From e8b8ecd2f761430dd2e2c74505974b429fe6b40f Mon Sep 17 00:00:00 2001
From: Carlos Santos <casantos@datacom.com.br>
Date: Wed, 14 Nov 2018 23:31:25 -0200
Subject: [PATCH] ESYS: Fix build with LibreSSL

RAND_bytes() is declared in rand.h. Also, LibreSSL does not provide OAEP
macros EVP_PKEY_CTX_set0_rsa_oaep_label and EVP_PKEY_CTX_set_rsa_oaep_md
so use them conditionally.

Signed-off-by: Carlos Santos <casantos@datacom.com.br>
---
 src/tss2-esys/esys_crypto_ossl.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/tss2-esys/esys_crypto_ossl.c b/src/tss2-esys/esys_crypto_ossl.c
index 43088f4a..6c0c76fe 100644
--- a/src/tss2-esys/esys_crypto_ossl.c
+++ b/src/tss2-esys/esys_crypto_ossl.c
@@ -10,6 +10,7 @@
 #include <openssl/aes.h>
 #include <openssl/rsa.h>
 #include <openssl/engine.h>
+#include <openssl/rand.h>
 #include <stdio.h>
 
 #include "tss2_esys.h"
@@ -660,6 +661,8 @@ iesys_cryptossl_pk_encrypt(TPM2B_PUBLIC * pub_tpm_key,
                    "Could not set RSA passing.", cleanup);
     }
 
+/* LibreSSL does not provide these OAEP functions */
+#ifdef EVP_PKEY_CTX_set0_rsa_oaep_label
     if (1 != EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, label, strlen(label)+1)) {
         goto_error(r, TSS2_ESYS_RC_GENERAL_FAILURE,
                    "Could not set RSA label.", cleanup);
@@ -669,6 +672,9 @@ iesys_cryptossl_pk_encrypt(TPM2B_PUBLIC * pub_tpm_key,
         goto_error(r, TSS2_ESYS_RC_GENERAL_FAILURE,
                    "Could not set hash algorithm.", cleanup);
     }
+#else
+    (void) label;
+#endif
 
     /* Determine out size */
     if (1 != EVP_PKEY_encrypt(ctx, NULL, out_size, in_buffer, in_size)) {
-- 
2.19.1