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dtls13: support Authentication and Integrity-Only Cipher Suites

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See RFC 9150. To enable the feature use HAVE_NULL_CIPHER compilation flag.
This commit is contained in:
Marco Oliverio
2023-04-12 12:14:51 +00:00
parent 5f1ce09dce
commit 31ed2a2bbb
1 changed files with 15 additions and 0 deletions
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15
src/dtls13.c
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@@ -301,6 +301,12 @@ static int Dtls13EncryptDecryptRecordNumber(WOLFSSL* ssl, byte* seq,
byte mask[DTLS13_RN_MASK_SIZE];
int ret;
#ifdef HAVE_NULL_CIPHER
/* Do not encrypt record numbers with null cipher. See RFC 9150 Sec 9 */
if (ssl->specs.bulk_cipher_algorithm == wolfssl_cipher_null)
return 0;
#endif /*HAVE_NULL_CIPHER */
ret = Dtls13GetRnMask(ssl, ciphertext, mask, dir);
if (ret != 0)
return ret;
@@ -2266,6 +2272,15 @@ int Dtls13SetRecordNumberKeys(WOLFSSL* ssl, enum encrypt_side side)
}
#endif /* HAVE_CHACHA */
#ifdef HAVE_NULL_CIPHER
if (ssl->specs.bulk_cipher_algorithm == wolfssl_cipher_null) {
#ifdef WOLFSSL_DEBUG_TLS
WOLFSSL_MSG("Skipping Record Number key provisioning with null cipher");
#endif /* WOLFSSL_DEBUG_TLS */
return 0;
}
#endif /* HAVE_NULL_CIPHER */
return NOT_COMPILED_IN;
}