只包括两个核心文件sha1.cpp及sha1.h

计算数据的sha1摘要。简单，好用。

由于bit endian及little endian的原因，有些计算sha1摘要的算法计算出来的结果与正确结果有差异。此源码经过测试，与RFC里列出的测试结果匹配。-only two core document sha1.cpp sha1.h calculation and data sha1 Abstract. Simple and Easy. Because bit endian and little endian of reasons, some of the Abstract sha1 calculation algorithm and the result of differences in the correct results. This source tested, and the RFC to set out the test results match.