of \fBpkey\fR are missing and 0 if they are present or the algorithm doesn't use parameters. .PP The function \fBEVP_PKEY_copy_parameters()\fR copies the parameters from key \&\fBfrom\fR to key \fBto\fR. An error is returned if the parameters are missing in \&\fBfrom\fR or present in both \fBfrom\fR and \fBto\fR and mismatch. If the parameters in \fBfrom\fR and \fBto\fR are both present and match this function has no effect. .PP The function \fBEVP_PKEY_cmp_parameters()\fR compares the parameters of keys \&\fBa\fR and \fBb\fR. .PP The function \fBEVP_PKEY_cmp()\fR compares the public key components and paramters (if present) of keys \fBa\fR and \fBb\fR. .SH "NOTES" .IX Header "NOTES" The main purpose of the functions \fBEVP_PKEY_missing_parameters()\fR and \&\fBEVP_PKEY_copy_parameters()\fR is to handle public keys in certificates where the parameters are sometimes omitted from a public key if they are inherited from the \s-1CA\s0 that signed it. .PP Since OpenSSL private keys contain public key components too the function \&\fBEVP_PKEY_cmp()\fR can also be used to determine if a private key matches a public key. .SH "RETURN VALUES" .IX Header "RETURN VALUES" The function \fBEVP_PKEY_missing_parameters()\fR returns 1 if the public key parameters of \fBpkey\fR are missing and 0 if they are present or the algorithm doesn't use parameters. .PP These functions \fBEVP_PKEY_copy_parameters()\fR returns 1 for success and 0 for failure. .PP The function \fBEVP_PKEY_cmp_parameters()\fR and \fBEVP_PKEY_cmp()\fR return 1 if the keys match, 0 if they don't match, \-1 if the key types are different and \&\-2 if the operation is not supported. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBEVP_PKEY_CTX_new\fR\\|(3), \&\fBEVP_PKEY_keygen\fR\\|(3) Back

Edit File : EVP_PKEY_missing_parameters.3ssl | Size : 6.20 KB

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.\" ========================================================================
.\"
.IX Title "EVP_PKEY_cmp 3"
.TH EVP_PKEY_cmp 3 "2019-12-20" "1.0.2u" "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_copy_parameters, EVP_PKEY_missing_parameters, EVP_PKEY_cmp_parameters, EVP_PKEY_cmp \- public key parameter and comparison functions
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/evp.h>
\&
\& int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey);
\& int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from);
\&
\& int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b);
\& int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The function \fBEVP_PKEY_missing_parameters()\fR returns 1 if the public key
parameters of \fBpkey\fR are missing and 0 if they are present or the algorithm
doesn't use parameters.
.PP
The function \fBEVP_PKEY_copy_parameters()\fR copies the parameters from key
\&\fBfrom\fR to key \fBto\fR. An error is returned if the parameters are missing in
\&\fBfrom\fR or present in both \fBfrom\fR and \fBto\fR and mismatch. If the parameters
in \fBfrom\fR and \fBto\fR are both present and match this function has no effect.
.PP
The function \fBEVP_PKEY_cmp_parameters()\fR compares the parameters of keys
\&\fBa\fR and \fBb\fR.
.PP
The function \fBEVP_PKEY_cmp()\fR compares the public key components and paramters
(if present) of keys \fBa\fR and \fBb\fR.
.SH "NOTES"
.IX Header "NOTES"
The main purpose of the functions \fBEVP_PKEY_missing_parameters()\fR and
\&\fBEVP_PKEY_copy_parameters()\fR is to handle public keys in certificates where the
parameters are sometimes omitted from a public key if they are inherited from
the \s-1CA\s0 that signed it.
.PP
Since OpenSSL private keys contain public key components too the function
\&\fBEVP_PKEY_cmp()\fR can also be used to determine if a private key matches
a public key.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
The function \fBEVP_PKEY_missing_parameters()\fR returns 1 if the public key
parameters of \fBpkey\fR are missing and 0 if they are present or the algorithm
doesn't use parameters.
.PP
These functions \fBEVP_PKEY_copy_parameters()\fR returns 1 for success and 0 for
failure.
.PP
The function \fBEVP_PKEY_cmp_parameters()\fR and \fBEVP_PKEY_cmp()\fR return 1 if the
keys match, 0 if they don't match, \-1 if the key types are different and
\&\-2 if the operation is not supported.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBEVP_PKEY_CTX_new\fR\|(3),
\&\fBEVP_PKEY_keygen\fR\|(3)

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