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Backport fix for CVE-2021-34558 (#80)

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See: https://groups.google.com/g/golang-dev/c/5LJ2V7rd-Ag/m/YGLHVBZ6AAAJ
This commit is contained in:
Rod Hynes 2021-07-13 12:56:36 -04:00 • committed by GitHub
parent 2179f28668
commit 0b2885c8c0
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1 changed files with 5 additions and 1 deletions
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6
key_agreement.go
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@ -69,7 +69,11 @@ func (ka rsaKeyAgreement) generateClientKeyExchange(config *Config, clientHello
return nil, nil, err
}
encrypted, err := rsa.EncryptPKCS1v15(config.rand(), cert.PublicKey.(*rsa.PublicKey), preMasterSecret)
rsaKey, ok := cert.PublicKey.(*rsa.PublicKey)
if !ok {
return nil, nil, errors.New("tls: server certificate contains incorrect key type for selected ciphersuite")
}
encrypted, err := rsa.EncryptPKCS1v15(config.rand(), rsaKey, preMasterSecret)
if err != nil {
return nil, nil, err
}