Hi,
You can use the function SSL_CTX_set_verify to declare a callback function which be called by the OpenSSL framework if an error occured during the default certificate verification.
In your callback function, return 1 when the error is equal to X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN
See http://www.openssl.org/docs/ssl/SSL_CTX_set_verify.html# for an example

Hope this help

Frédéric.

Seb James wrote:
Hello all,

I was having a play with Eric Rescorla's programs implementing simple
openssl client/server comms; the ones from his "An Introduction to
OpenSSL Programming" articles. 

He supplies some self-signed certificates for testing along with the
source accompanying the articles. Now, I compile his software with
openssl version 0.9.7e and the function

SSL_get_verify_result (ssl)

throws the error 19, which translates to:

X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN

I presume openssl now defaults to refusing to deal with self-signed
certificates due to the well known problems associated with them. 

Is there a function I can call that will allow self-signed certificates
in my program for the purposes of testing?

regards,

Seb

  

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