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(EC)DH memory handling fixes.

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Submitted by: Adam Langley
This commit is contained in:
Bodo Möller 2011-09-05 10:25:31 +00:00
parent 837e1b6812
commit e7928282d0
4 changed files with 30 additions and 9 deletions
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8
CHANGES
View File

@ -418,6 +418,10 @@
Changes between 1.0.0d and 1.0.0e [xx XXX xxxx]
*) Fix SSL memory handling for (EC)DH ciphersuites, in particular
for multi-threaded use of ECDH.
[Adam Langley (Google)]
*) Fix x509_name_ex_d2i memory leak on bad inputs.
[Bodo Moeller]
@ -1315,6 +1319,10 @@
Changes between 0.9.8r and 0.9.8s [xx XXX xxxx]
*) Fix SSL memory handling for (EC)DH ciphersuites, in particular
for multi-threaded use of ECDH.
[Adam Langley (Google)]
*) Fix x509_name_ex_d2i memory leak on bad inputs.
[Bodo Moeller]

3
ssl/d1_srvr.c
View File

@ -1031,12 +1031,11 @@ int dtls1_send_server_key_exchange(SSL *s)
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
goto err;
}
if (!EC_KEY_up_ref(ecdhp))
if ((ecdh = EC_KEY_dup(ecdhp)) == NULL)
{
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
goto err;
}
ecdh = ecdhp;
s->s3->tmp.ecdh=ecdh;
if ((EC_KEY_get0_public_key(ecdh) == NULL) ||

6
ssl/s3_lib.c
View File

@ -3021,11 +3021,17 @@ void ssl3_clear(SSL *s)
}
#ifndef OPENSSL_NO_DH
if (s->s3->tmp.dh != NULL)
{
DH_free(s->s3->tmp.dh);
s->s3->tmp.dh = NULL;
}
#endif
#ifndef OPENSSL_NO_ECDH
if (s->s3->tmp.ecdh != NULL)
{
EC_KEY_free(s->s3->tmp.ecdh);
s->s3->tmp.ecdh = NULL;
}
#endif
rp = s->s3->rbuf.buf;

22
ssl/s3_srvr.c
View File

@ -883,15 +883,20 @@ int ssl3_check_client_hello(SSL *s)
if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO)
{
/* Throw away what we have done so far in the current handshake,
* which will now be aborted. (A full SSL_clear would be too much.)
* I hope that tmp.dh is the only thing that may need to be cleared
* when a handshake is not completed ... */
* which will now be aborted. (A full SSL_clear would be too much.) */
#ifndef OPENSSL_NO_DH
if (s->s3->tmp.dh != NULL)
{
DH_free(s->s3->tmp.dh);
s->s3->tmp.dh = NULL;
}
#endif
#ifndef OPENSSL_NO_ECDH
if (s->s3->tmp.ecdh != NULL)
{
EC_KEY_free(s->s3->tmp.ecdh);
s->s3->tmp.ecdh = NULL;
}
#endif
return 2;
}
@ -1622,7 +1627,6 @@ int ssl3_send_server_key_exchange(SSL *s)
if (s->s3->tmp.dh != NULL)
{
DH_free(dh);
SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
goto err;
}
@ -1683,7 +1687,6 @@ int ssl3_send_server_key_exchange(SSL *s)
if (s->s3->tmp.ecdh != NULL)
{
EC_KEY_free(s->s3->tmp.ecdh);
SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
goto err;
}
@ -1694,12 +1697,11 @@ int ssl3_send_server_key_exchange(SSL *s)
SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
goto err;
}
if (!EC_KEY_up_ref(ecdhp))
if ((ecdh = EC_KEY_dup(ecdhp)) == NULL)
{
SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
goto err;
}
ecdh = ecdhp;
s->s3->tmp.ecdh=ecdh;
if ((EC_KEY_get0_public_key(ecdh) == NULL) ||
@ -2611,6 +2613,12 @@ int ssl3_get_client_key_exchange(SSL *s)
/* Get encoded point length */
i = *p;
p += 1;
if (n != 1 + i)
{
SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
ERR_R_EC_LIB);
goto err;
}
if (EC_POINT_oct2point(group,
clnt_ecpoint, p, i, bn_ctx) == 0)
{