{"id":428,"date":"2015-05-14T15:41:26","date_gmt":"2015-05-14T15:41:26","guid":{"rendered":"8d7d8ee069cb0cbbf816bbb65d56947e"},"modified":"2015-05-14T15:41:26","modified_gmt":"2015-05-14T15:41:26","slug":"","status":"publish","type":"post","link":"https:\/\/www.xiaobo.li\/notes\/archives\/428","title":{"rendered":"AES CFB\/OFB\/ECB\/CBC\/CTR"},"content":{"rendered":"

AES\u5e38\u89c1\u52a0\u5bc6\u6a21\u5f0f\u6709CFB\/OFB\/ECB\/CBC\/CTR\uff0c\u672c\u6587\u6982\u8ff0\u8fd9\u4e9b\u7b97\u6cd5\u7279\u70b9\uff0c\u8ba9\u5927\u5bb6\u66f4\u5feb\u7684\u4e86\u89e3AES\uff0c\u5f53\u7136\u5929\u7f18\u4e5f\u4e0d\u662f\u4e13\u4e1a\u505a\u7b97\u6cd5\u7684\uff0c\u5de5\u4f5c\u4e2d\u4e5f\u53ea\u662f\u4f7f\u7528\u5230\u624d\u4f1a\u5b66\u4e60\u4e00\u70b9\uff0c\u5982\u6709\u9519\u8bef\uff0c\u6b22\u8fce\u6307\u51fa\u3002<\/p>\n

\u4e00\u3001Cipher feedback\uff08CFB\uff09<\/h2>\n

CFB\u7b97\u6cd5\u4f18\u70b9\uff1a<\/p>\n

\u540c\u660e\u6587\u4e0d\u540c\u5bc6\u6587\uff0c\u5206\u7ec4\u5bc6\u94a5\u8f6c\u6362\u4e3a\u6d41\u5bc6\u7801\u3002<\/p>\n

CFB\u7b97\u6cd5\u7f3a\u70b9\uff1a<\/p>\n

\u4e32\u884c\u8fd0\u7b97\u4e0d\u5229\u5e76\u884c\uff0c\u4f20\u8f93\u9519\u8bef\u53ef\u80fd\u5bfc\u81f4\u540e\u7eed\u4f20\u8f93\u5757\u9519\u8bef\u3002<\/p>\n

\u4e8c\u3001Output feedback\uff08OFB\uff09<\/h2>\n

OFB\u7b97\u6cd5\u4f18\u70b9\uff1a<\/p>\n

\u540c\u660e\u6587\u4e0d\u540c\u5bc6\u6587\uff0c\u5206\u7ec4\u5bc6\u94a5\u8f6c\u6362\u4e3a\u6d41\u5bc6\u7801\u3002<\/p>\n

OFB\u7b97\u6cd5\u7f3a\u70b9\uff1a<\/p>\n

\u4e32\u884c\u8fd0\u7b97\u4e0d\u5229\u5e76\u884c\uff0c\u4f20\u8f93\u9519\u8bef\u53ef\u80fd\u5bfc\u81f4\u540e\u7eed\u4f20\u8f93\u5757\u9519\u8bef\u3002<\/p>\n

\u4e09\u3001Electronic codebook(ECB)<\/h2>\n

ECB\u7b97\u6cd5\u4f18\u70b9\uff1a<\/p>\n

\u7b80\u5355\u3001\u5b64\u7acb\uff0c\u6bcf\u4e2a\u5757\u5355\u72ec\u8fd0\u7b97\u3002\u9002\u5408\u5e76\u884c\u8fd0\u7b97\u3002\u4f20\u8f93\u9519\u8bef\u4e00\u822c\u53ea\u5f71\u54cd\u5f53\u524d\u5757\u3002<\/p>\n

ECB\u7b97\u6cd5\u7f3a\u70b9\uff1a<\/p>\n

\u540c\u660e\u6587\u8f93\u51fa\u540c\u5bc6\u6587\uff0c\u53ef\u80fd\u5bfc\u81f4\u660e\u6587\u653b\u51fb\u3002<\/p>\n

\u56db\u3001Cipher-block chaining\uff08CBC\uff09<\/h2>\n

CBC\u7b97\u6cd5\u4f18\u70b9\uff1a<\/p>\n

\u4e32\u884c\u5316\u8fd0\u7b97\uff0c\u76f8\u540c\u660e\u6587\u4e0d\u540c\u5bc6\u6587<\/p>\n

CBC\u7b97\u6cd5\u7f3a\u70b9\uff1a<\/p>\n

\u9700\u8981\u521d\u59cb\u5411\u91cf\uff0c\u4e0d\u8fc7\u8fd9\u5176\u5b9e\u4e0d\u7b97\u7f3a\u70b9\uff0c\u4e0b\u6587\u7684CTR\u4e5f\u662f\u9700\u8981\u968f\u673a\u6570\u7684\u3002\u5982\u679c\u51fa\u73b0\u4f20\u8f93\u9519\u8bef\uff0c\u90a3\u4e48\u540e\u7eed\u7ed3\u679c\u89e3\u5bc6\u540e\u53ef\u80fd\u5168\u90e8\u9519\u8bef\u3002<\/p>\n

\u6b64\u5916\uff0c\u8fd8\u6709Propagating cipher-block chaining\uff08PCBC\uff09\u52a0\u5bc6\u6a21\u5f0f\uff0c<\/p>\n

\u4e94\u3001Counter mode\uff08CTR\uff09<\/h2>\n

CTR\u7b97\u6cd5\u4f18\u70b9\uff1a<\/p>\n

\u65e0\u586b\u5145\uff0c\u540c\u660e\u6587\u4e0d\u540c\u5bc6\u6587\uff0c\u6bcf\u4e2a\u5757\u5355\u72ec\u8fd0\u7b97\uff0c\u9002\u5408\u5e76\u884c\u8fd0\u7b97\u3002<\/p>\n

CTR\u7b97\u6cd5\u7f3a\u70b9\uff1a<\/p>\n

\u53ef\u80fd\u5bfc\u81f4\u660e\u6587\u653b\u51fb\u3002<\/p>\n

\u8865\u5145\uff1a<\/strong><\/p>\n

\u5173\u4e8ePadding\u8865\u4f4d\u95ee\u9898\uff0c\u4e0a\u6587\u52a0\u5bc6\u6a21\u5f0f\u4e2d\uff0c\u6bd4\u5982CBC\u7b49\u5bf9\u8f93\u5165\u5757\u662f\u6709\u8981\u6c42\u7684\uff0c\u5fc5\u987b\u662f\u5757\u7684\u6574\u6570\u500d\uff0c\u5bf9\u4e0d\u662f\u6574\u5757\u7684\u6570\u636e\uff0c\u8981\u6c42\u8fdb\u884c\u586b\u5145\uff0c\u586b\u5145\u7684\u65b9\u6cd5\u6709\u5f88\u591a\u79cd\uff0c\u5e38\u89c1\u7684\u6709PKCS5\u548cPKCS7\u3001ISO10126\u7b49\u3002<\/p>\n

\u4f8b\u5982\u6309\u716716\u5b57\u8282\u5206\u7ec4\u7684\u8bdd\uff1a<\/p>\n