From c8cc6f1773ff370bb14bb963e2f632eef6d6a3c2 Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Thu, 12 May 2022 23:22:42 +0200
Subject: [PATCH] libs/srtp/crypto/hash/hmac_ossl.c: fix build with libressl >=
 3.5.0

Fix the following build failure with libressl >= 3.5.0:

crypto/hash/hmac_ossl.c: In function 'srtp_hmac_alloc':
crypto/hash/hmac_ossl.c:88:55: error: invalid application of 'sizeof' to incomplete type 'HMAC_CTX' {aka 'struct hmac_ctx_st'}
   88 |         pointer = (uint8_t *)srtp_crypto_alloc(sizeof(HMAC_CTX) +
      |                                                       ^~~~~~~~
crypto/hash/hmac_ossl.c:97:9: warning: implicit declaration of function 'HMAC_CTX_init'; did you mean 'HMAC_CTX_new'? [-Wimplicit-function-declaration]
   97 |         HMAC_CTX_init(new_hmac_ctx);
      |         ^~~~~~~~~~~~~
      |         HMAC_CTX_new
crypto/hash/hmac_ossl.c: In function 'srtp_hmac_dealloc':
crypto/hash/hmac_ossl.c:130:5: warning: implicit declaration of function 'HMAC_CTX_cleanup' [-Wimplicit-function-declaration]
  130 |     HMAC_CTX_cleanup(hmac_ctx);
      |     ^~~~~~~~~~~~~~~~
crypto/hash/hmac_ossl.c:133:40: error: invalid application of 'sizeof' to incomplete type 'HMAC_CTX' {aka 'struct hmac_ctx_st'}
  133 |     octet_string_set_to_zero(a, sizeof(HMAC_CTX) + sizeof(srtp_auth_t));
      |                                        ^~~~~~~~

Fixes:
 - http://autobuild.buildroot.org/results/e696ead9ffffa5bb80928d75607bfbb9b263d3c6

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
---
 libs/srtp/crypto/hash/hmac_ossl.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libs/srtp/crypto/hash/hmac_ossl.c b/libs/srtp/crypto/hash/hmac_ossl.c
index 8146438b05..6730cbb35c 100644
--- a/libs/srtp/crypto/hash/hmac_ossl.c
+++ b/libs/srtp/crypto/hash/hmac_ossl.c
@@ -79,7 +79,8 @@ static srtp_err_status_t srtp_hmac_alloc(srtp_auth_t **a,
 
 /* OpenSSL 1.1.0 made HMAC_CTX an opaque structure, which must be allocated
    using HMAC_CTX_new.  But this function doesn't exist in OpenSSL 1.0.x. */
-#if OPENSSL_VERSION_NUMBER < 0x10100000L || LIBRESSL_VERSION_NUMBER
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || \
+	(defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER < 0x30500000L)
     {
         /* allocate memory for auth and HMAC_CTX structures */
         uint8_t *pointer;
@@ -125,7 +126,8 @@ static srtp_err_status_t srtp_hmac_dealloc(srtp_auth_t *a)
 
     hmac_ctx = (HMAC_CTX *)a->state;
 
-#if OPENSSL_VERSION_NUMBER < 0x10100000L || LIBRESSL_VERSION_NUMBER
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || \
+	(defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER < 0x30500000L)
     HMAC_CTX_cleanup(hmac_ctx);
 
     /* zeroize entire state*/
-- 
2.35.1