(s string)
| 71 | } |
| 72 | |
| 73 | func (ha HashAlgorithm) FromString(s string) (*Hash, error) { |
| 74 | var l int |
| 75 | switch ha { |
| 76 | case HashAlgorithmMD5: |
| 77 | l = 32 |
| 78 | case HashAlgorithmSHA1: |
| 79 | l = 40 |
| 80 | case HashAlgorithmSHA256: |
| 81 | l = 64 |
| 82 | default: |
| 83 | return nil, fmt.Errorf("unknown hash algorithm: %q", ha) |
| 84 | } |
| 85 | |
| 86 | if len(s) != l { |
| 87 | return nil, fmt.Errorf("invalid %q hash - unexpected length %d", ha, len(s)) |
| 88 | } |
| 89 | |
| 90 | hashValue, err := hex.DecodeString(s) |
| 91 | if err != nil { |
| 92 | return nil, fmt.Errorf("invalid hash %q - not hex", s) |
| 93 | } |
| 94 | return &Hash{Algorithm: ha, HashValue: hashValue}, nil |
| 95 | } |
| 96 | |
| 97 | func MustFromString(s string) *Hash { |
| 98 | h, err := FromString(s) |
no outgoing calls