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Add MBEDTLS_ECP_MAX_MPI define

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Add MBEDTLS_ECP_MAX_MPI define to determine the maximum
number of bytes for the biggest Elliptic curve in bignum
representation.

Signed-off-by: Waleed Elmelegy <waleed.elmelegy@arm.com>
This commit is contained in:
Waleed Elmelegy
2024-11-13 13:20:20 +00:00
parent a47b82c20a
commit 8666b0fbc8
2 changed files with 4 additions and 2 deletions
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4
tf-psa-crypto/core/psa_crypto.c
View File

@@ -8184,7 +8184,7 @@ psa_status_t psa_generate_key_iop_complete(
{ {
#if defined(MBEDTLS_ECP_RESTARTABLE) #if defined(MBEDTLS_ECP_RESTARTABLE)
psa_status_t status; psa_status_t status;
uint8_t key_data[MBEDTLS_ECP_MAX_BYTES] = { 0 }; uint8_t key_data[MBEDTLS_ECP_MAX_MPI] = { 0 };
size_t key_len = 0; size_t key_len = 0;
if (operation->id == 0 || operation->error_occurred) { if (operation->id == 0 || operation->error_occurred) {
@@ -8210,7 +8210,7 @@ exit:
psa_generate_key_iop_abort_internal(operation); psa_generate_key_iop_abort_internal(operation);
} }
mbedtls_platform_zeroize(key_data, MBEDTLS_ECP_MAX_BYTES); mbedtls_platform_zeroize(key_data, sizeof(key_data));
return status; return status;
#else #else
(void) operation; (void) operation;

2
tf-psa-crypto/drivers/builtin/include/mbedtls/ecp.h
View File

@@ -345,6 +345,8 @@ mbedtls_ecp_group;
#define MBEDTLS_ECP_MAX_BYTES ((MBEDTLS_ECP_MAX_BITS + 7) / 8) #define MBEDTLS_ECP_MAX_BYTES ((MBEDTLS_ECP_MAX_BITS + 7) / 8)
#define MBEDTLS_ECP_MAX_PT_LEN (2 * MBEDTLS_ECP_MAX_BYTES + 1) #define MBEDTLS_ECP_MAX_PT_LEN (2 * MBEDTLS_ECP_MAX_BYTES + 1)
#define MBEDTLS_ECP_MAX_MPI ((MBEDTLS_ECP_MAX_BYTES + sizeof(mbedtls_mpi_uint)) & \
~(sizeof(mbedtls_mpi_uint)-1))
#if defined(MBEDTLS_ECP_RESTARTABLE) #if defined(MBEDTLS_ECP_RESTARTABLE)