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Fix incorrect assumptions about the size of size_t

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Signed-off-by: Paul Elliott <paul.elliott@arm.com>
This commit is contained in:
Paul Elliott 2021-03-01 17:49:42 +00:00
parent f13a47bbb2
commit 86cb928e54
1 changed files with 4 additions and 2 deletions
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6
library/base64.c
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@ -113,7 +113,7 @@ static void mbedtls_base64_cond_assign(unsigned char * dest, const unsigned char
*/ */
static unsigned char mbedtls_base64_eq(size_t in_a, size_t in_b) static unsigned char mbedtls_base64_eq(size_t in_a, size_t in_b)
{ {
uint32_t difference = in_a ^ in_b; size_t difference = in_a ^ in_b;
/* MSVC has a warning about unary minus on unsigned integer types, /* MSVC has a warning about unary minus on unsigned integer types,
* but this is well-defined and precisely what we want to do here. */ * but this is well-defined and precisely what we want to do here. */
@ -128,7 +128,9 @@ static unsigned char mbedtls_base64_eq(size_t in_a, size_t in_b)
#pragma warning( pop ) #pragma warning( pop )
#endif #endif
difference >>= 31; /* cope with the varying size of size_t per platform */
difference >>= ( sizeof( difference ) * 8 - 1 );
return (unsigned char) ( 1 ^ difference ); return (unsigned char) ( 1 ^ difference );
} }