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Handle base64 decoding correctly to avoid panic (#26483)

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Fix the panic if the "base64 secret" is too long.
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wxiaoguang 2023-08-14 18:30:16 +08:00 • committed by GitHub
parent cafce3b4b5
commit ed1be4ca68
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8 changed files with 43 additions and 30 deletions
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13
modules/setting/oauth2.go
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@ -10,6 +10,7 @@ import (
"code.gitea.io/gitea/modules/generate"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/util"
)
// OAuth2UsernameType is enum describing the way gitea 'name' should be generated from oauth2 data
@ -129,21 +130,19 @@ func loadOAuth2From(rootCfg ConfigProvider) {
}
if InstallLock {
key := make([]byte, 32)
n, err := base64.RawURLEncoding.Decode(key, []byte(OAuth2.JWTSecretBase64))
if err != nil || n != 32 {
key, err = generate.NewJwtSecret()
if _, err := util.Base64FixedDecode(base64.RawURLEncoding, []byte(OAuth2.JWTSecretBase64), 32); err != nil {
key, err := generate.NewJwtSecret()
if err != nil {
log.Fatal("error generating JWT secret: %v", err)
}
secretBase64 := base64.RawURLEncoding.EncodeToString(key)
OAuth2.JWTSecretBase64 = base64.RawURLEncoding.EncodeToString(key)
saveCfg, err := rootCfg.PrepareSaving()
if err != nil {
log.Fatal("save oauth2.JWT_SECRET failed: %v", err)
}
rootCfg.Section("oauth2").Key("JWT_SECRET").SetValue(secretBase64)
saveCfg.Section("oauth2").Key("JWT_SECRET").SetValue(secretBase64)
rootCfg.Section("oauth2").Key("JWT_SECRET").SetValue(OAuth2.JWTSecretBase64)
saveCfg.Section("oauth2").Key("JWT_SECRET").SetValue(OAuth2.JWTSecretBase64)
if err := saveCfg.Save(); err != nil {
log.Fatal("save oauth2.JWT_SECRET failed: %v", err)
}