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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| package hash | ||
|
|
||
| import ( | ||
| "encoding/binary" | ||
| "fmt" | ||
| "math" | ||
| "reflect" | ||
|
|
||
| yamlk8s "sigs.k8s.io/yaml" | ||
| ) | ||
|
|
||
| type encoder func(v any) ([]byte, error) | ||
|
|
||
| func boolEncoder(v any) ([]byte, error) { | ||
| if reflect.ValueOf(v).Bool() { | ||
| return []byte{1}, nil | ||
| } | ||
| return []byte{0}, nil | ||
| } | ||
|
|
||
| func intEncoder(v any) ([]byte, error) { | ||
| vt := reflect.ValueOf(v) | ||
| return binary.AppendVarint([]byte{}, vt.Int()), nil | ||
| } | ||
|
|
||
| func uintEncoder(v any) ([]byte, error) { | ||
| vt := reflect.ValueOf(v) | ||
| return binary.AppendUvarint([]byte{}, vt.Uint()), nil | ||
| } | ||
|
|
||
| func floatEncoder(v any) ([]byte, error) { | ||
| vt := reflect.ValueOf(v) | ||
| return uintEncoder(math.Float64bits(vt.Float())) | ||
| } | ||
|
|
||
| func stringEncoder(v any) ([]byte, error) { | ||
| vt := reflect.ValueOf(v) | ||
| return []byte(vt.String()), nil | ||
| } | ||
|
|
||
| func structEncoder(v any) ([]byte, error) { | ||
| b, err := yamlk8s.Marshal(v) | ||
| return b, err | ||
| } | ||
|
|
||
| func getEncoder(v any) (encoder, error) { | ||
| t := reflect.Indirect(reflect.ValueOf(v)) | ||
|
|
||
| switch t.Kind() { | ||
| case reflect.Bool: | ||
| return boolEncoder, nil | ||
| case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: | ||
| return intEncoder, nil | ||
| case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64: | ||
| return uintEncoder, nil | ||
| case reflect.Float32, reflect.Float64: | ||
| return floatEncoder, nil | ||
| case reflect.String: | ||
| return stringEncoder, nil | ||
| case reflect.Struct, reflect.Map, reflect.Slice, reflect.Array: | ||
| return structEncoder, nil | ||
| } | ||
| return nil, fmt.Errorf("encoder for type %s not supported", t.Kind().String()) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| package hash | ||
|
|
||
| import ( | ||
| "encoding/hex" | ||
| "fmt" | ||
| "strings" | ||
| ) | ||
|
|
||
| type Algorithm string | ||
|
|
||
| const ( | ||
| hashStringSeparator string = "=" | ||
| ) | ||
|
|
||
| type sumFunc func(in []byte) []byte | ||
|
|
||
| var sumProviders map[Algorithm]sumFunc = map[Algorithm]sumFunc{} | ||
|
|
||
| func registerProvider(alg Algorithm, provider sumFunc) { | ||
| sumProviders[alg] = provider | ||
| } | ||
|
|
||
| func ToHashString(alg Algorithm, source any) (string, error) { | ||
| sum, found := sumProviders[alg] | ||
| if !found { | ||
| return "", fmt.Errorf("hash algorithm %s not found", alg) | ||
| } | ||
|
|
||
| encode, err := getEncoder(source) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| b, err := encode(source) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| hashBytes := sum(b) | ||
| return joinToHashString(alg, hex.EncodeToString(hashBytes)), nil | ||
| } | ||
|
|
||
| func CompareWithHashString(source any, targetHashString string) (bool, error) { | ||
| alg := extractAlgorithmFromHashString(targetHashString) | ||
| sourceHashString, err := ToHashString(alg, source) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| return targetHashString == sourceHashString, nil | ||
| } | ||
|
|
||
| func joinToHashString(alg Algorithm, hash string) string { | ||
| return fmt.Sprintf("%s%s%s", alg, hashStringSeparator, hash) | ||
| } | ||
|
|
||
| func extractAlgorithmFromHashString(hashString string) Algorithm { | ||
| parts := strings.Split(hashString, hashStringSeparator) | ||
| if len(parts) != 2 { | ||
| return "" | ||
| } | ||
| return Algorithm(parts[0]) | ||
| } |
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