Check return value of EVP_EncodeUpdate() in b64_write().

ok jsing

1 files changed, 4 insertions, 3 deletions

diff --git a/src/lib/libcrypto/evp/bio_b64.c b/src/lib/libcrypto/evp/bio_b64.c
index a13d26a884..82aaa8bf7a 100644
--- a/src/lib/libcrypto/evp/bio_b64.c
+++ b/src/lib/libcrypto/evp/bio_b64.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: bio_b64.c,v 1.21 2018/05/02 15:51:41 tb Exp $ */
+/* $OpenBSD: bio_b64.c,v 1.22 2018/08/24 19:47:25 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -430,9 +430,10 @@ b64_write(BIO *b, const char *in, int inl)
                                 ret += n;
                         }
                 } else {
-                        EVP_EncodeUpdate(&(ctx->base64),
+                        if (!EVP_EncodeUpdate(&(ctx->base64),
                             (unsigned char *)ctx->buf, &ctx->buf_len,
-                            (unsigned char *)in, n);
+                            (unsigned char *)in, n))
+                                return ((ret == 0) ? -1 : ret);
                         OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf));
                         OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
                         ret += n;