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

5 files changed, 51 insertions, 0 deletions

diff --git a/internal/configfile/config_test/.gitignore b/internal/configfile/config_test/.gitignore
new file mode 100644
index 0000000..0720169
--- /dev/null
+++ b/internal/configfile/config_test/.gitignore
@@ -0,0 +1 @@
+tmp.conf
diff --git a/internal/configfile/config_test/PlaintextNames.conf b/internal/configfile/config_test/PlaintextNames.conf
new file mode 100644
index 0000000..c1ff8cc
--- /dev/null
+++ b/internal/configfile/config_test/PlaintextNames.conf
@@ -0,0 +1,14 @@
+{
+	"EncryptedKey": "rG4u0argMq02V5G9Fa+gAaaHtNrj3wn7OZjP44hWOzO4yBFtn+Qn3PW4V6LMuKmGLEhyktCyWOI3K8lj",
+	"ScryptObject": {
+		"Salt": "bRjq1V63u5ML3FoTWx/GBXUhUVpTunOX3DPxS+yPjg0=",
+		"N": 65536,
+		"R": 8,
+		"P": 1,
+		"KeyLen": 32
+	},
+	"Version": 2,
+	"FeatureFlags": [
+		"PlaintextNames"
+	]
+}
diff --git a/internal/configfile/config_test/StrangeFeature.conf b/internal/configfile/config_test/StrangeFeature.conf
new file mode 100644
index 0000000..6a97781
--- /dev/null
+++ b/internal/configfile/config_test/StrangeFeature.conf
@@ -0,0 +1,14 @@
+{
+	"EncryptedKey": "rG4u0argMq02V5G9Fa+gAaaHtNrj3wn7OZjP44hWOzO4yBFtn+Qn3PW4V6LMuKmGLEhyktCyWOI3K8lj",
+	"ScryptObject": {
+		"Salt": "bRjq1V63u5ML3FoTWx/GBXUhUVpTunOX3DPxS+yPjg0=",
+		"N": 65536,
+		"R": 8,
+		"P": 1,
+		"KeyLen": 32
+	},
+	"Version": 2,
+	"FeatureFlags": [
+		"StrangeFeatureFlag"
+	]
+}
diff --git a/internal/configfile/config_test/v1.conf b/internal/configfile/config_test/v1.conf
new file mode 100644
index 0000000..588a25a
--- /dev/null
+++ b/internal/configfile/config_test/v1.conf
@@ -0,0 +1,11 @@
+{
+	"EncryptedKey": "t6YAvFQJvbv46c93bHQ5IZnvNz80DA9cohGoSPL/2M257LuIigow6jbr8b9HhnbDqHTCcz7aKkMDzneF",
+	"ScryptObject": {
+		"Salt": "yT4yQmmRmVNx2P0tJrUswk5SQzZaL6Z8kUteAoNJkXM=",
+		"N": 65536,
+		"R": 8,
+		"P": 1,
+		"KeyLen": 32
+	},
+	"Version": 1
+}
diff --git a/internal/configfile/config_test/v2.conf b/internal/configfile/config_test/v2.conf
new file mode 100644
index 0000000..8ef3dcf
--- /dev/null
+++ b/internal/configfile/config_test/v2.conf
@@ -0,0 +1,11 @@
+{
+	"EncryptedKey": "RvxJnZWKTBSU21+7xbl08xlZyNyUCkpIqlK8Z51TUrRiBhqqNPxbdk1WXMvmOf/YzZ85Xbyz+DGM+SDf",
+	"ScryptObject": {
+		"Salt": "2OrFRfdW/5SanbMXM3TMINmfMO6oYU9awG+NZ77V8E8=",
+		"N": 65536,
+		"R": 8,
+		"P": 1,
+		"KeyLen": 32
+	},
+	"Version": 2
+}