1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
package md5crypt
import (
"fmt"
"github.com/go-crypt/crypt/algorithm"
)
// Opt describes the functional option pattern for the md5crypt.Hasher.
type Opt func(h *Hasher) (err error)
// WithVariant is used to configure the md5crypt.Variant of the resulting md5crypt.Digest.
// Default is md5crypt.VariantStandard.
func WithVariant(variant Variant) Opt {
return func(h *Hasher) (err error) {
switch variant {
case VariantNone:
return nil
case VariantStandard, VariantSun:
h.variant = variant
return nil
default:
return fmt.Errorf(algorithm.ErrFmtHasherValidation, AlgName, fmt.Errorf("%w: variant '%d' is invalid", algorithm.ErrParameterInvalid, variant))
}
}
}
// WithVariantName uses the variant name or identifier to configure the md5crypt.Variant of the resulting md5crypt.Digest.
// Default is md5crypt.VariantStandard.
func WithVariantName(identifier string) Opt {
return func(h *Hasher) (err error) {
if identifier == "" {
return nil
}
variant := NewVariant(identifier)
if variant == VariantNone {
return fmt.Errorf(algorithm.ErrFmtHasherValidation, AlgName, fmt.Errorf("%w: variant identifier '%s' is invalid", algorithm.ErrParameterInvalid, identifier))
}
h.variant = variant
return nil
}
}
// WithIterations sets the iterations parameter of the resulting md5crypt.Digest. Only valid for the Sun variant. This
// is encoded in the hash with the 'iterations' parameter.
// Minimum is 0, Maximum is 4294967295. Default is 34000.
func WithIterations(iterations uint32) Opt {
return func(h *Hasher) (err error) {
if iterations < IterationsMin || iterations > IterationsMax {
return fmt.Errorf(algorithm.ErrFmtHasherValidation, AlgName, fmt.Errorf(algorithm.ErrFmtInvalidIntParameter, algorithm.ErrParameterInvalid, "iterations", IterationsMin, "", IterationsMax, iterations))
}
h.iterations = iterations
return nil
}
}
// WithRounds is an alias for md5crypt.WithIterations.
func WithRounds(rounds uint32) Opt {
return WithIterations(rounds)
}
// WithSaltLength adjusts the salt size (in bytes) of the resulting md5crypt.Digest.
// Minimum is 1, Maximum is 8. Default is 8.
func WithSaltLength(bytes int) Opt {
return func(h *Hasher) (err error) {
if bytes < SaltLengthMin || bytes > SaltLengthMax {
return fmt.Errorf(algorithm.ErrFmtHasherValidation, AlgName, fmt.Errorf(algorithm.ErrFmtInvalidIntParameter, algorithm.ErrParameterInvalid, "salt length", SaltLengthMin, "", SaltLengthMax, bytes))
}
h.bytesSalt = bytes
return nil
}
}
|
