04-19-2007
I have deleted my message. After browsing some other posts on the site, this is a homework question. I thought that this was homework, but since you had done some work, I'd point you in the right direction. But it turns out that what you've posted is part of the question, so that's a no go.
And please do not post any more homework questions. Here are the
rules. Please read them.
This is also a warning. Any more homework questions will result in a ban.
Last edited by blowtorch; 04-19-2007 at 02:48 AM..
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LEARN ABOUT DEBIAN
x509_verify_cert
X509_verify_cert(3SSL) OpenSSL X509_verify_cert(3SSL)
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) 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.
1.0.1e 2013-02-11 X509_verify_cert(3SSL)