60 lines
1.4 KiB
Go
60 lines
1.4 KiB
Go
/*
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* Copyright 2026 Oleg Borodin <onborodin@gmail.com>
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*
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* This work is published and licensed under a Creative Commons
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* Attribution-NonCommercial-NoDerivatives 4.0 International License.
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*
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* Distribution of this work is permitted, but commercial use and
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* modifications are strictly prohibited.
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*/
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package operator
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import (
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"encoding/hex"
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"strings"
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)
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const sha256prefix = "sha256:"
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const sha512prefix = "sha512:"
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func normalizeSHADigest(digest string) string {
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if stringLikeSHA256Digest(digest) && !strings.HasPrefix(digest, sha256prefix) {
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digest = sha256prefix + digest
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} else if stringLikeSHA512Digest(digest) && !strings.HasPrefix(digest, sha512prefix) {
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digest = sha512prefix + digest
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}
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return digest
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}
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func stringLikeSHADigest(some string) bool {
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return stringLikeSHA256Digest(some) || stringLikeSHA512Digest(some)
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}
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func stringLikeSHA256Digest(some string) bool {
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if strings.HasPrefix(some, sha256prefix) {
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some = strings.TrimPrefix(some, sha256prefix)
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}
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_, err := hex.DecodeString(some)
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if err != nil {
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return false
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}
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if len(some) == 64 {
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return true
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}
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return false
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}
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func stringLikeSHA512Digest(some string) bool {
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if strings.HasPrefix(some, sha512prefix) {
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some = strings.TrimPrefix(some, sha512prefix)
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}
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_, err := hex.DecodeString(some)
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if err != nil {
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return false
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}
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if len(some) == 128 {
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return true
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}
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return false
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}
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