commit 9e1c532847af26ea6504720c6755b668b4b1d0da
author Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com> Wed Aug 13 14:14:19 2025 +0200
committer Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com> Thu Aug 14 09:40:05 2025 +0200
tree 5c7038a5e4e91438b6d572238dfebffb9fcfda5e
parent a4bf680e92dc5be758a730daaad7bf6eac5d7353

RSA: use CT gcd-modinv in deduce_private_exponent()

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>

library/bignum.c

diff --git a/library/bignum.c b/library/bignum.c
index 00aa79c..f6b8f99 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -1963,9 +1963,9 @@
  *
  * Return MBEDTLS_ERR_MPI_NOT_ACCEPTABLE if the inverse doesn't exist.
  */
-static int mbedtls_mpi_inv_mod_even_in_range(mbedtls_mpi *X,
-                                             mbedtls_mpi const *A,
-                                             mbedtls_mpi const *N)
+int mbedtls_mpi_inv_mod_even_in_range(mbedtls_mpi *X,
+                                      mbedtls_mpi const *A,
+                                      mbedtls_mpi const *N)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     mbedtls_mpi I, G;