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tls: fix is.gd again, fix AES-CBC using decrypt key instead of encrypt

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2018-11-24 21:26:20 +01:00
parent 03569bc50f
commit d2923b3d23
1 changed files with 7 additions and 5 deletions
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12
networking/tls.c
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@ -58,11 +58,13 @@
// Works with "wget https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.9.5.tar.xz"
#define CIPHER_ID2 TLS_RSA_WITH_AES_128_CBC_SHA
// bug #11456: host is.gd accepts only ECDHE-ECDSA-foo (the simplest which works: ECDHE-ECDSA-AES128-SHA 0xC009)
#define CIPHER_ID3 TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
// bug #11456:
// ftp.openbsd.org only supports ECDHE-RSA-AESnnn-GCM-SHAnnn or ECDHE-RSA-CHACHA20-POLY1305
#define CIPHER_ID4 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
#define CIPHER_ID3 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
// host is.gd accepts only ECDHE-ECDSA-foo (the simplest which works: ECDHE-ECDSA-AES128-SHA 0xC009),
// and immediately throws alert 40 "handshake failure" in response to our hello record
// if ECDHE-ECDSA-AES-CBC-SHA is *before* ECDHE-RSA-AES-GCM cipher in the list! Server bug?
#define CIPHER_ID4 TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
#define NUM_CIPHERS 4
@ -785,7 +787,7 @@ static void xwrite_encrypted_and_hmac_signed(tls_state_t *tls, unsigned size, un
/* Encrypt content+MAC+padding in place */
aes_cbc_encrypt(
&tls->aes_decrypt, /* selects 128/256 */
&tls->aes_encrypt, /* selects 128/256 */
buf - AES_BLOCK_SIZE, /* IV */
buf, size, /* plaintext */
buf /* ciphertext */