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-rw-r--r--vendor/golang.org/x/crypto/blowfish/cipher.go8
1 files changed, 8 insertions, 0 deletions
diff --git a/vendor/golang.org/x/crypto/blowfish/cipher.go b/vendor/golang.org/x/crypto/blowfish/cipher.go
index 2641dadd..213bf204 100644
--- a/vendor/golang.org/x/crypto/blowfish/cipher.go
+++ b/vendor/golang.org/x/crypto/blowfish/cipher.go
@@ -3,6 +3,14 @@
// license that can be found in the LICENSE file.
// Package blowfish implements Bruce Schneier's Blowfish encryption algorithm.
+//
+// Blowfish is a legacy cipher and its short block size makes it vulnerable to
+// birthday bound attacks (see https://sweet32.info). It should only be used
+// where compatibility with legacy systems, not security, is the goal.
+//
+// Deprecated: any new system should use AES (from crypto/aes, if necessary in
+// an AEAD mode like crypto/cipher.NewGCM) or XChaCha20-Poly1305 (from
+// golang.org/x/crypto/chacha20poly1305).
package blowfish // import "golang.org/x/crypto/blowfish"
// The code is a port of Bruce Schneier's C implementation.