From 3a3b161e9629ffcece3909c04a7369a49e8c44cc Mon Sep 17 00:00:00 2001 From: Gilles Peskine Date: Tue, 21 Jan 2020 16:56:03 +0100 Subject: [PATCH] Add missing return code check on call to mbedtls_md() --- library/x509write_csr.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/library/x509write_csr.c b/library/x509write_csr.c index b65a11c6a..7406a9754 100644 --- a/library/x509write_csr.c +++ b/library/x509write_csr.c @@ -226,7 +226,9 @@ int mbedtls_x509write_csr_der( mbedtls_x509write_csr *ctx, unsigned char *buf, s /* * Prepare signature */ - mbedtls_md( mbedtls_md_info_from_type( ctx->md_alg ), c, len, hash ); + ret = mbedtls_md( mbedtls_md_info_from_type( ctx->md_alg ), c, len, hash ); + if( ret != 0 ) + return( ret ); if( ( ret = mbedtls_pk_sign( ctx->key, ctx->md_alg, hash, 0, sig, &sig_len, f_rng, p_rng ) ) != 0 )