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author | Herbert Xu <herbert@gondor.apana.org.au> | 2008-08-03 21:15:23 +0800 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2008-08-29 15:49:57 +1000 |
commit | 73d3864a4823abda19ebc4387b6ddcbf416e3a77 (patch) | |
tree | 2939754dc2532f412c34a974e5f22dde112c525d /crypto/api.c | |
parent | da7f033ddc9fdebb3223b0bf88a2a2ab5b797608 (diff) | |
download | linux-stable-73d3864a4823abda19ebc4387b6ddcbf416e3a77.tar.gz linux-stable-73d3864a4823abda19ebc4387b6ddcbf416e3a77.tar.bz2 linux-stable-73d3864a4823abda19ebc4387b6ddcbf416e3a77.zip |
crypto: api - Use test infrastructure
This patch makes use of the new testing infrastructure by requiring
algorithms to pass a run-time test before they're made available to
users.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/api.c')
-rw-r--r-- | crypto/api.c | 73 |
1 files changed, 58 insertions, 15 deletions
diff --git a/crypto/api.c b/crypto/api.c index 0906cedd4521..0444d242e985 100644 --- a/crypto/api.c +++ b/crypto/api.c @@ -55,6 +55,11 @@ void crypto_mod_put(struct crypto_alg *alg) } EXPORT_SYMBOL_GPL(crypto_mod_put); +static inline int crypto_is_test_larval(struct crypto_larval *larval) +{ + return larval->alg.cra_driver_name[0]; +} + static struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask) { @@ -71,6 +76,7 @@ static struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, continue; if (crypto_is_larval(q) && + !crypto_is_test_larval((struct crypto_larval *)q) && ((struct crypto_larval *)q)->mask != mask) continue; @@ -104,10 +110,8 @@ static void crypto_larval_destroy(struct crypto_alg *alg) kfree(larval); } -static struct crypto_alg *crypto_larval_alloc(const char *name, u32 type, - u32 mask) +struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask) { - struct crypto_alg *alg; struct crypto_larval *larval; larval = kzalloc(sizeof(*larval), GFP_KERNEL); @@ -119,10 +123,25 @@ static struct crypto_alg *crypto_larval_alloc(const char *name, u32 type, larval->alg.cra_priority = -1; larval->alg.cra_destroy = crypto_larval_destroy; - atomic_set(&larval->alg.cra_refcnt, 2); strlcpy(larval->alg.cra_name, name, CRYPTO_MAX_ALG_NAME); init_completion(&larval->completion); + return larval; +} +EXPORT_SYMBOL_GPL(crypto_larval_alloc); + +static struct crypto_alg *crypto_larval_add(const char *name, u32 type, + u32 mask) +{ + struct crypto_alg *alg; + struct crypto_larval *larval; + + larval = crypto_larval_alloc(name, type, mask); + if (IS_ERR(larval)) + return ERR_CAST(larval); + + atomic_set(&larval->alg.cra_refcnt, 2); + down_write(&crypto_alg_sem); alg = __crypto_alg_lookup(name, type, mask); if (!alg) { @@ -152,14 +171,23 @@ EXPORT_SYMBOL_GPL(crypto_larval_kill); static struct crypto_alg *crypto_larval_wait(struct crypto_alg *alg) { struct crypto_larval *larval = (void *)alg; + long timeout; + + timeout = wait_for_completion_interruptible_timeout( + &larval->completion, 60 * HZ); - wait_for_completion_interruptible_timeout(&larval->completion, 60 * HZ); alg = larval->adult; - if (alg) { - if (!crypto_mod_get(alg)) - alg = ERR_PTR(-EAGAIN); - } else + if (timeout < 0) + alg = ERR_PTR(-EINTR); + else if (!timeout) + alg = ERR_PTR(-ETIMEDOUT); + else if (!alg) alg = ERR_PTR(-ENOENT); + else if (crypto_is_test_larval(larval) && + !(alg->cra_flags & CRYPTO_ALG_TESTED)) + alg = ERR_PTR(-EAGAIN); + else if (!crypto_mod_get(alg)) + alg = ERR_PTR(-EAGAIN); crypto_mod_put(&larval->alg); return alg; @@ -192,25 +220,40 @@ struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask) if (alg) return crypto_is_larval(alg) ? crypto_larval_wait(alg) : alg; - return crypto_larval_alloc(name, type, mask); + return crypto_larval_add(name, type, mask); } EXPORT_SYMBOL_GPL(crypto_larval_lookup); +int crypto_probing_notify(unsigned long val, void *v) +{ + int ok; + + ok = blocking_notifier_call_chain(&crypto_chain, val, v); + if (ok == NOTIFY_DONE) { + request_module("cryptomgr"); + ok = blocking_notifier_call_chain(&crypto_chain, val, v); + } + + return ok; +} +EXPORT_SYMBOL_GPL(crypto_probing_notify); + struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask) { struct crypto_alg *alg; struct crypto_alg *larval; int ok; + if (!(mask & CRYPTO_ALG_TESTED)) { + type |= CRYPTO_ALG_TESTED; + mask |= CRYPTO_ALG_TESTED; + } + larval = crypto_larval_lookup(name, type, mask); if (IS_ERR(larval) || !crypto_is_larval(larval)) return larval; - ok = crypto_notify(CRYPTO_MSG_ALG_REQUEST, larval); - if (ok == NOTIFY_DONE) { - request_module("cryptomgr"); - ok = crypto_notify(CRYPTO_MSG_ALG_REQUEST, larval); - } + ok = crypto_probing_notify(CRYPTO_MSG_ALG_REQUEST, larval); if (ok == NOTIFY_STOP) alg = crypto_larval_wait(larval); |