The algorithm Message Digest 5 or MD5, it is a one-way cryptographic hash function. MD5 performs many binary operations on the “message” (binary data, for example of an iso image) to compute a 128-bit “hash”. It is useful to check the integrity of a downloaded package such as ubuntu because generating the MD5 hash will … Read more
No, that’s not really possible, as there can be more than one string giving the same MD5 it was designed to be hard to “reverse” The goal of the MD5 and its family of hashing functions is to get short “extracts” from long string to make it hard to guess where they come from to … Read more
This is what I came up with. It’s an extension to String. Don’t forget to add #import <CommonCrypto/CommonCrypto.h> to the ObjC-Swift bridging header that Xcode creates. extension String { var md5: String! { let str = self.cStringUsingEncoding(NSUTF8StringEncoding) let strLen = CC_LONG(self.lengthOfBytesUsingEncoding(NSUTF8StringEncoding)) let digestLen = Int(CC_MD5_DIGEST_LENGTH) let result = UnsafeMutablePointer<CUnsignedChar>.alloc(digestLen) CC_MD5(str!, strLen, result) let hash = … Read more
edit: NB these instructions have changed slightly for the v3 API I’ve figured out a quick way to get the MD5 checksums of the files uploaded and decided to share it here, too. Log into your Google Drive account, then: Visit: https://developers.google.com/drive/v3/reference/files/list Scroll down to the Try it! section. Change “Authorize requests using OAuth 2.0” … Read more
I suggest you have a look to this SO page, CRC vs MD5/SHA1. Speed and collisions are discussed in this other thread. And as always Wikipedia is your friend. If I had to choose, there is an important question to answer: do you want that in any case there is no collision – or, at … Read more
MD5 processes an arbitrary-length message into a fixed-length output of 128 bits, typically represented as a sequence of 32 hexadecimal digits.