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path: root/drivers/net/ppp_mppe.c
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Diffstat (limited to 'drivers/net/ppp_mppe.c')
-rw-r--r--drivers/net/ppp_mppe.c68
1 files changed, 42 insertions, 26 deletions
diff --git a/drivers/net/ppp_mppe.c b/drivers/net/ppp_mppe.c
index 51ff9a9d1bb..f3655fd772f 100644
--- a/drivers/net/ppp_mppe.c
+++ b/drivers/net/ppp_mppe.c
@@ -43,6 +43,7 @@
* deprecated in 2.6
*/
+#include <linux/err.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/version.h>
@@ -64,12 +65,13 @@ MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS("ppp-compress-" __stringify(CI_MPPE));
MODULE_VERSION("1.0.2");
-static void
+static unsigned int
setup_sg(struct scatterlist *sg, const void *address, unsigned int length)
{
sg[0].page = virt_to_page(address);
sg[0].offset = offset_in_page(address);
sg[0].length = length;
+ return length;
}
#define SHA1_PAD_SIZE 40
@@ -95,8 +97,8 @@ static inline void sha_pad_init(struct sha_pad *shapad)
* State for an MPPE (de)compressor.
*/
struct ppp_mppe_state {
- struct crypto_tfm *arc4;
- struct crypto_tfm *sha1;
+ struct crypto_blkcipher *arc4;
+ struct crypto_hash *sha1;
unsigned char *sha1_digest;
unsigned char master_key[MPPE_MAX_KEY_LEN];
unsigned char session_key[MPPE_MAX_KEY_LEN];
@@ -136,14 +138,21 @@ struct ppp_mppe_state {
*/
static void get_new_key_from_sha(struct ppp_mppe_state * state, unsigned char *InterimKey)
{
+ struct hash_desc desc;
struct scatterlist sg[4];
+ unsigned int nbytes;
- setup_sg(&sg[0], state->master_key, state->keylen);
- setup_sg(&sg[1], sha_pad->sha_pad1, sizeof(sha_pad->sha_pad1));
- setup_sg(&sg[2], state->session_key, state->keylen);
- setup_sg(&sg[3], sha_pad->sha_pad2, sizeof(sha_pad->sha_pad2));
+ nbytes = setup_sg(&sg[0], state->master_key, state->keylen);
+ nbytes += setup_sg(&sg[1], sha_pad->sha_pad1,
+ sizeof(sha_pad->sha_pad1));
+ nbytes += setup_sg(&sg[2], state->session_key, state->keylen);
+ nbytes += setup_sg(&sg[3], sha_pad->sha_pad2,
+ sizeof(sha_pad->sha_pad2));
- crypto_digest_digest (state->sha1, sg, 4, state->sha1_digest);
+ desc.tfm = state->sha1;
+ desc.flags = 0;
+
+ crypto_hash_digest(&desc, sg, nbytes, state->sha1_digest);
memcpy(InterimKey, state->sha1_digest, state->keylen);
}
@@ -156,14 +165,15 @@ static void mppe_rekey(struct ppp_mppe_state * state, int initial_key)
{
unsigned char InterimKey[MPPE_MAX_KEY_LEN];
struct scatterlist sg_in[1], sg_out[1];
+ struct blkcipher_desc desc = { .tfm = state->arc4 };
get_new_key_from_sha(state, InterimKey);
if (!initial_key) {
- crypto_cipher_setkey(state->arc4, InterimKey, state->keylen);
+ crypto_blkcipher_setkey(state->arc4, InterimKey, state->keylen);
setup_sg(sg_in, InterimKey, state->keylen);
setup_sg(sg_out, state->session_key, state->keylen);
- if (crypto_cipher_encrypt(state->arc4, sg_out, sg_in,
- state->keylen) != 0) {
+ if (crypto_blkcipher_encrypt(&desc, sg_out, sg_in,
+ state->keylen) != 0) {
printk(KERN_WARNING "mppe_rekey: cipher_encrypt failed\n");
}
} else {
@@ -175,7 +185,7 @@ static void mppe_rekey(struct ppp_mppe_state * state, int initial_key)
state->session_key[1] = 0x26;
state->session_key[2] = 0x9e;
}
- crypto_cipher_setkey(state->arc4, state->session_key, state->keylen);
+ crypto_blkcipher_setkey(state->arc4, state->session_key, state->keylen);
}
/*
@@ -196,15 +206,19 @@ static void *mppe_alloc(unsigned char *options, int optlen)
memset(state, 0, sizeof(*state));
- state->arc4 = crypto_alloc_tfm("arc4", 0);
- if (!state->arc4)
+ state->arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(state->arc4)) {
+ state->arc4 = NULL;
goto out_free;
+ }
- state->sha1 = crypto_alloc_tfm("sha1", 0);
- if (!state->sha1)
+ state->sha1 = crypto_alloc_hash("sha1", 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(state->sha1)) {
+ state->sha1 = NULL;
goto out_free;
+ }
- digestsize = crypto_tfm_alg_digestsize(state->sha1);
+ digestsize = crypto_hash_digestsize(state->sha1);
if (digestsize < MPPE_MAX_KEY_LEN)
goto out_free;
@@ -229,9 +243,9 @@ static void *mppe_alloc(unsigned char *options, int optlen)
if (state->sha1_digest)
kfree(state->sha1_digest);
if (state->sha1)
- crypto_free_tfm(state->sha1);
+ crypto_free_hash(state->sha1);
if (state->arc4)
- crypto_free_tfm(state->arc4);
+ crypto_free_blkcipher(state->arc4);
kfree(state);
out:
return NULL;
@@ -247,9 +261,9 @@ static void mppe_free(void *arg)
if (state->sha1_digest)
kfree(state->sha1_digest);
if (state->sha1)
- crypto_free_tfm(state->sha1);
+ crypto_free_hash(state->sha1);
if (state->arc4)
- crypto_free_tfm(state->arc4);
+ crypto_free_blkcipher(state->arc4);
kfree(state);
}
}
@@ -356,6 +370,7 @@ mppe_compress(void *arg, unsigned char *ibuf, unsigned char *obuf,
int isize, int osize)
{
struct ppp_mppe_state *state = (struct ppp_mppe_state *) arg;
+ struct blkcipher_desc desc = { .tfm = state->arc4 };
int proto;
struct scatterlist sg_in[1], sg_out[1];
@@ -413,7 +428,7 @@ mppe_compress(void *arg, unsigned char *ibuf, unsigned char *obuf,
/* Encrypt packet */
setup_sg(sg_in, ibuf, isize);
setup_sg(sg_out, obuf, osize);
- if (crypto_cipher_encrypt(state->arc4, sg_out, sg_in, isize) != 0) {
+ if (crypto_blkcipher_encrypt(&desc, sg_out, sg_in, isize) != 0) {
printk(KERN_DEBUG "crypto_cypher_encrypt failed\n");
return -1;
}
@@ -462,6 +477,7 @@ mppe_decompress(void *arg, unsigned char *ibuf, int isize, unsigned char *obuf,
int osize)
{
struct ppp_mppe_state *state = (struct ppp_mppe_state *) arg;
+ struct blkcipher_desc desc = { .tfm = state->arc4 };
unsigned ccount;
int flushed = MPPE_BITS(ibuf) & MPPE_BIT_FLUSHED;
int sanity = 0;
@@ -599,7 +615,7 @@ mppe_decompress(void *arg, unsigned char *ibuf, int isize, unsigned char *obuf,
*/
setup_sg(sg_in, ibuf, 1);
setup_sg(sg_out, obuf, 1);
- if (crypto_cipher_decrypt(state->arc4, sg_out, sg_in, 1) != 0) {
+ if (crypto_blkcipher_decrypt(&desc, sg_out, sg_in, 1) != 0) {
printk(KERN_DEBUG "crypto_cypher_decrypt failed\n");
return DECOMP_ERROR;
}
@@ -619,7 +635,7 @@ mppe_decompress(void *arg, unsigned char *ibuf, int isize, unsigned char *obuf,
/* And finally, decrypt the rest of the packet. */
setup_sg(sg_in, ibuf + 1, isize - 1);
setup_sg(sg_out, obuf + 1, osize - 1);
- if (crypto_cipher_decrypt(state->arc4, sg_out, sg_in, isize - 1) != 0) {
+ if (crypto_blkcipher_decrypt(&desc, sg_out, sg_in, isize - 1)) {
printk(KERN_DEBUG "crypto_cypher_decrypt failed\n");
return DECOMP_ERROR;
}
@@ -694,8 +710,8 @@ static struct compressor ppp_mppe = {
static int __init ppp_mppe_init(void)
{
int answer;
- if (!(crypto_alg_available("arc4", 0) &&
- crypto_alg_available("sha1", 0)))
+ if (!(crypto_has_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC) &&
+ crypto_has_hash("sha1", 0, CRYPTO_ALG_ASYNC)))
return -ENODEV;
sha_pad = kmalloc(sizeof(struct sha_pad), GFP_KERNEL);
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-26 20:00:47 +0000