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optimize padding reading

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This commit is contained in:
Darien Raymond 2018-07-30 20:08:50 +02:00
parent f37e2ace9c
commit d615adab36
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GPG Key ID: 7251FFA14BB18169
1 changed files with 2 additions and 8 deletions
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10
common/crypto/auth.go
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@ -210,7 +210,7 @@ func NewAuthenticationWriter(auth Authenticator, sizeParser ChunkSizeEncoder, wr
func (w *AuthenticationWriter) seal(b *buf.Buffer) (*buf.Buffer, error) {
encryptedSize := int(b.Len()) + w.auth.Overhead()
paddingSize := 0
var paddingSize int
if w.padding != nil {
paddingSize = int(w.padding.NextPaddingLen())
}
@ -228,13 +228,7 @@ func (w *AuthenticationWriter) seal(b *buf.Buffer) (*buf.Buffer, error) {
return nil, err
}
if paddingSize > 0 {
if err := eb.AppendSupplier(func(bb []byte) (int, error) {
common.Must2(rand.Read(bb[:paddingSize]))
return paddingSize, nil
}); err != nil {
eb.Release()
return nil, err
}
common.Must(eb.AppendSupplier(buf.ReadFullFrom(rand.Reader, int32(paddingSize))))
}
return eb, nil