diff options
| author | james <james@e7ae566f-a301-0410-adde-c780ea21d3b5> | 2008-07-17 05:09:27 +0000 |
|---|---|---|
| committer | james <james@e7ae566f-a301-0410-adde-c780ea21d3b5> | 2008-07-17 05:09:27 +0000 |
| commit | e691cd568ab5a0e34924a3b80693af6125209d76 (patch) | |
| tree | 66ac0db42a44c88fa4efb2ab602681eb14aab719 /ntlm.c | |
| parent | Fixed issue in read_key_file, where the return value of (diff) | |
| download | openvpn-e691cd568ab5a0e34924a3b80693af6125209d76.tar.xz | |
Fixed a potential information leak in the new NTLM phase 3 code,
as well as a failure of the code to check the return value from
base64_decode.
Fixed compiler warnings in the new NTLM phase 3 code about implicit
casting between signed and unsigned char *.
git-svn-id: http://svn.openvpn.net/projects/openvpn/branches/BETA21/openvpn@3064 e7ae566f-a301-0410-adde-c780ea21d3b5
Diffstat (limited to 'ntlm.c')
| -rw-r--r-- | ntlm.c | 17 |
1 files changed, 11 insertions, 6 deletions
@@ -88,8 +88,8 @@ gen_hmac_md5 (const char* data, int data_len, const char* key, int key_len,char HMAC_CTX c; HMAC_Init (&c, key, key_len, EVP_md5()); - HMAC_Update (&c, data, data_len); - HMAC_Final (&c, result, &len); + HMAC_Update (&c, (const unsigned char *)data, data_len); + HMAC_Final (&c, (unsigned char *)result, &len); HMAC_CTX_cleanup(&c); } @@ -215,6 +215,8 @@ ntlm_phase_3 (const struct http_proxy_info *p, const char *phase_2, struct gc_ar bool ntlmv2_enabled = (p->auth_method == HTTP_AUTH_NTLM2); + CLEAR (buf2); + ASSERT (strlen (p->up.username) > 0); ASSERT (strlen (p->up.password) > 0); @@ -241,6 +243,9 @@ ntlm_phase_3 (const struct http_proxy_info *p, const char *phase_2, struct gc_ar memset (md4_hash + 16, 0, 5); ret_val = base64_decode( phase_2, (void *)buf2); + if (ret_val < 0) + return NULL; + /* we can be sure that phase_2 is less than 128 * therefore buf2 needs to be (3/4 * 128) */ @@ -253,7 +258,7 @@ ntlm_phase_3 (const struct http_proxy_info *p, const char *phase_2, struct gc_ar if (ntlmv2_enabled){ /* Generate NTLMv2 response */ /* NTLMv2 hash */ - my_strupr(strcpy(userdomain, username)); + my_strupr((unsigned char *)strcpy(userdomain, username)); if (strlen(username) + strlen(domain) < sizeof(userdomain)) strcat(userdomain, domain); else @@ -266,8 +271,8 @@ ntlm_phase_3 (const struct http_proxy_info *p, const char *phase_2, struct gc_ar ntlmv2_blob[0x00]=1; /* Signature */ ntlmv2_blob[0x01]=1; /* Signature */ ntlmv2_blob[0x04]=0; /* Reserved */ - gen_timestamp(&ntlmv2_blob[0x08]); /* 64-bit Timestamp */ - gen_nonce(&ntlmv2_blob[0x10]); /* 64-bit Client Nonce */ + gen_timestamp((unsigned char *)&ntlmv2_blob[0x08]); /* 64-bit Timestamp */ + gen_nonce((unsigned char *)&ntlmv2_blob[0x10]); /* 64-bit Client Nonce */ ntlmv2_blob[0x18]=0; /* Unknown, zero should work */ /* Add target information block to the blob */ @@ -313,7 +318,7 @@ ntlm_phase_3 (const struct http_proxy_info *p, const char *phase_2, struct gc_ar memset (phase3, 0, sizeof (phase3)); /* clear reply */ - strcpy (phase3, "NTLMSSP\0"); /* signature */ + strcpy ((char *)phase3, "NTLMSSP\0"); /* signature */ phase3[8] = 3; /* type 3 */ if (ntlmv2_enabled){ /* NTLMv2 response */ |