django加密算法的glib实现.doc

django加密算法的glib实现某项目，B/S+C/S结构，B端使用django框架，C端用到了glib库，为了使C端保存的用户密码能被B端的django验证通过，需要在C端按同样算法加密原始密码。先从django中摘出其密码实现代码，如下：$ cat /tmp/a.py #! /usr/bin/env python# -*- encoding:utf-8 -*-# FileName: a.pyimport hashlibdef get_hexdigest(algorithm, salt, raw_password):Returns a string of the hexdigest of the given plaintext password and saltusing the given algorithm (md5, sha1 or crypt).if algorithm = crypt:try:import cryptexcept ImportError:raise ValueError(crypt password algorithm not supported in this environment)return crypt.crypt(raw_password, salt)if algorithm = md5:return hashlib.md5(salt + raw_password).hexdigest()elif algorithm = sha1:return hashlib.sha1(salt + raw_password).hexdigest()raise ValueError(Got unknown password algorithm type in password.)def check_password(raw_password, enc_password):Returns a boolean of whether the raw_password was correct. Handlesencryption formats behind the scenes.algo, salt, hsh = enc_password.split($)return hsh = get_hexdigest(algo, salt, raw_password)def set_password(raw_password):import randomalgo = sha1salt = get_hexdigest(algo, str(random.random(), str(random.random():5hsh = get_hexdigest(algo, salt, raw_password)password = %s$%s$%s % (algo, salt, hsh)return passwordif _name_=_main_:print check_password(abc123,sha1$42bd7$24eafbd1cb1522eea59c32ec82211be947221578)print check_password(abc123,sha1$ac016$8271fbe00ebf5191be446b895a4448b6b161a788)print check_password(abc123,sha1$2d690$aa6b6eec2dbb9bf1bf89fecab5e0e076658ab1e6)可以看到，django支持crypt、md5和sha1三种加密算法，我们只取sha1这一种即可。对照python代码，使用glib实现的代码如下：#include #include #include gchar* get_hexdigest(const gchar *salt, const gchar *raw_password)gchar *str;gchar *password;str = g_strdup_printf(%s%s, salt, raw_password);password = g_compute_checksum_for_string (G_CHECKSUM_SHA1, str, strlen(str);g_free(str);return password;gchar* set_password(const gchar *raw_password)gchar *salt;gchar *hsh;gchar *str1, *str2;gchar *password;gdouble rand;rand = g_random_double();str1 = g_strdup_printf(%g, rand);rand = g_random_double();str2 = g_strdup_printf(%g, rand);salt = get_hexdigest(str1, str2);salt5 = ;g_free(str1);g_free(str2);hsh = get_hexdigest(salt, raw_password);password = g_strdup_printf(sha1$%s$%s, salt, hsh);g_free(salt);g_free(hsh)