Add examples

Author: anrossi

docs/api/QUIC_STATELESS_RETRY_CONFIG.md

@@ -54,10 +54,42 @@ Where:
 
 *Label* is the string "QUIC Stateless Retry Key" without the terminating NULL character.
 
-*Context* is the UNIX epoch timestamp in milliseconds, divided by `RotationMs`, as an 8-byte signed integer in little-endian format.
+*Context* is the UNIX epoch timestamp in milliseconds, as an 8-byte signed integer in little-endian format, divided by `RotationMs`, rounded down.
 
 *L* is the same as the key length for the `Algorithm`.
 
+### Example 1 - AES-GCM 256
+
+`Secret` is the following value: 0x3edc6b5b8f7aadbd713732b482b8f979286e1ea3b8f8f99c30c884cfe3349b83.
+
+`SecretLength` is 32.
+
+`RotationMs` is 30000.
+
+`Algorithm` is **QUIC_AEAD_ALGORITHM_AES_256_GCM**.
+
+The UNIX epoch timestamp is 1752112221.
+
+Therefore, *Context* = timestamp / `RotationMs` = `1752112221 / 30000` = 58403.
+
+The generated key should be the following value : 0x8135A3ACD2FB4B2B6D7CDD9C36ACB0A182F725F52C641F4A1F21AB53CD63F9B1.
+
+### Example 2 - AES-GCM 128
+
+`Secret` is the following value: 0x5ddd79f7b33f1f4a6dd57c34a8eec42e.
+
+`SecretLength` is 16.
+
+`RotationMs` is 30000.
+
+`Algorithm` is **QUIC_AEAD_ALGORITHM_AES_128_GCM**.
+
+The UNIX epoch timestamp is 1752112221.
+
+Therefore, *Context* = timestamp / `RotationMs` = `1752112221 / 30000` = 58403.
+
+The generated key should be the following value: 0x44B08A21DC20D6297328C6B356354502
+
 
 # See Also