为生成的 IMEI 增加校验位 (#1855)

* feat: luhn * fix: China Country Code 86 * fix: China Country Code 86 * fix: China Country Code 86
2025-02-26 12:10:13 +08:00 · 2022-02-12 20:47:19 +08:00 · 2022-02-12 20:47:19 +08:00 · cadb529588
commit cadb529588
parent d2505a397d
1 changed files with 19 additions and 1 deletions
--- a/mirai-core-api/src/commonMain/kotlin/utils/DeviceInfo.kt
+++ b/mirai-core-api/src/commonMain/kotlin/utils/DeviceInfo.kt
@ -152,10 +152,28 @@ public class DeviceInfo(
                wifiBSSID = "02:00:00:00:00:00".toByteArray(),
                wifiSSID = "<unknown ssid>".toByteArray(),
                imsiMd5 = getRandomByteArray(16, random).md5(),
-                imei = getRandomIntString(15, random),
+                imei = "86${getRandomIntString(12, random)}".let { it + luhn(it) },
                apn = "wifi".toByteArray()
            )
        }
+
+        /**
+         * 计算 imei 校验位
+         */
+        private fun luhn(imei: String): Int {
+            var odd = false
+            val zero = '0'
+            val sum = imei.sumOf { char ->
+                odd = !odd
+                if (odd) {
+                    char.code - zero.code
+                } else {
+                    val s = (char.code - zero.code) * 2
+                    s % 10 + s / 10
+                }
+            }
+            return (10 - sum % 10) % 10
+        }
    }

    /**