X509_verify_cert
Section: OpenSSL (3SSL)
Updated: 2016-05-03
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NAME
X509_verify_cert - discover and verify X509 certificte chain
SYNOPSIS
#include <openssl/x509.h>
int X509_verify_cert(X509_STORE_CTX *ctx);
DESCRIPTION
The
X509_verify_cert() function attempts to discover and validate a
certificate chain based on parameters in
ctx. A complete description of
the process is contained in the
verify(1) manual page.
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.
If the function fails additional error information can be obtained by
examining ctx using, for example X509_STORE_CTX_get_error().
NOTES
Applications rarely call this function directly but it is used by
OpenSSL internally for certificate validation, in both the S/MIME and
SSL/TLS code.
The negative return value from X509_verify_cert() can only occur if no
certificate is set in ctx (due to a programming error); if X509_verify_cert()
twice without reinitialising ctx in between; or if a retry
operation is requested during internal lookups (which never happens with
standard lookup methods). It is however recommended that application check
for <= 0 return value on error.
BUGS
This function uses the header
x509.h as opposed to most chain verification
functiosn which use
x509_vfy.h.
SEE ALSO
X509_STORE_CTX_get_error(3)
HISTORY
X509_verify_cert() is available in all versions of SSLeay and OpenSSL.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUES
-
- NOTES
-
- BUGS
-
- SEE ALSO
-
- HISTORY
-