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minio/pkg/server/api/auth/keys/keys.go

51 lines
1.5 KiB

/*
* Minimalist Object Storage, (C) 2015 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 keys
import (
"crypto/rand"
"encoding/base64"
)
// Static alphaNumeric table used for generating unique keys
var alphaNumericTable = []byte("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ")
// GenerateRandomAlphaNumeric - generate random alpha numeric value using only uppercase characters
// takes input as size in integer
func GenerateRandomAlphaNumeric(size int) ([]byte, error) {
alpha := make([]byte, size)
_, err := rand.Read(alpha)
if err != nil {
return nil, err
}
for i := 0; i < size; i++ {
alpha[i] = alphaNumericTable[alpha[i]%byte(len(alphaNumericTable))]
}
return alpha, nil
}
// GenerateRandomBase64 - generate random base64 numeric value from a random seed.
func GenerateRandomBase64(size int) ([]byte, error) {
rb := make([]byte, size)
_, err := rand.Read(rb)
if err != nil {
return nil, err
}
dest := base64.StdEncoding.EncodeToString(rb)
return []byte(dest), nil
}