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49 lines
824 B
49 lines
824 B
package core
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import (
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"crypto/md5"
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"encoding/hex"
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"fmt"
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)
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// The ID of en entity, in the form of an UUID.
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type VID [16]byte
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// Hash generates a MD5 hash based on current VID and a suffix string.
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func (v VID) Hash(suffix []byte) []byte {
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md5 := md5.New()
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md5.Write(v[:])
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md5.Write(suffix)
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return md5.Sum(nil)
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}
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var byteGroups = []int{8, 4, 4, 4, 12}
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// TODO: leverage a full functional UUID library
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func UUIDToVID(uuid string) (v VID, err error) {
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text := []byte(uuid)
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if len(text) < 32 {
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err = fmt.Errorf("uuid: invalid UUID string: %s", text)
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return
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}
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b := v[:]
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for _, byteGroup := range byteGroups {
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if text[0] == '-' {
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text = text[1:]
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}
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_, err = hex.Decode(b[:byteGroup/2], text[:byteGroup])
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if err != nil {
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return
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}
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text = text[byteGroup:]
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b = b[byteGroup/2:]
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}
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return
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}
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