void X509_STORE_CTX_set_cert(X509_STORE_CTX *c,X509 *x);
void X509_STORE_CTX_set_chain(X509_STORE_CTX *c,STACK_OF(X509) *sk);
int X509_STORE_CTX_set_purpose(X509_STORE_CTX *ctx, int purpose);
void X509_STORE_CTX_set_cert(X509_STORE_CTX *c,X509 *x);
void X509_STORE_CTX_set_chain(X509_STORE_CTX *c,STACK_OF(X509) *sk);
int X509_STORE_CTX_set_purpose(X509_STORE_CTX *ctx, int purpose);