And according to the gpg implementation: http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git&a=search&h=refs%2Fheads%2FSTABLE-BRANCH-2-0&st=grep&s=s2kmode R=agl CC=evn, golang-dev https://golang.org/cl/11355046
And according to the gpg implementation: http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git&a=search&h=refs%2Fheads%2FSTABLE-BRANCH-2-0&st=grep&s=s2kmode R=agl CC=evn, golang-dev https://golang.org/cl/11355046