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Allocate the right amount of memory

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Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
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Gabor Mezei 2023-04-26 15:22:11 +02:00
parent fead53311b
commit 19c6f47dbc
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GPG key ID: FEE76C0CF8C6267D
1 changed files with 7 additions and 7 deletions
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14
library/ecp_curves.c
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@ -5538,19 +5538,19 @@ static inline int ecp_mod_koblitz(mbedtls_mpi_uint *X,
{ {
int ret = 0; int ret = 0;
size_t R_limbs = P_KOBLITZ_R;
size_t M_limbs = X_limbs + R_limbs + adjust;
mbedtls_mpi_uint *M = mbedtls_calloc(M_limbs, ciL);
if (M == NULL) {
return MBEDTLS_ERR_ECP_ALLOC_FAILED;
}
size_t A1_limbs = X_limbs - (P_limbs - adjust); size_t A1_limbs = X_limbs - (P_limbs - adjust);
if (A1_limbs > P_limbs + adjust) { if (A1_limbs > P_limbs + adjust) {
A1_limbs = P_limbs + adjust; A1_limbs = P_limbs + adjust;
} }
mbedtls_mpi_uint *A1 = mbedtls_calloc(A1_limbs, ciL); mbedtls_mpi_uint *A1 = mbedtls_calloc(A1_limbs, ciL);
if (A1 == NULL) { if (A1 == NULL) {
return MBEDTLS_ERR_ECP_ALLOC_FAILED;
}
size_t R_limbs = P_KOBLITZ_R;
size_t M_limbs = A1_limbs + R_limbs;
mbedtls_mpi_uint *M = mbedtls_calloc(M_limbs, ciL);
if (M == NULL) {
ret = MBEDTLS_ERR_ECP_ALLOC_FAILED; ret = MBEDTLS_ERR_ECP_ALLOC_FAILED;
goto cleanup; goto cleanup;
} }