diff options
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/padlock-sha.c | 82 |
1 files changed, 52 insertions, 30 deletions
diff --git a/drivers/crypto/padlock-sha.c b/drivers/crypto/padlock-sha.c index a2c8e8514b63..868da54b1850 100644 --- a/drivers/crypto/padlock-sha.c +++ b/drivers/crypto/padlock-sha.c @@ -12,28 +12,24 @@ * */ -#include <crypto/algapi.h> +#include <crypto/internal/hash.h> #include <crypto/sha.h> #include <linux/err.h> #include <linux/module.h> #include <linux/init.h> #include <linux/errno.h> -#include <linux/cryptohash.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/scatterlist.h> #include <asm/i387.h> #include "padlock.h" -#define SHA1_DEFAULT_FALLBACK "sha1-generic" -#define SHA256_DEFAULT_FALLBACK "sha256-generic" - struct padlock_sha_ctx { char *data; size_t used; int bypass; void (*f_sha_padlock)(const char *in, char *out, int count); - struct hash_desc fallback; + struct shash_desc *fallback; }; static inline struct padlock_sha_ctx *ctx(struct crypto_tfm *tfm) @@ -47,21 +43,26 @@ static inline struct padlock_sha_ctx *ctx(struct crypto_tfm *tfm) static struct crypto_alg sha1_alg, sha256_alg; -static void padlock_sha_bypass(struct crypto_tfm *tfm) +static int padlock_sha_bypass(struct crypto_tfm *tfm) { + int err = 0; + if (ctx(tfm)->bypass) - return; + goto out; - crypto_hash_init(&ctx(tfm)->fallback); - if (ctx(tfm)->data && ctx(tfm)->used) { - struct scatterlist sg; + err = crypto_shash_init(ctx(tfm)->fallback); + if (err) + goto out; - sg_init_one(&sg, ctx(tfm)->data, ctx(tfm)->used); - crypto_hash_update(&ctx(tfm)->fallback, &sg, sg.length); - } + if (ctx(tfm)->data && ctx(tfm)->used) + err = crypto_shash_update(ctx(tfm)->fallback, ctx(tfm)->data, + ctx(tfm)->used); ctx(tfm)->used = 0; ctx(tfm)->bypass = 1; + +out: + return err; } static void padlock_sha_init(struct crypto_tfm *tfm) @@ -73,15 +74,18 @@ static void padlock_sha_init(struct crypto_tfm *tfm) static void padlock_sha_update(struct crypto_tfm *tfm, const uint8_t *data, unsigned int length) { + int err; + /* Our buffer is always one page. */ if (unlikely(!ctx(tfm)->bypass && - (ctx(tfm)->used + length > PAGE_SIZE))) - padlock_sha_bypass(tfm); + (ctx(tfm)->used + length > PAGE_SIZE))) { + err = padlock_sha_bypass(tfm); + BUG_ON(err); + } if (unlikely(ctx(tfm)->bypass)) { - struct scatterlist sg; - sg_init_one(&sg, (uint8_t *)data, length); - crypto_hash_update(&ctx(tfm)->fallback, &sg, length); + err = crypto_shash_update(ctx(tfm)->fallback, data, length); + BUG_ON(err); return; } @@ -151,8 +155,11 @@ static void padlock_do_sha256(const char *in, char *out, int count) static void padlock_sha_final(struct crypto_tfm *tfm, uint8_t *out) { + int err; + if (unlikely(ctx(tfm)->bypass)) { - crypto_hash_final(&ctx(tfm)->fallback, out); + err = crypto_shash_final(ctx(tfm)->fallback, out); + BUG_ON(err); ctx(tfm)->bypass = 0; return; } @@ -166,27 +173,41 @@ static void padlock_sha_final(struct crypto_tfm *tfm, uint8_t *out) static int padlock_cra_init(struct crypto_tfm *tfm) { const char *fallback_driver_name = tfm->__crt_alg->cra_name; - struct crypto_hash *fallback_tfm; + struct crypto_shash *fallback_tfm; + int err = -ENOMEM; /* For now we'll allocate one page. This * could eventually be configurable one day. */ ctx(tfm)->data = (char *)__get_free_page(GFP_KERNEL); if (!ctx(tfm)->data) - return -ENOMEM; + goto out; /* Allocate a fallback and abort if it failed. */ - fallback_tfm = crypto_alloc_hash(fallback_driver_name, 0, - CRYPTO_ALG_ASYNC | - CRYPTO_ALG_NEED_FALLBACK); + fallback_tfm = crypto_alloc_shash(fallback_driver_name, 0, + CRYPTO_ALG_NEED_FALLBACK); if (IS_ERR(fallback_tfm)) { printk(KERN_WARNING PFX "Fallback driver '%s' could not be loaded!\n", fallback_driver_name); - free_page((unsigned long)(ctx(tfm)->data)); - return PTR_ERR(fallback_tfm); + err = PTR_ERR(fallback_tfm); + goto out_free_page; } - ctx(tfm)->fallback.tfm = fallback_tfm; + ctx(tfm)->fallback = kmalloc(sizeof(struct shash_desc) + + crypto_shash_descsize(fallback_tfm), + GFP_KERNEL); + if (!ctx(tfm)->fallback) + goto out_free_tfm; + + ctx(tfm)->fallback->tfm = fallback_tfm; + ctx(tfm)->fallback->flags = 0; return 0; + +out_free_tfm: + crypto_free_shash(fallback_tfm); +out_free_page: + free_page((unsigned long)(ctx(tfm)->data)); +out: + return err; } static int padlock_sha1_cra_init(struct crypto_tfm *tfm) @@ -210,8 +231,9 @@ static void padlock_cra_exit(struct crypto_tfm *tfm) ctx(tfm)->data = NULL; } - crypto_free_hash(ctx(tfm)->fallback.tfm); - ctx(tfm)->fallback.tfm = NULL; + crypto_free_shash(ctx(tfm)->fallback->tfm); + + kzfree(ctx(tfm)->fallback); } static struct crypto_alg sha1_alg = { |