210 lines
6.9 KiB
Groff
Executable File
210 lines
6.9 KiB
Groff
Executable File
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.\" ========================================================================
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.\"
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.IX Title "X509_GET_PUBKEY 3"
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.TH X509_GET_PUBKEY 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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X509_get_pubkey, X509_get0_pubkey, X509_set_pubkey, X509_get_X509_PUBKEY,
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X509_REQ_get_pubkey, X509_REQ_get0_pubkey, X509_REQ_set_pubkey,
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X509_REQ_get_X509_PUBKEY \- get or set certificate or certificate request
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public key
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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/x509.h>
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\&
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\& EVP_PKEY *X509_get_pubkey(X509 *x);
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\& EVP_PKEY *X509_get0_pubkey(const X509 *x);
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\& int X509_set_pubkey(X509 *x, EVP_PKEY *pkey);
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\& X509_PUBKEY *X509_get_X509_PUBKEY(X509 *x);
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\&
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\& EVP_PKEY *X509_REQ_get_pubkey(X509_REQ *req);
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\& EVP_PKEY *X509_REQ_get0_pubkey(X509_REQ *req);
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\& int X509_REQ_set_pubkey(X509_REQ *x, EVP_PKEY *pkey);
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\& X509_PUBKEY *X509_REQ_get_X509_PUBKEY(X509_REQ *x);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fIX509_get_pubkey()\fR attempts to decode the public key for certificate \fBx\fR. If
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successful it returns the public key as an \fB\s-1EVP_PKEY\s0\fR pointer with its
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reference count incremented: this means the returned key must be freed up
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after use. \fIX509_get0_pubkey()\fR is similar except it does \fBnot\fR increment
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the reference count of the returned \fB\s-1EVP_PKEY\s0\fR so it must not be freed up
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after use.
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.PP
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\&\fIX509_get_X509_PUBKEY()\fR returns an internal pointer to the \fBX509_PUBKEY\fR
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structure which encodes the certificate of \fBx\fR. The returned value
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must not be freed up after use.
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.PP
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\&\fIX509_set_pubkey()\fR attempts to set the public key for certificate \fBx\fR to
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\&\fBpkey\fR. The key \fBpkey\fR should be freed up after use.
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.PP
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\&\fIX509_REQ_get_pubkey()\fR, \fIX509_REQ_get0_pubkey()\fR, \fIX509_REQ_set_pubkey()\fR and
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\&\fIX509_REQ_get_X509_PUBKEY()\fR are similar but operate on certificate request \fBreq\fR.
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.SH "NOTES"
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.IX Header "NOTES"
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The first time a public key is decoded the \fB\s-1EVP_PKEY\s0\fR structure is
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cached in the certificate or certificate request itself. Subsequent calls
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return the cached structure with its reference count incremented to
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improve performance.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fIX509_get_pubkey()\fR, \fIX509_get0_pubkey()\fR, \fIX509_get_X509_PUBKEY()\fR,
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\&\fIX509_REQ_get_pubkey()\fR and \fIX509_REQ_get_X509_PUBKEY()\fR return a public key or
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\&\fB\s-1NULL\s0\fR if an error occurred.
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.PP
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\&\fIX509_set_pubkey()\fR and \fIX509_REQ_set_pubkey()\fR return 1 for success and 0
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for failure.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fId2i_X509\fR\|(3),
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\&\fIERR_get_error\fR\|(3),
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\&\fIX509_CRL_get0_by_serial\fR\|(3),
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\&\fIX509_get0_signature\fR\|(3),
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\&\fIX509_get_ext_d2i\fR\|(3),
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\&\fIX509_get_extension_flags\fR\|(3),
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\&\fIX509_get_subject_name\fR\|(3),
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\&\fIX509_get_version\fR\|(3),
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\&\fIX509_NAME_add_entry_by_txt\fR\|(3),
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\&\fIX509_NAME_ENTRY_get_object\fR\|(3),
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\&\fIX509_NAME_get_index_by_NID\fR\|(3),
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\&\fIX509_NAME_print_ex\fR\|(3),
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\&\fIX509_new\fR\|(3),
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\&\fIX509_sign\fR\|(3),
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\&\fIX509V3_get_d2i\fR\|(3),
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\&\fIX509_verify_cert\fR\|(3)
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2015\-2016 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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