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- #include <linux/fs.h>
- #include <linux/slab.h>
- #include "cifspdu.h"
- #include "cifsglob.h"
- #include "cifs_debug.h"
- #include "cifs_unicode.h"
- #include "cifsproto.h"
- #include "ntlmssp.h"
- #include <linux/ctype.h>
- #include <linux/random.h>
- #include <linux/highmem.h>
- #include <crypto/skcipher.h>
- static int
- cifs_crypto_shash_md5_allocate(struct TCP_Server_Info *server)
- {
- int rc;
- unsigned int size;
- if (server->secmech.sdescmd5 != NULL)
- return 0;
- server->secmech.md5 = crypto_alloc_shash("md5", 0, 0);
- if (IS_ERR(server->secmech.md5)) {
- cifs_dbg(VFS, "could not allocate crypto md5\n");
- rc = PTR_ERR(server->secmech.md5);
- server->secmech.md5 = NULL;
- return rc;
- }
- size = sizeof(struct shash_desc) +
- crypto_shash_descsize(server->secmech.md5);
- server->secmech.sdescmd5 = kmalloc(size, GFP_KERNEL);
- if (!server->secmech.sdescmd5) {
- crypto_free_shash(server->secmech.md5);
- server->secmech.md5 = NULL;
- return -ENOMEM;
- }
- server->secmech.sdescmd5->shash.tfm = server->secmech.md5;
- server->secmech.sdescmd5->shash.flags = 0x0;
- return 0;
- }
- int __cifs_calc_signature(struct smb_rqst *rqst,
- struct TCP_Server_Info *server, char *signature,
- struct shash_desc *shash)
- {
- int i;
- int rc;
- struct kvec *iov = rqst->rq_iov;
- int n_vec = rqst->rq_nvec;
- for (i = 0; i < n_vec; i++) {
- if (iov[i].iov_len == 0)
- continue;
- if (iov[i].iov_base == NULL) {
- cifs_dbg(VFS, "null iovec entry\n");
- return -EIO;
- }
-
- if (i == 0) {
- if (iov[0].iov_len <= 8)
- break;
- rc = crypto_shash_update(shash,
- iov[i].iov_base + 4, iov[i].iov_len - 4);
- } else {
- rc = crypto_shash_update(shash,
- iov[i].iov_base, iov[i].iov_len);
- }
- if (rc) {
- cifs_dbg(VFS, "%s: Could not update with payload\n",
- __func__);
- return rc;
- }
- }
-
- for (i = 0; i < rqst->rq_npages; i++) {
- void *kaddr = kmap(rqst->rq_pages[i]);
- size_t len = rqst->rq_pagesz;
- if (i == rqst->rq_npages - 1)
- len = rqst->rq_tailsz;
- crypto_shash_update(shash, kaddr, len);
- kunmap(rqst->rq_pages[i]);
- }
- rc = crypto_shash_final(shash, signature);
- if (rc)
- cifs_dbg(VFS, "%s: Could not generate hash\n", __func__);
- return rc;
- }
- static int cifs_calc_signature(struct smb_rqst *rqst,
- struct TCP_Server_Info *server, char *signature)
- {
- int rc;
- if (!rqst->rq_iov || !signature || !server)
- return -EINVAL;
- if (!server->secmech.sdescmd5) {
- rc = cifs_crypto_shash_md5_allocate(server);
- if (rc) {
- cifs_dbg(VFS, "%s: Can't alloc md5 crypto\n", __func__);
- return -1;
- }
- }
- rc = crypto_shash_init(&server->secmech.sdescmd5->shash);
- if (rc) {
- cifs_dbg(VFS, "%s: Could not init md5\n", __func__);
- return rc;
- }
- rc = crypto_shash_update(&server->secmech.sdescmd5->shash,
- server->session_key.response, server->session_key.len);
- if (rc) {
- cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
- return rc;
- }
- return __cifs_calc_signature(rqst, server, signature,
- &server->secmech.sdescmd5->shash);
- }
- int cifs_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server,
- __u32 *pexpected_response_sequence_number)
- {
- int rc = 0;
- char smb_signature[20];
- struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
- if ((cifs_pdu == NULL) || (server == NULL))
- return -EINVAL;
- if (!(cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) ||
- server->tcpStatus == CifsNeedNegotiate)
- return rc;
- if (!server->session_estab) {
- memcpy(cifs_pdu->Signature.SecuritySignature, "BSRSPYL", 8);
- return rc;
- }
- cifs_pdu->Signature.Sequence.SequenceNumber =
- cpu_to_le32(server->sequence_number);
- cifs_pdu->Signature.Sequence.Reserved = 0;
- *pexpected_response_sequence_number = ++server->sequence_number;
- ++server->sequence_number;
- rc = cifs_calc_signature(rqst, server, smb_signature);
- if (rc)
- memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
- else
- memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
- return rc;
- }
- int cifs_sign_smbv(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
- __u32 *pexpected_response_sequence)
- {
- struct smb_rqst rqst = { .rq_iov = iov,
- .rq_nvec = n_vec };
- return cifs_sign_rqst(&rqst, server, pexpected_response_sequence);
- }
- int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
- __u32 *pexpected_response_sequence_number)
- {
- struct kvec iov;
- iov.iov_base = cifs_pdu;
- iov.iov_len = be32_to_cpu(cifs_pdu->smb_buf_length) + 4;
- return cifs_sign_smbv(&iov, 1, server,
- pexpected_response_sequence_number);
- }
- int cifs_verify_signature(struct smb_rqst *rqst,
- struct TCP_Server_Info *server,
- __u32 expected_sequence_number)
- {
- unsigned int rc;
- char server_response_sig[8];
- char what_we_think_sig_should_be[20];
- struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
- if (cifs_pdu == NULL || server == NULL)
- return -EINVAL;
- if (!server->session_estab)
- return 0;
- if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
- struct smb_com_lock_req *pSMB =
- (struct smb_com_lock_req *)cifs_pdu;
- if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
- return 0;
- }
-
-
- if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0)
- cifs_dbg(FYI, "dummy signature received for smb command 0x%x\n",
- cifs_pdu->Command);
-
- memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8);
- cifs_pdu->Signature.Sequence.SequenceNumber =
- cpu_to_le32(expected_sequence_number);
- cifs_pdu->Signature.Sequence.Reserved = 0;
- mutex_lock(&server->srv_mutex);
- rc = cifs_calc_signature(rqst, server, what_we_think_sig_should_be);
- mutex_unlock(&server->srv_mutex);
- if (rc)
- return rc;
- if (memcmp(server_response_sig, what_we_think_sig_should_be, 8))
- return -EACCES;
- else
- return 0;
- }
- int setup_ntlm_response(struct cifs_ses *ses, const struct nls_table *nls_cp)
- {
- int rc = 0;
- unsigned int temp_len = CIFS_SESS_KEY_SIZE + CIFS_AUTH_RESP_SIZE;
- char temp_key[CIFS_SESS_KEY_SIZE];
- if (!ses)
- return -EINVAL;
- ses->auth_key.response = kmalloc(temp_len, GFP_KERNEL);
- if (!ses->auth_key.response)
- return -ENOMEM;
- ses->auth_key.len = temp_len;
- rc = SMBNTencrypt(ses->password, ses->server->cryptkey,
- ses->auth_key.response + CIFS_SESS_KEY_SIZE, nls_cp);
- if (rc) {
- cifs_dbg(FYI, "%s Can't generate NTLM response, error: %d\n",
- __func__, rc);
- return rc;
- }
- rc = E_md4hash(ses->password, temp_key, nls_cp);
- if (rc) {
- cifs_dbg(FYI, "%s Can't generate NT hash, error: %d\n",
- __func__, rc);
- return rc;
- }
- rc = mdfour(ses->auth_key.response, temp_key, CIFS_SESS_KEY_SIZE);
- if (rc)
- cifs_dbg(FYI, "%s Can't generate NTLM session key, error: %d\n",
- __func__, rc);
- return rc;
- }
- #ifdef CONFIG_CIFS_WEAK_PW_HASH
- int calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
- char *lnm_session_key)
- {
- int i;
- int rc;
- char password_with_pad[CIFS_ENCPWD_SIZE] = {0};
- if (password)
- strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE);
- if (!encrypt && global_secflags & CIFSSEC_MAY_PLNTXT) {
- memcpy(lnm_session_key, password_with_pad,
- CIFS_ENCPWD_SIZE);
- return 0;
- }
-
-
- for (i = 0; i < CIFS_ENCPWD_SIZE; i++)
- password_with_pad[i] = toupper(password_with_pad[i]);
- rc = SMBencrypt(password_with_pad, cryptkey, lnm_session_key);
- return rc;
- }
- #endif
- static int
- build_avpair_blob(struct cifs_ses *ses, const struct nls_table *nls_cp)
- {
- unsigned int dlen;
- unsigned int size = 2 * sizeof(struct ntlmssp2_name);
- char *defdmname = "WORKGROUP";
- unsigned char *blobptr;
- struct ntlmssp2_name *attrptr;
- if (!ses->domainName) {
- ses->domainName = kstrdup(defdmname, GFP_KERNEL);
- if (!ses->domainName)
- return -ENOMEM;
- }
- dlen = strlen(ses->domainName);
-
- ses->auth_key.len = size + 2 * dlen;
- ses->auth_key.response = kzalloc(ses->auth_key.len, GFP_KERNEL);
- if (!ses->auth_key.response) {
- ses->auth_key.len = 0;
- return -ENOMEM;
- }
- blobptr = ses->auth_key.response;
- attrptr = (struct ntlmssp2_name *) blobptr;
-
- attrptr->type = cpu_to_le16(NTLMSSP_AV_NB_DOMAIN_NAME);
- attrptr->length = cpu_to_le16(2 * dlen);
- blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name);
- cifs_strtoUTF16((__le16 *)blobptr, ses->domainName, dlen, nls_cp);
- return 0;
- }
- static int
- find_domain_name(struct cifs_ses *ses, const struct nls_table *nls_cp)
- {
- unsigned int attrsize;
- unsigned int type;
- unsigned int onesize = sizeof(struct ntlmssp2_name);
- unsigned char *blobptr;
- unsigned char *blobend;
- struct ntlmssp2_name *attrptr;
- if (!ses->auth_key.len || !ses->auth_key.response)
- return 0;
- blobptr = ses->auth_key.response;
- blobend = blobptr + ses->auth_key.len;
- while (blobptr + onesize < blobend) {
- attrptr = (struct ntlmssp2_name *) blobptr;
- type = le16_to_cpu(attrptr->type);
- if (type == NTLMSSP_AV_EOL)
- break;
- blobptr += 2;
- attrsize = le16_to_cpu(attrptr->length);
- blobptr += 2;
- if (blobptr + attrsize > blobend)
- break;
- if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
- if (!attrsize || attrsize >= CIFS_MAX_DOMAINNAME_LEN)
- break;
- if (!ses->domainName) {
- ses->domainName =
- kmalloc(attrsize + 1, GFP_KERNEL);
- if (!ses->domainName)
- return -ENOMEM;
- cifs_from_utf16(ses->domainName,
- (__le16 *)blobptr, attrsize, attrsize,
- nls_cp, NO_MAP_UNI_RSVD);
- break;
- }
- }
- blobptr += attrsize;
- }
- return 0;
- }
- static __le64
- find_timestamp(struct cifs_ses *ses)
- {
- unsigned int attrsize;
- unsigned int type;
- unsigned int onesize = sizeof(struct ntlmssp2_name);
- unsigned char *blobptr;
- unsigned char *blobend;
- struct ntlmssp2_name *attrptr;
- if (!ses->auth_key.len || !ses->auth_key.response)
- return 0;
- blobptr = ses->auth_key.response;
- blobend = blobptr + ses->auth_key.len;
- while (blobptr + onesize < blobend) {
- attrptr = (struct ntlmssp2_name *) blobptr;
- type = le16_to_cpu(attrptr->type);
- if (type == NTLMSSP_AV_EOL)
- break;
- blobptr += 2;
- attrsize = le16_to_cpu(attrptr->length);
- blobptr += 2;
- if (blobptr + attrsize > blobend)
- break;
- if (type == NTLMSSP_AV_TIMESTAMP) {
- if (attrsize == sizeof(u64))
- return *((__le64 *)blobptr);
- }
- blobptr += attrsize;
- }
- return cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
- }
- static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash,
- const struct nls_table *nls_cp)
- {
- int rc = 0;
- int len;
- char nt_hash[CIFS_NTHASH_SIZE];
- __le16 *user;
- wchar_t *domain;
- wchar_t *server;
- if (!ses->server->secmech.sdeschmacmd5) {
- cifs_dbg(VFS, "%s: can't generate ntlmv2 hash\n", __func__);
- return -1;
- }
-
- E_md4hash(ses->password, nt_hash, nls_cp);
- rc = crypto_shash_setkey(ses->server->secmech.hmacmd5, nt_hash,
- CIFS_NTHASH_SIZE);
- if (rc) {
- cifs_dbg(VFS, "%s: Could not set NT Hash as a key\n", __func__);
- return rc;
- }
- rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
- if (rc) {
- cifs_dbg(VFS, "%s: could not init hmacmd5\n", __func__);
- return rc;
- }
-
- len = ses->user_name ? strlen(ses->user_name) : 0;
- user = kmalloc(2 + (len * 2), GFP_KERNEL);
- if (user == NULL) {
- rc = -ENOMEM;
- return rc;
- }
- if (len) {
- len = cifs_strtoUTF16(user, ses->user_name, len, nls_cp);
- UniStrupr(user);
- } else {
- memset(user, '\0', 2);
- }
- rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
- (char *)user, 2 * len);
- kfree(user);
- if (rc) {
- cifs_dbg(VFS, "%s: Could not update with user\n", __func__);
- return rc;
- }
-
- if (ses->domainName) {
- len = strlen(ses->domainName);
- domain = kmalloc(2 + (len * 2), GFP_KERNEL);
- if (domain == NULL) {
- rc = -ENOMEM;
- return rc;
- }
- len = cifs_strtoUTF16((__le16 *)domain, ses->domainName, len,
- nls_cp);
- rc =
- crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
- (char *)domain, 2 * len);
- kfree(domain);
- if (rc) {
- cifs_dbg(VFS, "%s: Could not update with domain\n",
- __func__);
- return rc;
- }
- } else {
-
- len = strlen(ses->serverName);
- server = kmalloc(2 + (len * 2), GFP_KERNEL);
- if (server == NULL) {
- rc = -ENOMEM;
- return rc;
- }
- len = cifs_strtoUTF16((__le16 *)server, ses->serverName, len,
- nls_cp);
- rc =
- crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
- (char *)server, 2 * len);
- kfree(server);
- if (rc) {
- cifs_dbg(VFS, "%s: Could not update with server\n",
- __func__);
- return rc;
- }
- }
- rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
- ntlmv2_hash);
- if (rc)
- cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
- return rc;
- }
- static int
- CalcNTLMv2_response(const struct cifs_ses *ses, char *ntlmv2_hash)
- {
- int rc;
- struct ntlmv2_resp *ntlmv2 = (struct ntlmv2_resp *)
- (ses->auth_key.response + CIFS_SESS_KEY_SIZE);
- unsigned int hash_len;
-
- hash_len = ses->auth_key.len - (CIFS_SESS_KEY_SIZE +
- offsetof(struct ntlmv2_resp, challenge.key[0]));
- if (!ses->server->secmech.sdeschmacmd5) {
- cifs_dbg(VFS, "%s: can't generate ntlmv2 hash\n", __func__);
- return -1;
- }
- rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
- ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
- if (rc) {
- cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
- __func__);
- return rc;
- }
- rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
- if (rc) {
- cifs_dbg(VFS, "%s: could not init hmacmd5\n", __func__);
- return rc;
- }
- if (ses->server->negflavor == CIFS_NEGFLAVOR_EXTENDED)
- memcpy(ntlmv2->challenge.key,
- ses->ntlmssp->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
- else
- memcpy(ntlmv2->challenge.key,
- ses->server->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
- rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
- ntlmv2->challenge.key, hash_len);
- if (rc) {
- cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
- return rc;
- }
-
- rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
- ntlmv2->ntlmv2_hash);
- if (rc)
- cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
- return rc;
- }
- static int crypto_hmacmd5_alloc(struct TCP_Server_Info *server)
- {
- int rc;
- unsigned int size;
-
- if (server->secmech.sdeschmacmd5)
- return 0;
- server->secmech.hmacmd5 = crypto_alloc_shash("hmac(md5)", 0, 0);
- if (IS_ERR(server->secmech.hmacmd5)) {
- cifs_dbg(VFS, "could not allocate crypto hmacmd5\n");
- rc = PTR_ERR(server->secmech.hmacmd5);
- server->secmech.hmacmd5 = NULL;
- return rc;
- }
- size = sizeof(struct shash_desc) +
- crypto_shash_descsize(server->secmech.hmacmd5);
- server->secmech.sdeschmacmd5 = kmalloc(size, GFP_KERNEL);
- if (!server->secmech.sdeschmacmd5) {
- crypto_free_shash(server->secmech.hmacmd5);
- server->secmech.hmacmd5 = NULL;
- return -ENOMEM;
- }
- server->secmech.sdeschmacmd5->shash.tfm = server->secmech.hmacmd5;
- server->secmech.sdeschmacmd5->shash.flags = 0x0;
- return 0;
- }
- int
- setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
- {
- int rc;
- int baselen;
- unsigned int tilen;
- struct ntlmv2_resp *ntlmv2;
- char ntlmv2_hash[16];
- unsigned char *tiblob = NULL;
- __le64 rsp_timestamp;
- if (ses->server->negflavor == CIFS_NEGFLAVOR_EXTENDED) {
- if (!ses->domainName) {
- rc = find_domain_name(ses, nls_cp);
- if (rc) {
- cifs_dbg(VFS, "error %d finding domain name\n",
- rc);
- goto setup_ntlmv2_rsp_ret;
- }
- }
- } else {
- rc = build_avpair_blob(ses, nls_cp);
- if (rc) {
- cifs_dbg(VFS, "error %d building av pair blob\n", rc);
- goto setup_ntlmv2_rsp_ret;
- }
- }
-
- rsp_timestamp = find_timestamp(ses);
- baselen = CIFS_SESS_KEY_SIZE + sizeof(struct ntlmv2_resp);
- tilen = ses->auth_key.len;
- tiblob = ses->auth_key.response;
- ses->auth_key.response = kmalloc(baselen + tilen, GFP_KERNEL);
- if (!ses->auth_key.response) {
- rc = -ENOMEM;
- ses->auth_key.len = 0;
- goto setup_ntlmv2_rsp_ret;
- }
- ses->auth_key.len += baselen;
- ntlmv2 = (struct ntlmv2_resp *)
- (ses->auth_key.response + CIFS_SESS_KEY_SIZE);
- ntlmv2->blob_signature = cpu_to_le32(0x00000101);
- ntlmv2->reserved = 0;
- ntlmv2->time = rsp_timestamp;
- get_random_bytes(&ntlmv2->client_chal, sizeof(ntlmv2->client_chal));
- ntlmv2->reserved2 = 0;
- memcpy(ses->auth_key.response + baselen, tiblob, tilen);
- mutex_lock(&ses->server->srv_mutex);
- rc = crypto_hmacmd5_alloc(ses->server);
- if (rc) {
- cifs_dbg(VFS, "could not crypto alloc hmacmd5 rc %d\n", rc);
- goto unlock;
- }
-
- rc = calc_ntlmv2_hash(ses, ntlmv2_hash, nls_cp);
- if (rc) {
- cifs_dbg(VFS, "could not get v2 hash rc %d\n", rc);
- goto unlock;
- }
-
- rc = CalcNTLMv2_response(ses, ntlmv2_hash);
- if (rc) {
- cifs_dbg(VFS, "Could not calculate CR1 rc: %d\n", rc);
- goto unlock;
- }
-
- rc = crypto_shash_setkey(ses->server->secmech.hmacmd5,
- ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
- if (rc) {
- cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
- __func__);
- goto unlock;
- }
- rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
- if (rc) {
- cifs_dbg(VFS, "%s: Could not init hmacmd5\n", __func__);
- goto unlock;
- }
- rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
- ntlmv2->ntlmv2_hash,
- CIFS_HMAC_MD5_HASH_SIZE);
- if (rc) {
- cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
- goto unlock;
- }
- rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
- ses->auth_key.response);
- if (rc)
- cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
- unlock:
- mutex_unlock(&ses->server->srv_mutex);
- setup_ntlmv2_rsp_ret:
- kfree(tiblob);
- return rc;
- }
- int
- calc_seckey(struct cifs_ses *ses)
- {
- int rc;
- struct crypto_skcipher *tfm_arc4;
- struct scatterlist sgin, sgout;
- struct skcipher_request *req;
- unsigned char *sec_key;
- sec_key = kmalloc(CIFS_SESS_KEY_SIZE, GFP_KERNEL);
- if (sec_key == NULL)
- return -ENOMEM;
- get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE);
- tfm_arc4 = crypto_alloc_skcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
- if (IS_ERR(tfm_arc4)) {
- rc = PTR_ERR(tfm_arc4);
- cifs_dbg(VFS, "could not allocate crypto API arc4\n");
- goto out;
- }
- rc = crypto_skcipher_setkey(tfm_arc4, ses->auth_key.response,
- CIFS_SESS_KEY_SIZE);
- if (rc) {
- cifs_dbg(VFS, "%s: Could not set response as a key\n",
- __func__);
- goto out_free_cipher;
- }
- req = skcipher_request_alloc(tfm_arc4, GFP_KERNEL);
- if (!req) {
- rc = -ENOMEM;
- cifs_dbg(VFS, "could not allocate crypto API arc4 request\n");
- goto out_free_cipher;
- }
- sg_init_one(&sgin, sec_key, CIFS_SESS_KEY_SIZE);
- sg_init_one(&sgout, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
- skcipher_request_set_callback(req, 0, NULL, NULL);
- skcipher_request_set_crypt(req, &sgin, &sgout, CIFS_CPHTXT_SIZE, NULL);
- rc = crypto_skcipher_encrypt(req);
- skcipher_request_free(req);
- if (rc) {
- cifs_dbg(VFS, "could not encrypt session key rc: %d\n", rc);
- goto out_free_cipher;
- }
-
- memcpy(ses->auth_key.response, sec_key, CIFS_SESS_KEY_SIZE);
-
- ses->auth_key.len = CIFS_SESS_KEY_SIZE;
- out_free_cipher:
- crypto_free_skcipher(tfm_arc4);
- out:
- kfree(sec_key);
- return rc;
- }
- void
- cifs_crypto_shash_release(struct TCP_Server_Info *server)
- {
- if (server->secmech.cmacaes) {
- crypto_free_shash(server->secmech.cmacaes);
- server->secmech.cmacaes = NULL;
- }
- if (server->secmech.hmacsha256) {
- crypto_free_shash(server->secmech.hmacsha256);
- server->secmech.hmacsha256 = NULL;
- }
- if (server->secmech.md5) {
- crypto_free_shash(server->secmech.md5);
- server->secmech.md5 = NULL;
- }
- if (server->secmech.hmacmd5) {
- crypto_free_shash(server->secmech.hmacmd5);
- server->secmech.hmacmd5 = NULL;
- }
- kfree(server->secmech.sdesccmacaes);
- server->secmech.sdesccmacaes = NULL;
- kfree(server->secmech.sdeschmacsha256);
- server->secmech.sdeschmacsha256 = NULL;
- kfree(server->secmech.sdeschmacmd5);
- server->secmech.sdeschmacmd5 = NULL;
- kfree(server->secmech.sdescmd5);
- server->secmech.sdescmd5 = NULL;
- }
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