Initial commit

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/cipher_suites.rs

@@ -0,0 +1,26 @@
+use crate::parse_buffer::{ParseBuffer, ParseError};
+
+#[derive(Copy, Clone, Debug)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
+pub enum CipherSuite {
+    TlsAes128GcmSha256 = 0x1301,
+    TlsAes256GcmSha384 = 0x1302,
+    TlsChacha20Poly1305Sha256 = 0x1303,
+    TlsAes128CcmSha256 = 0x1304,
+    TlsAes128Ccm8Sha256 = 0x1305,
+    TlsPskAes128GcmSha256 = 0x00A8,
+}
+
+impl CipherSuite {
+    pub fn parse(buf: &mut ParseBuffer) -> Result<Self, ParseError> {
+        match buf.read_u16()? {
+            v if v == Self::TlsAes128GcmSha256 as u16 => Ok(Self::TlsAes128GcmSha256),
+            v if v == Self::TlsAes256GcmSha384 as u16 => Ok(Self::TlsAes256GcmSha384),
+            v if v == Self::TlsChacha20Poly1305Sha256 as u16 => Ok(Self::TlsChacha20Poly1305Sha256),
+            v if v == Self::TlsAes128CcmSha256 as u16 => Ok(Self::TlsAes128CcmSha256),
+            v if v == Self::TlsAes128Ccm8Sha256 as u16 => Ok(Self::TlsAes128Ccm8Sha256),
+            v if v == Self::TlsPskAes128GcmSha256 as u16 => Ok(Self::TlsPskAes128GcmSha256),
+            _ => Err(ParseError::InvalidData),
+        }
+    }
+}