74 lines
1.9 KiB
Go
74 lines
1.9 KiB
Go
package util
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import (
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"crypto/md5"
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"encoding/hex"
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"math/rand"
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"strings"
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"time"
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"github.com/motomux/pretty"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"github.com/zalando-incubator/postgres-operator/pkg/spec"
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)
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const (
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md5prefix = "md5"
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)
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var passwordChars = []byte("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
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func init() {
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rand.Seed(int64(time.Now().Unix()))
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}
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// RandomPassword generates random alphanumeric password of a given length.
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func RandomPassword(n int) string {
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b := make([]byte, n)
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for i := range b {
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b[i] = passwordChars[rand.Intn(len(passwordChars))]
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}
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return string(b)
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}
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// NameFromMeta converts a metadata object to the NamespacedName name representation.
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func NameFromMeta(meta metav1.ObjectMeta) spec.NamespacedName {
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return spec.NamespacedName{
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Namespace: meta.Namespace,
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Name: meta.Name,
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}
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}
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// PGUserPassword is used to generate md5 password hash for a given user. It does nothing for already hashed passwords.
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func PGUserPassword(user spec.PgUser) string {
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if (len(user.Password) == md5.Size*2+len(md5prefix) && user.Password[:3] == md5prefix) || user.Password == "" {
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// Avoid processing already encrypted or empty passwords
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return user.Password
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}
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s := md5.Sum([]byte(user.Password + user.Name))
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return md5prefix + hex.EncodeToString(s[:])
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}
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// PrettyDiff shows the diff between 2 objects in an easy to understand format. It is mainly used for debugging output.
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func PrettyDiff(a, b interface{}) (result string) {
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diff := pretty.Diff(a, b)
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return strings.Join(diff, "\n")
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}
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// SubstractStringSlices finds elements in a that are not in b and return them as a result slice.
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func SubstractStringSlices(a []string, b []string) (result []string, equal bool) {
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// Slices are assumed to contain unique elements only
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OUTER:
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for _, vala := range a {
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for _, valb := range b {
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if vala == valb {
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continue OUTER
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}
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}
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result = append(result, vala)
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}
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return result, len(result) == 0
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}
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