195 lines
5.9 KiB
Groff
195 lines
5.9 KiB
Groff
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.\" ========================================================================
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.\"
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.IX Title "x509 3"
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.TH x509 3 "2018-03-27" "1.0.2o" "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 \- X.509 certificate handling
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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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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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A X.509 certificate is a structured grouping of information about
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an individual, a device, or anything one can imagine. A X.509 \s-1CRL
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\&\s0(certificate revocation list) is a tool to help determine if a
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certificate is still valid. The exact definition of those can be
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found in the X.509 document from ITU-T, or in \s-1RFC3280\s0 from \s-1PKIX.\s0
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In OpenSSL, the type X509 is used to express such a certificate, and
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the type X509_CRL is used to express a \s-1CRL.\s0
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.PP
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A related structure is a certificate request, defined in PKCS#10 from
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\&\s-1RSA\s0 Security, Inc, also reflected in \s-1RFC2896. \s0 In OpenSSL, the type
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X509_REQ is used to express such a certificate request.
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.PP
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To handle some complex parts of a certificate, there are the types
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X509_NAME (to express a certificate name), X509_ATTRIBUTE (to express
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a certificate attributes), X509_EXTENSION (to express a certificate
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extension) and a few more.
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.PP
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Finally, there's the supertype X509_INFO, which can contain a \s-1CRL,\s0 a
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certificate and a corresponding private key.
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.PP
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\&\fBX509_\fR\fI...\fR, \fBd2i_X509_\fR\fI...\fR and \fBi2d_X509_\fR\fI...\fR handle X.509
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certificates, with some exceptions, shown below.
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.PP
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\&\fBX509_CRL_\fR\fI...\fR, \fBd2i_X509_CRL_\fR\fI...\fR and \fBi2d_X509_CRL_\fR\fI...\fR
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handle X.509 CRLs.
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.PP
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\&\fBX509_REQ_\fR\fI...\fR, \fBd2i_X509_REQ_\fR\fI...\fR and \fBi2d_X509_REQ_\fR\fI...\fR
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handle PKCS#10 certificate requests.
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.PP
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\&\fBX509_NAME_\fR\fI...\fR handle certificate names.
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.PP
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\&\fBX509_ATTRIBUTE_\fR\fI...\fR handle certificate attributes.
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.PP
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\&\fBX509_EXTENSION_\fR\fI...\fR handle certificate extensions.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIX509_NAME_ENTRY_get_object\fR\|(3),
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\&\fIX509_NAME_add_entry_by_txt\fR\|(3),
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\&\fIX509_NAME_add_entry_by_NID\fR\|(3),
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\&\fIX509_NAME_print_ex\fR\|(3),
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\&\fIX509_NAME_new\fR\|(3),
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\&\fId2i_X509\fR\|(3),
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\&\fId2i_X509_ALGOR\fR\|(3),
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\&\fId2i_X509_CRL\fR\|(3),
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\&\fId2i_X509_NAME\fR\|(3),
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\&\fId2i_X509_REQ\fR\|(3),
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\&\fId2i_X509_SIG\fR\|(3),
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\&\fIcrypto\fR\|(3),
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\&\fIx509v3\fR\|(3)
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