通过vc,MFC方式实现了 sha1,sha224,sha256,sha384,sha512的算法，计算原文可以使用字符串和文件。提供字符大小写转换功能-In vc, MFC way to achieve the sha1, sha224, sha256, sha384, sha512 the algorithm to calculate the original strings and files can be used. Character case conversion functions