Generate UUID v5

Generate a name-based UUID v5 using SHA-1 hashing of namespace and name.

Code

Utilities

ns=$(echo -n "${namespace//-/}" | sed 's/../\\x&/g')
hash=$(printf "${ns}${name}" | sha1sum | cut -c1-32)
v=$(printf '%x' $(( (0x${hash:12:2} & 0x0f) | 0x50 )))${hash:14:2}
c=$(printf '%x' $(( (0x${hash:16:2} & 0x3f) | 0x80 )))${hash:18:2}
echo "${hash:0:8}-${hash:8:4}-${v}-${c}-${hash:20:12}"

Parameters

namespace(string)

Namespace UUID (use DNS, URL, OID, or X500 namespace).

name(string)

Name to hash within the namespace.

Server

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