1 files changed, 69 insertions, 349 deletions

diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index 709f2296bdb4..35042d8f7338 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -27,7 +27,6 @@
 #include "md5.h"
 #include "cifs_unicode.h"
 #include "cifsproto.h"
-#include "ntlmssp.h"
 #include <linux/ctype.h>
 #include <linux/random.h>
 
@@ -43,43 +42,21 @@ extern void SMBencrypt(unsigned char *passwd, const unsigned char *c8,
                        unsigned char *p24);
 
 static int cifs_calculate_signature(const struct smb_hdr *cifs_pdu,
-                        struct TCP_Server_Info *server, char *signature)
+                                    const struct mac_key *key, char *signature)
 {
-        int rc;
+        struct  MD5Context context;
 
-        if (cifs_pdu == NULL || server == NULL || signature == NULL)
+        if ((cifs_pdu == NULL) || (signature == NULL) || (key == NULL))
                 return -EINVAL;
 
-        if (!server->ntlmssp.sdescmd5) {
-                cERROR(1,
-                        "cifs_calculate_signature: can't generate signature\n");
-                return -1;
-        }
-
-        rc = crypto_shash_init(&server->ntlmssp.sdescmd5->shash);
-        if (rc) {
-                cERROR(1, "cifs_calculate_signature: oould not init md5\n");
-                return rc;
-        }
-
-        if (server->secType == RawNTLMSSP)
-                crypto_shash_update(&server->ntlmssp.sdescmd5->shash,
-                        server->session_key.data.ntlmv2.key,
-                        CIFS_NTLMV2_SESSKEY_SIZE);
-        else
-                crypto_shash_update(&server->ntlmssp.sdescmd5->shash,
-                        (char *)&server->session_key.data,
-                        server->session_key.len);
-
-        crypto_shash_update(&server->ntlmssp.sdescmd5->shash,
-                        cifs_pdu->Protocol, cifs_pdu->smb_buf_length);
+        cifs_MD5_init(&context);
+        cifs_MD5_update(&context, (char *)&key->data, key->len);
+        cifs_MD5_update(&context, cifs_pdu->Protocol, cifs_pdu->smb_buf_length);
 
-        rc = crypto_shash_final(&server->ntlmssp.sdescmd5->shash, signature);
-
-        return rc;
+        cifs_MD5_final(signature, &context);
+        return 0;
 }
 
-
 int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
                   __u32 *pexpected_response_sequence_number)
 {
@@ -101,7 +78,8 @@ int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
         server->sequence_number++;
         spin_unlock(&GlobalMid_Lock);
 
-        rc = cifs_calculate_signature(cifs_pdu, server, smb_signature);
+        rc = cifs_calculate_signature(cifs_pdu, &server->mac_signing_key,
+                                      smb_signature);
         if (rc)
                 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
         else
@@ -111,39 +89,21 @@ int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
 }
 
 static int cifs_calc_signature2(const struct kvec *iov, int n_vec,
-                        struct TCP_Server_Info *server, char *signature)
+                                const struct mac_key *key, char *signature)
 {
+        struct  MD5Context context;
         int i;
-        int rc;
 
-        if (iov == NULL || server == NULL || signature == NULL)
+        if ((iov == NULL) || (signature == NULL) || (key == NULL))
                 return -EINVAL;
 
-        if (!server->ntlmssp.sdescmd5) {
-                cERROR(1, "cifs_calc_signature2: can't generate signature\n");
-                return -1;
-        }
-
-        rc = crypto_shash_init(&server->ntlmssp.sdescmd5->shash);
-        if (rc) {
-                cERROR(1, "cifs_calc_signature2: oould not init md5\n");
-                return rc;
-        }
-
-        if (server->secType == RawNTLMSSP)
-                crypto_shash_update(&server->ntlmssp.sdescmd5->shash,
-                        server->session_key.data.ntlmv2.key,
-                        CIFS_NTLMV2_SESSKEY_SIZE);
-        else
-                crypto_shash_update(&server->ntlmssp.sdescmd5->shash,
-                        (char *)&server->session_key.data,
-                        server->session_key.len);
-
+        cifs_MD5_init(&context);
+        cifs_MD5_update(&context, (char *)&key->data, key->len);
         for (i = 0; i < n_vec; i++) {
                 if (iov[i].iov_len == 0)
                         continue;
                 if (iov[i].iov_base == NULL) {
-                        cERROR(1, "cifs_calc_signature2: null iovec entry");
+                        cERROR(1, "null iovec entry");
                         return -EIO;
                 }
                 /* The first entry includes a length field (which does not get
@@ -151,18 +111,18 @@ static int cifs_calc_signature2(const struct kvec *iov, int n_vec,
                 if (i == 0) {
                         if (iov[0].iov_len <= 8) /* cmd field at offset 9 */
                                 break; /* nothing to sign or corrupt header */
-                        crypto_shash_update(&server->ntlmssp.sdescmd5->shash,
-                                iov[i].iov_base + 4, iov[i].iov_len - 4);
+                        cifs_MD5_update(&context, iov[0].iov_base+4,
+                                  iov[0].iov_len-4);
                 } else
-                        crypto_shash_update(&server->ntlmssp.sdescmd5->shash,
-                                iov[i].iov_base, iov[i].iov_len);
+                        cifs_MD5_update(&context, iov[i].iov_base, iov[i].iov_len);
         }
 
-        rc = crypto_shash_final(&server->ntlmssp.sdescmd5->shash, signature);
+        cifs_MD5_final(signature, &context);
 
-        return rc;
+        return 0;
 }
 
+
 int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
                    __u32 *pexpected_response_sequence_number)
 {
@@ -185,7 +145,8 @@ int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
         server->sequence_number++;
         spin_unlock(&GlobalMid_Lock);
 
-        rc = cifs_calc_signature2(iov, n_vec, server, smb_signature);
+        rc = cifs_calc_signature2(iov, n_vec, &server->mac_signing_key,
+                                      smb_signature);
         if (rc)
                 memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
         else
@@ -195,14 +156,14 @@ int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
 }
 
 int cifs_verify_signature(struct smb_hdr *cifs_pdu,
-                          struct TCP_Server_Info *server,
+                          const struct mac_key *mac_key,
                           __u32 expected_sequence_number)
 {
-        int rc;
+        unsigned int rc;
         char server_response_sig[8];
         char what_we_think_sig_should_be[20];
 
-        if (cifs_pdu == NULL || server == NULL)
+        if ((cifs_pdu == NULL) || (mac_key == NULL))
                 return -EINVAL;
 
         if (cifs_pdu->Command == SMB_COM_NEGOTIATE)
@@ -231,7 +192,7 @@ int cifs_verify_signature(struct smb_hdr *cifs_pdu,
                                         cpu_to_le32(expected_sequence_number);
         cifs_pdu->Signature.Sequence.Reserved = 0;
 
-        rc = cifs_calculate_signature(cifs_pdu, server,
+        rc = cifs_calculate_signature(cifs_pdu, mac_key,
                 what_we_think_sig_should_be);
 
         if (rc)
@@ -248,7 +209,7 @@ int cifs_verify_signature(struct smb_hdr *cifs_pdu,
 }
 
 /* We fill in key by putting in 40 byte array which was allocated by caller */
-int cifs_calculate_session_key(struct session_key *key, const char *rn,
+int cifs_calculate_mac_key(struct mac_key *key, const char *rn,
                            const char *password)
 {
         char temp_key[16];
@@ -306,52 +267,38 @@ static int calc_ntlmv2_hash(struct cifsSesInfo *ses,
 {
         int rc = 0;
         int len;
-        char nt_hash[CIFS_NTHASH_SIZE];
+        char nt_hash[16];
+        struct HMACMD5Context *pctxt;
         wchar_t *user;
         wchar_t *domain;
-        wchar_t *server;
 
-        if (!ses->server->ntlmssp.sdeschmacmd5) {
-                cERROR(1, "calc_ntlmv2_hash: can't generate ntlmv2 hash\n");
-                return -1;
-        }
+        pctxt = kmalloc(sizeof(struct HMACMD5Context), GFP_KERNEL);
+
+        if (pctxt == NULL)
+                return -ENOMEM;
 
         /* calculate md4 hash of password */
         E_md4hash(ses->password, nt_hash);
 
-        crypto_shash_setkey(ses->server->ntlmssp.hmacmd5, nt_hash,
-                                CIFS_NTHASH_SIZE);
-
-        rc = crypto_shash_init(&ses->server->ntlmssp.sdeschmacmd5->shash);
-        if (rc) {
-                cERROR(1, "calc_ntlmv2_hash: could not init hmacmd5\n");
-                return rc;
-        }
+        /* convert Domainname to unicode and uppercase */
+        hmac_md5_init_limK_to_64(nt_hash, 16, pctxt);
 
         /* convert ses->userName to unicode and uppercase */
         len = strlen(ses->userName);
         user = kmalloc(2 + (len * 2), GFP_KERNEL);
-        if (user == NULL) {
-                cERROR(1, "calc_ntlmv2_hash: user mem alloc failure\n");
-                rc = -ENOMEM;
+        if (user == NULL)
                 goto calc_exit_2;
-        }
         len = cifs_strtoUCS((__le16 *)user, ses->userName, len, nls_cp);
         UniStrupr(user);
-
-        crypto_shash_update(&ses->server->ntlmssp.sdeschmacmd5->shash,
-                                (char *)user, 2 * len);
+        hmac_md5_update((char *)user, 2*len, pctxt);
 
         /* convert ses->domainName to unicode and uppercase */
         if (ses->domainName) {
                 len = strlen(ses->domainName);
 
                 domain = kmalloc(2 + (len * 2), GFP_KERNEL);
-                if (domain == NULL) {
-                        cERROR(1, "calc_ntlmv2_hash: domain mem alloc failure");
-                        rc = -ENOMEM;
+                if (domain == NULL)
                         goto calc_exit_1;
-                }
                 len = cifs_strtoUCS((__le16 *)domain, ses->domainName, len,
                                         nls_cp);
                 /* the following line was removed since it didn't work well
@@ -359,292 +306,65 @@ static int calc_ntlmv2_hash(struct cifsSesInfo *ses,
                    Maybe converting the domain name earlier makes sense */
                 /* UniStrupr(domain); */
 
-                crypto_shash_update(&ses->server->ntlmssp.sdeschmacmd5->shash,
-                                        (char *)domain, 2 * len);
+                hmac_md5_update((char *)domain, 2*len, pctxt);
 
                 kfree(domain);
-        } else if (ses->serverName) {
-                len = strlen(ses->serverName);
-
-                server = kmalloc(2 + (len * 2), GFP_KERNEL);
-                if (server == NULL) {
-                        cERROR(1, "calc_ntlmv2_hash: server mem alloc failure");
-                        rc = -ENOMEM;
-                        goto calc_exit_1;
-                }
-                len = cifs_strtoUCS((__le16 *)server, ses->serverName, len,
-                                        nls_cp);
-                /* the following line was removed since it didn't work well
-                   with lower cased domain name that passed as an option.
-                   Maybe converting the domain name earlier makes sense */
-                /* UniStrupr(domain); */
-
-                crypto_shash_update(&ses->server->ntlmssp.sdeschmacmd5->shash,
-                                        (char *)server, 2 * len);
-
-                kfree(server);
         }
-
-        rc = crypto_shash_final(&ses->server->ntlmssp.sdeschmacmd5->shash,
-                                        ses->server->ntlmv2_hash);
-
 calc_exit_1:
         kfree(user);
 calc_exit_2:
         /* BB FIXME what about bytes 24 through 40 of the signing key?
            compare with the NTLM example */
+        hmac_md5_final(ses->server->ntlmv2_hash, pctxt);
 
+        kfree(pctxt);
         return rc;
 }
 
-static int
-find_domain_name(struct cifsSesInfo *ses)
-{
-        int rc = 0;
-        unsigned int attrsize;
-        unsigned int type;
-        unsigned char *blobptr;
-        struct ntlmssp2_name *attrptr;
-
-        if (ses->server->tiblob) {
-                blobptr = ses->server->tiblob;
-                attrptr = (struct ntlmssp2_name *) blobptr;
-
-                while ((type = attrptr->type) != 0) {
-                        blobptr += 2; /* advance attr type */
-                        attrsize = attrptr->length;
-                        blobptr += 2; /* advance attr size */
-                        if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
-                                if (!ses->domainName) {
-                                        ses->domainName =
-                                                kmalloc(attrptr->length + 1,
-                                                                GFP_KERNEL);
-                                        if (!ses->domainName)
-                                                        return -ENOMEM;
-                                        cifs_from_ucs2(ses->domainName,
-                                                (__le16 *)blobptr,
-                                                attrptr->length,
-                                                attrptr->length,
-                                                load_nls_default(), false);
-                                }
-                        }
-                        blobptr += attrsize; /* advance attr  value */
-                        attrptr = (struct ntlmssp2_name *) blobptr;
-                }
-        } else {
-                ses->server->tilen = 2 * sizeof(struct ntlmssp2_name);
-                ses->server->tiblob = kmalloc(ses->server->tilen, GFP_KERNEL);
-                if (!ses->server->tiblob) {
-                        ses->server->tilen = 0;
-                        cERROR(1, "Challenge target info allocation failure");
-                        return -ENOMEM;
-                }
-                memset(ses->server->tiblob, 0x0, ses->server->tilen);
-                attrptr = (struct ntlmssp2_name *) ses->server->tiblob;
-                attrptr->type = cpu_to_le16(NTLMSSP_DOMAIN_TYPE);
-        }
-
-        return rc;
-}
-
-static int
-CalcNTLMv2_response(const struct TCP_Server_Info *server,
-                         char *v2_session_response)
-{
-        int rc;
-
-        if (!server->ntlmssp.sdeschmacmd5) {
-                cERROR(1, "calc_ntlmv2_hash: can't generate ntlmv2 hash\n");
-                return -1;
-        }
-
-        crypto_shash_setkey(server->ntlmssp.hmacmd5, server->ntlmv2_hash,
-                CIFS_HMAC_MD5_HASH_SIZE);
-
-        rc = crypto_shash_init(&server->ntlmssp.sdeschmacmd5->shash);
-        if (rc) {
-                cERROR(1, "CalcNTLMv2_response: could not init hmacmd5");
-                return rc;
-        }
-
-        memcpy(v2_session_response + CIFS_SERVER_CHALLENGE_SIZE,
-                server->cryptKey, CIFS_SERVER_CHALLENGE_SIZE);
-        crypto_shash_update(&server->ntlmssp.sdeschmacmd5->shash,
-                v2_session_response + CIFS_SERVER_CHALLENGE_SIZE,
-                sizeof(struct ntlmv2_resp) - CIFS_SERVER_CHALLENGE_SIZE);
-
-        if (server->tilen)
-                crypto_shash_update(&server->ntlmssp.sdeschmacmd5->shash,
-                                        server->tiblob, server->tilen);
-
-        rc = crypto_shash_final(&server->ntlmssp.sdeschmacmd5->shash,
-                                        v2_session_response);
-
-        return rc;
-}
-
-int
-setup_ntlmv2_rsp(struct cifsSesInfo *ses, char *resp_buf,
+void setup_ntlmv2_rsp(struct cifsSesInfo *ses, char *resp_buf,
                       const struct nls_table *nls_cp)
 {
-        int rc = 0;
+        int rc;
         struct ntlmv2_resp *buf = (struct ntlmv2_resp *)resp_buf;
+        struct HMACMD5Context context;
 
         buf->blob_signature = cpu_to_le32(0x00000101);
         buf->reserved = 0;
         buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
         get_random_bytes(&buf->client_chal, sizeof(buf->client_chal));
         buf->reserved2 = 0;
-
-        if (!ses->domainName) {
-                rc = find_domain_name(ses);
-                if (rc) {
-                        cERROR(1, "could not get domain/server name rc %d", rc);
-                        return rc;
-                }
-        }
+        buf->names[0].type = cpu_to_le16(NTLMSSP_DOMAIN_TYPE);
+        buf->names[0].length = 0;
+        buf->names[1].type = 0;
+        buf->names[1].length = 0;
 
         /* calculate buf->ntlmv2_hash */
         rc = calc_ntlmv2_hash(ses, nls_cp);
-        if (rc) {
-                cERROR(1, "could not get v2 hash rc %d", rc);
-                return rc;
-        }
-        rc = CalcNTLMv2_response(ses->server, resp_buf);
-        if (rc) {
+        if (rc)
                 cERROR(1, "could not get v2 hash rc %d", rc);
-                return rc;
-        }
-
-        if (!ses->server->ntlmssp.sdeschmacmd5) {
-                cERROR(1, "calc_ntlmv2_hash: can't generate ntlmv2 hash\n");
-                return -1;
-        }
-
-        crypto_shash_setkey(ses->server->ntlmssp.hmacmd5,
-                        ses->server->ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
+        CalcNTLMv2_response(ses, resp_buf);
 
-        rc = crypto_shash_init(&ses->server->ntlmssp.sdeschmacmd5->shash);
-        if (rc) {
-                cERROR(1, "setup_ntlmv2_rsp: could not init hmacmd5\n");
-                return rc;
-        }
+        /* now calculate the MAC key for NTLMv2 */
+        hmac_md5_init_limK_to_64(ses->server->ntlmv2_hash, 16, &context);
+        hmac_md5_update(resp_buf, 16, &context);
+        hmac_md5_final(ses->server->mac_signing_key.data.ntlmv2.key, &context);
 
-        crypto_shash_update(&ses->server->ntlmssp.sdeschmacmd5->shash,
-                                resp_buf, CIFS_HMAC_MD5_HASH_SIZE);
-
-        rc = crypto_shash_final(&ses->server->ntlmssp.sdeschmacmd5->shash,
-                ses->server->session_key.data.ntlmv2.key);
-
-        memcpy(&ses->server->session_key.data.ntlmv2.resp, resp_buf,
-                        sizeof(struct ntlmv2_resp));
-        ses->server->session_key.len = 16 + sizeof(struct ntlmv2_resp);
-
-        return rc;
+        memcpy(&ses->server->mac_signing_key.data.ntlmv2.resp, resp_buf,
+               sizeof(struct ntlmv2_resp));
+        ses->server->mac_signing_key.len = 16 + sizeof(struct ntlmv2_resp);
 }
 
-int
-calc_seckey(struct TCP_Server_Info *server)
-{
-        int rc;
-        unsigned char sec_key[CIFS_NTLMV2_SESSKEY_SIZE];
-        struct crypto_blkcipher *tfm_arc4;
-        struct scatterlist sgin, sgout;
-        struct blkcipher_desc desc;
-
-        get_random_bytes(sec_key, CIFS_NTLMV2_SESSKEY_SIZE);
-
-        tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)",
-                                                0, CRYPTO_ALG_ASYNC);
-        if (!tfm_arc4 || IS_ERR(tfm_arc4)) {
-                cERROR(1, "could not allocate " "master crypto API arc4\n");
-                return 1;
-        }
-
-        desc.tfm = tfm_arc4;
-
-        crypto_blkcipher_setkey(tfm_arc4,
-                server->session_key.data.ntlmv2.key, CIFS_CPHTXT_SIZE);
-        sg_init_one(&sgin, sec_key, CIFS_CPHTXT_SIZE);
-        sg_init_one(&sgout, server->ntlmssp.ciphertext, CIFS_CPHTXT_SIZE);
-        rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, CIFS_CPHTXT_SIZE);
-
-        if (!rc)
-                memcpy(server->session_key.data.ntlmv2.key,
-                                sec_key, CIFS_NTLMV2_SESSKEY_SIZE);
-
-        crypto_free_blkcipher(tfm_arc4);
-
-        return 0;
-}
-
-void
-cifs_crypto_shash_release(struct TCP_Server_Info *server)
-{
-        if (server->ntlmssp.md5)
-                crypto_free_shash(server->ntlmssp.md5);
-
-        if (server->ntlmssp.hmacmd5)
-                crypto_free_shash(server->ntlmssp.hmacmd5);
-
-        kfree(server->ntlmssp.sdeschmacmd5);
-
-        kfree(server->ntlmssp.sdescmd5);
-}
-
-int
-cifs_crypto_shash_allocate(struct TCP_Server_Info *server)
+void CalcNTLMv2_response(const struct cifsSesInfo *ses,
+                         char *v2_session_response)
 {
-        int rc;
-        unsigned int size;
-
-        server->ntlmssp.hmacmd5 = crypto_alloc_shash("hmac(md5)", 0, 0);
-        if (!server->ntlmssp.hmacmd5 ||
-                        IS_ERR(server->ntlmssp.hmacmd5)) {
-                cERROR(1, "could not allocate crypto hmacmd5\n");
-                return 1;
-        }
-
-        server->ntlmssp.md5 = crypto_alloc_shash("md5", 0, 0);
-        if (!server->ntlmssp.md5 || IS_ERR(server->ntlmssp.md5)) {
-                cERROR(1, "could not allocate crypto md5\n");
-                rc = 1;
-                goto cifs_crypto_shash_allocate_ret1;
-        }
-
-        size = sizeof(struct shash_desc) +
-                        crypto_shash_descsize(server->ntlmssp.hmacmd5);
-        server->ntlmssp.sdeschmacmd5 = kmalloc(size, GFP_KERNEL);
-        if (!server->ntlmssp.sdeschmacmd5) {
-                cERROR(1, "cifs_crypto_shash_allocate: can't alloc hmacmd5\n");
-                rc = -ENOMEM;
-                goto cifs_crypto_shash_allocate_ret2;
-        }
-        server->ntlmssp.sdeschmacmd5->shash.tfm = server->ntlmssp.hmacmd5;
-        server->ntlmssp.sdeschmacmd5->shash.flags = 0x0;
+        struct HMACMD5Context context;
+        /* rest of v2 struct already generated */
+        memcpy(v2_session_response + 8, ses->server->cryptKey, 8);
+        hmac_md5_init_limK_to_64(ses->server->ntlmv2_hash, 16, &context);
 
+        hmac_md5_update(v2_session_response+8,
+                        sizeof(struct ntlmv2_resp) - 8, &context);
 
-        size = sizeof(struct shash_desc) +
-                        crypto_shash_descsize(server->ntlmssp.md5);
-        server->ntlmssp.sdescmd5 = kmalloc(size, GFP_KERNEL);
-        if (!server->ntlmssp.sdescmd5) {
-                cERROR(1, "cifs_crypto_shash_allocate: can't alloc md5\n");
-                rc = -ENOMEM;
-                goto cifs_crypto_shash_allocate_ret3;
-        }
-        server->ntlmssp.sdescmd5->shash.tfm = server->ntlmssp.md5;
-        server->ntlmssp.sdescmd5->shash.flags = 0x0;
-
-        return 0;
-
-cifs_crypto_shash_allocate_ret3:
-        kfree(server->ntlmssp.sdeschmacmd5);
-
-cifs_crypto_shash_allocate_ret2:
-        crypto_free_shash(server->ntlmssp.md5);
-
-cifs_crypto_shash_allocate_ret1:
-        crypto_free_shash(server->ntlmssp.hmacmd5);
-
-        return rc;
+        hmac_md5_final(v2_session_response, &context);
+/*      cifs_dump_mem("v2_sess_rsp: ", v2_session_response, 32); */
 }