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50 lines
1.3 KiB
Go
50 lines
1.3 KiB
Go
package credsutil
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import (
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"time"
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"fmt"
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uuid "github.com/hashicorp/go-uuid"
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"github.com/hashicorp/vault/builtin/logical/database/dbplugin"
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"github.com/hashicorp/vault/helper/keysutil"
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)
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// CredentialsProducer can be used as an embeded interface in the Database
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// definition. It implements the methods for generating user information for a
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// particular database type and is used in all the builtin database types.
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type CredentialsProducer interface {
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GenerateUsername(usernameConfig dbplugin.UsernameConfig) (string, error)
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GeneratePassword() (string, error)
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GenerateExpiration(ttl time.Time) (string, error)
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}
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const (
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reqStr = `A1a-`
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minStrLen = 10
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)
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// RandomAlphaNumeric returns a random string of characters [A-Za-z0-9-]
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// of the provided length. The string generated takes up to 4 characters
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// of space that are predefined and prepended to ensure password
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// character requirements. It also requires a min length of 10 characters.
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func RandomAlphaNumeric(length int, prependA1a bool) (string, error) {
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if length < minStrLen {
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return "", fmt.Errorf("minimum length of %d is required", minStrLen)
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}
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var prefix string
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if prependA1a {
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prefix = reqStr
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}
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buf, err := uuid.GenerateRandomBytes(length - len(prefix))
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if err != nil {
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return "", err
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}
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output := (prefix + keysutil.Base62Encode(buf))[:length]
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return output, nil
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}
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