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91 lines
2.6 KiB
91 lines
2.6 KiB
/*
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* Minio Cloud Storage, (C) 2015, 2016 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"crypto/rand"
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"encoding/base64"
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)
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// credential container for access and secret keys.
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type credential struct {
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AccessKeyID string `json:"accessKey"`
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SecretAccessKey string `json:"secretKey"`
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}
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const (
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accessKeyMinLen = 5
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accessKeyMaxLen = 20
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secretKeyMinLen = 8
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secretKeyMaxLen = 40
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)
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// isValidAccessKey - validate access key for right length.
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func isValidAccessKey(accessKey string) bool {
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return len(accessKey) >= accessKeyMinLen && len(accessKey) <= accessKeyMaxLen
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}
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// isValidSecretKey - validate secret key for right length.
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func isValidSecretKey(secretKey string) bool {
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return len(secretKey) >= secretKeyMinLen && len(secretKey) <= secretKeyMaxLen
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}
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// mustGenAccessKeys - must generate access credentials.
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func mustGenAccessKeys() (creds credential) {
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creds, err := genAccessKeys()
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fatalIf(err, "Unable to generate access keys.")
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return creds
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}
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// genAccessKeys - generate access credentials.
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func genAccessKeys() (credential, error) {
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accessKeyID, err := genAccessKeyID()
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if err != nil {
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return credential{}, err
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}
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secretAccessKey, err := genSecretAccessKey()
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if err != nil {
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return credential{}, err
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}
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creds := credential{
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AccessKeyID: string(accessKeyID),
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SecretAccessKey: string(secretAccessKey),
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}
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return creds, nil
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}
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// genAccessKeyID - generate random alpha numeric value using only uppercase characters
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// takes input as size in integer
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func genAccessKeyID() ([]byte, error) {
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alpha := make([]byte, accessKeyMaxLen)
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if _, err := rand.Read(alpha); err != nil {
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return nil, err
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}
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for i := 0; i < accessKeyMaxLen; i++ {
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alpha[i] = alphaNumericTable[alpha[i]%byte(len(alphaNumericTable))]
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}
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return alpha, nil
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}
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// genSecretAccessKey - generate random base64 numeric value from a random seed.
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func genSecretAccessKey() ([]byte, error) {
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rb := make([]byte, secretKeyMaxLen)
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if _, err := rand.Read(rb); err != nil {
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return nil, err
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}
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return []byte(base64.StdEncoding.EncodeToString(rb))[:secretKeyMaxLen], nil
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}
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