+#ifndef OPENSSL_NO_STDIO
+/* Read a file that contains our certificate in "PEM" format,
+ * possibly followed by a sequence of CA certificates that should be
+ * sent to the peer in the Certificate message.
+ */
+int SSL_CTX_use_certificate_chain_file(SSL_CTX *ctx, const char *file)
+ {
+ BIO *in;
+ int ret=0;
+ X509 *x=NULL;
+
+ ERR_clear_error(); /* clear error stack for SSL_CTX_use_certificate() */
+
+ in = BIO_new(BIO_s_file_internal());
+ if (in == NULL)
+ {
+ SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_CHAIN_FILE,ERR_R_BUF_LIB);
+ goto end;
+ }
+
+ if (BIO_read_filename(in,file) <= 0)
+ {
+ SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_CHAIN_FILE,ERR_R_SYS_LIB);
+ goto end;
+ }
+
+ x=PEM_read_bio_X509_AUX(in,NULL,ctx->default_passwd_callback,
+ ctx->default_passwd_callback_userdata);
+ if (x == NULL)
+ {
+ SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_CHAIN_FILE,ERR_R_PEM_LIB);
+ goto end;
+ }
+
+ ret = SSL_CTX_use_certificate(ctx, x);
+
+ if (ERR_peek_error() != 0)
+ ret = 0; /* Key/certificate mismatch doesn't imply ret==0 ... */
+ if (ret)
+ {
+ /* If we could set up our certificate, now proceed to
+ * the CA certificates.
+ */
+ X509 *ca;
+ int r;
+ unsigned long err;
+
+ if (ctx->extra_certs != NULL)
+ {
+ sk_X509_pop_free(ctx->extra_certs, X509_free);
+ ctx->extra_certs = NULL;
+ }
+
+ while ((ca = PEM_read_bio_X509(in, NULL,
+ ctx->default_passwd_callback,
+ ctx->default_passwd_callback_userdata))
+ != NULL)
+ {
+ r = SSL_CTX_add_extra_chain_cert(ctx, ca);
+ if (!r)
+ {
+ X509_free(ca);
+ ret = 0;
+ goto end;
+ }
+ /* Note that we must not free r if it was successfully
+ * added to the chain (while we must free the main
+ * certificate, since its reference count is increased
+ * by SSL_CTX_use_certificate). */
+ }
+ /* When the while loop ends, it's usually just EOF. */
+ err = ERR_peek_last_error();
+ if (ERR_GET_LIB(err) == ERR_LIB_PEM && ERR_GET_REASON(err) == PEM_R_NO_START_LINE)
+ ERR_clear_error();
+ else
+ ret = 0; /* some real error */
+ }
+
+end:
+ if (x != NULL) X509_free(x);
+ if (in != NULL) BIO_free(in);
+ return(ret);
+ }
+#endif