Add gitignore and WIP tests

.gitignore

@@ -0,0 +1,2 @@
+.*
+!.gitignore

sodium/secret_stream.go

@@ -1,4 +1,4 @@
-package main
+package sodium
 
 /*
 #cgo CFLAGS: -g -Wall
@@ -6,28 +6,51 @@ package main
 #include <sodium.h>
 */
 import "C"
-import "log"
+import "unsafe"
 
-const block_size int = 16 * 1024 // 16 KiB
+const KeyLen int = C.crypto_secretstream_xchacha20poly1305_KEYBYTES
+const BlockSize int = 16 * 1024 // 16 KiB
 
-// Should take a reader as input and be a reader
+func GenerateKey() [KeyLen]byte {
+  var key [KeyLen]byte
+  keywrap := (*C.uchar)(unsafe.Pointer(&key[0]))
+  C.crypto_secretstream_xchacha20poly1305_keygen(keywrap)
+  return key
+}
+/*
+// Maybe use io.Pipe() for io.Writer
 
-func (*Saliere) Read(p []byte) (n int, err error)
+type SecretStreamEncode struct {
+  src io.Reader
+  state C.crypto_secretstream_xchacha20poly1305_state
+}
 
-func main() {
-  log.Println("Test cgo")
+type SecretStreamDecode struct {
+  src io.Reader
+  state C.crypto_secretstream_xchacha20poly1305_state
+}
+
+func NewSecretStreamEncode(key []byte, src io.Reader) *SecretStream {
+  // it's ok to call init multiple times according to sodium doc
   ret := C.sodium_init()
-  if ret < 0 {
-    log.Panic("Failed to init sodium.")
-  }
-  //unsigned char array as requested
-  var key [C.crypto_secretstream_xchacha20poly1305_KEYBYTES]C.uchar
-  C.crypto_secretstream_xchacha20poly1305_keygen(&key[0])
-
-  var state C.crypto_secretstream_xchacha20poly1305_state
+  if ret < 0 { log.Panic("Failed to init sodium.") }
+
+  s := { src: src}
   var header [C.crypto_secretstream_xchacha20poly1305_HEADERBYTES]C.uchar
+  C.crypto_secretstream_xchacha20poly1305_init_push(&s.state, &header[0], &key[0])
+  // @FIXME do something with header
+
+  return &s
+}
+
+// Encode
+func (s *SecretStream) Read(p []byte) (n int, err error) {
+  s/
+}
+*/
+/*
+func main() {
 
-  C.crypto_secretstream_xchacha20poly1305_init_push(&state, &header[0], &key[0])
   log.Print("key", key)
   log.Print("header", header)
 
@@ -37,3 +60,4 @@ func main() {
   C.crypto_secretstream_xchacha20poly1305_push(&state, &c1[0], nil, &plain[0], C.ulonglong(len(plain)), nil, 0, 0)
   log.Print("c1", c1)
 }
+*/

sodium/secret_stream_test.go

@@ -0,0 +1,12 @@
+package sodium
+
+import "testing"
+import "log"
+
+func TestGenerateKey(t *testing.T) {
+  k := GenerateKey()
+  if len(k) != KeyLen {
+    t.Errorf("Wrong keylen %d instead of %d", len(k), KeyLen)
+  }
+  log.Printf("Generated Key: %v", k)
+}