X509_verify_cert(3ssl) - phpMan

X509_verify_cert(3)                          OpenSSL                          X509_verify_cert(3)



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.

       A negative return value from X509_verify_cert() can occur if it is invoked incorrectly,
       such as with no certificate set in ctx, or when it is called twice in succession without
       reinitialising ctx 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.

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.



1.0.2k                                      2017-01-26                        X509_verify_cert(3)

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