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minio/cmd/access-key.go

92 lines
2.6 KiB

/*
* Minio Cloud Storage, (C) 2015, 2016 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 cmd
import (
"crypto/rand"
"encoding/base64"
)
// credential container for access and secret keys.
type credential struct {
AccessKeyID string `json:"accessKey"`
SecretAccessKey string `json:"secretKey"`
}
const (
accessKeyMinLen = 5
accessKeyMaxLen = 20
secretKeyMinLen = 8
secretKeyMaxLen = 40
)
// isValidAccessKey - validate access key for right length.
func isValidAccessKey(accessKey string) bool {
return len(accessKey) >= accessKeyMinLen && len(accessKey) <= accessKeyMaxLen
}
// isValidSecretKey - validate secret key for right length.
func isValidSecretKey(secretKey string) bool {
return len(secretKey) >= secretKeyMinLen && len(secretKey) <= secretKeyMaxLen
}
// mustGenAccessKeys - must generate access credentials.
func mustGenAccessKeys() (creds credential) {
creds, err := genAccessKeys()
fatalIf(err, "Unable to generate access keys.")
return creds
}
// genAccessKeys - generate access credentials.
func genAccessKeys() (credential, error) {
accessKeyID, err := genAccessKeyID()
if err != nil {
return credential{}, err
}
secretAccessKey, err := genSecretAccessKey()
if err != nil {
return credential{}, err
}
creds := credential{
AccessKeyID: string(accessKeyID),
SecretAccessKey: string(secretAccessKey),
}
return creds, nil
}
// genAccessKeyID - generate random alpha numeric value using only uppercase characters
// takes input as size in integer
func genAccessKeyID() ([]byte, error) {
alpha := make([]byte, accessKeyMaxLen)
if _, err := rand.Read(alpha); err != nil {
return nil, err
}
for i := 0; i < accessKeyMaxLen; i++ {
alpha[i] = alphaNumericTable[alpha[i]%byte(len(alphaNumericTable))]
}
return alpha, nil
}
// genSecretAccessKey - generate random base64 numeric value from a random seed.
func genSecretAccessKey() ([]byte, error) {
rb := make([]byte, secretKeyMaxLen)
if _, err := rand.Read(rb); err != nil {
return nil, err
}
return []byte(base64.StdEncoding.EncodeToString(rb))[:secretKeyMaxLen], nil
}