iOS开发MD5、SHA1

MD5:

+ (NSString *)md5:(NSString *)input {

const char *cStr = [input UTF8String];

unsigned char digest[CC_MD5_DIGEST_LENGTH];

CC_MD5( cStr, (CC_LONG)strlen(cStr), digest );

NSMutableString *output = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];

for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++){

[output appendFormat:@"%02x", digest[i]];

}

return  output;

}

SHA1:

+ (NSString *) sha1:(NSString *)input

{

const char *cstr = [input cStringUsingEncoding:NSUTF8StringEncoding];

NSData *data = [NSData dataWithBytes:cstr length:input.length];

uint8_t digest[CC_SHA1_DIGEST_LENGTH];

CC_SHA1(data.bytes, (unsigned int)data.length, digest);

NSMutableString *output = [NSMutableString stringWithCapacity:CC_SHA1_DIGEST_LENGTH * 2];

for(int i=0; i<CC_SHA1_DIGEST_LENGTH; i++) {

[output appendFormat:@"%02x", digest[i]];

}

return output;

}