From 3f32a5bee0c8b2d4f25138af21620ae164fdb0ff Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Sun, 24 Jan 2016 21:17:38 +0800 Subject: [PATCH] ext4: Use skcipher This patch replaces uses of ablkcipher with skcipher. Signed-off-by: Herbert Xu --- fs/ext4/crypto.c | 24 +++++++++++------------- fs/ext4/crypto_fname.c | 32 +++++++++++++++----------------- fs/ext4/crypto_key.c | 42 ++++++++++++++++++++---------------------- fs/ext4/ext4_crypto.h | 2 +- 4 files changed, 47 insertions(+), 53 deletions(-) diff --git a/fs/ext4/crypto.c b/fs/ext4/crypto.c index c8021208a7eb..845c22a5a744 100644 --- a/fs/ext4/crypto.c +++ b/fs/ext4/crypto.c @@ -18,11 +18,9 @@ * Special Publication 800-38E and IEEE P1619/D16. */ -#include -#include +#include #include #include -#include #include #include #include @@ -261,21 +259,21 @@ static int ext4_page_crypto(struct inode *inode, { u8 xts_tweak[EXT4_XTS_TWEAK_SIZE]; - struct ablkcipher_request *req = NULL; + struct skcipher_request *req = NULL; DECLARE_EXT4_COMPLETION_RESULT(ecr); struct scatterlist dst, src; struct ext4_crypt_info *ci = EXT4_I(inode)->i_crypt_info; - struct crypto_ablkcipher *tfm = ci->ci_ctfm; + struct crypto_skcipher *tfm = ci->ci_ctfm; int res = 0; - req = ablkcipher_request_alloc(tfm, GFP_NOFS); + req = skcipher_request_alloc(tfm, GFP_NOFS); if (!req) { printk_ratelimited(KERN_ERR "%s: crypto_request_alloc() failed\n", __func__); return -ENOMEM; } - ablkcipher_request_set_callback( + skcipher_request_set_callback( req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, ext4_crypt_complete, &ecr); @@ -288,21 +286,21 @@ static int ext4_page_crypto(struct inode *inode, sg_set_page(&dst, dest_page, PAGE_CACHE_SIZE, 0); sg_init_table(&src, 1); sg_set_page(&src, src_page, PAGE_CACHE_SIZE, 0); - ablkcipher_request_set_crypt(req, &src, &dst, PAGE_CACHE_SIZE, - xts_tweak); + skcipher_request_set_crypt(req, &src, &dst, PAGE_CACHE_SIZE, + xts_tweak); if (rw == EXT4_DECRYPT) - res = crypto_ablkcipher_decrypt(req); + res = crypto_skcipher_decrypt(req); else - res = crypto_ablkcipher_encrypt(req); + res = crypto_skcipher_encrypt(req); if (res == -EINPROGRESS || res == -EBUSY) { wait_for_completion(&ecr.completion); res = ecr.res; } - ablkcipher_request_free(req); + skcipher_request_free(req); if (res) { printk_ratelimited( KERN_ERR - "%s: crypto_ablkcipher_encrypt() returned %d\n", + "%s: crypto_skcipher_encrypt() returned %d\n", __func__, res); return res; } diff --git a/fs/ext4/crypto_fname.c b/fs/ext4/crypto_fname.c index 2fbef8a14760..1a2f360405db 100644 --- a/fs/ext4/crypto_fname.c +++ b/fs/ext4/crypto_fname.c @@ -11,11 +11,9 @@ * */ -#include -#include +#include #include #include -#include #include #include #include @@ -65,10 +63,10 @@ static int ext4_fname_encrypt(struct inode *inode, struct ext4_str *oname) { u32 ciphertext_len; - struct ablkcipher_request *req = NULL; + struct skcipher_request *req = NULL; DECLARE_EXT4_COMPLETION_RESULT(ecr); struct ext4_crypt_info *ci = EXT4_I(inode)->i_crypt_info; - struct crypto_ablkcipher *tfm = ci->ci_ctfm; + struct crypto_skcipher *tfm = ci->ci_ctfm; int res = 0; char iv[EXT4_CRYPTO_BLOCK_SIZE]; struct scatterlist src_sg, dst_sg; @@ -95,14 +93,14 @@ static int ext4_fname_encrypt(struct inode *inode, } /* Allocate request */ - req = ablkcipher_request_alloc(tfm, GFP_NOFS); + req = skcipher_request_alloc(tfm, GFP_NOFS); if (!req) { printk_ratelimited( KERN_ERR "%s: crypto_request_alloc() failed\n", __func__); kfree(alloc_buf); return -ENOMEM; } - ablkcipher_request_set_callback(req, + skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, ext4_dir_crypt_complete, &ecr); @@ -117,14 +115,14 @@ static int ext4_fname_encrypt(struct inode *inode, /* Create encryption request */ sg_init_one(&src_sg, workbuf, ciphertext_len); sg_init_one(&dst_sg, oname->name, ciphertext_len); - ablkcipher_request_set_crypt(req, &src_sg, &dst_sg, ciphertext_len, iv); - res = crypto_ablkcipher_encrypt(req); + skcipher_request_set_crypt(req, &src_sg, &dst_sg, ciphertext_len, iv); + res = crypto_skcipher_encrypt(req); if (res == -EINPROGRESS || res == -EBUSY) { wait_for_completion(&ecr.completion); res = ecr.res; } kfree(alloc_buf); - ablkcipher_request_free(req); + skcipher_request_free(req); if (res < 0) { printk_ratelimited( KERN_ERR "%s: Error (error code %d)\n", __func__, res); @@ -145,11 +143,11 @@ static int ext4_fname_decrypt(struct inode *inode, struct ext4_str *oname) { struct ext4_str tmp_in[2], tmp_out[1]; - struct ablkcipher_request *req = NULL; + struct skcipher_request *req = NULL; DECLARE_EXT4_COMPLETION_RESULT(ecr); struct scatterlist src_sg, dst_sg; struct ext4_crypt_info *ci = EXT4_I(inode)->i_crypt_info; - struct crypto_ablkcipher *tfm = ci->ci_ctfm; + struct crypto_skcipher *tfm = ci->ci_ctfm; int res = 0; char iv[EXT4_CRYPTO_BLOCK_SIZE]; unsigned lim = max_name_len(inode); @@ -162,13 +160,13 @@ static int ext4_fname_decrypt(struct inode *inode, tmp_out[0].name = oname->name; /* Allocate request */ - req = ablkcipher_request_alloc(tfm, GFP_NOFS); + req = skcipher_request_alloc(tfm, GFP_NOFS); if (!req) { printk_ratelimited( KERN_ERR "%s: crypto_request_alloc() failed\n", __func__); return -ENOMEM; } - ablkcipher_request_set_callback(req, + skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, ext4_dir_crypt_complete, &ecr); @@ -178,13 +176,13 @@ static int ext4_fname_decrypt(struct inode *inode, /* Create encryption request */ sg_init_one(&src_sg, iname->name, iname->len); sg_init_one(&dst_sg, oname->name, oname->len); - ablkcipher_request_set_crypt(req, &src_sg, &dst_sg, iname->len, iv); - res = crypto_ablkcipher_decrypt(req); + skcipher_request_set_crypt(req, &src_sg, &dst_sg, iname->len, iv); + res = crypto_skcipher_decrypt(req); if (res == -EINPROGRESS || res == -EBUSY) { wait_for_completion(&ecr.completion); res = ecr.res; } - ablkcipher_request_free(req); + skcipher_request_free(req); if (res < 0) { printk_ratelimited( KERN_ERR "%s: Error in ext4_fname_encrypt (error code %d)\n", diff --git a/fs/ext4/crypto_key.c b/fs/ext4/crypto_key.c index 9a16d1e75a49..0129d688d1f7 100644 --- a/fs/ext4/crypto_key.c +++ b/fs/ext4/crypto_key.c @@ -8,6 +8,7 @@ * Written by Michael Halcrow, Ildar Muslukhov, and Uday Savagaonkar, 2015. */ +#include #include #include #include @@ -41,45 +42,42 @@ static int ext4_derive_key_aes(char deriving_key[EXT4_AES_128_ECB_KEY_SIZE], char derived_key[EXT4_AES_256_XTS_KEY_SIZE]) { int res = 0; - struct ablkcipher_request *req = NULL; + struct skcipher_request *req = NULL; DECLARE_EXT4_COMPLETION_RESULT(ecr); struct scatterlist src_sg, dst_sg; - struct crypto_ablkcipher *tfm = crypto_alloc_ablkcipher("ecb(aes)", 0, - 0); + struct crypto_skcipher *tfm = crypto_alloc_skcipher("ecb(aes)", 0, 0); if (IS_ERR(tfm)) { res = PTR_ERR(tfm); tfm = NULL; goto out; } - crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_REQ_WEAK_KEY); - req = ablkcipher_request_alloc(tfm, GFP_NOFS); + crypto_skcipher_set_flags(tfm, CRYPTO_TFM_REQ_WEAK_KEY); + req = skcipher_request_alloc(tfm, GFP_NOFS); if (!req) { res = -ENOMEM; goto out; } - ablkcipher_request_set_callback(req, + skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, derive_crypt_complete, &ecr); - res = crypto_ablkcipher_setkey(tfm, deriving_key, - EXT4_AES_128_ECB_KEY_SIZE); + res = crypto_skcipher_setkey(tfm, deriving_key, + EXT4_AES_128_ECB_KEY_SIZE); if (res < 0) goto out; sg_init_one(&src_sg, source_key, EXT4_AES_256_XTS_KEY_SIZE); sg_init_one(&dst_sg, derived_key, EXT4_AES_256_XTS_KEY_SIZE); - ablkcipher_request_set_crypt(req, &src_sg, &dst_sg, - EXT4_AES_256_XTS_KEY_SIZE, NULL); - res = crypto_ablkcipher_encrypt(req); + skcipher_request_set_crypt(req, &src_sg, &dst_sg, + EXT4_AES_256_XTS_KEY_SIZE, NULL); + res = crypto_skcipher_encrypt(req); if (res == -EINPROGRESS || res == -EBUSY) { wait_for_completion(&ecr.completion); res = ecr.res; } out: - if (req) - ablkcipher_request_free(req); - if (tfm) - crypto_free_ablkcipher(tfm); + skcipher_request_free(req); + crypto_free_skcipher(tfm); return res; } @@ -90,7 +88,7 @@ void ext4_free_crypt_info(struct ext4_crypt_info *ci) if (ci->ci_keyring_key) key_put(ci->ci_keyring_key); - crypto_free_ablkcipher(ci->ci_ctfm); + crypto_free_skcipher(ci->ci_ctfm); kmem_cache_free(ext4_crypt_info_cachep, ci); } @@ -122,7 +120,7 @@ int _ext4_get_encryption_info(struct inode *inode) struct ext4_encryption_context ctx; const struct user_key_payload *ukp; struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); - struct crypto_ablkcipher *ctfm; + struct crypto_skcipher *ctfm; const char *cipher_str; char raw_key[EXT4_MAX_KEY_SIZE]; char mode; @@ -237,7 +235,7 @@ retry: if (res) goto out; got_key: - ctfm = crypto_alloc_ablkcipher(cipher_str, 0, 0); + ctfm = crypto_alloc_skcipher(cipher_str, 0, 0); if (!ctfm || IS_ERR(ctfm)) { res = ctfm ? PTR_ERR(ctfm) : -ENOMEM; printk(KERN_DEBUG @@ -246,11 +244,11 @@ got_key: goto out; } crypt_info->ci_ctfm = ctfm; - crypto_ablkcipher_clear_flags(ctfm, ~0); - crypto_tfm_set_flags(crypto_ablkcipher_tfm(ctfm), + crypto_skcipher_clear_flags(ctfm, ~0); + crypto_tfm_set_flags(crypto_skcipher_tfm(ctfm), CRYPTO_TFM_REQ_WEAK_KEY); - res = crypto_ablkcipher_setkey(ctfm, raw_key, - ext4_encryption_key_size(mode)); + res = crypto_skcipher_setkey(ctfm, raw_key, + ext4_encryption_key_size(mode)); if (res) goto out; memzero_explicit(raw_key, sizeof(raw_key)); diff --git a/fs/ext4/ext4_crypto.h b/fs/ext4/ext4_crypto.h index ac7d4e813796..1f73c29717e1 100644 --- a/fs/ext4/ext4_crypto.h +++ b/fs/ext4/ext4_crypto.h @@ -77,7 +77,7 @@ struct ext4_crypt_info { char ci_data_mode; char ci_filename_mode; char ci_flags; - struct crypto_ablkcipher *ci_ctfm; + struct crypto_skcipher *ci_ctfm; struct key *ci_keyring_key; char ci_master_key[EXT4_KEY_DESCRIPTOR_SIZE]; };