VOL-1967 move api-server to separate repository
Change-Id: I21b85be74205805be15f8a85e53a903d16785671
diff --git a/vendor/gopkg.in/jcmturner/gokrb5.v7/asn1tools/tools.go b/vendor/gopkg.in/jcmturner/gokrb5.v7/asn1tools/tools.go
new file mode 100644
index 0000000..f27740b
--- /dev/null
+++ b/vendor/gopkg.in/jcmturner/gokrb5.v7/asn1tools/tools.go
@@ -0,0 +1,86 @@
+// Package asn1tools provides tools for managing ASN1 marshaled data.
+package asn1tools
+
+import (
+ "github.com/jcmturner/gofork/encoding/asn1"
+)
+
+// MarshalLengthBytes returns the ASN1 encoded bytes for the length 'l'
+//
+// There are two forms: short (for lengths between 0 and 127), and long definite (for lengths between 0 and 2^1008 -1).
+//
+// Short form: One octet. Bit 8 has value "0" and bits 7-1 give the length.
+//
+// Long form: Two to 127 octets. Bit 8 of first octet has value "1" and bits 7-1 give the number of additional length octets. Second and following octets give the length, base 256, most significant digit first.
+func MarshalLengthBytes(l int) []byte {
+ if l <= 127 {
+ return []byte{byte(l)}
+ }
+ var b []byte
+ p := 1
+ for i := 1; i < 127; {
+ b = append([]byte{byte((l % (p * 256)) / p)}, b...)
+ p = p * 256
+ l = l - l%p
+ if l <= 0 {
+ break
+ }
+ }
+ return append([]byte{byte(128 + len(b))}, b...)
+}
+
+// GetLengthFromASN returns the length of a slice of ASN1 encoded bytes from the ASN1 length header it contains.
+func GetLengthFromASN(b []byte) int {
+ if int(b[1]) <= 127 {
+ return int(b[1])
+ }
+ // The bytes that indicate the length
+ lb := b[2 : 2+int(b[1])-128]
+ base := 1
+ l := 0
+ for i := len(lb) - 1; i >= 0; i-- {
+ l += int(lb[i]) * base
+ base = base * 256
+ }
+ return l
+}
+
+// GetNumberBytesInLengthHeader returns the number of bytes in the ASn1 header that indicate the length.
+func GetNumberBytesInLengthHeader(b []byte) int {
+ if int(b[1]) <= 127 {
+ return 1
+ }
+ // The bytes that indicate the length
+ return 1 + int(b[1]) - 128
+}
+
+// AddASNAppTag adds an ASN1 encoding application tag value to the raw bytes provided.
+func AddASNAppTag(b []byte, tag int) []byte {
+ r := asn1.RawValue{
+ Class: asn1.ClassApplication,
+ IsCompound: true,
+ Tag: tag,
+ Bytes: b,
+ }
+ ab, _ := asn1.Marshal(r)
+ return ab
+}
+
+/*
+// The Marshal method of golang's asn1 package does not enable you to define wrapping the output in an application tag.
+// This method adds that wrapping tag.
+func AddASNAppTag(b []byte, tag int) []byte {
+ // The ASN1 wrapping consists of 2 bytes:
+ // 1st byte -> Identifier Octet - Application Tag
+ // 2nd byte -> The length (this will be the size indicated in the input bytes + 2 for the additional bytes we add here.
+ // Application Tag:
+ //| Bit: | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
+ //| Value: | 0 | 1 | 1 | From the RFC spec 4120 |
+ //| Explanation | Defined by the ASN1 encoding rules for an application tag | A value of 1 indicates a constructed type | The ASN Application tag value |
+ // Therefore the value of the byte is an integer = ( Application tag value + 96 )
+ //b = append(MarshalLengthBytes(int(b[1])+2), b...)
+ b = append(MarshalLengthBytes(len(b)), b...)
+ b = append([]byte{byte(96 + tag)}, b...)
+ return b
+}
+*/