Add bcrypt and aes crypto lib

Signed-off-by: Asai Neko <sugar@sne.moe>

internal/cryptography/bcrypt.go

@@ -0,0 +1,22 @@
+package cryptography
+
+import "golang.org/x/crypto/bcrypt"
+
+func BcryptHash(input string) (string, error) {
+	hash, err := bcrypt.GenerateFromPassword(
+		[]byte(input),
+		bcrypt.DefaultCost,
+	)
+	if err != nil {
+		return "", err
+	}
+	return string(hash), nil
+}
+
+func BcryptVerify(input string, hashed string) bool {
+	err := bcrypt.CompareHashAndPassword(
+		[]byte(hashed),
+		[]byte(input),
+	)
+	return err == nil
+}