diff options
Diffstat (limited to 'crypto/shash.c')
-rw-r--r-- | crypto/shash.c | 181 |
1 files changed, 149 insertions, 32 deletions
diff --git a/crypto/shash.c b/crypto/shash.c index 58b46f198449..5845b7d59b2f 100644 --- a/crypto/shash.c +++ b/crypto/shash.c @@ -6,22 +6,31 @@ */ #include <crypto/scatterwalk.h> -#include <crypto/internal/hash.h> +#include <linux/cryptouser.h> #include <linux/err.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/seq_file.h> -#include <linux/cryptouser.h> +#include <linux/string.h> #include <net/netlink.h> -#include <linux/compiler.h> -#include "internal.h" +#include "hash.h" #define MAX_SHASH_ALIGNMASK 63 static const struct crypto_type crypto_shash_type; +static inline struct crypto_istat_hash *shash_get_stat(struct shash_alg *alg) +{ + return hash_get_stat(&alg->halg); +} + +static inline int crypto_shash_errstat(struct shash_alg *alg, int err) +{ + return crypto_hash_errstat(&alg->halg, err); +} + int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, unsigned int keylen) { @@ -114,11 +123,17 @@ int crypto_shash_update(struct shash_desc *desc, const u8 *data, struct crypto_shash *tfm = desc->tfm; struct shash_alg *shash = crypto_shash_alg(tfm); unsigned long alignmask = crypto_shash_alignmask(tfm); + int err; + + if (IS_ENABLED(CONFIG_CRYPTO_STATS)) + atomic64_add(len, &shash_get_stat(shash)->hash_tlen); if ((unsigned long)data & alignmask) - return shash_update_unaligned(desc, data, len); + err = shash_update_unaligned(desc, data, len); + else + err = shash->update(desc, data, len); - return shash->update(desc, data, len); + return crypto_shash_errstat(shash, err); } EXPORT_SYMBOL_GPL(crypto_shash_update); @@ -155,19 +170,25 @@ int crypto_shash_final(struct shash_desc *desc, u8 *out) struct crypto_shash *tfm = desc->tfm; struct shash_alg *shash = crypto_shash_alg(tfm); unsigned long alignmask = crypto_shash_alignmask(tfm); + int err; + + if (IS_ENABLED(CONFIG_CRYPTO_STATS)) + atomic64_inc(&shash_get_stat(shash)->hash_cnt); if ((unsigned long)out & alignmask) - return shash_final_unaligned(desc, out); + err = shash_final_unaligned(desc, out); + else + err = shash->final(desc, out); - return shash->final(desc, out); + return crypto_shash_errstat(shash, err); } EXPORT_SYMBOL_GPL(crypto_shash_final); static int shash_finup_unaligned(struct shash_desc *desc, const u8 *data, unsigned int len, u8 *out) { - return crypto_shash_update(desc, data, len) ?: - crypto_shash_final(desc, out); + return shash_update_unaligned(desc, data, len) ?: + shash_final_unaligned(desc, out); } int crypto_shash_finup(struct shash_desc *desc, const u8 *data, @@ -176,11 +197,22 @@ int crypto_shash_finup(struct shash_desc *desc, const u8 *data, struct crypto_shash *tfm = desc->tfm; struct shash_alg *shash = crypto_shash_alg(tfm); unsigned long alignmask = crypto_shash_alignmask(tfm); + int err; + + if (IS_ENABLED(CONFIG_CRYPTO_STATS)) { + struct crypto_istat_hash *istat = shash_get_stat(shash); + + atomic64_inc(&istat->hash_cnt); + atomic64_add(len, &istat->hash_tlen); + } if (((unsigned long)data | (unsigned long)out) & alignmask) - return shash_finup_unaligned(desc, data, len, out); + err = shash_finup_unaligned(desc, data, len, out); + else + err = shash->finup(desc, data, len, out); - return shash->finup(desc, data, len, out); + + return crypto_shash_errstat(shash, err); } EXPORT_SYMBOL_GPL(crypto_shash_finup); @@ -188,7 +220,8 @@ static int shash_digest_unaligned(struct shash_desc *desc, const u8 *data, unsigned int len, u8 *out) { return crypto_shash_init(desc) ?: - crypto_shash_finup(desc, data, len, out); + shash_update_unaligned(desc, data, len) ?: + shash_final_unaligned(desc, out); } int crypto_shash_digest(struct shash_desc *desc, const u8 *data, @@ -197,14 +230,23 @@ int crypto_shash_digest(struct shash_desc *desc, const u8 *data, struct crypto_shash *tfm = desc->tfm; struct shash_alg *shash = crypto_shash_alg(tfm); unsigned long alignmask = crypto_shash_alignmask(tfm); + int err; - if (crypto_shash_get_flags(tfm) & CRYPTO_TFM_NEED_KEY) - return -ENOKEY; + if (IS_ENABLED(CONFIG_CRYPTO_STATS)) { + struct crypto_istat_hash *istat = shash_get_stat(shash); - if (((unsigned long)data | (unsigned long)out) & alignmask) - return shash_digest_unaligned(desc, data, len, out); + atomic64_inc(&istat->hash_cnt); + atomic64_add(len, &istat->hash_tlen); + } - return shash->digest(desc, data, len, out); + if (crypto_shash_get_flags(tfm) & CRYPTO_TFM_NEED_KEY) + err = -ENOKEY; + else if (((unsigned long)data | (unsigned long)out) & alignmask) + err = shash_digest_unaligned(desc, data, len, out); + else + err = shash->digest(desc, data, len, out); + + return crypto_shash_errstat(shash, err); } EXPORT_SYMBOL_GPL(crypto_shash_digest); @@ -403,6 +445,24 @@ int crypto_init_shash_ops_async(struct crypto_tfm *tfm) return 0; } +struct crypto_ahash *crypto_clone_shash_ops_async(struct crypto_ahash *nhash, + struct crypto_ahash *hash) +{ + struct crypto_shash **nctx = crypto_ahash_ctx(nhash); + struct crypto_shash **ctx = crypto_ahash_ctx(hash); + struct crypto_shash *shash; + + shash = crypto_clone_shash(*ctx); + if (IS_ERR(shash)) { + crypto_free_ahash(nhash); + return ERR_CAST(shash); + } + + *nctx = shash; + + return nhash; +} + static void crypto_shash_exit_tfm(struct crypto_tfm *tfm) { struct crypto_shash *hash = __crypto_shash_cast(tfm); @@ -448,8 +508,8 @@ static void crypto_shash_free_instance(struct crypto_instance *inst) shash->free(shash); } -#ifdef CONFIG_NET -static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) +static int __maybe_unused crypto_shash_report( + struct sk_buff *skb, struct crypto_alg *alg) { struct crypto_report_hash rhash; struct shash_alg *salg = __crypto_shash_alg(alg); @@ -463,12 +523,6 @@ static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) return nla_put(skb, CRYPTOCFGA_REPORT_HASH, sizeof(rhash), &rhash); } -#else -static int crypto_shash_report(struct sk_buff *skb, struct crypto_alg *alg) -{ - return -ENOSYS; -} -#endif static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) __maybe_unused; @@ -481,6 +535,12 @@ static void crypto_shash_show(struct seq_file *m, struct crypto_alg *alg) seq_printf(m, "digestsize : %u\n", salg->digestsize); } +static int __maybe_unused crypto_shash_report_stat( + struct sk_buff *skb, struct crypto_alg *alg) +{ + return crypto_hash_report_stat(skb, alg, "shash"); +} + static const struct crypto_type crypto_shash_type = { .extsize = crypto_alg_extsize, .init_tfm = crypto_shash_init_tfm, @@ -488,7 +548,12 @@ static const struct crypto_type crypto_shash_type = { #ifdef CONFIG_PROC_FS .show = crypto_shash_show, #endif +#ifdef CONFIG_CRYPTO_USER .report = crypto_shash_report, +#endif +#ifdef CONFIG_CRYPTO_STATS + .report_stat = crypto_shash_report_stat, +#endif .maskclear = ~CRYPTO_ALG_TYPE_MASK, .maskset = CRYPTO_ALG_TYPE_MASK, .type = CRYPTO_ALG_TYPE_SHASH, @@ -517,13 +582,62 @@ int crypto_has_shash(const char *alg_name, u32 type, u32 mask) } EXPORT_SYMBOL_GPL(crypto_has_shash); -static int shash_prepare_alg(struct shash_alg *alg) +struct crypto_shash *crypto_clone_shash(struct crypto_shash *hash) +{ + struct crypto_tfm *tfm = crypto_shash_tfm(hash); + struct shash_alg *alg = crypto_shash_alg(hash); + struct crypto_shash *nhash; + int err; + + if (!crypto_shash_alg_has_setkey(alg)) { + tfm = crypto_tfm_get(tfm); + if (IS_ERR(tfm)) + return ERR_CAST(tfm); + + return hash; + } + + if (!alg->clone_tfm) + return ERR_PTR(-ENOSYS); + + nhash = crypto_clone_tfm(&crypto_shash_type, tfm); + if (IS_ERR(nhash)) + return nhash; + + nhash->descsize = hash->descsize; + + err = alg->clone_tfm(nhash, hash); + if (err) { + crypto_free_shash(nhash); + return ERR_PTR(err); + } + + return nhash; +} +EXPORT_SYMBOL_GPL(crypto_clone_shash); + +int hash_prepare_alg(struct hash_alg_common *alg) { + struct crypto_istat_hash *istat = hash_get_stat(alg); struct crypto_alg *base = &alg->base; - if (alg->digestsize > HASH_MAX_DIGESTSIZE || - alg->descsize > HASH_MAX_DESCSIZE || - alg->statesize > HASH_MAX_STATESIZE) + if (alg->digestsize > HASH_MAX_DIGESTSIZE) + return -EINVAL; + + base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; + + if (IS_ENABLED(CONFIG_CRYPTO_STATS)) + memset(istat, 0, sizeof(*istat)); + + return 0; +} + +static int shash_prepare_alg(struct shash_alg *alg) +{ + struct crypto_alg *base = &alg->halg.base; + int err; + + if (alg->descsize > HASH_MAX_DESCSIZE) return -EINVAL; if (base->cra_alignmask > MAX_SHASH_ALIGNMASK) @@ -532,8 +646,11 @@ static int shash_prepare_alg(struct shash_alg *alg) if ((alg->export && !alg->import) || (alg->import && !alg->export)) return -EINVAL; + err = hash_prepare_alg(&alg->halg); + if (err) + return err; + base->cra_type = &crypto_shash_type; - base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; base->cra_flags |= CRYPTO_ALG_TYPE_SHASH; if (!alg->finup) @@ -543,7 +660,7 @@ static int shash_prepare_alg(struct shash_alg *alg) if (!alg->export) { alg->export = shash_default_export; alg->import = shash_default_import; - alg->statesize = alg->descsize; + alg->halg.statesize = alg->descsize; } if (!alg->setkey) alg->setkey = shash_no_setkey; |