void X509_STORE_CTX_chain_purpose(X509_STORE_CTX *ctx, int purpose)
int X509_STORE_CTX_chain_purpose(X509_STORE_CTX *ctx, int purpose)
void X509_STORE_CTX_chain_purpose(X509_STORE_CTX *ctx, int purpose)	{	ctx->chain_purpose = purpose;	}