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// MinIO Cloud Storage, (C) 2015, 2016, 2017, 2018 MinIO, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package crypto
import (
"fmt"
)
// Error is the generic type for any error happening during decrypting
// an object. It indicates that the object itself or its metadata was
// modified accidentally or maliciously.
type Error struct {
err error
}
// Errorf - formats according to a format specifier and returns
// the string as a value that satisfies error of type crypto.Error
func Errorf(format string, a ...interface{}) error {
return Error{err: fmt.Errorf(format, a...)}
}
// Unwrap the internal error.
func (e Error) Unwrap() error { return e.err }
// Error 'error' compatible method.
func (e Error) Error() string {
if e.err == nil {
return "crypto: cause <nil>"
}
return e.err.Error()
}
var (
// ErrInvalidEncryptionMethod indicates that the specified SSE encryption method
// is not supported.
ErrInvalidEncryptionMethod = Errorf("The encryption method is not supported")
// ErrInvalidCustomerAlgorithm indicates that the specified SSE-C algorithm
// is not supported.
ErrInvalidCustomerAlgorithm = Errorf("The SSE-C algorithm is not supported")
// ErrMissingCustomerKey indicates that the HTTP headers contains no SSE-C client key.
ErrMissingCustomerKey = Errorf("The SSE-C request is missing the customer key")
// ErrMissingCustomerKeyMD5 indicates that the HTTP headers contains no SSE-C client key
// MD5 checksum.
ErrMissingCustomerKeyMD5 = Errorf("The SSE-C request is missing the customer key MD5")
// ErrInvalidCustomerKey indicates that the SSE-C client key is not valid - e.g. not a
// base64-encoded string or not 256 bits long.
ErrInvalidCustomerKey = Errorf("The SSE-C client key is invalid")
// ErrSecretKeyMismatch indicates that the provided secret key (SSE-C client key / SSE-S3 KMS key)
// does not match the secret key used during encrypting the object.
ErrSecretKeyMismatch = Errorf("The secret key does not match the secret key used during upload")
// ErrCustomerKeyMD5Mismatch indicates that the SSE-C key MD5 does not match the
// computed MD5 sum. This means that the client provided either the wrong key for
// a certain MD5 checksum or the wrong MD5 for a certain key.
ErrCustomerKeyMD5Mismatch = Errorf("The provided SSE-C key MD5 does not match the computed MD5 of the SSE-C key")
// ErrIncompatibleEncryptionMethod indicates that both SSE-C headers and SSE-S3 headers were specified, and are incompatible
// The client needs to remove the SSE-S3 header or the SSE-C headers
ErrIncompatibleEncryptionMethod = Errorf("Server side encryption specified with both SSE-C and SSE-S3 headers")
)
var (
errMissingInternalIV = Errorf("The object metadata is missing the internal encryption IV")
errMissingInternalSealAlgorithm = Errorf("The object metadata is missing the internal seal algorithm")
errInvalidInternalIV = Errorf("The internal encryption IV is malformed")
errInvalidInternalSealAlgorithm = Errorf("The internal seal algorithm is invalid and not supported")
errMissingUpdatedKey = Errorf("The key update returned no error but also no sealed key")
)
var (
// errOutOfEntropy indicates that the a source of randomness (PRNG) wasn't able
// to produce enough random data. This is fatal error and should cause a panic.
errOutOfEntropy = Errorf("Unable to read enough randomness from the system")
)