func Base64Decode(src []byte) []byte {
sublists := list.Sublist(src, 4)
res := make([]byte, len(sublists)*3)
for i, group := range sublists {
subgroup := mergeGroupOfSix(group)
copy(res[i*3:i*3+3], subgroup)
}
return res
}
func Base64Encode(src []byte) []byte {
sublists := list.Sublist(src, 3)
res := make([]byte, len(sublists)*4)
for i, group := range sublists {
subgroup := groupBySix(group)
copy(res[i*4:i*4+4], subgroup)
}
return res
}
func GuessRepeatXor(size int, src []byte) XorCandidates {
log.Printf("Trying key size %d \n", size)
sublists := list.Sublist(src, size)
blocks := TransposeBlocks(sublists)
xorCandidates := make(XorCandidates, 0)
xorBlocks := make([]XorCandidates, size)
for i, subblock := range blocks {
candidates := SeekXor(subblock)
xorBlocks[i] = candidates
}
for i := 0; i < 3; i++ {
batch := make(XorCandidates, 0)
for j := 0; i < size; j++ {
log.Printf("Got %d/%d\n", j, i)
batch = append(batch, xorBlocks[j][i])
}
xorCandidates = append(xorCandidates,
mergeXorCandidates(batch))
}
sort.Sort(ByScore{xorCandidates})
return xorCandidates
}