Fix hash buffer size in pkey programs
diff --git a/programs/pkey/rsa_sign_pss.c b/programs/pkey/rsa_sign_pss.c
index dd9386b..2b358c1 100644
--- a/programs/pkey/rsa_sign_pss.c
+++ b/programs/pkey/rsa_sign_pss.c
@@ -65,7 +65,7 @@
     mbedtls_pk_context pk;
     mbedtls_entropy_context entropy;
     mbedtls_ctr_drbg_context ctr_drbg;
-    unsigned char hash[20];
+    unsigned char hash[32];
     unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
     char filename[512];
     const char *pers = "rsa_sign_pss";