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linux数据库中使用MD5加密

时间：2021-07-01 10:21:17 帮助过：22人阅读

MD5Str(char *input, unsigned char *output); 参数： input：要加密的数据 output:加密后的数据

 

程序mysqlite3.c如下：

技术分享图片 
  1. <span style="color: #008080">  1</span> #include <sqlite3.h>
  2. <span style="color: #008080">  2</span> #include <stdio.h>
  3. <span style="color: #008080">  3</span> #include <<span style="color: #0000ff">string</span>.h>
  4. <span style="color: #008080">  4</span> #include <span style="color: #800000">"</span><span style="color: #800000">md5.h</span><span style="color: #800000">"</span>
  5. <span style="color: #008080">  5</span> 
  6. <span style="color: #008080">  6</span> <span style="color: #008000">/*</span><span style="color: #008000">定义此宏时使用回调函数查询否则只是用非回调函数查询</span><span style="color: #008000">*/</span>
  7. <span style="color: #008080">  7</span> <span style="color: #008000">//</span><span style="color: #008000">#define CALLBACK </span>
  8. <span style="color: #008080">  8</span> 
  9. <span style="color: #008080">  9</span> <span style="color: #008000">/*</span><span style="color: #008000">定义创建表格指令IF not EXISTS：不存在，AUTOINCREMENT：自动增加主键，not NULL：不能为空</span><span style="color: #008000">*/</span>
  10. <span style="color: #008080"> 10</span> <span style="color: #0000ff">#define</span> CREATE "create table IF not EXISTS passwd(id integer primary key AUTOINCREMENT,username text not NULL,password text not NULL)"
  11. <span style="color: #008080"> 11</span> <span style="color: #008000">/*</span><span style="color: #008000">定义查询数据指令</span><span style="color: #008000">*/</span>
  12. <span style="color: #008080"> 12</span> <span style="color: #0000ff">#define</span> SELECT "select * from passwd where username=‘%s‘ and password=‘%s‘"
  13. <span style="color: #008080"> 13</span> <span style="color: #008000">/*</span><span style="color: #008000">定义插入数据指令</span><span style="color: #008000">*/</span>
  14. <span style="color: #008080"> 14</span> <span style="color: #0000ff">#define</span> INSERT "insert into passwd(username,password) values(‘%s‘,‘%s‘)"
  15. <span style="color: #008080"> 15</span> 
  16. <span style="color: #008080"> 16</span> <span style="color: #008000">/*</span><span style="color: #008000">如果查询到多行数据， 那么这个函数就会调用多次（每一行调用一次）</span><span style="color: #008000">*/</span>
  17. <span style="color: #008080"> 17</span> <span style="color: #0000ff">int</span> callback(<span style="color: #0000ff">void</span> *arg, <span style="color: #0000ff">int</span> col, <span style="color: #0000ff">char</span> **value, <span style="color: #0000ff">char</span> **<span style="color: #000000">name)
  18. </span><span style="color: #008080"> 18</span> <span style="color: #000000">{
  19. </span><span style="color: #008080"> 19</span>     <span style="color: #0000ff">int</span> i=<span style="color: #800080">0</span><span style="color: #000000">;
  20. </span><span style="color: #008080"> 20</span>     <span style="color: #0000ff">for</span>(i=<span style="color: #800080">0</span>;i<col; i++<span style="color: #000000">)
  21. </span><span style="color: #008080"> 21</span> <span style="color: #000000">    {
  22. </span><span style="color: #008080"> 22</span>         printf(<span style="color: #800000">"</span><span style="color: #800000">%s\t</span><span style="color: #800000">"</span><span style="color: #000000">, value[i]);
  23. </span><span style="color: #008080"> 23</span> <span style="color: #000000">    }
  24. </span><span style="color: #008080"> 24</span>     printf(<span style="color: #800000">"</span><span style="color: #800000">\n</span><span style="color: #800000">"</span><span style="color: #000000">);
  25. </span><span style="color: #008080"> 25</span>     <span style="color: #0000ff">return</span> <span style="color: #800080">0</span><span style="color: #000000">;
  26. </span><span style="color: #008080"> 26</span> <span style="color: #000000">}
  27. </span><span style="color: #008080"> 27</span> 
  28. <span style="color: #008080"> 28</span> 
  29. <span style="color: #008080"> 29</span> <span style="color: #0000ff">int</span> main(<span style="color: #0000ff">void</span><span style="color: #000000">)
  30. </span><span style="color: #008080"> 30</span> <span style="color: #000000">{
  31. </span><span style="color: #008080"> 31</span>     
  32. <span style="color: #008080"> 32</span>     <span style="color: #008000">//</span><span style="color: #008000">1.打开数据库</span>
  33. <span style="color: #008080"> 33</span>     sqlite3 *ppdb =<span style="color: #000000"> NULL;
  34. </span><span style="color: #008080"> 34</span>     <span style="color: #0000ff">int</span> ret = sqlite3_open(<span style="color: #800000">"</span><span style="color: #800000">./passwd</span><span style="color: #800000">"</span>, &ppdb); <span style="color: #008000">/*</span><span style="color: #008000">我们之前要先创建一个名字叫passwd的数据库</span><span style="color: #008000">*/</span>
  35. <span style="color: #008080"> 35</span>     <span style="color: #0000ff">if</span>(ret !=<span style="color: #000000"> SQLITE_OK)
  36. </span><span style="color: #008080"> 36</span> <span style="color: #000000">    {
  37. </span><span style="color: #008080"> 37</span>         perror(<span style="color: #800000">"</span><span style="color: #800000">open fail</span><span style="color: #800000">"</span><span style="color: #000000">);
  38. </span><span style="color: #008080"> 38</span>         <span style="color: #0000ff">return</span> -<span style="color: #800080">1</span><span style="color: #000000">;
  39. </span><span style="color: #008080"> 39</span> <span style="color: #000000">    }
  40. </span><span style="color: #008080"> 40</span>     sqlite3_exec(ppdb,CREATE,NULL,NULL,NULL); <span style="color: #008000">/*</span><span style="color: #008000">创建一个表格</span><span style="color: #008000">*/</span>
  41. <span style="color: #008080"> 41</span>     <span style="color: #0000ff">char</span> temp[<span style="color: #800080">32</span><span style="color: #000000">];
  42. </span><span style="color: #008080"> 42</span>     <span style="color: #0000ff">char</span> temp1[<span style="color: #800080">32</span><span style="color: #000000">];
  43. </span><span style="color: #008080"> 43</span>     <span style="color: #0000ff">char</span> insert[strlen(temp)+strlen(temp1)+<span style="color: #800080">200</span>]; <span style="color: #008000">/*</span><span style="color: #008000">这里的数组要给大一点，因为等下加密的时候会得到一串很长的数据</span><span style="color: #008000">*/</span>
  44. <span style="color: #008080"> 44</span>     printf(<span style="color: #800000">"</span><span style="color: #800000">please input your username:</span><span style="color: #800000">"</span><span style="color: #000000">);
  45. </span><span style="color: #008080"> 45</span>     scanf(<span style="color: #800000">"</span><span style="color: #800000">%s</span><span style="color: #800000">"</span><span style="color: #000000">,temp);
  46. </span><span style="color: #008080"> 46</span>     printf(<span style="color: #800000">"</span><span style="color: #800000">please input your password:</span><span style="color: #800000">"</span><span style="color: #000000">);
  47. </span><span style="color: #008080"> 47</span>     scanf(<span style="color: #800000">"</span><span style="color: #800000">%s</span><span style="color: #800000">"</span><span style="color: #000000">,temp1);
  48. </span><span style="color: #008080"> 48</span>     MD5Str(temp1,temp1);<span style="color: #008000">/*</span><span style="color: #008000">把输入的密码使用md5加密存储在数据库表格中</span><span style="color: #008000">*/</span>
  49. <span style="color: #008080"> 49</span>     printf(<span style="color: #800000">"</span><span style="color: #800000">1111\n</span><span style="color: #800000">"</span><span style="color: #000000">);
  50. </span><span style="color: #008080"> 50</span>     
  51. <span style="color: #008080"> 51</span>     
  52. <span style="color: #008080"> 52</span>     sprintf(insert,INSERT,temp,temp1);<span style="color: #008000">/*</span><span style="color: #008000">打包数据，准备插入到表格中</span><span style="color: #008000">*/</span>
  53. <span style="color: #008080"> 53</span>     
  54. <span style="color: #008080"> 54</span> <span style="color: #000000">    sqlite3_exec(ppdb,insert,NULL,NULL,NULL);
  55. </span><span style="color: #008080"> 55</span>     
  56. <span style="color: #008080"> 56</span>     
  57. <span style="color: #008080"> 57</span>     <span style="color: #0000ff">char</span> username[<span style="color: #800080">32</span><span style="color: #000000">];
  58. </span><span style="color: #008080"> 58</span>     <span style="color: #0000ff">char</span> password[<span style="color: #800080">33</span><span style="color: #000000">];
  59. </span><span style="color: #008080"> 59</span>     printf(<span style="color: #800000">"</span><span style="color: #800000">input username:</span><span style="color: #800000">"</span><span style="color: #000000">);
  60. </span><span style="color: #008080"> 60</span>     scanf(<span style="color: #800000">"</span><span style="color: #800000">%s</span><span style="color: #800000">"</span><span style="color: #000000">,username);
  61. </span><span style="color: #008080"> 61</span>     printf(<span style="color: #800000">"</span><span style="color: #800000">input password:</span><span style="color: #800000">"</span><span style="color: #000000">);
  62. </span><span style="color: #008080"> 62</span>     scanf(<span style="color: #800000">"</span><span style="color: #800000">%s</span><span style="color: #800000">"</span><span style="color: #000000">,password);
  63. </span><span style="color: #008080"> 63</span>     
  64. <span style="color: #008080"> 64</span>     MD5Str(password,password);<span style="color: #008000">/*</span><span style="color: #008000">把输入的密码使用md5加密之后与数据库表格中的密码匹对</span><span style="color: #008000">*/</span>
  65. <span style="color: #008080"> 65</span>     <span style="color: #0000ff">char</span> sql[strlen(SELECT)+strlen(username)+<span style="color: #000000">strlen(password)];
  66. </span><span style="color: #008080"> 66</span>     
  67. <span style="color: #008080"> 67</span>     <span style="color: #008000">/*</span><span style="color: #008000">打包一个字符串，将SELECT字符串放到sql中，username和password这两个变量放大SELECT中</span><span style="color: #008000">*/</span>
  68. <span style="color: #008080"> 68</span> <span style="color: #000000">    sprintf(sql,SELECT,username,password);
  69. </span><span style="color: #008080"> 69</span> 
  70. <span style="color: #008080"> 70</span> 
  71. <span style="color: #008080"> 71</span> <span style="color: #000000">    #ifdef CALLBACK
  72. </span><span style="color: #008080"> 72</span>     <span style="color: #008000">//</span><span style="color: #008000">回调查询</span>
  73. <span style="color: #008080"> 73</span>     <span style="color: #0000ff">char</span> *selectsql = <span style="color: #800000">"</span><span style="color: #800000">select * from myname</span><span style="color: #800000">"</span><span style="color: #000000">;
  74. </span><span style="color: #008080"> 74</span>     ret =<span style="color: #000000"> sqlite3_exec(ppdb, selectsql, callback, NULL, NULL);
  75. </span><span style="color: #008080"> 75</span>     <span style="color: #0000ff">if</span>(ret !=<span style="color: #000000"> SQLITE_OK)
  76. </span><span style="color: #008080"> 76</span> <span style="color: #000000">    {
  77. </span><span style="color: #008080"> 77</span>         perror(<span style="color: #800000">"</span><span style="color: #800000">create fail</span><span style="color: #800000">"</span><span style="color: #000000">);
  78. </span><span style="color: #008080"> 78</span> <span style="color: #000000">        sqlite3_close(ppdb);
  79. </span><span style="color: #008080"> 79</span>         <span style="color: #0000ff">return</span> -<span style="color: #800080">1</span><span style="color: #000000">;
  80. </span><span style="color: #008080"> 80</span> <span style="color: #000000">    }
  81. </span><span style="color: #008080"> 81</span>     
  82. <span style="color: #008080"> 82</span>     <span style="color: #008000">//</span><span style="color: #008000">非回调查询</span>
  83. <span style="color: #008080"> 83</span>     <span style="color: #0000ff">#else</span>
  84. <span style="color: #008080"> 84</span>     <span style="color: #0000ff">char</span> **result =<span style="color: #000000"> NULL;
  85. </span><span style="color: #008080"> 85</span>     <span style="color: #0000ff">int</span> row = <span style="color: #800080">0</span><span style="color: #000000">;
  86. </span><span style="color: #008080"> 86</span>     <span style="color: #0000ff">int</span> col = <span style="color: #800080">0</span><span style="color: #000000">;
  87. </span><span style="color: #008080"> 87</span>     <span style="color: #0000ff">char</span> *error  =<span style="color: #000000"> NULL;
  88. </span><span style="color: #008080"> 88</span>     ret = sqlite3_get_table(ppdb,sql,&result,&row,&col,&<span style="color: #000000">error);
  89. </span><span style="color: #008080"> 89</span>     <span style="color: #0000ff">if</span>(ret !=<span style="color: #000000"> SQLITE_OK)
  90. </span><span style="color: #008080"> 90</span> <span style="color: #000000">    {
  91. </span><span style="color: #008080"> 91</span>         perror(<span style="color: #800000">"</span><span style="color: #800000">get table fail</span><span style="color: #800000">"</span><span style="color: #000000">);
  92. </span><span style="color: #008080"> 92</span>         <span style="color: #0000ff">return</span> -<span style="color: #800080">1</span><span style="color: #000000">;
  93. </span><span style="color: #008080"> 93</span> <span style="color: #000000">    }
  94. </span><span style="color: #008080"> 94</span>     
  95. <span style="color: #008080"> 95</span>     <span style="color: #0000ff">int</span> i=<span style="color: #800080">0</span>, j=<span style="color: #800080">0</span><span style="color: #000000">;
  96. </span><span style="color: #008080"> 96</span>     <span style="color: #0000ff">for</span>(i=<span style="color: #800080">0</span>;i<row+<span style="color: #800080">1</span>;i++<span style="color: #000000">)
  97. </span><span style="color: #008080"> 97</span> <span style="color: #000000">    {
  98. </span><span style="color: #008080"> 98</span>         <span style="color: #0000ff">for</span>(j=<span style="color: #800080">0</span>;j<col;j++<span style="color: #000000">)
  99. </span><span style="color: #008080"> 99</span> <span style="color: #000000">        {
  100. </span><span style="color: #008080">100</span>             printf(<span style="color: #800000">"</span><span style="color: #800000">%s\t</span><span style="color: #800000">"</span>,result[j+i*<span style="color: #000000">col]);
  101. </span><span style="color: #008080">101</span> <span style="color: #000000">        }
  102. </span><span style="color: #008080">102</span>         printf(<span style="color: #800000">"</span><span style="color: #800000">\n</span><span style="color: #800000">"</span><span style="color: #000000">);
  103. </span><span style="color: #008080">103</span> <span style="color: #000000">    }
  104. </span><span style="color: #008080">104</span>     
  105. <span style="color: #008080">105</span>     <span style="color: #0000ff">if</span>(row > <span style="color: #800080">0</span>) <span style="color: #008000">/*</span><span style="color: #008000">数据匹配成功</span><span style="color: #008000">*/</span>
  106. <span style="color: #008080">106</span>         printf(<span style="color: #800000">"</span><span style="color: #800000">checked OK\n</span><span style="color: #800000">"</span><span style="color: #000000">);
  107. </span><span style="color: #008080">107</span>     <span style="color: #0000ff">else</span>  <span style="color: #008000">/*</span><span style="color: #008000">数据匹配失败</span><span style="color: #008000">*/</span>
  108. <span style="color: #008080">108</span>         printf(<span style="color: #800000">"</span><span style="color: #800000">fail\n</span><span style="color: #800000">"</span><span style="color: #000000">);
  109. </span><span style="color: #008080">109</span>     sqlite3_free_table(result);<span style="color: #008000">//</span><span style="color: #008000">释放结果</span>
  110. <span style="color: #008080">110</span>     <span style="color: #0000ff">#endif</span>
  111. <span style="color: #008080">111</span>     
  112. <span style="color: #008080">112</span> 
  113. <span style="color: #008080">113</span> <span style="color: #000000">    sqlite3_close(ppdb);
  114. </span><span style="color: #008080">114</span>     <span style="color: #0000ff">return</span> <span style="color: #800080">0</span><span style="color: #000000">;
  115. </span><span style="color: #008080">115</span> }
View Code

我们先要创建一个名字叫passwd数据库，如果不懂创建可以看看我的这篇文章：linux数据库环境搭建

  1. sqlite3 passwd

接着我们编译程序

  1. gcc -o mysqlite3 mysqlite3.c -lsqlite3 -lmd5

　

运行结果如下：

技术分享图片

 

linux数据库中使用MD5加密

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