commit 630148e67f0cd3d337308321f72f444ca4ef1c35
author Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com> Wed Aug 13 13:57:35 2025 +0200
committer Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com> Thu Aug 14 09:40:05 2025 +0200
tree dd0e5f2193260738823b8d79dcc2bed85f312bfc
parent 7dcfd7373170ef718863c0c61cda4ff3e5e25299

RSA: use constant-time modinv in deduce_crt()

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 f7ec35a..00aa79c 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -1924,9 +1924,9 @@
 /*
  * Modular inverse: X = A^-1 mod N with N odd (and A any range)
  */
-static int mbedtls_mpi_inv_mod_odd(mbedtls_mpi *X,
-                                   const mbedtls_mpi *A,
-                                   const mbedtls_mpi *N)
+int mbedtls_mpi_inv_mod_odd(mbedtls_mpi *X,
+                            const mbedtls_mpi *A,
+                            const mbedtls_mpi *N)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     mbedtls_mpi T, G;