X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=crypto%2Falgapi.c;h=e65cb50cf4aff8b739130ba7012e383196ef286a;hb=f473aa5e025bc8e0c5fe9352f65178a54adadec2;hp=69eb504721a43dc3abd941a5be99dd0e4f0d825b;hpb=f1ddcaf3393b7a3871809b97fae90fac841a1f39;p=safe%2Fjmp%2Flinux-2.6 diff --git a/crypto/algapi.c b/crypto/algapi.c index 69eb504..e65cb50 100644 --- a/crypto/algapi.c +++ b/crypto/algapi.c @@ -34,7 +34,7 @@ void crypto_larval_error(const char *name, u32 type, u32 mask) if (alg) { if (crypto_is_larval(alg)) { struct crypto_larval *larval = (void *)alg; - complete(&larval->completion); + complete_all(&larval->completion); } crypto_mod_put(alg); } @@ -63,9 +63,6 @@ static int crypto_check_alg(struct crypto_alg *alg) if (alg->cra_alignmask & (alg->cra_alignmask + 1)) return -EINVAL; - if (alg->cra_alignmask & alg->cra_blocksize) - return -EINVAL; - if (alg->cra_blocksize > PAGE_SIZE / 8) return -EINVAL; @@ -84,36 +81,50 @@ static void crypto_destroy_instance(struct crypto_alg *alg) crypto_tmpl_put(tmpl); } -static void crypto_remove_spawns(struct list_head *spawns, - struct list_head *list) +static void crypto_remove_spawn(struct crypto_spawn *spawn, + struct list_head *list, + struct list_head *secondary_spawns) { - struct crypto_spawn *spawn, *n; + struct crypto_instance *inst = spawn->inst; + struct crypto_template *tmpl = inst->tmpl; - list_for_each_entry_safe(spawn, n, spawns, list) { - struct crypto_instance *inst = spawn->inst; - struct crypto_template *tmpl = inst->tmpl; + list_del_init(&spawn->list); + spawn->alg = NULL; - list_del_init(&spawn->list); - spawn->alg = NULL; + if (crypto_is_dead(&inst->alg)) + return; - if (crypto_is_dead(&inst->alg)) - continue; + inst->alg.cra_flags |= CRYPTO_ALG_DEAD; + if (hlist_unhashed(&inst->list)) + return; + + if (!tmpl || !crypto_tmpl_get(tmpl)) + return; + + crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, &inst->alg); + list_move(&inst->alg.cra_list, list); + hlist_del(&inst->list); + inst->alg.cra_destroy = crypto_destroy_instance; + + list_splice(&inst->alg.cra_users, secondary_spawns); +} + +static void crypto_remove_spawns(struct list_head *spawns, + struct list_head *list, u32 new_type) +{ + struct crypto_spawn *spawn, *n; + LIST_HEAD(secondary_spawns); - inst->alg.cra_flags |= CRYPTO_ALG_DEAD; - if (!tmpl || !crypto_tmpl_get(tmpl)) + list_for_each_entry_safe(spawn, n, spawns, list) { + if ((spawn->alg->cra_flags ^ new_type) & spawn->mask) continue; - crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, &inst->alg); - list_move(&inst->alg.cra_list, list); - hlist_del(&inst->list); - inst->alg.cra_destroy = crypto_destroy_instance; + crypto_remove_spawn(spawn, list, &secondary_spawns); + } - if (!list_empty(&inst->alg.cra_users)) { - if (&n->list == spawns) - n = list_entry(inst->alg.cra_users.next, - typeof(*n), list); - __list_splice(&inst->alg.cra_users, spawns->prev); - } + while (!list_empty(&secondary_spawns)) { + list_for_each_entry_safe(spawn, n, &secondary_spawns, list) + crypto_remove_spawn(spawn, list, &secondary_spawns); } } @@ -141,6 +152,11 @@ static int __crypto_register_alg(struct crypto_alg *alg, if (crypto_is_larval(q)) { struct crypto_larval *larval = (void *)q; + /* + * Check to see if either our generic name or + * specific name can satisfy the name requested + * by the larval entry q. + */ if (strcmp(alg->cra_name, q->cra_name) && strcmp(alg->cra_driver_name, q->cra_name)) continue; @@ -153,7 +169,7 @@ static int __crypto_register_alg(struct crypto_alg *alg, continue; larval->adult = alg; - complete(&larval->completion); + complete_all(&larval->completion); continue; } @@ -164,7 +180,7 @@ static int __crypto_register_alg(struct crypto_alg *alg, q->cra_priority > alg->cra_priority) continue; - crypto_remove_spawns(&q->cra_users, list); + crypto_remove_spawns(&q->cra_users, list, alg->cra_flags); } list_add(&alg->cra_list, &crypto_alg_list); @@ -214,7 +230,7 @@ static int crypto_remove_alg(struct crypto_alg *alg, struct list_head *list) crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, alg); list_del_init(&alg->cra_list); - crypto_remove_spawns(&alg->cra_users, list); + crypto_remove_spawns(&alg->cra_users, list, alg->cra_flags); return 0; } @@ -322,9 +338,6 @@ int crypto_register_instance(struct crypto_template *tmpl, LIST_HEAD(list); int err = -EINVAL; - if (inst->alg.cra_destroy) - goto err; - err = crypto_check_alg(&inst->alg); if (err) goto err; @@ -351,11 +364,12 @@ err: EXPORT_SYMBOL_GPL(crypto_register_instance); int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, - struct crypto_instance *inst) + struct crypto_instance *inst, u32 mask) { int err = -EAGAIN; spawn->inst = inst; + spawn->mask = mask; down_write(&crypto_alg_sem); if (!crypto_is_moribund(alg)) { @@ -377,7 +391,8 @@ void crypto_drop_spawn(struct crypto_spawn *spawn) } EXPORT_SYMBOL_GPL(crypto_drop_spawn); -struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn) +struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, + u32 mask) { struct crypto_alg *alg; struct crypto_alg *alg2; @@ -396,11 +411,19 @@ struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn) return ERR_PTR(-EAGAIN); } - tfm = __crypto_alloc_tfm(alg); + tfm = ERR_PTR(-EINVAL); + if (unlikely((alg->cra_flags ^ type) & mask)) + goto out_put_alg; + + tfm = __crypto_alloc_tfm(alg, type, mask); if (IS_ERR(tfm)) - crypto_mod_put(alg); + goto out_put_alg; return tfm; + +out_put_alg: + crypto_mod_put(alg); + return tfm; } EXPORT_SYMBOL_GPL(crypto_spawn_tfm); @@ -416,23 +439,88 @@ int crypto_unregister_notifier(struct notifier_block *nb) } EXPORT_SYMBOL_GPL(crypto_unregister_notifier); -struct crypto_alg *crypto_get_attr_alg(void *param, unsigned int len, - u32 type, u32 mask) +struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb) +{ + struct rtattr *rta = tb[0]; + struct crypto_attr_type *algt; + + if (!rta) + return ERR_PTR(-ENOENT); + if (RTA_PAYLOAD(rta) < sizeof(*algt)) + return ERR_PTR(-EINVAL); + if (rta->rta_type != CRYPTOA_TYPE) + return ERR_PTR(-EINVAL); + + algt = RTA_DATA(rta); + + return algt; +} +EXPORT_SYMBOL_GPL(crypto_get_attr_type); + +int crypto_check_attr_type(struct rtattr **tb, u32 type) +{ + struct crypto_attr_type *algt; + + algt = crypto_get_attr_type(tb); + if (IS_ERR(algt)) + return PTR_ERR(algt); + + if ((algt->type ^ type) & algt->mask) + return -EINVAL; + + return 0; +} +EXPORT_SYMBOL_GPL(crypto_check_attr_type); + +const char *crypto_attr_alg_name(struct rtattr *rta) { - struct rtattr *rta = param; struct crypto_attr_alg *alga; - if (!RTA_OK(rta, len)) - return ERR_PTR(-EBADR); - if (rta->rta_type != CRYPTOA_ALG || RTA_PAYLOAD(rta) < sizeof(*alga)) + if (!rta) + return ERR_PTR(-ENOENT); + if (RTA_PAYLOAD(rta) < sizeof(*alga)) + return ERR_PTR(-EINVAL); + if (rta->rta_type != CRYPTOA_ALG) return ERR_PTR(-EINVAL); alga = RTA_DATA(rta); alga->name[CRYPTO_MAX_ALG_NAME - 1] = 0; - return crypto_alg_mod_lookup(alga->name, type, mask); + return alga->name; } -EXPORT_SYMBOL_GPL(crypto_get_attr_alg); +EXPORT_SYMBOL_GPL(crypto_attr_alg_name); + +struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask) +{ + const char *name; + int err; + + name = crypto_attr_alg_name(rta); + err = PTR_ERR(name); + if (IS_ERR(name)) + return ERR_PTR(err); + + return crypto_alg_mod_lookup(name, type, mask); +} +EXPORT_SYMBOL_GPL(crypto_attr_alg); + +int crypto_attr_u32(struct rtattr *rta, u32 *num) +{ + struct crypto_attr_u32 *nu32; + + if (!rta) + return -ENOENT; + if (RTA_PAYLOAD(rta) < sizeof(*nu32)) + return -EINVAL; + if (rta->rta_type != CRYPTOA_U32) + return -EINVAL; + + nu32 = RTA_DATA(rta); + *num = nu32->num; + + return 0; +} +EXPORT_SYMBOL_GPL(crypto_attr_u32); struct crypto_instance *crypto_alloc_instance(const char *name, struct crypto_alg *alg) @@ -455,7 +543,8 @@ struct crypto_instance *crypto_alloc_instance(const char *name, goto err_free_inst; spawn = crypto_instance_ctx(inst); - err = crypto_init_spawn(spawn, alg, inst); + err = crypto_init_spawn(spawn, alg, inst, + CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC); if (err) goto err_free_inst; @@ -468,6 +557,115 @@ err_free_inst: } EXPORT_SYMBOL_GPL(crypto_alloc_instance); +void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen) +{ + INIT_LIST_HEAD(&queue->list); + queue->backlog = &queue->list; + queue->qlen = 0; + queue->max_qlen = max_qlen; +} +EXPORT_SYMBOL_GPL(crypto_init_queue); + +int crypto_enqueue_request(struct crypto_queue *queue, + struct crypto_async_request *request) +{ + int err = -EINPROGRESS; + + if (unlikely(queue->qlen >= queue->max_qlen)) { + err = -EBUSY; + if (!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) + goto out; + if (queue->backlog == &queue->list) + queue->backlog = &request->list; + } + + queue->qlen++; + list_add_tail(&request->list, &queue->list); + +out: + return err; +} +EXPORT_SYMBOL_GPL(crypto_enqueue_request); + +struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue) +{ + struct list_head *request; + + if (unlikely(!queue->qlen)) + return NULL; + + queue->qlen--; + + if (queue->backlog != &queue->list) + queue->backlog = queue->backlog->next; + + request = queue->list.next; + list_del(request); + + return list_entry(request, struct crypto_async_request, list); +} +EXPORT_SYMBOL_GPL(crypto_dequeue_request); + +int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm) +{ + struct crypto_async_request *req; + + list_for_each_entry(req, &queue->list, list) { + if (req->tfm == tfm) + return 1; + } + + return 0; +} +EXPORT_SYMBOL_GPL(crypto_tfm_in_queue); + +static inline void crypto_inc_byte(u8 *a, unsigned int size) +{ + u8 *b = (a + size); + u8 c; + + for (; size; size--) { + c = *--b + 1; + *b = c; + if (c) + break; + } +} + +void crypto_inc(u8 *a, unsigned int size) +{ + __be32 *b = (__be32 *)(a + size); + u32 c; + + for (; size >= 4; size -= 4) { + c = be32_to_cpu(*--b) + 1; + *b = cpu_to_be32(c); + if (c) + return; + } + + crypto_inc_byte(a, size); +} +EXPORT_SYMBOL_GPL(crypto_inc); + +static inline void crypto_xor_byte(u8 *a, const u8 *b, unsigned int size) +{ + for (; size; size--) + *a++ ^= *b++; +} + +void crypto_xor(u8 *dst, const u8 *src, unsigned int size) +{ + u32 *a = (u32 *)dst; + u32 *b = (u32 *)src; + + for (; size >= 4; size -= 4) + *a++ ^= *b++; + + crypto_xor_byte((u8 *)a, (u8 *)b, size); +} +EXPORT_SYMBOL_GPL(crypto_xor); + static int __init crypto_algapi_init(void) { crypto_init_proc();