+(autoload 'rfc2104-hash "rfc2104")
+
+(defun nnimap-login (user password)
+ (cond
+ ((not (nnimap-capability "LOGINDISABLED"))
+ (nnimap-command "LOGIN %S %S" user password))
+ ((nnimap-capability "AUTH=PLAIN")
+ (nnimap-command
+ "AUTHENTICATE PLAIN %s"
+ (base64-encode-string
+ (format "\000%s\000%s"
+ (nnimap-quote-specials user)
+ (nnimap-quote-specials password)))))
+ ((nnimap-capability "AUTH=CRAM-MD5")
+ (erase-buffer)
+ (let ((sequence (nnimap-send-command "AUTHENTICATE CRAM-MD5"))
+ (challenge (nnimap-wait-for-line "^\\+\\(.*\\)\n")))
+ (process-send-string
+ (get-buffer-process (current-buffer))
+ (concat
+ (base64-encode-string
+ (concat user " "
+ (rfc2104-hash 'md5 64 16 password
+ (base64-decode-string challenge))))
+ "\r\n"))
+ (nnimap-wait-for-response sequence)))))
+