basic implementation of the cryptographic stuff

1 files changed, 43 insertions, 0 deletions

diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 0000000..8ebbfcd
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,43 @@
+#[derive(Debug, snafu::Snafu)]
+#[snafu(visibility = "pub")]
+pub enum Error {
+    #[snafu(display("failed to create block mode decryptor: {}", source))]
+    CreateBlockMode {
+        source: block_modes::InvalidKeyIvLength,
+    },
+
+    #[snafu(display("failed to decrypt: {}", source))]
+    Decrypt { source: block_modes::BlockModeError },
+
+    // no Error impl
+    // #[snafu(display("failed to expand with hkdf: {}", source))]
+    // HkdfExpand { source: hkdf::InvalidLength },
+    #[snafu(display("failed to expand with hkdf"))]
+    HkdfExpand,
+
+    // no Error impl
+    // #[snafu(display("failed to create hkdf: {}", source))]
+    // HkdfFromPrk { source: hkdf::InvalidPrkLength },
+    #[snafu(display("failed to create hkdf"))]
+    HkdfFromPrk,
+
+    #[snafu(display("invalid base64: {}", source))]
+    InvalidBase64 { source: base64::DecodeError },
+
+    #[snafu(display("invalid cipherstring"))]
+    InvalidCipherString,
+
+    #[snafu(display("invalid mac"))]
+    InvalidMac,
+
+    // no Error impl
+    // #[snafu(display("invalid mac key: {}", source))]
+    // InvalidMacKey { source: hmac::crypto_mac::InvalidKeyLength },
+    #[snafu(display("invalid mac key"))]
+    InvalidMacKey,
+
+    #[snafu(display("error making api request: {}", source))]
+    Reqwest { source: reqwest::Error },
+}
+
+pub type Result<T> = std::result::Result<T, Error>;