1 files changed, 38 insertions, 0 deletions
diff --git a/teleirc/matterbridge/vendor/github.com/go-asn1-ber/asn1-ber/header.go b/teleirc/matterbridge/vendor/github.com/go-asn1-ber/asn1-ber/header.go
new file mode 100644
index 0000000..7dfa6b9
--- /dev/null
+++ b/teleirc/matterbridge/vendor/github.com/go-asn1-ber/asn1-ber/header.go
@@ -0,0 +1,38 @@
+package ber
+
+import (
+	"errors"
+	"fmt"
+	"io"
+)
+
+func readHeader(reader io.Reader) (identifier Identifier, length int, read int, err error) {
+	var (
+		c, l int
+		i    Identifier
+	)
+
+	if i, c, err = readIdentifier(reader); err != nil {
+		return Identifier{}, 0, read, err
+	}
+	identifier = i
+	read += c
+
+	if l, c, err = readLength(reader); err != nil {
+		return Identifier{}, 0, read, err
+	}
+	length = l
+	read += c
+
+	// Validate length type with identifier (x.600, 8.1.3.2.a)
+	if length == LengthIndefinite && identifier.TagType == TypePrimitive {
+		return Identifier{}, 0, read, errors.New("indefinite length used with primitive type")
+	}
+
+	if length < LengthIndefinite {
+		err = fmt.Errorf("length cannot be less than %d", LengthIndefinite)
+		return
+	}
+
+	return identifier, length, read, nil
+}