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Abort handshake if establishing DH shared secret fails

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Fixes #27
This commit is contained in:
Mike Gelfand 2016-09-18 13:58:15 +03:00
parent 67ef7b888c
commit 7cc4cfbe7b
1 changed files with 5 additions and 2 deletions
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7
libtransmission/handshake.c
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@ -426,7 +426,8 @@ readYb (tr_handshake * handshake, struct evbuffer * inbuf)
/* compute the secret */ /* compute the secret */
evbuffer_remove (inbuf, yb, KEY_LEN); evbuffer_remove (inbuf, yb, KEY_LEN);
tr_cryptoComputeSecret (handshake->crypto, yb); if (!tr_cryptoComputeSecret (handshake->crypto, yb))
return tr_handshakeDone (handshake, false);
/* now send these: HASH ('req1', S), HASH ('req2', SKEY) xor HASH ('req3', S), /* now send these: HASH ('req1', S), HASH ('req2', SKEY) xor HASH ('req3', S),
* ENCRYPT (VC, crypto_provide, len (PadC), PadC, len (IA)), ENCRYPT (IA) */ * ENCRYPT (VC, crypto_provide, len (PadC), PadC, len (IA)), ENCRYPT (IA) */
@ -742,7 +743,9 @@ readYa (tr_handshake * handshake,
/* read the incoming peer's public key */ /* read the incoming peer's public key */
evbuffer_remove (inbuf, ya, KEY_LEN); evbuffer_remove (inbuf, ya, KEY_LEN);
tr_cryptoComputeSecret (handshake->crypto, ya); if (!tr_cryptoComputeSecret (handshake->crypto, ya))
return tr_handshakeDone (handshake, false);
computeRequestHash (handshake, "req1", handshake->myReq1); computeRequestHash (handshake, "req1", handshake->myReq1);
/* send our public key to the peer */ /* send our public key to the peer */