lib: remove OracleAESRandomEncrypt

Move function into C11 where it is used.

2 files changed, 1 insertions, 33 deletions

diff --git a/lib/oracle.go b/lib/oracle.go
index 29338ff..8a449a1 100644
--- a/lib/oracle.go
+++ b/lib/oracle.go
@@ -25,38 +25,6 @@ func init() {
 	}
 }
 
-// Given an input `in`, this function AES encrypts `in` using a
-// randomly generate 16-byte key using ECB or CBC mode and returns the
-// cipher.
-func OracleAESRandomEncrypt(in []byte) []byte {
-	// Generate random key.
-	key, err := RandomBytes(16)
-	if err != nil {
-		panic(err)
-	}
-	// Generate random initialization vector; needed for AES CBC.
-	iv, err := RandomBytes(16)
-	if err != nil {
-		panic(err)
-	}
-
-	// Add 5-10 bytes at the beginning and end of `in`
-	in = append(randomBytesWithLengthBetween(5, 10), in...)
-	in = append(in, randomBytesWithLengthBetween(5, 10)...)
-
-	// Randomly encrypt `in` with AES in ECB or CBC mode.
-	m := RandomInt(0, 1)
-	var out []byte
-	if m == 0 {
-		// Encrypt with AES in ECB mode.
-		out = AESEncryptECB(in, key)
-	} else {
-		// Encrypt with AES in CBC mode.
-		out = AESEncryptCBC(in, key, iv)
-	}
-	return out
-}
-
 func OracleAESEncryptECB(in []byte) []byte {
 	return AESEncryptECB(append(in, Base64ToBytes(oracleUnknown)...), oracleKey)
 }
diff --git a/lib/rand.go b/lib/rand.go
index 1ba1679..be95366 100644
--- a/lib/rand.go
+++ b/lib/rand.go
@@ -37,7 +37,7 @@ func RandomBytes(size int) ([]byte, error) {
 }
 
 // Randomly generates `min` to `max` bytes.
-func randomBytesWithLengthBetween(min, max int64) []byte {
+func RandomBytesWithLengthBetween(min, max int64) []byte {
 	bs := make([]byte, RandomInt(min, max))
 	_, err := rand.Read(bs)
 	if err != nil {