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Edit File : X509_verify_cert.3 \| Size : 5.67 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" X509_verify_cert \- discover and verify X509 certificte chain .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/x509.h> \& \& int X509_verify_cert(X509_STORE_CTX ctx); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" The \fBX509_verify_cert()\fR function attempts to discover and validate a certificate chain based on parameters in \fBctx\fR. A complete description of the process is contained in the \fBverify\fR\\|(1) manual page. .SH "RETURN VALUES" .IX Header "RETURN VALUES" If a complete chain can be built and validated this function returns 1, otherwise it return zero, in exceptional circumstances it can also return a negative code. .PP If the function fails additional error information can be obtained by examining \fBctx\fR using, for example \fBX509_STORE_CTX_get_error()\fR. .SH "NOTES" .IX Header "NOTES" Applications rarely call this function directly but it is used by OpenSSL internally for certificate validation, in both the S/MIME and \&\s-1SSL/TLS\s0 code. .PP A negative return value from \fBX509_verify_cert()\fR can occur if it is invoked incorrectly, such as with no certificate set in \fBctx\fR, or when it is called twice in succession without reinitialising \fBctx\fR for the second call. A negative return value can also happen due to internal resource problems or if a retry operation is requested during internal lookups (which never happens with standard lookup methods). Applications must check for <= 0 return value on error. .SH "BUGS" .IX Header "BUGS" This function uses the header \fBx509.h\fR as opposed to most chain verification functiosn which use \fBx509_vfy.h\fR. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBX509_STORE_CTX_get_error\fR\\|(3) .SH "HISTORY" .IX Header "HISTORY" \&\fBX509_verify_cert()\fR is available in all versions of SSLeay and OpenSSL. Back

Edit File : X509_verify_cert.3 | Size : 5.67 KB

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.\" ========================================================================
.\"
.IX Title "X509_verify_cert 3"
.TH X509_verify_cert 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"
X509_verify_cert \- discover and verify X509 certificte chain
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/x509.h>
\&
\& int X509_verify_cert(X509_STORE_CTX *ctx);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBX509_verify_cert()\fR function attempts to discover and validate a
certificate chain based on parameters in \fBctx\fR. A complete description of
the process is contained in the \fBverify\fR\|(1) manual page.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
If a complete chain can be built and validated this function returns 1,
otherwise it return zero, in exceptional circumstances it can also
return a negative code.
.PP
If the function fails additional error information can be obtained by
examining \fBctx\fR using, for example \fBX509_STORE_CTX_get_error()\fR.
.SH "NOTES"
.IX Header "NOTES"
Applications rarely call this function directly but it is used by
OpenSSL internally for certificate validation, in both the S/MIME and
\&\s-1SSL/TLS\s0 code.
.PP
A negative return value from \fBX509_verify_cert()\fR can occur if it is invoked
incorrectly, such as with no certificate set in \fBctx\fR, or when it is called
twice in succession without reinitialising \fBctx\fR for the second call.
A negative return value can also happen due to internal resource problems or if
a retry operation is requested during internal lookups (which never happens
with standard lookup methods).
Applications must check for <= 0 return value on error.
.SH "BUGS"
.IX Header "BUGS"
This function uses the header \fBx509.h\fR as opposed to most chain verification
functiosn which use \fBx509_vfy.h\fR.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBX509_STORE_CTX_get_error\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\fBX509_verify_cert()\fR is available in all versions of SSLeay and OpenSSL.

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