一个用纯C写的RSA_SHA1数字签名库，可以在各个平台下编译成功，不需要任何其它的包依赖，便于移植，适合对信安有兴趣的朋友学习 PS：刚才有个相同的包上传后没有显示，不知道是不是bug..小修改后重新上传

用于蜂窝宽带的流和文件的RC5加密程序.包含数字签名,消息加扰等功能.-RC5 is a block cipher that was originally designed by Ronald Rivest (http://theory.lcs.mit.edu/~cis/pubs/rivest/rc5.ps). We have implemented and optimized the RC5 encryption/decryption library for the Sony-Toshiba-