nitializes the internal state and resources of the X509_STORE_CTX, and must be called before each call to <a href="../man3/X509_verify_cert.html">X509_verify_cert(3)</a> or <a href="../man3/X509_STORE_CTX_verify.html">X509_STORE_CTX_verify(3)</a>, i.e., a context is only good for one verification. If you want to verify a further certificate or chain with the same <i>ctx</i> then you must call X509_STORE_CTX_init() again. The trusted certificate store is set to <i>trust_store</i> of type <b>X509_STORE</b>. T