diff options
| -rw-r--r-- | crypto/algapi.c | 8 | ||||
| -rw-r--r-- | crypto/cryptomgr.c | 95 | ||||
| -rw-r--r-- | include/linux/crypto.h | 8 |
3 files changed, 84 insertions, 27 deletions
diff --git a/crypto/algapi.c b/crypto/algapi.c index 38aa9e994703..d9559609b525 100644 --- a/crypto/algapi.c +++ b/crypto/algapi.c @@ -439,13 +439,15 @@ EXPORT_SYMBOL_GPL(crypto_unregister_notifier); struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb) { - struct rtattr *rta = tb[CRYPTOA_TYPE - 1]; + 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); @@ -470,13 +472,15 @@ EXPORT_SYMBOL_GPL(crypto_check_attr_type); struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb, u32 type, u32 mask) { - struct rtattr *rta = tb[CRYPTOA_ALG - 1]; + struct rtattr *rta = tb[1]; struct crypto_attr_alg *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; diff --git a/crypto/cryptomgr.c b/crypto/cryptomgr.c index e5fb7cca5107..c83884fec5f9 100644 --- a/crypto/cryptomgr.c +++ b/crypto/cryptomgr.c @@ -24,22 +24,26 @@ #include "internal.h" struct cryptomgr_param { - struct rtattr *tb[CRYPTOA_MAX]; + struct rtattr *tb[CRYPTO_MAX_ATTRS + 2]; struct { struct rtattr attr; struct crypto_attr_type data; } type; - struct { + union { struct rtattr attr; - struct crypto_attr_alg data; - } alg; - - struct { - char name[CRYPTO_MAX_ALG_NAME]; - } larval; - + struct { + struct rtattr attr; + struct crypto_attr_alg data; + } alg; + struct { + struct rtattr attr; + struct crypto_attr_u32 data; + } nu32; + } attrs[CRYPTO_MAX_ATTRS]; + + char larval[CRYPTO_MAX_ALG_NAME]; char template[CRYPTO_MAX_ALG_NAME]; }; @@ -72,7 +76,7 @@ out: module_put_and_exit(0); err: - crypto_larval_error(param->larval.name, param->type.data.type, + crypto_larval_error(param->larval, param->type.data.type, param->type.data.mask); goto out; } @@ -84,6 +88,7 @@ static int cryptomgr_schedule_probe(struct crypto_larval *larval) const char *name = larval->alg.cra_name; const char *p; unsigned int len; + int i; if (!try_module_get(THIS_MODULE)) goto err; @@ -101,33 +106,73 @@ static int cryptomgr_schedule_probe(struct crypto_larval *larval) memcpy(param->template, name, len); - name = p + 1; - len = 0; - for (p = name; *p; p++) { - for (; isalnum(*p) || *p == '-' || *p == '_' || *p == '('; p++) - ; + i = 0; + for (;;) { + int notnum = 0; - if (*p != ')') - goto err_free_param; + name = ++p; + len = 0; + + for (; isalnum(*p) || *p == '-' || *p == '_'; p++) + notnum |= !isdigit(*p); + + if (*p == '(') { + int recursion = 0; + + for (;;) { + if (!*++p) + goto err_free_param; + if (*p == '(') + recursion++; + else if (*p == ')' && !recursion--) + break; + } + + notnum = 1; + } len = p - name; + if (!len) + goto err_free_param; + + if (notnum) { + param->attrs[i].alg.attr.rta_len = + sizeof(param->attrs[i].alg); + param->attrs[i].alg.attr.rta_type = CRYPTOA_ALG; + memcpy(param->attrs[i].alg.data.name, name, len); + } else { + param->attrs[i].nu32.attr.rta_len = + sizeof(param->attrs[i].nu32); + param->attrs[i].nu32.attr.rta_type = CRYPTOA_U32; + param->attrs[i].nu32.data.num = + simple_strtol(name, NULL, 0); + } + + param->tb[i + 1] = ¶m->attrs[i].attr; + i++; + + if (WARN_ON(i >= CRYPTO_MAX_ATTRS)) + goto err_free_param; + + if (*p == ')') + break; + + if (*p != ',') + goto err_free_param; } - if (!len || name[len + 1]) + if (!i) goto err_free_param; + param->tb[i + 1] = NULL; + param->type.attr.rta_len = sizeof(param->type); param->type.attr.rta_type = CRYPTOA_TYPE; param->type.data.type = larval->alg.cra_flags; param->type.data.mask = larval->mask; - param->tb[CRYPTOA_TYPE - 1] = ¶m->type.attr; - - param->alg.attr.rta_len = sizeof(param->alg); - param->alg.attr.rta_type = CRYPTOA_ALG; - memcpy(param->alg.data.name, name, len); - param->tb[CRYPTOA_ALG - 1] = ¶m->alg.attr; + param->tb[0] = ¶m->type.attr; - memcpy(param->larval.name, larval->alg.cra_name, CRYPTO_MAX_ALG_NAME); + memcpy(param->larval, larval->alg.cra_name, CRYPTO_MAX_ALG_NAME); thread = kthread_run(cryptomgr_probe, param, "cryptomgr"); if (IS_ERR(thread)) diff --git a/include/linux/crypto.h b/include/linux/crypto.h index 1072f9abaef6..da09b4ac3ae9 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -425,11 +425,15 @@ enum { CRYPTOA_UNSPEC, CRYPTOA_ALG, CRYPTOA_TYPE, + CRYPTOA_U32, __CRYPTOA_MAX, }; #define CRYPTOA_MAX (__CRYPTOA_MAX - 1) +/* Maximum number of (rtattr) parameters for each template. */ +#define CRYPTO_MAX_ATTRS 32 + struct crypto_attr_alg { char name[CRYPTO_MAX_ALG_NAME]; }; @@ -439,6 +443,10 @@ struct crypto_attr_type { u32 mask; }; +struct crypto_attr_u32 { + u32 num; +}; + /* * Transform user interface. */ |