UUIDv3

A C implementation to generate UUID version 3 using MAC address and UNIX timestamp

UUID version 3

• Generated by hashing namespace identifier and name.
• Same namespace and name will map to the same UUID.
• But the name or namespace cannot be derived from the UUID, even if one of them is specified, except by brute force search.

C Code for generating UUIDv3

• This was done with the help of openssl and cryptographic functions in the openssl/sha.h library.
• MAC address was extracted from the sub-file system in Ubuntu.
  • Command: $cat /sys/class/net/enp0s3/address
• UNIX timestamp was extracted using time.h library with the time() function.
• Hash used - SHA256