What is the maximum length of the string that can have md5 hashed? Or: If it has no limit, and if so what will be the max length of the md5 output value?
10 Answers
md5 algorithm appends the message length to the last 64 bits of the last block, thus it would be fair to say that the message can be 2^64 bits long (18 e18 bits).
Max length for MD5 input : largest definable and usable stream of bit A stream of bit definition constraints can depend on operating system, hardware constraints, programming language and more...
Length for MD5 output : Fixed-length always 128 bits For easier display, they are usually displayed in hex, which because each hex digit (0-1-2-3-4-5-6-7-8-9-A-B-C-D-E-F) takes up 4 bits of space, so its output can be displayed as 32 hex digits. 128 bits = 16 bytes = 32 hex digits
The md5 output is always 32 characters.Therefore, when setting character limit for the password in the database, do not give a value below 32 characters. If you give a value below 32, the password will be incompletely recorded in the database and therefore users will encounter an error while logging into the system.
Related