From 4e53a3fb98d3d5c2941d2e7199dab317a9d4ead3 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Fri, 5 Dec 2008 20:41:21 -0500 Subject: cifs: have calc_lanman_hash take more granular args cifs: have calc_lanman_hash take more granular args We need to use this routine to encrypt passwords associated with the tcon too. Don't assume that the password will be attached to the smb_session. Also, make some of the values in the lower encryption functions const since they aren't changed. Signed-off-by: Jeff Layton Signed-off-by: Steve French diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c index bd5f13d..d4839cf 100644 --- a/fs/cifs/cifsencrypt.c +++ b/fs/cifs/cifsencrypt.c @@ -37,7 +37,7 @@ extern void mdfour(unsigned char *out, unsigned char *in, int n); extern void E_md4hash(const unsigned char *passwd, unsigned char *p16); -extern void SMBencrypt(unsigned char *passwd, unsigned char *c8, +extern void SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24); static int cifs_calculate_signature(const struct smb_hdr *cifs_pdu, @@ -280,25 +280,22 @@ int CalcNTLMv2_partial_mac_key(struct cifsSesInfo *ses, } #ifdef CONFIG_CIFS_WEAK_PW_HASH -void calc_lanman_hash(struct cifsSesInfo *ses, char *lnm_session_key) +void calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt, + char *lnm_session_key) { int i; char password_with_pad[CIFS_ENCPWD_SIZE]; - if (ses->server == NULL) - return; - memset(password_with_pad, 0, CIFS_ENCPWD_SIZE); - if (ses->password) - strncpy(password_with_pad, ses->password, CIFS_ENCPWD_SIZE); - - if ((ses->server->secMode & SECMODE_PW_ENCRYPT) == 0) - if (extended_security & CIFSSEC_MAY_PLNTXT) { - memset(lnm_session_key, 0, CIFS_SESS_KEY_SIZE); - memcpy(lnm_session_key, password_with_pad, - CIFS_ENCPWD_SIZE); - return; - } + if (password) + strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE); + + if (!encrypt && extended_security & CIFSSEC_MAY_PLNTXT) { + memset(lnm_session_key, 0, CIFS_SESS_KEY_SIZE); + memcpy(lnm_session_key, password_with_pad, + CIFS_ENCPWD_SIZE); + return; + } /* calculate old style session key */ /* calling toupper is less broken than repeatedly @@ -314,7 +311,8 @@ void calc_lanman_hash(struct cifsSesInfo *ses, char *lnm_session_key) for (i = 0; i < CIFS_ENCPWD_SIZE; i++) password_with_pad[i] = toupper(password_with_pad[i]); - SMBencrypt(password_with_pad, ses->server->cryptKey, lnm_session_key); + SMBencrypt(password_with_pad, cryptkey, lnm_session_key); + /* clear password before we return/free memory */ memset(password_with_pad, 0, CIFS_ENCPWD_SIZE); } diff --git a/fs/cifs/cifsencrypt.h b/fs/cifs/cifsencrypt.h index 152fa2d..15d2ec0 100644 --- a/fs/cifs/cifsencrypt.h +++ b/fs/cifs/cifsencrypt.h @@ -26,7 +26,8 @@ extern void mdfour(unsigned char *out, unsigned char *in, int n); /* smbdes.c */ extern void E_P16(unsigned char *p14, unsigned char *p16); -extern void E_P24(unsigned char *p21, unsigned char *c8, unsigned char *p24); +extern void E_P24(unsigned char *p21, const unsigned char *c8, + unsigned char *p24); diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 6f21ecb..f486165 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -330,7 +330,8 @@ extern void CalcNTLMv2_response(const struct cifsSesInfo *, char *); extern void setup_ntlmv2_rsp(struct cifsSesInfo *, char *, const struct nls_table *); #ifdef CONFIG_CIFS_WEAK_PW_HASH -extern void calc_lanman_hash(struct cifsSesInfo *ses, char *lnm_session_key); +extern void calc_lanman_hash(const char *password, const char *cryptkey, + bool encrypt, char *lnm_session_key); #endif /* CIFS_WEAK_PW_HASH */ extern int CIFSSMBCopy(int xid, struct cifsTconInfo *source_tcon, diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 6107ee4..3a84a37 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -3533,7 +3533,10 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, #ifdef CONFIG_CIFS_WEAK_PW_HASH if ((extended_security & CIFSSEC_MAY_LANMAN) && (ses->server->secType == LANMAN)) - calc_lanman_hash(ses, bcc_ptr); + calc_lanman_hash(ses->password, ses->server->cryptKey, + ses->server->secMode & + SECMODE_PW_ENCRYPT ? true : false, + bcc_ptr); else #endif /* CIFS_WEAK_PW_HASH */ SMBNTencrypt(ses->password, diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c index 2851d5d..5f22de7 100644 --- a/fs/cifs/sess.c +++ b/fs/cifs/sess.c @@ -417,7 +417,10 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time, /* BB calculate hash with password */ /* and copy into bcc */ - calc_lanman_hash(ses, lnm_session_key); + calc_lanman_hash(ses->password, ses->server->cryptKey, + ses->server->secMode & SECMODE_PW_ENCRYPT ? + true : false, lnm_session_key); + ses->flags |= CIFS_SES_LANMAN; memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE); bcc_ptr += CIFS_SESS_KEY_SIZE; diff --git a/fs/cifs/smbdes.c b/fs/cifs/smbdes.c index 04943c9..224a1f4 100644 --- a/fs/cifs/smbdes.c +++ b/fs/cifs/smbdes.c @@ -318,7 +318,8 @@ str_to_key(unsigned char *str, unsigned char *key) } static void -smbhash(unsigned char *out, unsigned char *in, unsigned char *key, int forw) +smbhash(unsigned char *out, const unsigned char *in, unsigned char *key, + int forw) { int i; char *outb; /* outb[64] */ @@ -363,7 +364,7 @@ E_P16(unsigned char *p14, unsigned char *p16) } void -E_P24(unsigned char *p21, unsigned char *c8, unsigned char *p24) +E_P24(unsigned char *p21, const unsigned char *c8, unsigned char *p24) { smbhash(p24, c8, p21, 1); smbhash(p24 + 8, c8, p21 + 7, 1); diff --git a/fs/cifs/smbencrypt.c b/fs/cifs/smbencrypt.c index ff3232f..93fb09a 100644 --- a/fs/cifs/smbencrypt.c +++ b/fs/cifs/smbencrypt.c @@ -49,9 +49,10 @@ /*The following definitions come from libsmb/smbencrypt.c */ -void SMBencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24); +void SMBencrypt(unsigned char *passwd, const unsigned char *c8, + unsigned char *p24); void E_md4hash(const unsigned char *passwd, unsigned char *p16); -static void SMBOWFencrypt(unsigned char passwd[16], unsigned char *c8, +static void SMBOWFencrypt(unsigned char passwd[16], const unsigned char *c8, unsigned char p24[24]); void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24); @@ -61,7 +62,7 @@ void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24); encrypted password into p24 */ /* Note that password must be uppercased and null terminated */ void -SMBencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24) +SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24) { unsigned char p14[15], p21[21]; @@ -212,7 +213,7 @@ ntv2_owf_gen(const unsigned char owf[16], const char *user_n, /* Does the des encryption from the NT or LM MD4 hash. */ static void -SMBOWFencrypt(unsigned char passwd[16], unsigned char *c8, +SMBOWFencrypt(unsigned char passwd[16], const unsigned char *c8, unsigned char p24[24]) { unsigned char p21[21]; -- cgit v0.10.2