36 lines
725 B
Go
36 lines
725 B
Go
package contentenc
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import "github.com/rfjakob/gocryptfs/internal/cryptocore"
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const (
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// Default plaintext block size
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DefaultBS = 4096
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)
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type ContentEnc struct {
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// Cryptographic primitives
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cryptoCore *cryptocore.CryptoCore
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// Plaintext block size
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plainBS uint64
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// Ciphertext block size
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cipherBS uint64
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// All-zero block of size cipherBS, for fast compares
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allZeroBlock []byte
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}
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func New(cc *cryptocore.CryptoCore, plainBS uint64) *ContentEnc {
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cipherBS := plainBS + uint64(cc.IVLen) + cryptocore.AuthTagLen
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return &ContentEnc{
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cryptoCore: cc,
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plainBS: plainBS,
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cipherBS: cipherBS,
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allZeroBlock: make([]byte, cipherBS),
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}
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}
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func (be *ContentEnc) PlainBS() uint64 {
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return be.plainBS
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}
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