https://bugs.winehq.org/show_bug.cgi?id=42180
--- Comment #8 from winetaste@gmx.net --- Sign in works for me now - GnuTLS error is gone.
fixme:secur32:schan_QueryContextAttributesW Unhandled attribute 0x23 fixme:secur32:schan_QueryContextAttributesW Unhandled attribute 0x54
are still there, but it seems that it doesn't matter for this.
Can authorize iTunes with Code send to iPhone. Can authorize for bought music and playing.
Wine 2.13 win32-Prefix on Ubuntu MATE 17.04 and iTunesSetup.exe -> 12.6.2.20 libgnutls30 is 3.5.6-4ubuntu4.1