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fix(mbedtls): bound public-key coordinate copy in esp ecp_check_pubkey

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This commit is contained in:
Ashish Sharma
2026-09-07 17:30:09 +08:00
parent 6c8da6754b
commit c5bc6acdc3
1 changed files with 4 additions and 3 deletions
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components/mbedtls/port/ecc/ecc_alt.c
+4 -3
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@@ -4,7 +4,6 @@
* SPDX-License-Identifier: Apache-2.0 * SPDX-License-Identifier: Apache-2.0
*/ */
#include <string.h>
#include "soc/hwcrypto_periph.h" #include "soc/hwcrypto_periph.h"
#include "ecc_impl.h" #include "ecc_impl.h"
#include "hal/ecc_ll.h" #include "hal/ecc_ll.h"
@@ -118,8 +117,10 @@ int mbedtls_ecp_check_pubkey( const mbedtls_ecp_group *grp,
mbedtls_platform_zeroize((void *)&point, sizeof(ecc_point_t)); mbedtls_platform_zeroize((void *)&point, sizeof(ecc_point_t));
memcpy(&point.x, pt->MBEDTLS_PRIVATE(X).MBEDTLS_PRIVATE(p), mbedtls_mpi_size(&pt->MBEDTLS_PRIVATE(X))); if (mbedtls_mpi_write_binary_le(&pt->MBEDTLS_PRIVATE(X), point.x, sizeof(point.x)) != 0 ||
memcpy(&point.y, pt->MBEDTLS_PRIVATE(Y).MBEDTLS_PRIVATE(p), mbedtls_mpi_size(&pt->MBEDTLS_PRIVATE(Y))); mbedtls_mpi_write_binary_le(&pt->MBEDTLS_PRIVATE(Y), point.y, sizeof(point.y)) != 0) {
return MBEDTLS_ERR_ECP_INVALID_KEY;
}
point.len = grp->pbits / 8; point.len = grp->pbits / 8;