'\" t
.\"     Title: ne_ssl_cert_cmp
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 23 November 2025
.\"    Manual: neon API reference
.\"    Source: neon 0.36.0
.\"  Language: English
.\"
.TH "NE_SSL_CERT_CMP" "3" "23 November 2025" "neon 0.36.0" "neon API reference"
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.SH "NAME"
ne_ssl_cert_cmp, ne_ssl_cert_free, ne_ssl_cert_digest, ne_ssl_cert_hdigest, ne_ssl_cert_validity, ne_ssl_cert_validity_time \- functions to operate on certificate objects
.SH "SYNOPSIS"
.sp
.ft B
.nf
#include <ne_header\&.h>
.fi
.ft
.HP \w'int\ ne_ssl_cert_cmp('u
.BI "int ne_ssl_cert_cmp(const\ ne_ssl_certificate\ *" "c1" ", const\ ne_ssl_certificate\ *" "c2" ");"
.HP \w'void\ ne_ssl_cert_free('u
.BI "void ne_ssl_cert_free(ne_ssl_certificate\ *" "cert" ");"
.HP \w'int\ ne_ssl_cert_digest('u
.BI "int ne_ssl_cert_digest(const\ ne_ssl_certificate\ *" "c1" ", char\ *" "digest" ");"
.HP \w'char\ *ne_ssl_cert_hdigest('u
.BI "char *ne_ssl_cert_hdigest(const\ ne_ssl_certificate\ *" "c1" ", unsigned\ int\ " "flags" ");"
.HP \w'void\ ne_ssl_cert_validity_time('u
.BI "void ne_ssl_cert_validity_time(const\ ne_ssl_certificate\ *" "cert" ", time_t\ *" "from" ", time_t\ *" "until" ");"
.HP \w'void\ ne_ssl_cert_validity('u
.BI "void ne_ssl_cert_validity(const\ ne_ssl_certificate\ *" "cert" ", char\ *" "from" ", char\ *" "until" ");"
.SH "DESCRIPTION"
.PP
The
\fBne_ssl_cert_cmp\fR
function can be used to compare two certificate objects; it returns zero if they refer to the same certificate, and non\-zero otherwise\&.
.PP
The
\fBne_ssl_cert_free\fR
function can be used to destroy a certificate object when it is no longer needed\&.
.PP
The
\fBne_ssl_cert_digest\fR
function writes a human\-readable fingerprint as a NUL\-terminated string to the
\fIdigest\fR
buffer provided, in the format "aa:bb\&.\&.\&.:ff"\&. The
\fIdigest\fR
buffer must be at least
NE_SSL_DIGESTLEN
bytes in length\&.
.PP
The
\fBne_ssl_cert_hdigest\fR
function returns a human\-readable fingerprint for the certificate object\&. The
\fIflags\fR
parameter specifies the hash formatting options as if passed to
ne_strhash\&. The returned string is malloc\-allocated and must be freed after use\&.
.PP
The
\fBne_ssl_cert_validity_time\fR
function retrieves both the time from which the certificate is valid from and until\&. Each time is returned through the
\fIfrom\fR
and
\fIuntil\fR
parameters, which are written as
(time_t)\-1
if either time cannot be represented as a
time_t
value\&. The
\fBne_ssl_cert_validity\fR
function similarly writes the validity times to the string buffers provided, using RFC 1123\-style date formatting (not localized)\&. The output parameters must be at least
NE_SSL_VDATELEN
bytes in length\&. Either parameter can be passed as
NULL\&.
.SH "RETURN VALUE"
.PP
\fBne_ssl_cert_cmp\fR
returns 0 if the certificates are the same, and non\-zero otherwise\&.
\fBne_ssl_cert_digest\fR
returns 0 on success or non\-zero on error\&. The return value of
\fBne_ssl_cert_hdigest\fR
is a NUL\-terminated malloc\-allocated string, or
NULL
if the hash cannot be created\&.
.SH "HISTORY"
.PP
\fBne_ssl_cert_hdigest\fR
is available in in neon 0\&.32\&.0 and later\&.
.SH "SEE ALSO"
.PP
ne_strhash
.SH "COPYRIGHT"
.br
Copyright \(co 2001-2025 Joe Orton
.br