diff options
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/power/swsusp.c | 163 |
1 files changed, 4 insertions, 159 deletions
diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c index c05f46e..bd3097c 100644 --- a/kernel/power/swsusp.c +++ b/kernel/power/swsusp.c @@ -30,9 +30,6 @@ * Alex Badea <vampire@go.ro>: * Fixed runaway init * - * Andreas Steinmetz <ast@domdv.de>: - * Added encrypted suspend option - * * More state savers are welcome. Especially for the scsi layer... * * For TODOs,FIXMEs also look in Documentation/power/swsusp.txt @@ -67,10 +64,6 @@ #include <asm/tlbflush.h> #include <asm/io.h> -#include <linux/random.h> -#include <linux/crypto.h> -#include <asm/scatterlist.h> - #include "power.h" #ifdef CONFIG_HIGHMEM @@ -81,10 +74,6 @@ static int save_highmem(void) { return 0; } static int restore_highmem(void) { return 0; } #endif -#define CIPHER "aes" -#define MAXKEY 32 -#define MAXIV 32 - extern char resume_file[]; /* Local variables that should not be affected by save */ @@ -102,8 +91,7 @@ suspend_pagedir_t *pagedir_nosave __nosavedata = NULL; #define SWSUSP_SIG "S1SUSPEND" static struct swsusp_header { - char reserved[PAGE_SIZE - 20 - MAXKEY - MAXIV - sizeof(swp_entry_t)]; - u8 key_iv[MAXKEY+MAXIV]; + char reserved[PAGE_SIZE - 20 - sizeof(swp_entry_t)]; swp_entry_t swsusp_info; char orig_sig[10]; char sig[10]; @@ -123,131 +111,6 @@ static struct swsusp_info swsusp_info; static unsigned short swapfile_used[MAX_SWAPFILES]; static unsigned short root_swap; -static int write_page(unsigned long addr, swp_entry_t *loc); -static int bio_read_page(pgoff_t page_off, void *page); - -static u8 key_iv[MAXKEY+MAXIV]; - -#ifdef CONFIG_SWSUSP_ENCRYPT - -static int crypto_init(int mode, void **mem) -{ - int error = 0; - int len; - char *modemsg; - struct crypto_tfm *tfm; - - modemsg = mode ? "suspend not possible" : "resume not possible"; - - tfm = crypto_alloc_tfm(CIPHER, CRYPTO_TFM_MODE_CBC); - if(!tfm) { - printk(KERN_ERR "swsusp: no tfm, %s\n", modemsg); - error = -EINVAL; - goto out; - } - - if(MAXKEY < crypto_tfm_alg_min_keysize(tfm)) { - printk(KERN_ERR "swsusp: key buffer too small, %s\n", modemsg); - error = -ENOKEY; - goto fail; - } - - if (mode) - get_random_bytes(key_iv, MAXKEY+MAXIV); - - len = crypto_tfm_alg_max_keysize(tfm); - if (len > MAXKEY) - len = MAXKEY; - - if (crypto_cipher_setkey(tfm, key_iv, len)) { - printk(KERN_ERR "swsusp: key setup failure, %s\n", modemsg); - error = -EKEYREJECTED; - goto fail; - } - - len = crypto_tfm_alg_ivsize(tfm); - - if (MAXIV < len) { - printk(KERN_ERR "swsusp: iv buffer too small, %s\n", modemsg); - error = -EOVERFLOW; - goto fail; - } - - crypto_cipher_set_iv(tfm, key_iv+MAXKEY, len); - - *mem=(void *)tfm; - - goto out; - -fail: crypto_free_tfm(tfm); -out: return error; -} - -static __inline__ void crypto_exit(void *mem) -{ - crypto_free_tfm((struct crypto_tfm *)mem); -} - -static __inline__ int crypto_write(struct pbe *p, void *mem) -{ - int error = 0; - struct scatterlist src, dst; - - src.page = virt_to_page(p->address); - src.offset = 0; - src.length = PAGE_SIZE; - dst.page = virt_to_page((void *)&swsusp_header); - dst.offset = 0; - dst.length = PAGE_SIZE; - - error = crypto_cipher_encrypt((struct crypto_tfm *)mem, &dst, &src, - PAGE_SIZE); - - if (!error) - error = write_page((unsigned long)&swsusp_header, - &(p->swap_address)); - return error; -} - -static __inline__ int crypto_read(struct pbe *p, void *mem) -{ - int error = 0; - struct scatterlist src, dst; - - error = bio_read_page(swp_offset(p->swap_address), (void *)p->address); - if (!error) { - src.offset = 0; - src.length = PAGE_SIZE; - dst.offset = 0; - dst.length = PAGE_SIZE; - src.page = dst.page = virt_to_page((void *)p->address); - - error = crypto_cipher_decrypt((struct crypto_tfm *)mem, &dst, - &src, PAGE_SIZE); - } - return error; -} -#else -static __inline__ int crypto_init(int mode, void *mem) -{ - return 0; -} - -static __inline__ void crypto_exit(void *mem) -{ -} - -static __inline__ int crypto_write(struct pbe *p, void *mem) -{ - return write_page(p->address, &(p->swap_address)); -} - -static __inline__ int crypto_read(struct pbe *p, void *mem) -{ - return bio_read_page(swp_offset(p->swap_address), (void *)p->address); -} -#endif - static int mark_swapfiles(swp_entry_t prev) { int error; @@ -259,7 +122,6 @@ static int mark_swapfiles(swp_entry_t prev) !memcmp("SWAPSPACE2",swsusp_header.sig, 10)) { memcpy(swsusp_header.orig_sig,swsusp_header.sig, 10); memcpy(swsusp_header.sig,SWSUSP_SIG, 10); - memcpy(swsusp_header.key_iv, key_iv, MAXKEY+MAXIV); swsusp_header.swsusp_info = prev; error = rw_swap_page_sync(WRITE, swp_entry(root_swap, 0), @@ -405,10 +267,6 @@ static int data_write(void) int error = 0, i = 0; unsigned int mod = nr_copy_pages / 100; struct pbe *p; - void *tfm; - - if ((error = crypto_init(1, &tfm))) - return error; if (!mod) mod = 1; @@ -417,14 +275,11 @@ static int data_write(void) for_each_pbe (p, pagedir_nosave) { if (!(i%mod)) printk( "\b\b\b\b%3d%%", i / mod ); - if ((error = crypto_write(p, tfm))) { - crypto_exit(tfm); + if ((error = write_page(p->address, &p->swap_address))) return error; - } i++; } printk("\b\b\b\bdone\n"); - crypto_exit(tfm); return error; } @@ -550,7 +405,6 @@ static int write_suspend_image(void) if ((error = close_swap())) goto FreePagedir; Done: - memset(key_iv, 0, MAXKEY+MAXIV); return error; FreePagedir: free_pagedir_entries(); @@ -812,8 +666,6 @@ static int check_sig(void) return error; if (!memcmp(SWSUSP_SIG, swsusp_header.sig, 10)) { memcpy(swsusp_header.sig, swsusp_header.orig_sig, 10); - memcpy(key_iv, swsusp_header.key_iv, MAXKEY+MAXIV); - memset(swsusp_header.key_iv, 0, MAXKEY+MAXIV); /* * Reset swap signature now. @@ -840,10 +692,6 @@ static int data_read(struct pbe *pblist) int error = 0; int i = 0; int mod = swsusp_info.image_pages / 100; - void *tfm; - - if ((error = crypto_init(0, &tfm))) - return error; if (!mod) mod = 1; @@ -855,15 +703,13 @@ static int data_read(struct pbe *pblist) if (!(i % mod)) printk("\b\b\b\b%3d%%", i / mod); - if ((error = crypto_read(p, tfm))) { - crypto_exit(tfm); + if ((error = bio_read_page(swp_offset(p->swap_address), + (void *)p->address))) return error; - } i++; } printk("\b\b\b\bdone\n"); - crypto_exit(tfm); return error; } @@ -986,7 +832,6 @@ int swsusp_read(void) error = read_suspend_image(); blkdev_put(resume_bdev); - memset(key_iv, 0, MAXKEY+MAXIV); if (!error) pr_debug("swsusp: Reading resume file was successful\n"); |