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package s3crypto
import (
"crypto/rand"
"github.com/aws/aws-sdk-go/aws"
)
// CipherDataGenerator handles generating proper key and IVs of proper size for the
// content cipher. CipherDataGenerator will also encrypt the key and store it in
// the CipherData.
type CipherDataGenerator interface {
GenerateCipherData(int, int) (CipherData, error)
}
// CipherDataGeneratorWithContext handles generating proper key and IVs of
// proper size for the content cipher. CipherDataGenerator will also encrypt
// the key and store it in the CipherData.
type CipherDataGeneratorWithContext interface {
GenerateCipherDataWithContext(aws.Context, int, int) (CipherData, error)
}
// CipherDataGeneratorWithCEKAlg handles generating proper key and IVs of proper size for the
// content cipher. CipherDataGenerator will also encrypt the key and store it in
// the CipherData.
type CipherDataGeneratorWithCEKAlg interface {
GenerateCipherDataWithCEKAlg(ctx aws.Context, keySize, ivSize int, cekAlgorithm string) (CipherData, error)
}
// CipherDataDecrypter is a handler to decrypt keys from the envelope.
type CipherDataDecrypter interface {
DecryptKey([]byte) ([]byte, error)
}
// CipherDataDecrypterWithContext is a handler to decrypt keys from the envelope with request context.
type CipherDataDecrypterWithContext interface {
DecryptKeyWithContext(aws.Context, []byte) ([]byte, error)
}
func generateBytes(n int) ([]byte, error) {
b := make([]byte, n)
_, err := rand.Read(b)
if err != nil {
return nil, err
}
return b, nil
}
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