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util.go
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util.go
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package utils
import (
"bytes"
"crypto/rand"
"encoding/gob"
"fmt"
"hash/adler32"
"hash/fnv"
"io"
"github.com/mitchellh/hashstructure/v2"
corev1 "k8s.io/api/core/v1"
hashutil "k8s.io/kubernetes/pkg/util/hash"
)
// SimpleHash returns a hash string of the given object.
func SimpleHash(obj interface{}) string {
hash, err := hashstructure.Hash(obj, hashstructure.FormatV2, nil)
if err != nil {
log.Error().Msgf("Not able convert Data to hash, error: %s", err.Error())
return ""
}
return fmt.Sprintf("%x", hash)
}
//func Hash(data []byte) string {
// return fmt.Sprintf("%x", sha256.Sum256(data))
//}
// GetBytes returns the bytes of the given object.
func GetBytes(key interface{}) ([]byte, error) {
var buf bytes.Buffer
enc := gob.NewEncoder(&buf)
err := enc.Encode(key)
if err != nil {
return nil, err
}
return buf.Bytes(), nil
}
// HashFNV returns a hash string of the given string.
func HashFNV(s string) string {
hasher := fnv.New32a()
// Hash.Write never returns an error
_, _ = hasher.Write([]byte(s))
return fmt.Sprintf("%x", hasher.Sum(nil))
}
// GenerateRandom generates random string.
func GenerateRandom(n int) string {
b := make([]byte, 8)
_, _ = io.ReadFull(rand.Reader, b)
return fmt.Sprintf("%x", b)[:n]
}
// GetSecretDataHash returns a hash of the given secret data.
func GetSecretDataHash(secret *corev1.Secret) uint32 {
secretDataHasher := adler32.New()
hashutil.DeepHashObject(secretDataHasher, secret.Data)
return secretDataHasher.Sum32()
}