crypto: improve errors

ErrKeyLock:
	Rename to ErrMlockUlimit for clarity.

ErrGetrandomFail:
ErrKeyAlloc:
ErrKeyFree:
ErrNegativeLength:
	Replace these with one-off unnamed errors because these were all
	returned in only one place and were never checked for.  Also
	these were all either wrapped backwards or discarded an
	underlying error, so fix that too.

1 files changed, 3 insertions, 7 deletions

diff --git a/crypto/crypto.go b/crypto/crypto.go
index 9a138d0..1f64b38 100644
--- a/crypto/crypto.go
+++ b/crypto/crypto.go
@@ -50,13 +50,9 @@ import (
 
 // Crypto error values
 var (
-	ErrBadAuth        = errors.New("key authentication check failed")
-	ErrNegativeLength = errors.New("keys cannot have negative lengths")
-	ErrRecoveryCode   = errors.New("invalid recovery code")
-	ErrGetrandomFail  = util.SystemError("getrandom() failed")
-	ErrKeyAlloc       = util.SystemError("could not allocate memory for key")
-	ErrKeyFree        = util.SystemError("could not free memory of key")
-	ErrKeyLock        = errors.New("could not lock key in memory")
+	ErrBadAuth      = errors.New("key authentication check failed")
+	ErrRecoveryCode = errors.New("invalid recovery code")
+	ErrMlockUlimit  = errors.New("could not lock key in memory")
 )
 
 // panicInputLength panics if "name" has invalid length (expected != actual)