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feat(account-management): use new algorithm for pidHMAC

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This commit is contained in:
Daniel López Guimaraes
2026-06-17 00:24:06 +01:00
parent c5221a5092
commit 53d6d251e9
3 changed files with 16 additions and 9 deletions
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1
README.md
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@@ -100,3 +100,4 @@ All configuration options are handled via environment variables
| `PN_FRIENDS_CONFIG_HEALTH_CHECK_PORT` | Port for the basic UDP health check server | No |
| `PN_FRIENDS_CONFIG_ENABLE_BELLA` | Enables a debug user named "Bella" which is always assigned as your friend | No |
| `PN_FRIENDS_CONFIG_MII_DECRYPT_KEY` | AES key used to decrypt 3DS Mii data (as a hex string) | Yes |
| `PN_FRIENDS_CONFIG_PID_HMAC_KEY` | AES key used for the `pidHMAC` field in accounts | Yes |

1
globals/config.go
View File

@@ -15,6 +15,7 @@ type config struct {
HealthCheckPort uint16 `envconf:"optional"`
EnableBella bool `envconf:"optional"`
MiiDecryptKey string
PIDHmacKey string
}
var Config *config = &config{}

23
nex/account-management/nintendo_create_account.go
View File

@@ -3,8 +3,7 @@ package nex_account_management
import (
"crypto/hmac"
"crypto/md5"
"encoding/binary"
"encoding/hex"
"strconv"
"github.com/PretendoNetwork/friends/globals"
"github.com/PretendoNetwork/friends/utility"
@@ -13,6 +12,8 @@ import (
account_management "github.com/PretendoNetwork/nex-protocols-go/v2/account-management"
)
const PIDHmacCharset = "!\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[]^_`abcdefghijklmnopqrstuvwxyz{|}"
func NintendoCreateAccount(err error, packet nex.PacketInterface, callID uint32, strPrincipalName types.String, strKey types.String, uiGroups types.UInt32, strEmail types.String, oAuthData types.DataHolder) (*nex.RMCMessage, *nex.Error) {
if err != nil {
globals.Logger.Error(err.Error())
@@ -26,23 +27,27 @@ func NintendoCreateAccount(err error, packet nex.PacketInterface, callID uint32,
}
pid := types.NewPID(uint64(decryptedToken.UserPID))
pidString := strconv.FormatUint(uint64(pid), 10)
pidByteArray := make([]byte, 4)
binary.LittleEndian.PutUint32(pidByteArray, uint32(pid))
mac := hmac.New(md5.New, []byte(strKey))
_, err = mac.Write(pidByteArray)
mac := hmac.New(md5.New, []byte(globals.Config.PIDHmacKey))
_, err = mac.Write([]byte(pidString))
if err != nil {
globals.Logger.Error(err.Error())
return nil, nex.NewError(nex.ResultCodes.Authentication.Unknown, err.Error())
}
pidHmac := types.NewString(hex.EncodeToString(mac.Sum(nil)))
macBytes := mac.Sum(nil)
macEncoded := make([]byte, 8)
for i := range 8 {
macEncoded[i] = PIDHmacCharset[int(macBytes[i]) % len(PIDHmacCharset)]
}
pidHMAC := types.NewString(string(macEncoded))
rmcResponseStream := nex.NewByteStreamOut(globals.SecureEndpoint.LibraryVersions(), globals.SecureEndpoint.ByteStreamSettings())
pid.WriteTo(rmcResponseStream)
pidHmac.WriteTo(rmcResponseStream)
pidHMAC.WriteTo(rmcResponseStream)
rmcResponseBody := rmcResponseStream.Bytes()