1 files changed, 59 insertions, 0 deletions

diff --git a/vendor/golang.org/x/crypto/openpgp/canonical_text.go b/vendor/golang.org/x/crypto/openpgp/canonical_text.go
new file mode 100644
index 0000000..e601e38
--- /dev/null
+++ b/vendor/golang.org/x/crypto/openpgp/canonical_text.go
@@ -0,0 +1,59 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package openpgp
+
+import "hash"
+
+// NewCanonicalTextHash reformats text written to it into the canonical
+// form and then applies the hash h.  See RFC 4880, section 5.2.1.
+func NewCanonicalTextHash(h hash.Hash) hash.Hash {
+        return &canonicalTextHash{h, 0}
+}
+
+type canonicalTextHash struct {
+        h hash.Hash
+        s int
+}
+
+var newline = []byte{'\r', '\n'}
+
+func (cth *canonicalTextHash) Write(buf []byte) (int, error) {
+        start := 0
+
+        for i, c := range buf {
+                switch cth.s {
+                case 0:
+                        if c == '\r' {
+                                cth.s = 1
+                        } else if c == '\n' {
+                                cth.h.Write(buf[start:i])
+                                cth.h.Write(newline)
+                                start = i + 1
+                        }
+                case 1:
+                        cth.s = 0
+                }
+        }
+
+        cth.h.Write(buf[start:])
+        return len(buf), nil
+}
+
+func (cth *canonicalTextHash) Sum(in []byte) []byte {
+        return cth.h.Sum(in)
+}
+
+func (cth *canonicalTextHash) Reset() {
+        cth.h.Reset()
+        cth.s = 0
+}
+
+func (cth *canonicalTextHash) Size() int {
+        return cth.h.Size()
+}
+
+func (cth *canonicalTextHash) BlockSize() int {
+        return cth.h.BlockSize()
+}