1 files changed, 47 insertions, 0 deletions
diff --git a/src/auths/get_data.c b/src/auths/get_data.c
new file mode 100644
index 0000000..7d974ab
--- /dev/null
+++ b/src/auths/get_data.c
@@ -0,0 +1,47 @@
+/*************************************************
+*     Exim - an Internet mail transport agent    *
+*************************************************/
+
+/* Copyright (c) University of Cambridge 1995 - 2018 */
+/* See the file NOTICE for conditions of use and distribution. */
+
+#include "../exim.h"
+
+
+/*************************************************
+*      Issue a challenge and get a response      *
+*************************************************/
+
+/* This function is used by authentication drivers to output a challenge
+to the SMTP client and read the response line.
+
+Arguments:
+   aptr       set to point to the response (which is in big_buffer)
+   challenge  the challenge text (unencoded, may be binary)
+   challen    the length of the challenge text
+
+Returns:      OK on success
+              BAD64 if response too large for buffer
+              CANCELLED if response is "*"
+*/
+
+int
+auth_get_data(uschar **aptr, uschar *challenge, int challen)
+{
+int c;
+int p = 0;
+smtp_printf("334 %s\r\n", FALSE, b64encode(challenge, challen));
+while ((c = receive_getc(GETC_BUFFER_UNLIMITED)) != '\n' && c != EOF)
+  {
+  if (p >= big_buffer_size - 1) return BAD64;
+  big_buffer[p++] = c;
+  }
+if (p > 0 && big_buffer[p-1] == '\r') p--;
+big_buffer[p] = 0;
+DEBUG(D_receive) debug_printf("SMTP<< %s\n", big_buffer);
+if (Ustrcmp(big_buffer, "*") == 0) return CANCELLED;
+*aptr = big_buffer;
+return OK;
+}
+
+/* End of get_data.c */