Major refactoring: Split up "cryptfs" into several internal packages

"git status" for reference:

deleted:    cryptfs/cryptfs.go
deleted:    cryptfs/names_core.go
modified:   integration_tests/cli_test.go
modified:   integration_tests/helpers.go
renamed:    cryptfs/config_file.go -> internal/configfile/config_file.go
renamed:    cryptfs/config_test.go -> internal/configfile/config_test.go
renamed:    cryptfs/config_test/.gitignore -> internal/configfile/config_test/.gitignore
renamed:    cryptfs/config_test/PlaintextNames.conf -> internal/configfile/config_test/PlaintextNames.conf
renamed:    cryptfs/config_test/StrangeFeature.conf -> internal/configfile/config_test/StrangeFeature.conf
renamed:    cryptfs/config_test/v1.conf -> internal/configfile/config_test/v1.conf
renamed:    cryptfs/config_test/v2.conf -> internal/configfile/config_test/v2.conf
renamed:    cryptfs/kdf.go -> internal/configfile/kdf.go
renamed:    cryptfs/kdf_test.go -> internal/configfile/kdf_test.go
renamed:    cryptfs/cryptfs_content.go -> internal/contentenc/content.go
new file:   internal/contentenc/content_api.go
renamed:    cryptfs/content_test.go -> internal/contentenc/content_test.go
renamed:    cryptfs/file_header.go -> internal/contentenc/file_header.go
renamed:    cryptfs/intrablock.go -> internal/contentenc/intrablock.go
renamed:    cryptfs/address_translation.go -> internal/contentenc/offsets.go
new file:   internal/cryptocore/crypto_api.go
renamed:    cryptfs/gcm_go1.4.go -> internal/cryptocore/gcm_go1.4.go
renamed:    cryptfs/gcm_go1.5.go -> internal/cryptocore/gcm_go1.5.go
renamed:    cryptfs/nonce.go -> internal/cryptocore/nonce.go
renamed:    cryptfs/openssl_aead.go -> internal/cryptocore/openssl_aead.go
renamed:    cryptfs/openssl_benchmark.bash -> internal/cryptocore/openssl_benchmark.bash
renamed:    cryptfs/openssl_test.go -> internal/cryptocore/openssl_test.go
new file:   internal/nametransform/name_api.go
new file:   internal/nametransform/names_core.go
renamed:    cryptfs/names_diriv.go -> internal/nametransform/names_diriv.go
renamed:    cryptfs/names_noiv.go -> internal/nametransform/names_noiv.go
renamed:    cryptfs/names_test.go -> internal/nametransform/names_test.go
new file:   internal/nametransform/pad16.go
renamed:    cryptfs/log.go -> internal/toggledlog/log.go
renamed:    cryptfs/log_go1.4.go -> internal/toggledlog/log_go1.4.go
renamed:    cryptfs/log_go1.5.go -> internal/toggledlog/log_go1.5.go
modified:   main.go
modified:   masterkey.go
modified:   pathfs_frontend/file.go
modified:   pathfs_frontend/file_holes.go
modified:   pathfs_frontend/fs.go
modified:   pathfs_frontend/fs_dir.go
modified:   pathfs_frontend/names.go
modified:   test.bash

1 files changed, 0 insertions, 60 deletions

diff --git a/cryptfs/kdf_test.go b/cryptfs/kdf_test.go
deleted file mode 100644
index 4d909ea..0000000
--- a/cryptfs/kdf_test.go
+++ /dev/null
@@ -1,60 +0,0 @@
-package cryptfs
-
-import (
-	"testing"
-)
-
-/*
-Results on a 2.7GHz Pentium G630:
-
-gocryptfs/cryptfs$ go test -bench=.
-PASS
-BenchmarkScrypt10-2	     300	   6021435 ns/op ... 6ms
-BenchmarkScrypt11-2	     100	  11861460 ns/op
-BenchmarkScrypt12-2	     100	  23420822 ns/op
-BenchmarkScrypt13-2	      30	  47666518 ns/op
-BenchmarkScrypt14-2	      20	  92561590 ns/op ... 92ms
-BenchmarkScrypt15-2	      10	 183971593 ns/op
-BenchmarkScrypt16-2	       3	 368506365 ns/op
-BenchmarkScrypt17-2	       2	 755502608 ns/op ... 755ms
-ok  	github.com/rfjakob/gocryptfs/cryptfs	18.772s
-*/
-
-func benchmarkScryptN(n int, b *testing.B) {
-	kdf := NewScryptKdf(n)
-	for i := 0; i < b.N; i++ {
-		kdf.DeriveKey("test")
-	}
-}
-
-func BenchmarkScrypt10(b *testing.B) {
-	benchmarkScryptN(10, b)
-}
-
-func BenchmarkScrypt11(b *testing.B) {
-	benchmarkScryptN(11, b)
-}
-
-func BenchmarkScrypt12(b *testing.B) {
-	benchmarkScryptN(12, b)
-}
-
-func BenchmarkScrypt13(b *testing.B) {
-	benchmarkScryptN(13, b)
-}
-
-func BenchmarkScrypt14(b *testing.B) {
-	benchmarkScryptN(14, b)
-}
-
-func BenchmarkScrypt15(b *testing.B) {
-	benchmarkScryptN(15, b)
-}
-
-func BenchmarkScrypt16(b *testing.B) {
-	benchmarkScryptN(16, b)
-}
-
-func BenchmarkScrypt17(b *testing.B) {
-	benchmarkScryptN(17, b)
-}