mschaputil: Exlude domain name from challenge generation
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cd00416168
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@ -113,6 +113,20 @@ bool mschap_nt_password_hash(const char *password, uint8_t *password_hash)
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return true;
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return true;
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}
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}
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static const char *mschapv2_exlude_domain_name(const char *username)
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{
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const char *c;
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for (c = username; *c; c++) {
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if (*c != '\\')
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continue;
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return c + 1;
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}
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return username;
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}
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/**
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/**
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* Internal function to generate the challenge used in nt_response
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* Internal function to generate the challenge used in nt_response
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* https://tools.ietf.org/html/rfc2759
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* https://tools.ietf.org/html/rfc2759
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@ -126,7 +140,8 @@ bool mschap_nt_password_hash(const char *password, uint8_t *password_hash)
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**/
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**/
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static bool mschapv2_challenge_hash(const uint8_t *peer_challenge,
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static bool mschapv2_challenge_hash(const uint8_t *peer_challenge,
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const uint8_t *server_challenge,
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const uint8_t *server_challenge,
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const char *user, uint8_t challenge[static 8])
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const char *username,
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uint8_t challenge[static 8])
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{
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{
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struct l_checksum *check;
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struct l_checksum *check;
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@ -134,9 +149,11 @@ static bool mschapv2_challenge_hash(const uint8_t *peer_challenge,
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if (!check)
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if (!check)
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return false;
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return false;
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username = mschapv2_exlude_domain_name(username);
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l_checksum_update(check, peer_challenge, 16);
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l_checksum_update(check, peer_challenge, 16);
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l_checksum_update(check, server_challenge, 16);
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l_checksum_update(check, server_challenge, 16);
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l_checksum_update(check, user, strlen(user));
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l_checksum_update(check, username, strlen(username));
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l_checksum_get_digest(check, challenge, 8);
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l_checksum_get_digest(check, challenge, 8);
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l_checksum_free(check);
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l_checksum_free(check);
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