iOS之SHA1算法

ios之sha1算法。

#import

+ (nsstring *)sha1:(nsstring *)inputstring{

nsdata *data = [inputstring datausingencoding:nsutf8stringencoding];

uint8_t digest[cc_sha1_digest_length];

cc_sha1(data.bytes,(unsigned int)data.length,digest);

nsmutablestring *outputstring = [nsmutablestring stringwithcapacity:cc_sha1_digest_length];

 

for (int i = 0; i < cc_sha1_digest_length; i++) {

[outputstring appendformat:@"%02x",digest[i]];

}

return [outputstring lowercasestring];

}