From 418fc4dccf3f22e0d79729f812743ba7b1116611 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BE=90=E6=B6=9B?= <midnite@outlook.com>
Date: Thu, 29 Jun 2023 15:56:36 +0800
Subject: [PATCH] =?UTF-8?q?feat(verify):=E5=A2=9E=E5=8A=A0=E7=94=9F?=
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---
 README.md               |  2 +-
 src/verifiy_code/mod.rs | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 9a49b13..3cf97a7 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ Rust 中可以使用的常用辅助功能工具箱。主要配备以下功能：
 - 签名算法
   - [ ] RSA 签名算法
 - 验证码生成器
-  - [ ] 随机验证码生成算法
+  - [x] 随机验证码生成算法
 - 序列化算法
   - [x] Base64 算法
   - [x] Hex 直转
diff --git a/src/verifiy_code/mod.rs b/src/verifiy_code/mod.rs
index e69de29..d72a78e 100644
--- a/src/verifiy_code/mod.rs
+++ b/src/verifiy_code/mod.rs
@@ -0,0 +1,19 @@
+use rand::{seq::SliceRandom, thread_rng};
+
+const RAND_STR_SRC: &str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
+
+/// 生成一个指定长度的随机验证码。
+///
+/// - `n`：要生成的验证码长度。
+pub fn random_verify_code(n: usize) -> Box<String> {
+    let choices = RAND_STR_SRC.as_bytes();
+    let mut rng = thread_rng();
+    let mut code: Vec<String> = vec![];
+    while code.len() < n {
+        match choices.choose(&mut rng) {
+            Some(c) => code.push(String::from_utf8(vec![*c]).unwrap()),
+            None => continue,
+        }
+    }
+    Box::from(code.join(""))
+}