Update tf-psa-crypto/drivers/builtin/src/ecp.c

Signed-off-by: Minos Galanakis <[email protected]>
Mbed-TLS · Jan 23, 2025 · f4b1a06 · f4b1a06
1 parent feb09e2
commit f4b1a06
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/builtin/src/ecp.c b/drivers/builtin/src/ecp.c
@@ -3078,7 +3078,7 @@ int mbedtls_ecp_check_privkey(const mbedtls_ecp_group *grp,
         /* see RFC 7748 sec. 5 para. 5 */
         if (mbedtls_mpi_get_bit(d, 0) != 0 ||
             mbedtls_mpi_get_bit(d, 1) != 0 ||
-            mbedtls_mpi_bitlen(d) - 1 != grp->nbits) {  /* mbedtls_mpi_bitlen is one-based! */
+            mbedtls_mpi_bitlen(d) != grp->nbits + 1) {  /* mbedtls_mpi_bitlen is one-based! */
             return MBEDTLS_ERR_ECP_INVALID_KEY;
         }