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libceph: Use skcipher

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This patch replaces uses of blkcipher with skcipher.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2016-01-24 21:18:40 +08:00
parent 71af2f6bb2
commit e59dd982d3
1 changed files with 56 additions and 41 deletions
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97
net/ceph/crypto.c
View file

@ -4,7 +4,8 @@
#include <linux/err.h> #include <linux/err.h>
#include <linux/scatterlist.h> #include <linux/scatterlist.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <crypto/hash.h> #include <crypto/aes.h>
#include <crypto/skcipher.h>
#include <linux/key-type.h> #include <linux/key-type.h>
#include <keys/ceph-type.h> #include <keys/ceph-type.h>
@ -79,9 +80,9 @@ int ceph_crypto_key_unarmor(struct ceph_crypto_key *key, const char *inkey)
return 0; return 0;
} }
static struct crypto_blkcipher *ceph_crypto_alloc_cipher(void) static struct crypto_skcipher *ceph_crypto_alloc_cipher(void)
{ {
return crypto_alloc_blkcipher("cbc(aes)", 0, CRYPTO_ALG_ASYNC); return crypto_alloc_skcipher("cbc(aes)", 0, CRYPTO_ALG_ASYNC);
} }
static const u8 *aes_iv = (u8 *)CEPH_AES_IV; static const u8 *aes_iv = (u8 *)CEPH_AES_IV;
@ -162,11 +163,11 @@ static int ceph_aes_encrypt(const void *key, int key_len,
{ {
struct scatterlist sg_in[2], prealloc_sg; struct scatterlist sg_in[2], prealloc_sg;
struct sg_table sg_out; struct sg_table sg_out;
struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher(); struct crypto_skcipher *tfm = ceph_crypto_alloc_cipher();
struct blkcipher_desc desc = { .tfm = tfm, .flags = 0 }; SKCIPHER_REQUEST_ON_STACK(req, tfm);
int ret; int ret;
void *iv; int ivsize = AES_BLOCK_SIZE;
int ivsize; char iv[ivsize];
size_t zero_padding = (0x10 - (src_len & 0x0f)); size_t zero_padding = (0x10 - (src_len & 0x0f));
char pad[16]; char pad[16];
@ -184,11 +185,14 @@ static int ceph_aes_encrypt(const void *key, int key_len,
if (ret) if (ret)
goto out_tfm; goto out_tfm;
crypto_blkcipher_setkey((void *)tfm, key, key_len); crypto_skcipher_setkey((void *)tfm, key, key_len);
iv = crypto_blkcipher_crt(tfm)->iv;
ivsize = crypto_blkcipher_ivsize(tfm);
memcpy(iv, aes_iv, ivsize); memcpy(iv, aes_iv, ivsize);
skcipher_request_set_tfm(req, tfm);
skcipher_request_set_callback(req, 0, NULL, NULL);
skcipher_request_set_crypt(req, sg_in, sg_out.sgl,
src_len + zero_padding, iv);
/* /*
print_hex_dump(KERN_ERR, "enc key: ", DUMP_PREFIX_NONE, 16, 1, print_hex_dump(KERN_ERR, "enc key: ", DUMP_PREFIX_NONE, 16, 1,
key, key_len, 1); key, key_len, 1);
@ -197,8 +201,8 @@ static int ceph_aes_encrypt(const void *key, int key_len,
print_hex_dump(KERN_ERR, "enc pad: ", DUMP_PREFIX_NONE, 16, 1, print_hex_dump(KERN_ERR, "enc pad: ", DUMP_PREFIX_NONE, 16, 1,
pad, zero_padding, 1); pad, zero_padding, 1);
*/ */
ret = crypto_blkcipher_encrypt(&desc, sg_out.sgl, sg_in, ret = crypto_skcipher_encrypt(req);
src_len + zero_padding); skcipher_request_zero(req);
if (ret < 0) { if (ret < 0) {
pr_err("ceph_aes_crypt failed %d\n", ret); pr_err("ceph_aes_crypt failed %d\n", ret);
goto out_sg; goto out_sg;
@ -211,7 +215,7 @@ static int ceph_aes_encrypt(const void *key, int key_len,
out_sg: out_sg:
teardown_sgtable(&sg_out); teardown_sgtable(&sg_out);
out_tfm: out_tfm:
crypto_free_blkcipher(tfm); crypto_free_skcipher(tfm);
return ret; return ret;
} }
@ -222,11 +226,11 @@ static int ceph_aes_encrypt2(const void *key, int key_len, void *dst,
{ {
struct scatterlist sg_in[3], prealloc_sg; struct scatterlist sg_in[3], prealloc_sg;
struct sg_table sg_out; struct sg_table sg_out;
struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher(); struct crypto_skcipher *tfm = ceph_crypto_alloc_cipher();
struct blkcipher_desc desc = { .tfm = tfm, .flags = 0 }; SKCIPHER_REQUEST_ON_STACK(req, tfm);
int ret; int ret;
void *iv; int ivsize = AES_BLOCK_SIZE;
int ivsize; char iv[ivsize];
size_t zero_padding = (0x10 - ((src1_len + src2_len) & 0x0f)); size_t zero_padding = (0x10 - ((src1_len + src2_len) & 0x0f));
char pad[16]; char pad[16];
@ -245,11 +249,14 @@ static int ceph_aes_encrypt2(const void *key, int key_len, void *dst,
if (ret) if (ret)
goto out_tfm; goto out_tfm;
crypto_blkcipher_setkey((void *)tfm, key, key_len); crypto_skcipher_setkey((void *)tfm, key, key_len);
iv = crypto_blkcipher_crt(tfm)->iv;
ivsize = crypto_blkcipher_ivsize(tfm);
memcpy(iv, aes_iv, ivsize); memcpy(iv, aes_iv, ivsize);
skcipher_request_set_tfm(req, tfm);
skcipher_request_set_callback(req, 0, NULL, NULL);
skcipher_request_set_crypt(req, sg_in, sg_out.sgl,
src1_len + src2_len + zero_padding, iv);
/* /*
print_hex_dump(KERN_ERR, "enc key: ", DUMP_PREFIX_NONE, 16, 1, print_hex_dump(KERN_ERR, "enc key: ", DUMP_PREFIX_NONE, 16, 1,
key, key_len, 1); key, key_len, 1);
@ -260,8 +267,8 @@ static int ceph_aes_encrypt2(const void *key, int key_len, void *dst,
print_hex_dump(KERN_ERR, "enc pad: ", DUMP_PREFIX_NONE, 16, 1, print_hex_dump(KERN_ERR, "enc pad: ", DUMP_PREFIX_NONE, 16, 1,
pad, zero_padding, 1); pad, zero_padding, 1);
*/ */
ret = crypto_blkcipher_encrypt(&desc, sg_out.sgl, sg_in, ret = crypto_skcipher_encrypt(req);
src1_len + src2_len + zero_padding); skcipher_request_zero(req);
if (ret < 0) { if (ret < 0) {
pr_err("ceph_aes_crypt2 failed %d\n", ret); pr_err("ceph_aes_crypt2 failed %d\n", ret);
goto out_sg; goto out_sg;
@ -274,7 +281,7 @@ static int ceph_aes_encrypt2(const void *key, int key_len, void *dst,
out_sg: out_sg:
teardown_sgtable(&sg_out); teardown_sgtable(&sg_out);
out_tfm: out_tfm:
crypto_free_blkcipher(tfm); crypto_free_skcipher(tfm);
return ret; return ret;
} }
@ -284,11 +291,11 @@ static int ceph_aes_decrypt(const void *key, int key_len,
{ {
struct sg_table sg_in; struct sg_table sg_in;
struct scatterlist sg_out[2], prealloc_sg; struct scatterlist sg_out[2], prealloc_sg;
struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher(); struct crypto_skcipher *tfm = ceph_crypto_alloc_cipher();
struct blkcipher_desc desc = { .tfm = tfm }; SKCIPHER_REQUEST_ON_STACK(req, tfm);
char pad[16]; char pad[16];
void *iv; int ivsize = AES_BLOCK_SIZE;
int ivsize; char iv[16];
int ret; int ret;
int last_byte; int last_byte;
@ -302,18 +309,22 @@ static int ceph_aes_decrypt(const void *key, int key_len,
if (ret) if (ret)
goto out_tfm; goto out_tfm;
crypto_blkcipher_setkey((void *)tfm, key, key_len); crypto_skcipher_setkey((void *)tfm, key, key_len);
iv = crypto_blkcipher_crt(tfm)->iv;
ivsize = crypto_blkcipher_ivsize(tfm);
memcpy(iv, aes_iv, ivsize); memcpy(iv, aes_iv, ivsize);
skcipher_request_set_tfm(req, tfm);
skcipher_request_set_callback(req, 0, NULL, NULL);
skcipher_request_set_crypt(req, sg_in.sgl, sg_out,
src_len, iv);
/* /*
print_hex_dump(KERN_ERR, "dec key: ", DUMP_PREFIX_NONE, 16, 1, print_hex_dump(KERN_ERR, "dec key: ", DUMP_PREFIX_NONE, 16, 1,
key, key_len, 1); key, key_len, 1);
print_hex_dump(KERN_ERR, "dec in: ", DUMP_PREFIX_NONE, 16, 1, print_hex_dump(KERN_ERR, "dec in: ", DUMP_PREFIX_NONE, 16, 1,
src, src_len, 1); src, src_len, 1);
*/ */
ret = crypto_blkcipher_decrypt(&desc, sg_out, sg_in.sgl, src_len); ret = crypto_skcipher_decrypt(req);
skcipher_request_zero(req);
if (ret < 0) { if (ret < 0) {
pr_err("ceph_aes_decrypt failed %d\n", ret); pr_err("ceph_aes_decrypt failed %d\n", ret);
goto out_sg; goto out_sg;
@ -338,7 +349,7 @@ static int ceph_aes_decrypt(const void *key, int key_len,
out_sg: out_sg:
teardown_sgtable(&sg_in); teardown_sgtable(&sg_in);
out_tfm: out_tfm:
crypto_free_blkcipher(tfm); crypto_free_skcipher(tfm);
return ret; return ret;
} }
@ -349,11 +360,11 @@ static int ceph_aes_decrypt2(const void *key, int key_len,
{ {
struct sg_table sg_in; struct sg_table sg_in;
struct scatterlist sg_out[3], prealloc_sg; struct scatterlist sg_out[3], prealloc_sg;
struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher(); struct crypto_skcipher *tfm = ceph_crypto_alloc_cipher();
struct blkcipher_desc desc = { .tfm = tfm }; SKCIPHER_REQUEST_ON_STACK(req, tfm);
char pad[16]; char pad[16];
void *iv; int ivsize = AES_BLOCK_SIZE;
int ivsize; char iv[ivsize];
int ret; int ret;
int last_byte; int last_byte;
@ -368,18 +379,22 @@ static int ceph_aes_decrypt2(const void *key, int key_len,
if (ret) if (ret)
goto out_tfm; goto out_tfm;
crypto_blkcipher_setkey((void *)tfm, key, key_len); crypto_skcipher_setkey((void *)tfm, key, key_len);
iv = crypto_blkcipher_crt(tfm)->iv;
ivsize = crypto_blkcipher_ivsize(tfm);
memcpy(iv, aes_iv, ivsize); memcpy(iv, aes_iv, ivsize);
skcipher_request_set_tfm(req, tfm);
skcipher_request_set_callback(req, 0, NULL, NULL);
skcipher_request_set_crypt(req, sg_in.sgl, sg_out,
src_len, iv);
/* /*
print_hex_dump(KERN_ERR, "dec key: ", DUMP_PREFIX_NONE, 16, 1, print_hex_dump(KERN_ERR, "dec key: ", DUMP_PREFIX_NONE, 16, 1,
key, key_len, 1); key, key_len, 1);
print_hex_dump(KERN_ERR, "dec in: ", DUMP_PREFIX_NONE, 16, 1, print_hex_dump(KERN_ERR, "dec in: ", DUMP_PREFIX_NONE, 16, 1,
src, src_len, 1); src, src_len, 1);
*/ */
ret = crypto_blkcipher_decrypt(&desc, sg_out, sg_in.sgl, src_len); ret = crypto_skcipher_decrypt(req);
skcipher_request_zero(req);
if (ret < 0) { if (ret < 0) {
pr_err("ceph_aes_decrypt failed %d\n", ret); pr_err("ceph_aes_decrypt failed %d\n", ret);
goto out_sg; goto out_sg;
@ -415,7 +430,7 @@ static int ceph_aes_decrypt2(const void *key, int key_len,
out_sg: out_sg:
teardown_sgtable(&sg_in); teardown_sgtable(&sg_in);
out_tfm: out_tfm:
crypto_free_blkcipher(tfm); crypto_free_skcipher(tfm);
return ret; return ret;
} }