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Ensure blocksize is compile-time const when DES not present

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Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman 2024-03-06 11:38:49 +00:00
parent 7f86d356b1
commit 5ba2b2b8cc
1 changed files with 7 additions and 3 deletions
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10
library/cmac.c
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@ -56,16 +56,20 @@ static int cmac_multiply_by_u(unsigned char *output,
size_t blocksize) size_t blocksize)
{ {
const unsigned char R_128 = 0x87; const unsigned char R_128 = 0x87;
const unsigned char R_64 = 0x1B;
unsigned char R_n, mask; unsigned char R_n, mask;
uint32_t overflow = 0x00; uint32_t overflow = 0x00;
int i; int i;
if (blocksize == MBEDTLS_AES_BLOCK_SIZE) { if (blocksize == MBEDTLS_AES_BLOCK_SIZE) {
R_n = R_128; R_n = R_128;
} else if (blocksize == MBEDTLS_DES3_BLOCK_SIZE) { }
#if defined(MBEDTLS_DES_C)
else if (blocksize == MBEDTLS_DES3_BLOCK_SIZE) {
const unsigned char R_64 = 0x1B;
R_n = R_64; R_n = R_64;
} else { }
#endif
else {
return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA; return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
} }