bool SMBNTLMv2encrypt_hash(TALLOC_CTX *mem_ctx,
const char *user, const char *domain, const uint8_t nt_hash[16],
const DATA_BLOB *server_chal,
const DATA_BLOB *names_blob,
DATA_BLOB *lm_response, DATA_BLOB *nt_response,
DATA_BLOB *lm_session_key, DATA_BLOB *user_session_key)
{
uint8_t ntlm_v2_hash[16];
/* We don't use the NT# directly. Instead we use it mashed up with
the username and domain.
This prevents username swapping during the auth exchange
*/
if (!ntv2_owf_gen(nt_hash, user, domain, ntlm_v2_hash)) {
return false;
}
if (nt_response) {
*nt_response = NTLMv2_generate_response(mem_ctx,
ntlm_v2_hash, server_chal,
names_blob);
if (user_session_key) {
*user_session_key = data_blob_talloc(mem_ctx, NULL, 16);
/* The NTLMv2 calculations also provide a session key, for signing etc later */
/* use only the first 16 bytes of nt_response for session key */
SMBsesskeygen_ntv2(ntlm_v2_hash, nt_response->data, user_session_key->data);
}
}
/* LMv2 */
if (lm_response) {
*lm_response = LMv2_generate_response(mem_ctx,
ntlm_v2_hash, server_chal);
if (lm_session_key) {
*lm_session_key = data_blob_talloc(mem_ctx, NULL, 16);
/* The NTLMv2 calculations also provide a session key, for signing etc later */
/* use only the first 16 bytes of lm_response for session key */
SMBsesskeygen_ntv2(ntlm_v2_hash, lm_response->data, lm_session_key->data);
}
}
return true;
}
BOOL SMBNTLMv2encrypt(const char *user, const char *domain, const char *password,
const DATA_BLOB *server_chal,
const DATA_BLOB *names_blob,
DATA_BLOB *lm_response, DATA_BLOB *nt_response,
DATA_BLOB *user_session_key)
{
uchar nt_hash[16];
uchar ntlm_v2_hash[16];
E_md4hash(password, nt_hash);
/* We don't use the NT# directly. Instead we use it mashed up with
the username and domain.
This prevents username swapping during the auth exchange
*/
if (!ntv2_owf_gen(nt_hash, user, domain, True, ntlm_v2_hash)) {
return False;
}
if (nt_response) {
*nt_response = NTLMv2_generate_response(ntlm_v2_hash, server_chal,
names_blob);
if (user_session_key) {
*user_session_key = data_blob(NULL, 16);
/* The NTLMv2 calculations also provide a session key, for signing etc later */
/* use only the first 16 bytes of nt_response for session key */
SMBsesskeygen_ntv2(ntlm_v2_hash, nt_response->data, user_session_key->data);
}
}
/* LMv2 */
if (lm_response) {
*lm_response = LMv2_generate_response(ntlm_v2_hash, server_chal);
}
return True;
}
