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Add attribution to pkg/util/pki/asn1_util.go

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Signed-off-by: SpectralHiss <houssem.elfekih@jetstack.io>
This commit is contained in:
SpectralHiss 2024-01-03 13:59:06 +00:00
parent d07dd3de5f
commit d186b61414
1 changed files with 44 additions and 42 deletions
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86
pkg/util/pki/asn1_util.go
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@ -116,48 +116,6 @@ func MarshalUniversalValue(uv UniversalValue) ([]byte, error) {
return bytes, nil
}
func isIA5String(s string) error {
for _, r := range s {
// Per RFC5280 "IA5String is limited to the set of ASCII characters"
if r > unicode.MaxASCII {
return fmt.Errorf("x509: %q cannot be encoded as an IA5String", s)
}
}
return nil
}
// isPrintable reports whether the given b is in the ASN.1 PrintableString set.
// '*' and '&' are also allowed, reflecting existing practice.
func isPrintable(s string) bool {
for _, b := range s {
if 'a' <= b && b <= 'z' ||
'A' <= b && b <= 'Z' ||
'0' <= b && b <= '9' ||
'\'' <= b && b <= ')' ||
'+' <= b && b <= '/' ||
b == ' ' ||
b == ':' ||
b == '=' ||
b == '?' ||
// This is technically not allowed in a PrintableString.
// However, x509 certificates with wildcard strings don't
// always use the correct string type so we permit it.
b == '*' ||
// This is not technically allowed either. However, not
// only is it relatively common, but there are also a
// handful of CA certificates that contain it. At least
// one of which will not expire until 2027.
b == '&' {
continue
}
return false
}
return true
}
func UnmarshalUniversalValue(rawValue asn1.RawValue) (UniversalValue, error) {
var uv UniversalValue
@ -189,3 +147,47 @@ func UnmarshalUniversalValue(rawValue asn1.RawValue) (UniversalValue, error) {
return uv, nil
}
// Copied from: https://github.com/golang/go/blob/c95fe91d0715dc0a8d55ac80a80f383c3635548b/src/crypto/x509/x509.go#L1093
func isIA5String(s string) error {
for _, r := range s {
// Per RFC5280 "IA5String is limited to the set of ASCII characters"
if r > unicode.MaxASCII {
return fmt.Errorf("x509: %q cannot be encoded as an IA5String", s)
}
}
return nil
}
// isPrintable reports whether the given b is in the ASN.1 PrintableString set.
// '*' and '&' are also allowed, reflecting existing practice.
// Copied from: https://github.com/golang/go/blob/c95fe91d0715dc0a8d55ac80a80f383c3635548b/src/crypto/x509/parser.go#L34
func isPrintable(s string) bool {
for _, b := range s {
if 'a' <= b && b <= 'z' ||
'A' <= b && b <= 'Z' ||
'0' <= b && b <= '9' ||
'\'' <= b && b <= ')' ||
'+' <= b && b <= '/' ||
b == ' ' ||
b == ':' ||
b == '=' ||
b == '?' ||
// This is technically not allowed in a PrintableString.
// However, x509 certificates with wildcard strings don't
// always use the correct string type so we permit it.
b == '*' ||
// This is not technically allowed either. However, not
// only is it relatively common, but there are also a
// handful of CA certificates that contain it. At least
// one of which will not expire until 2027.
b == '&' {
continue
}
return false
}
return true
}