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man page for ne_ssl_set_verify

NE_SSL_SET_VERIFY(3)						neon API reference					      NE_SSL_SET_VERIFY(3)

ne_ssl_set_verify - register an SSL certificate verification callback SYNOPSIS
#include <ne_session.h> typedef int ne_ssl_verify_fn (void *userdata, int failures, const ne_ssl_certificate *cert); void ne_ssl_set_verify (ne_session *session, ne_ssl_verify_fn verify_fn, void *userdata); DESCRIPTION
To enable manual SSL certificate verification, a callback can be registered using ne_ssl_set_verify. If such a callback is not registered, when a connection is established to an SSL server which does not present a certificate signed by a trusted CA (see ne_ssl_trust_cert(3)), or if the certificate presented is invalid in some way, the connection will fail. When the callback is invoked, the failures parameter gives a bitmask indicating in what way the automatic certificate verification failed. The value is equal to the bit-wise OR of one or more of the following constants (and is guaranteed to be non-zero): NE_SSL_NOTYETVALID The certificate is not yet valid. NE_SSL_EXPIRED The certificate has expired. NE_SSL_IDMISMATCH The hostname used for the session does not match the hostname to which the certificate was issued. NE_SSL_UNTRUSTED The Certificate Authority which signed the certificate is not trusted. Note that if either of theNE_SSL_IDMISMATCH orNE_SSL_UNTRUSTED failures is given, the connection may have been intercepted by a third par- ty, and must not be presumed to be ``secure''. The cert parameter passed to the callback represents the certificate which was presented by the server. If the server presented a chain of certificates, the chain can be accessed using ne_ssl_cert_signedby(3). The cert object given is not valid after the callback returns. RETURN VALUE
The verification callback must return zero to indicate that the certificate should be trusted; and non-zero otherwise (in which case, the connection will fail). EXAMPLES
The following code implements an example verification callback, using the dump_cert function from ne_ssl_cert_subject(3) to display certi- fication information. Notice that the hostname of the server used for the session is passed as theuserdata parameter to the callback. static int my_verify(void *userdata, int failures, const ne_ssl_certificate *cert) { const char *hostname = userdata; dump_cert(cert); puts("Certificate verification failed - the connection may have been " "intercepted by a third party!"); if (failures & NE_SSL_IDMISMATCH) { const char *id = ne_ssl_cert_identity(cert); if (id) printf("Server certificate was issued to '%s' not '%s'.\n", id, hostname); else printf("The certificate was not issued for '%s'\n", hostname); } if (failures & NE_SSL_UNTRUSTED) puts("The certificate is not signed by a trusted Certificate Authority."); /* ... check for validity failures ... */ if (prompt_user()) return 1; /* fail verification */ else return 0; /* trust the certificate anyway */ } int main(...) { ne_session *sess = ne_session_create("https", "", 443); ne_ssl_set_verify(sess, my_verify, ""); ... } SEE ALSO
ne_ssl_trust_cert(3), ne_ssl_readable_dname(3), ne_ssl_cert_subject(3) AUTHOR
Joe Orton <>. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+-----------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+-----------------+ |Availability | SUNWneon | +--------------------+-----------------+ |Interface Stability | Volatile | +--------------------+-----------------+ NOTES
Source for Neon is available on neon 0.25.5 20 January 2006 NE_SSL_SET_VERIFY(3)

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