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81 lines
2.4 KiB
Go
81 lines
2.4 KiB
Go
package server
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import (
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"crypto/sha256"
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b64 "encoding/base64"
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"fmt"
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"hash/crc32"
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"time"
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"codeberg.org/ac/base62"
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b "github.com/hashicorp/go-secure-stdlib/base62"
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"github.com/rs/xid"
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)
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const (
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// PATPrefix is the globally used, 4 char prefix for personal access tokens
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PATPrefix = "nbp_"
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// PATSecretLength number of characters used for the secret inside the token
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PATSecretLength = 30
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// PATChecksumLength number of characters used for the encoded checksum of the secret inside the token
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PATChecksumLength = 6
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// PATLength total number of characters used for the token
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PATLength = 40
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)
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// PersonalAccessToken holds all information about a PAT including a hashed version of it for verification
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type PersonalAccessToken struct {
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ID string
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Name string
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HashedToken string
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ExpirationDate time.Time
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// scope could be added in future
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CreatedBy string
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CreatedAt time.Time
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LastUsed time.Time
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}
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// PersonalAccessTokenGenerated holds the new PersonalAccessToken and the plain text version of it
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type PersonalAccessTokenGenerated struct {
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PlainToken string
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PersonalAccessToken
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}
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// CreateNewPAT will generate a new PersonalAccessToken that can be assigned to a User.
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// Additionally, it will return the token in plain text once, to give to the user and only save a hashed version
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func CreateNewPAT(name string, expirationInDays int, createdBy string) (*PersonalAccessTokenGenerated, error) {
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hashedToken, plainToken, err := generateNewToken()
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if err != nil {
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return nil, err
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}
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currentTime := time.Now()
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return &PersonalAccessTokenGenerated{
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PersonalAccessToken: PersonalAccessToken{
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ID: xid.New().String(),
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Name: name,
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HashedToken: hashedToken,
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ExpirationDate: currentTime.AddDate(0, 0, expirationInDays),
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CreatedBy: createdBy,
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CreatedAt: currentTime,
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LastUsed: time.Time{},
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},
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PlainToken: plainToken,
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}, nil
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}
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func generateNewToken() (string, string, error) {
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secret, err := b.Random(PATSecretLength)
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if err != nil {
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return "", "", err
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}
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checksum := crc32.ChecksumIEEE([]byte(secret))
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encodedChecksum := base62.Encode(checksum)
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paddedChecksum := fmt.Sprintf("%06s", encodedChecksum)
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plainToken := PATPrefix + secret + paddedChecksum
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hashedToken := sha256.Sum256([]byte(plainToken))
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encodedHashedToken := b64.StdEncoding.EncodeToString(hashedToken[:])
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return encodedHashedToken, plainToken, nil
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}
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