From e71aeca2cab2f8c643cc0ef6cd247642057f724e Mon Sep 17 00:00:00 2001 From: Emilia Kasper Date: Thu, 17 Sep 2015 13:27:05 +0200 Subject: BUF_strndup: tidy Fix comment, add another overflow check, tidy style Reviewed-by: Matt Caswell (cherry picked from commit de8883e11befde31d9b6cfbbd1fc017c365e0bbf) --- crypto/buffer/buf_str.c | 14 +++++++------- crypto/buffer/buffer.h | 4 ++-- 2 files changed, 9 insertions(+), 9 deletions(-) diff --git a/crypto/buffer/buf_str.c b/crypto/buffer/buf_str.c index 61024cf..fa0d608 100644 --- a/crypto/buffer/buf_str.c +++ b/crypto/buffer/buf_str.c @@ -73,7 +73,7 @@ size_t BUF_strnlen(const char *str, size_t maxlen) char *BUF_strdup(const char *str) { if (str == NULL) - return (NULL); + return NULL; return BUF_strndup(str, strlen(str)); } @@ -82,17 +82,17 @@ char *BUF_strndup(const char *str, size_t siz) char *ret; if (str == NULL) - return (NULL); + return NULL; siz = BUF_strnlen(str, siz); if (siz >= INT_MAX) - return (NULL); + return NULL; ret = OPENSSL_malloc(siz + 1); if (ret == NULL) { BUFerr(BUF_F_BUF_STRNDUP, ERR_R_MALLOC_FAILURE); - return (NULL); + return NULL; } memcpy(ret, str, siz); @@ -105,13 +105,13 @@ void *BUF_memdup(const void *data, size_t siz) { void *ret; - if (data == NULL) - return (NULL); + if (data == NULL || siz >= INT_MAX) + return NULL; ret = OPENSSL_malloc(siz); if (ret == NULL) { BUFerr(BUF_F_BUF_MEMDUP, ERR_R_MALLOC_FAILURE); - return (NULL); + return NULL; } return memcpy(ret, data, siz); } diff --git a/crypto/buffer/buffer.h b/crypto/buffer/buffer.h index a05cee0..efd240a 100644 --- a/crypto/buffer/buffer.h +++ b/crypto/buffer/buffer.h @@ -88,8 +88,8 @@ size_t BUF_strnlen(const char *str, size_t maxlen); char *BUF_strdup(const char *str); /* - * Returns a pointer to a new string which is a duplicate of the string |str|, - * but guarantees to never read past the first |siz| bytes of |str|. + * Like strndup, but in addition, explicitly guarantees to never read past the + * first |siz| bytes of |str|. */ char *BUF_strndup(const char *str, size_t siz); -- 1.7.12.1