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gss_krb5: Remove VLA usage of skcipher 

In the quest to remove all stack VLA usage from the kernel[1], this
replaces struct crypto_skcipher and SKCIPHER_REQUEST_ON_STACK() usage
with struct crypto_sync_skcipher and SYNC_SKCIPHER_REQUEST_ON_STACK(),
which uses a fixed stack size.

[1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com

Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Anna Schumaker <anna.schumaker@netapp.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Jeff Layton <jlayton@kernel.org>
Cc: YueHaibing <yuehaibing@huawei.com>
Cc: linux-nfs@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Kees Cook 2018-09-18 19:10:39 -07:00 committed by Herbert Xu
parent b350bee5ea
commit e9e575b8f2
6 changed files with 108 additions and 109 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
include/linux/sunrpc/gss_krb5.h
View File

@ -71,10 +71,10 @@ struct gss_krb5_enctype {
const u32 keyed_cksum; /* is it a keyed cksum? */
const u32 keybytes; /* raw key len, in bytes */
const u32 keylength; /* final key len, in bytes */
u32 (*encrypt) (struct crypto_skcipher *tfm,
u32 (*encrypt) (struct crypto_sync_skcipher *tfm,
void *iv, void *in, void *out,
int length); /* encryption function */
u32 (*decrypt) (struct crypto_skcipher *tfm,
u32 (*decrypt) (struct crypto_sync_skcipher *tfm,
void *iv, void *in, void *out,
int length); /* decryption function */
u32 (*mk_key) (const struct gss_krb5_enctype *gk5e,
@ -98,12 +98,12 @@ struct krb5_ctx {
u32 enctype;
u32 flags;
const struct gss_krb5_enctype *gk5e; /* enctype-specific info */
struct crypto_skcipher *enc;
struct crypto_skcipher *seq;
struct crypto_skcipher *acceptor_enc;
struct crypto_skcipher *initiator_enc;
struct crypto_skcipher *acceptor_enc_aux;
struct crypto_skcipher *initiator_enc_aux;
struct crypto_sync_skcipher *enc;
struct crypto_sync_skcipher *seq;
struct crypto_sync_skcipher *acceptor_enc;
struct crypto_sync_skcipher *initiator_enc;
struct crypto_sync_skcipher *acceptor_enc_aux;
struct crypto_sync_skcipher *initiator_enc_aux;
u8 Ksess[GSS_KRB5_MAX_KEYLEN]; /* session key */
u8 cksum[GSS_KRB5_MAX_KEYLEN];
s32 endtime;
@ -262,24 +262,24 @@ gss_unwrap_kerberos(struct gss_ctx *ctx_id, int offset,
u32
krb5_encrypt(struct crypto_skcipher *key,
krb5_encrypt(struct crypto_sync_skcipher *key,
void *iv, void *in, void *out, int length);
u32
krb5_decrypt(struct crypto_skcipher *key,
krb5_decrypt(struct crypto_sync_skcipher *key,
void *iv, void *in, void *out, int length);
int
gss_encrypt_xdr_buf(struct crypto_skcipher *tfm, struct xdr_buf *outbuf,
gss_encrypt_xdr_buf(struct crypto_sync_skcipher *tfm, struct xdr_buf *outbuf,
int offset, struct page **pages);
int
gss_decrypt_xdr_buf(struct crypto_skcipher *tfm, struct xdr_buf *inbuf,
gss_decrypt_xdr_buf(struct crypto_sync_skcipher *tfm, struct xdr_buf *inbuf,
int offset);
s32
krb5_make_seq_num(struct krb5_ctx *kctx,
struct crypto_skcipher *key,
struct crypto_sync_skcipher *key,
int direction,
u32 seqnum, unsigned char *cksum, unsigned char *buf);
@ -320,12 +320,12 @@ gss_krb5_aes_decrypt(struct krb5_ctx *kctx, u32 offset,
int
krb5_rc4_setup_seq_key(struct krb5_ctx *kctx,
struct crypto_skcipher *cipher,
struct crypto_sync_skcipher *cipher,
unsigned char *cksum);
int
krb5_rc4_setup_enc_key(struct krb5_ctx *kctx,
struct crypto_skcipher *cipher,
struct crypto_sync_skcipher *cipher,
s32 seqnum);
void
gss_krb5_make_confounder(char *p, u32 conflen);

87
net/sunrpc/auth_gss/gss_krb5_crypto.c
View File

@ -53,7 +53,7 @@
u32
krb5_encrypt(
struct crypto_skcipher *tfm,
struct crypto_sync_skcipher *tfm,
void * iv,
void * in,
void * out,
@ -62,24 +62,24 @@ krb5_encrypt(
u32 ret = -EINVAL;
struct scatterlist sg[1];
u8 local_iv[GSS_KRB5_MAX_BLOCKSIZE] = {0};
SKCIPHER_REQUEST_ON_STACK(req, tfm);
SYNC_SKCIPHER_REQUEST_ON_STACK(req, tfm);
if (length % crypto_skcipher_blocksize(tfm) != 0)
if (length % crypto_sync_skcipher_blocksize(tfm) != 0)
goto out;
if (crypto_skcipher_ivsize(tfm) > GSS_KRB5_MAX_BLOCKSIZE) {
if (crypto_sync_skcipher_ivsize(tfm) > GSS_KRB5_MAX_BLOCKSIZE) {
dprintk("RPC: gss_k5encrypt: tfm iv size too large %d\n",
crypto_skcipher_ivsize(tfm));
crypto_sync_skcipher_ivsize(tfm));
goto out;
}
if (iv)
memcpy(local_iv, iv, crypto_skcipher_ivsize(tfm));
memcpy(local_iv, iv, crypto_sync_skcipher_ivsize(tfm));
memcpy(out, in, length);
sg_init_one(sg, out, length);
skcipher_request_set_tfm(req, tfm);
skcipher_request_set_sync_tfm(req, tfm);
skcipher_request_set_callback(req, 0, NULL, NULL);
skcipher_request_set_crypt(req, sg, sg, length, local_iv);
@ -92,7 +92,7 @@ out:
u32
krb5_decrypt(
struct crypto_skcipher *tfm,
struct crypto_sync_skcipher *tfm,
void * iv,
void * in,
void * out,
@ -101,23 +101,23 @@ krb5_decrypt(
u32 ret = -EINVAL;
struct scatterlist sg[1];
u8 local_iv[GSS_KRB5_MAX_BLOCKSIZE] = {0};
SKCIPHER_REQUEST_ON_STACK(req, tfm);
SYNC_SKCIPHER_REQUEST_ON_STACK(req, tfm);
if (length % crypto_skcipher_blocksize(tfm) != 0)
if (length % crypto_sync_skcipher_blocksize(tfm) != 0)
goto out;
if (crypto_skcipher_ivsize(tfm) > GSS_KRB5_MAX_BLOCKSIZE) {
if (crypto_sync_skcipher_ivsize(tfm) > GSS_KRB5_MAX_BLOCKSIZE) {
dprintk("RPC: gss_k5decrypt: tfm iv size too large %d\n",
crypto_skcipher_ivsize(tfm));
crypto_sync_skcipher_ivsize(tfm));
goto out;
}
if (iv)
memcpy(local_iv,iv, crypto_skcipher_ivsize(tfm));
memcpy(local_iv, iv, crypto_sync_skcipher_ivsize(tfm));
memcpy(out, in, length);
sg_init_one(sg, out, length);
skcipher_request_set_tfm(req, tfm);
skcipher_request_set_sync_tfm(req, tfm);
skcipher_request_set_callback(req, 0, NULL, NULL);
skcipher_request_set_crypt(req, sg, sg, length, local_iv);
@ -466,7 +466,8 @@ encryptor(struct scatterlist *sg, void *data)
{
struct encryptor_desc *desc = data;
struct xdr_buf *outbuf = desc->outbuf;
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(desc->req);
struct crypto_sync_skcipher *tfm =
crypto_sync_skcipher_reqtfm(desc->req);
struct page *in_page;
int thislen = desc->fraglen + sg->length;
int fraglen, ret;
@ -492,7 +493,7 @@ encryptor(struct scatterlist *sg, void *data)
desc->fraglen += sg->length;
desc->pos += sg->length;
fraglen = thislen & (crypto_skcipher_blocksize(tfm) - 1);
fraglen = thislen & (crypto_sync_skcipher_blocksize(tfm) - 1);
thislen -= fraglen;
if (thislen == 0)
@ -526,16 +527,16 @@ encryptor(struct scatterlist *sg, void *data)
}
int
gss_encrypt_xdr_buf(struct crypto_skcipher *tfm, struct xdr_buf *buf,
gss_encrypt_xdr_buf(struct crypto_sync_skcipher *tfm, struct xdr_buf *buf,
int offset, struct page **pages)
{
int ret;
struct encryptor_desc desc;
SKCIPHER_REQUEST_ON_STACK(req, tfm);
SYNC_SKCIPHER_REQUEST_ON_STACK(req, tfm);
BUG_ON((buf->len - offset) % crypto_skcipher_blocksize(tfm) != 0);
BUG_ON((buf->len - offset) % crypto_sync_skcipher_blocksize(tfm) != 0);
skcipher_request_set_tfm(req, tfm);
skcipher_request_set_sync_tfm(req, tfm);
skcipher_request_set_callback(req, 0, NULL, NULL);
memset(desc.iv, 0, sizeof(desc.iv));
@ -567,7 +568,8 @@ decryptor(struct scatterlist *sg, void *data)
{
struct decryptor_desc *desc = data;
int thislen = desc->fraglen + sg->length;
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(desc->req);
struct crypto_sync_skcipher *tfm =
crypto_sync_skcipher_reqtfm(desc->req);
int fraglen, ret;
/* Worst case is 4 fragments: head, end of page 1, start
@ -578,7 +580,7 @@ decryptor(struct scatterlist *sg, void *data)
desc->fragno++;
desc->fraglen += sg->length;
fraglen = thislen & (crypto_skcipher_blocksize(tfm) - 1);
fraglen = thislen & (crypto_sync_skcipher_blocksize(tfm) - 1);
thislen -= fraglen;
if (thislen == 0)
@ -608,17 +610,17 @@ decryptor(struct scatterlist *sg, void *data)
}
int
gss_decrypt_xdr_buf(struct crypto_skcipher *tfm, struct xdr_buf *buf,
gss_decrypt_xdr_buf(struct crypto_sync_skcipher *tfm, struct xdr_buf *buf,
int offset)
{
int ret;
struct decryptor_desc desc;
SKCIPHER_REQUEST_ON_STACK(req, tfm);
SYNC_SKCIPHER_REQUEST_ON_STACK(req, tfm);
/* XXXJBF: */
BUG_ON((buf->len - offset) % crypto_skcipher_blocksize(tfm) != 0);
BUG_ON((buf->len - offset) % crypto_sync_skcipher_blocksize(tfm) != 0);
skcipher_request_set_tfm(req, tfm);
skcipher_request_set_sync_tfm(req, tfm);
skcipher_request_set_callback(req, 0, NULL, NULL);
memset(desc.iv, 0, sizeof(desc.iv));
@ -672,12 +674,12 @@ xdr_extend_head(struct xdr_buf *buf, unsigned int base, unsigned int shiftlen)
}
static u32
gss_krb5_cts_crypt(struct crypto_skcipher *cipher, struct xdr_buf *buf,
gss_krb5_cts_crypt(struct crypto_sync_skcipher *cipher, struct xdr_buf *buf,
u32 offset, u8 *iv, struct page **pages, int encrypt)
{
u32 ret;
struct scatterlist sg[1];
SKCIPHER_REQUEST_ON_STACK(req, cipher);
SYNC_SKCIPHER_REQUEST_ON_STACK(req, cipher);
u8 *data;
struct page **save_pages;
u32 len = buf->len - offset;
@ -706,7 +708,7 @@ gss_krb5_cts_crypt(struct crypto_skcipher *cipher, struct xdr_buf *buf,
sg_init_one(sg, data, len);
skcipher_request_set_tfm(req, cipher);
skcipher_request_set_sync_tfm(req, cipher);
skcipher_request_set_callback(req, 0, NULL, NULL);
skcipher_request_set_crypt(req, sg, sg, len, iv);
@ -735,7 +737,7 @@ gss_krb5_aes_encrypt(struct krb5_ctx *kctx, u32 offset,
struct xdr_netobj hmac;
u8 *cksumkey;
u8 *ecptr;
struct crypto_skcipher *cipher, *aux_cipher;
struct crypto_sync_skcipher *cipher, *aux_cipher;
int blocksize;
struct page **save_pages;
int nblocks, nbytes;
@ -754,7 +756,7 @@ gss_krb5_aes_encrypt(struct krb5_ctx *kctx, u32 offset,
cksumkey = kctx->acceptor_integ;
usage = KG_USAGE_ACCEPTOR_SEAL;
}
blocksize = crypto_skcipher_blocksize(cipher);
blocksize = crypto_sync_skcipher_blocksize(cipher);
/* hide the gss token header and insert the confounder */
offset += GSS_KRB5_TOK_HDR_LEN;
@ -807,7 +809,7 @@ gss_krb5_aes_encrypt(struct krb5_ctx *kctx, u32 offset,
memset(desc.iv, 0, sizeof(desc.iv));
if (cbcbytes) {
SKCIPHER_REQUEST_ON_STACK(req, aux_cipher);
SYNC_SKCIPHER_REQUEST_ON_STACK(req, aux_cipher);
desc.pos = offset + GSS_KRB5_TOK_HDR_LEN;
desc.fragno = 0;
@ -816,7 +818,7 @@ gss_krb5_aes_encrypt(struct krb5_ctx *kctx, u32 offset,
desc.outbuf = buf;
desc.req = req;
skcipher_request_set_tfm(req, aux_cipher);
skcipher_request_set_sync_tfm(req, aux_cipher);
skcipher_request_set_callback(req, 0, NULL, NULL);
sg_init_table(desc.infrags, 4);
@ -855,7 +857,7 @@ gss_krb5_aes_decrypt(struct krb5_ctx *kctx, u32 offset, struct xdr_buf *buf,
struct xdr_buf subbuf;
u32 ret = 0;
u8 *cksum_key;
struct crypto_skcipher *cipher, *aux_cipher;
struct crypto_sync_skcipher *cipher, *aux_cipher;
struct xdr_netobj our_hmac_obj;
u8 our_hmac[GSS_KRB5_MAX_CKSUM_LEN];
u8 pkt_hmac[GSS_KRB5_MAX_CKSUM_LEN];
@ -874,7 +876,7 @@ gss_krb5_aes_decrypt(struct krb5_ctx *kctx, u32 offset, struct xdr_buf *buf,
cksum_key = kctx->initiator_integ;
usage = KG_USAGE_INITIATOR_SEAL;
}
blocksize = crypto_skcipher_blocksize(cipher);
blocksize = crypto_sync_skcipher_blocksize(cipher);
/* create a segment skipping the header and leaving out the checksum */
@ -891,13 +893,13 @@ gss_krb5_aes_decrypt(struct krb5_ctx *kctx, u32 offset, struct xdr_buf *buf,
memset(desc.iv, 0, sizeof(desc.iv));
if (cbcbytes) {
SKCIPHER_REQUEST_ON_STACK(req, aux_cipher);
SYNC_SKCIPHER_REQUEST_ON_STACK(req, aux_cipher);
desc.fragno = 0;
desc.fraglen = 0;
desc.req = req;
skcipher_request_set_tfm(req, aux_cipher);
skcipher_request_set_sync_tfm(req, aux_cipher);
skcipher_request_set_callback(req, 0, NULL, NULL);
sg_init_table(desc.frags, 4);
@ -946,7 +948,8 @@ out_err:
* Set the key of the given cipher.
*/
int
krb5_rc4_setup_seq_key(struct krb5_ctx *kctx, struct crypto_skcipher *cipher,
krb5_rc4_setup_seq_key(struct krb5_ctx *kctx,
struct crypto_sync_skcipher *cipher,
unsigned char *cksum)
{
struct crypto_shash *hmac;
@ -994,7 +997,7 @@ krb5_rc4_setup_seq_key(struct krb5_ctx *kctx, struct crypto_skcipher *cipher,
if (err)
goto out_err;
err = crypto_skcipher_setkey(cipher, Kseq, kctx->gk5e->keylength);
err = crypto_sync_skcipher_setkey(cipher, Kseq, kctx->gk5e->keylength);
if (err)
goto out_err;
@ -1012,7 +1015,8 @@ out_err:
* Set the key of cipher kctx->enc.
*/
int
krb5_rc4_setup_enc_key(struct krb5_ctx *kctx, struct crypto_skcipher *cipher,
krb5_rc4_setup_enc_key(struct krb5_ctx *kctx,
struct crypto_sync_skcipher *cipher,
s32 seqnum)
{
struct crypto_shash *hmac;
@ -1069,7 +1073,8 @@ krb5_rc4_setup_enc_key(struct krb5_ctx *kctx, struct crypto_skcipher *cipher,
if (err)
goto out_err;
err = crypto_skcipher_setkey(cipher, Kcrypt, kctx->gk5e->keylength);
err = crypto_sync_skcipher_setkey(cipher, Kcrypt,
kctx->gk5e->keylength);
if (err)
goto out_err;

9
net/sunrpc/auth_gss/gss_krb5_keys.c
View File

@ -147,7 +147,7 @@ u32 krb5_derive_key(const struct gss_krb5_enctype *gk5e,
size_t blocksize, keybytes, keylength, n;
unsigned char *inblockdata, *outblockdata, *rawkey;
struct xdr_netobj inblock, outblock;
struct crypto_skcipher *cipher;
struct crypto_sync_skcipher *cipher;
u32 ret = EINVAL;
blocksize = gk5e->blocksize;
@ -157,11 +157,10 @@ u32 krb5_derive_key(const struct gss_krb5_enctype *gk5e,
if ((inkey->len != keylength) || (outkey->len != keylength))
goto err_return;
cipher = crypto_alloc_skcipher(gk5e->encrypt_name, 0,
CRYPTO_ALG_ASYNC);
cipher = crypto_alloc_sync_skcipher(gk5e->encrypt_name, 0, 0);
if (IS_ERR(cipher))
goto err_return;
if (crypto_skcipher_setkey(cipher, inkey->data, inkey->len))
if (crypto_sync_skcipher_setkey(cipher, inkey->data, inkey->len))
goto err_return;
/* allocate and set up buffers */
@ -238,7 +237,7 @@ err_free_in:
memset(inblockdata, 0, blocksize);
kfree(inblockdata);
err_free_cipher:
crypto_free_skcipher(cipher);
crypto_free_sync_skcipher(cipher);
err_return:
return ret;
}

53
net/sunrpc/auth_gss/gss_krb5_mech.c
View File

@ -218,7 +218,7 @@ simple_get_netobj(const void *p, const void *end, struct xdr_netobj *res)
static inline const void *
get_key(const void *p, const void *end,
struct krb5_ctx *ctx, struct crypto_skcipher **res)
struct krb5_ctx *ctx, struct crypto_sync_skcipher **res)
{
struct xdr_netobj key;
int alg;
@ -246,15 +246,14 @@ get_key(const void *p, const void *end,
if (IS_ERR(p))
goto out_err;
*res = crypto_alloc_skcipher(ctx->gk5e->encrypt_name, 0,
CRYPTO_ALG_ASYNC);
*res = crypto_alloc_sync_skcipher(ctx->gk5e->encrypt_name, 0, 0);
if (IS_ERR(*res)) {
printk(KERN_WARNING "gss_kerberos_mech: unable to initialize "
"crypto algorithm %s\n", ctx->gk5e->encrypt_name);
*res = NULL;
goto out_err_free_key;
}
if (crypto_skcipher_setkey(*res, key.data, key.len)) {
if (crypto_sync_skcipher_setkey(*res, key.data, key.len)) {
printk(KERN_WARNING "gss_kerberos_mech: error setting key for "
"crypto algorithm %s\n", ctx->gk5e->encrypt_name);
goto out_err_free_tfm;
@ -264,7 +263,7 @@ get_key(const void *p, const void *end,
return p;
out_err_free_tfm:
crypto_free_skcipher(*res);
crypto_free_sync_skcipher(*res);
out_err_free_key:
kfree(key.data);
p = ERR_PTR(-EINVAL);
@ -336,30 +335,30 @@ gss_import_v1_context(const void *p, const void *end, struct krb5_ctx *ctx)
return 0;
out_err_free_key2:
crypto_free_skcipher(ctx->seq);
crypto_free_sync_skcipher(ctx->seq);
out_err_free_key1:
crypto_free_skcipher(ctx->enc);
crypto_free_sync_skcipher(ctx->enc);
out_err_free_mech:
kfree(ctx->mech_used.data);
out_err:
return PTR_ERR(p);
}
static struct crypto_skcipher *
static struct crypto_sync_skcipher *
context_v2_alloc_cipher(struct krb5_ctx *ctx, const char *cname, u8 *key)
{
struct crypto_skcipher *cp;
struct crypto_sync_skcipher *cp;
cp = crypto_alloc_skcipher(cname, 0, CRYPTO_ALG_ASYNC);
cp = crypto_alloc_sync_skcipher(cname, 0, 0);
if (IS_ERR(cp)) {
dprintk("gss_kerberos_mech: unable to initialize "
"crypto algorithm %s\n", cname);
return NULL;
}
if (crypto_skcipher_setkey(cp, key, ctx->gk5e->keylength)) {
if (crypto_sync_skcipher_setkey(cp, key, ctx->gk5e->keylength)) {
dprintk("gss_kerberos_mech: error setting key for "
"crypto algorithm %s\n", cname);
crypto_free_skcipher(cp);
crypto_free_sync_skcipher(cp);
return NULL;
}
return cp;
@ -413,9 +412,9 @@ context_derive_keys_des3(struct krb5_ctx *ctx, gfp_t gfp_mask)
return 0;
out_free_enc:
crypto_free_skcipher(ctx->enc);
crypto_free_sync_skcipher(ctx->enc);
out_free_seq:
crypto_free_skcipher(ctx->seq);
crypto_free_sync_skcipher(ctx->seq);
out_err:
return -EINVAL;
}
@ -469,17 +468,15 @@ context_derive_keys_rc4(struct krb5_ctx *ctx)
/*
* allocate hash, and skciphers for data and seqnum encryption
*/
ctx->enc = crypto_alloc_skcipher(ctx->gk5e->encrypt_name, 0,
CRYPTO_ALG_ASYNC);
ctx->enc = crypto_alloc_sync_skcipher(ctx->gk5e->encrypt_name, 0, 0);
if (IS_ERR(ctx->enc)) {
err = PTR_ERR(ctx->enc);
goto out_err_free_hmac;
}
ctx->seq = crypto_alloc_skcipher(ctx->gk5e->encrypt_name, 0,
CRYPTO_ALG_ASYNC);
ctx->seq = crypto_alloc_sync_skcipher(ctx->gk5e->encrypt_name, 0, 0);
if (IS_ERR(ctx->seq)) {
crypto_free_skcipher(ctx->enc);
crypto_free_sync_skcipher(ctx->enc);
err = PTR_ERR(ctx->seq);
goto out_err_free_hmac;
}
@ -591,7 +588,7 @@ context_derive_keys_new(struct krb5_ctx *ctx, gfp_t gfp_mask)
context_v2_alloc_cipher(ctx, "cbc(aes)",
ctx->acceptor_seal);
if (ctx->acceptor_enc_aux == NULL) {
crypto_free_skcipher(ctx->initiator_enc_aux);
crypto_free_sync_skcipher(ctx->initiator_enc_aux);
goto out_free_acceptor_enc;
}
}
@ -599,9 +596,9 @@ context_derive_keys_new(struct krb5_ctx *ctx, gfp_t gfp_mask)
return 0;
out_free_acceptor_enc:
crypto_free_skcipher(ctx->acceptor_enc);
crypto_free_sync_skcipher(ctx->acceptor_enc);
out_free_initiator_enc:
crypto_free_skcipher(ctx->initiator_enc);
crypto_free_sync_skcipher(ctx->initiator_enc);
out_err:
return -EINVAL;
}
@ -713,12 +710,12 @@ static void
gss_delete_sec_context_kerberos(void *internal_ctx) {
struct krb5_ctx *kctx = internal_ctx;
crypto_free_skcipher(kctx->seq);
crypto_free_skcipher(kctx->enc);
crypto_free_skcipher(kctx->acceptor_enc);
crypto_free_skcipher(kctx->initiator_enc);
crypto_free_skcipher(kctx->acceptor_enc_aux);
crypto_free_skcipher(kctx->initiator_enc_aux);
crypto_free_sync_skcipher(kctx->seq);
crypto_free_sync_skcipher(kctx->enc);
crypto_free_sync_skcipher(kctx->acceptor_enc);
crypto_free_sync_skcipher(kctx->initiator_enc);
crypto_free_sync_skcipher(kctx->acceptor_enc_aux);
crypto_free_sync_skcipher(kctx->initiator_enc_aux);
kfree(kctx->mech_used.data);
kfree(kctx);
}

18
net/sunrpc/auth_gss/gss_krb5_seqnum.c
View File

@ -43,13 +43,12 @@ static s32
krb5_make_rc4_seq_num(struct krb5_ctx *kctx, int direction, s32 seqnum,
unsigned char *cksum, unsigned char *buf)
{
struct crypto_skcipher *cipher;
struct crypto_sync_skcipher *cipher;
unsigned char plain[8];
s32 code;
dprintk("RPC: %s:\n", __func__);
cipher = crypto_alloc_skcipher(kctx->gk5e->encrypt_name, 0,
CRYPTO_ALG_ASYNC);
cipher = crypto_alloc_sync_skcipher(kctx->gk5e->encrypt_name, 0, 0);
if (IS_ERR(cipher))
return PTR_ERR(cipher);
@ -68,12 +67,12 @@ krb5_make_rc4_seq_num(struct krb5_ctx *kctx, int direction, s32 seqnum,
code = krb5_encrypt(cipher, cksum, plain, buf, 8);
out:
crypto_free_skcipher(cipher);
crypto_free_sync_skcipher(cipher);
return code;
}
s32
krb5_make_seq_num(struct krb5_ctx *kctx,
struct crypto_skcipher *key,
struct crypto_sync_skcipher *key,
int direction,
u32 seqnum,
unsigned char *cksum, unsigned char *buf)
@ -101,13 +100,12 @@ static s32
krb5_get_rc4_seq_num(struct krb5_ctx *kctx, unsigned char *cksum,
unsigned char *buf, int *direction, s32 *seqnum)
{
struct crypto_skcipher *cipher;
struct crypto_sync_skcipher *cipher;
unsigned char plain[8];
s32 code;
dprintk("RPC: %s:\n", __func__);
cipher = crypto_alloc_skcipher(kctx->gk5e->encrypt_name, 0,
CRYPTO_ALG_ASYNC);
cipher = crypto_alloc_sync_skcipher(kctx->gk5e->encrypt_name, 0, 0);
if (IS_ERR(cipher))
return PTR_ERR(cipher);
@ -130,7 +128,7 @@ krb5_get_rc4_seq_num(struct krb5_ctx *kctx, unsigned char *cksum,
*seqnum = ((plain[0] << 24) | (plain[1] << 16) |
(plain[2] << 8) | (plain[3]));
out:
crypto_free_skcipher(cipher);
crypto_free_sync_skcipher(cipher);
return code;
}
@ -142,7 +140,7 @@ krb5_get_seq_num(struct krb5_ctx *kctx,
{
s32 code;
unsigned char plain[8];
struct crypto_skcipher *key = kctx->seq;
struct crypto_sync_skcipher *key = kctx->seq;
dprintk("RPC: krb5_get_seq_num:\n");

20
net/sunrpc/auth_gss/gss_krb5_wrap.c
View File

@ -174,7 +174,7 @@ gss_wrap_kerberos_v1(struct krb5_ctx *kctx, int offset,
now = get_seconds();
blocksize = crypto_skcipher_blocksize(kctx->enc);
blocksize = crypto_sync_skcipher_blocksize(kctx->enc);
gss_krb5_add_padding(buf, offset, blocksize);
BUG_ON((buf->len - offset) % blocksize);
plainlen = conflen + buf->len - offset;
@ -239,10 +239,10 @@ gss_wrap_kerberos_v1(struct krb5_ctx *kctx, int offset,
return GSS_S_FAILURE;
if (kctx->enctype == ENCTYPE_ARCFOUR_HMAC) {
struct crypto_skcipher *cipher;
struct crypto_sync_skcipher *cipher;
int err;
cipher = crypto_alloc_skcipher(kctx->gk5e->encrypt_name, 0,
CRYPTO_ALG_ASYNC);
cipher = crypto_alloc_sync_skcipher(kctx->gk5e->encrypt_name,
0, 0);
if (IS_ERR(cipher))
return GSS_S_FAILURE;
@ -250,7 +250,7 @@ gss_wrap_kerberos_v1(struct krb5_ctx *kctx, int offset,
err = gss_encrypt_xdr_buf(cipher, buf,
offset + headlen - conflen, pages);
crypto_free_skcipher(cipher);
crypto_free_sync_skcipher(cipher);
if (err)
return GSS_S_FAILURE;
} else {
@ -327,18 +327,18 @@ gss_unwrap_kerberos_v1(struct krb5_ctx *kctx, int offset, struct xdr_buf *buf)
return GSS_S_BAD_SIG;
if (kctx->enctype == ENCTYPE_ARCFOUR_HMAC) {
struct crypto_skcipher *cipher;
struct crypto_sync_skcipher *cipher;
int err;
cipher = crypto_alloc_skcipher(kctx->gk5e->encrypt_name, 0,
CRYPTO_ALG_ASYNC);
cipher = crypto_alloc_sync_skcipher(kctx->gk5e->encrypt_name,
0, 0);
if (IS_ERR(cipher))
return GSS_S_FAILURE;
krb5_rc4_setup_enc_key(kctx, cipher, seqnum);
err = gss_decrypt_xdr_buf(cipher, buf, crypt_offset);
crypto_free_skcipher(cipher);
crypto_free_sync_skcipher(cipher);
if (err)
return GSS_S_DEFECTIVE_TOKEN;
} else {
@ -371,7 +371,7 @@ gss_unwrap_kerberos_v1(struct krb5_ctx *kctx, int offset, struct xdr_buf *buf)
/* Copy the data back to the right position. XXX: Would probably be
* better to copy and encrypt at the same time. */
blocksize = crypto_skcipher_blocksize(kctx->enc);
blocksize = crypto_sync_skcipher_blocksize(kctx->enc);
data_start = ptr + (GSS_KRB5_TOK_HDR_LEN + kctx->gk5e->cksumlength) +
conflen;
orig_start = buf->head[0].iov_base + offset;