From 4473710df1f8779c59b33737eeaa151596907761 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Thu, 6 Apr 2017 16:16:08 +0800 Subject: [PATCH] crypto: user - Prepare for CRYPTO_MAX_ALG_NAME expansion This patch hard-codes CRYPTO_MAX_NAME in the user-space API to 64, which is the current value of CRYPTO_MAX_ALG_NAME. This patch also replaces all remaining occurences of CRYPTO_MAX_ALG_NAME in the user-space API with CRYPTO_MAX_NAME. This way the user-space API will not be modified when we raise the value of CRYPTO_MAX_ALG_NAME. Furthermore, the code has been updated to handle names longer than the user-space API. They will be truncated. Signed-off-by: Herbert Xu Acked-by: Alexander Sverdlin Tested-by: Alexander Sverdlin --- crypto/crypto_user.c | 18 +++++++++--------- include/uapi/linux/cryptouser.h | 10 +++++----- 2 files changed, 14 insertions(+), 14 deletions(-) diff --git a/crypto/crypto_user.c b/crypto/crypto_user.c index a90404a0c5ff..89acaab1d909 100644 --- a/crypto/crypto_user.c +++ b/crypto/crypto_user.c @@ -83,7 +83,7 @@ static int crypto_report_cipher(struct sk_buff *skb, struct crypto_alg *alg) { struct crypto_report_cipher rcipher; - strncpy(rcipher.type, "cipher", sizeof(rcipher.type)); + strlcpy(rcipher.type, "cipher", sizeof(rcipher.type)); rcipher.blocksize = alg->cra_blocksize; rcipher.min_keysize = alg->cra_cipher.cia_min_keysize; @@ -102,7 +102,7 @@ static int crypto_report_comp(struct sk_buff *skb, struct crypto_alg *alg) { struct crypto_report_comp rcomp; - strncpy(rcomp.type, "compression", sizeof(rcomp.type)); + strlcpy(rcomp.type, "compression", sizeof(rcomp.type)); if (nla_put(skb, CRYPTOCFGA_REPORT_COMPRESS, sizeof(struct crypto_report_comp), &rcomp)) goto nla_put_failure; @@ -116,7 +116,7 @@ static int crypto_report_acomp(struct sk_buff *skb, struct crypto_alg *alg) { struct crypto_report_acomp racomp; - strncpy(racomp.type, "acomp", sizeof(racomp.type)); + strlcpy(racomp.type, "acomp", sizeof(racomp.type)); if (nla_put(skb, CRYPTOCFGA_REPORT_ACOMP, sizeof(struct crypto_report_acomp), &racomp)) @@ -131,7 +131,7 @@ static int crypto_report_akcipher(struct sk_buff *skb, struct crypto_alg *alg) { struct crypto_report_akcipher rakcipher; - strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type)); + strlcpy(rakcipher.type, "akcipher", sizeof(rakcipher.type)); if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER, sizeof(struct crypto_report_akcipher), &rakcipher)) @@ -146,7 +146,7 @@ static int crypto_report_kpp(struct sk_buff *skb, struct crypto_alg *alg) { struct crypto_report_kpp rkpp; - strncpy(rkpp.type, "kpp", sizeof(rkpp.type)); + strlcpy(rkpp.type, "kpp", sizeof(rkpp.type)); if (nla_put(skb, CRYPTOCFGA_REPORT_KPP, sizeof(struct crypto_report_kpp), &rkpp)) @@ -160,10 +160,10 @@ nla_put_failure: static int crypto_report_one(struct crypto_alg *alg, struct crypto_user_alg *ualg, struct sk_buff *skb) { - strncpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name)); - strncpy(ualg->cru_driver_name, alg->cra_driver_name, + strlcpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name)); + strlcpy(ualg->cru_driver_name, alg->cra_driver_name, sizeof(ualg->cru_driver_name)); - strncpy(ualg->cru_module_name, module_name(alg->cra_module), + strlcpy(ualg->cru_module_name, module_name(alg->cra_module), sizeof(ualg->cru_module_name)); ualg->cru_type = 0; @@ -176,7 +176,7 @@ static int crypto_report_one(struct crypto_alg *alg, if (alg->cra_flags & CRYPTO_ALG_LARVAL) { struct crypto_report_larval rl; - strncpy(rl.type, "larval", sizeof(rl.type)); + strlcpy(rl.type, "larval", sizeof(rl.type)); if (nla_put(skb, CRYPTOCFGA_REPORT_LARVAL, sizeof(struct crypto_report_larval), &rl)) goto nla_put_failure; diff --git a/include/uapi/linux/cryptouser.h b/include/uapi/linux/cryptouser.h index 11d21fce14d6..b4def5c630e7 100644 --- a/include/uapi/linux/cryptouser.h +++ b/include/uapi/linux/cryptouser.h @@ -31,7 +31,7 @@ enum { #define CRYPTO_MSG_MAX (__CRYPTO_MSG_MAX - 1) #define CRYPTO_NR_MSGTYPES (CRYPTO_MSG_MAX + 1 - CRYPTO_MSG_BASE) -#define CRYPTO_MAX_NAME CRYPTO_MAX_ALG_NAME +#define CRYPTO_MAX_NAME 64 /* Netlink message attributes. */ enum crypto_attr_type_t { @@ -53,9 +53,9 @@ enum crypto_attr_type_t { }; struct crypto_user_alg { - char cru_name[CRYPTO_MAX_ALG_NAME]; - char cru_driver_name[CRYPTO_MAX_ALG_NAME]; - char cru_module_name[CRYPTO_MAX_ALG_NAME]; + char cru_name[CRYPTO_MAX_NAME]; + char cru_driver_name[CRYPTO_MAX_NAME]; + char cru_module_name[CRYPTO_MAX_NAME]; __u32 cru_type; __u32 cru_mask; __u32 cru_refcnt; @@ -73,7 +73,7 @@ struct crypto_report_hash { }; struct crypto_report_cipher { - char type[CRYPTO_MAX_ALG_NAME]; + char type[CRYPTO_MAX_NAME]; unsigned int blocksize; unsigned int min_keysize; unsigned int max_keysize;