aboutsummaryrefslogtreecommitdiff
path: root/configure.ac
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--configure.ac54
1 files changed, 54 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 7a122d71..a75c520b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -535,6 +535,60 @@ TUKLIB_PHYSMEM
TUKLIB_CPUCORES
TUKLIB_MBSTR
+# Check for system-provided SHA-256. At least the following is supported:
+#
+# OS Headers Library Type Function
+# FreeBSD sys/types.h + sha256.h libmd SHA256_CTX SHA256_Init
+# NetBSD sys/types.h + sha2.h SHA256_CTX SHA256_Init
+# OpenBSD sys/types.h + sha2.h SHA2_CTX SHA256Init
+# Solaris sys/types.h + sha2.h libmd SHA256_CTX SHA256Init
+# MINIX 3 sys/types.h + minix/sha2.h libutil SHA256_CTX SHA256_Init
+# Darwin CommonCrypto/CommonDigest.h CC_SHA256_CTX CC_SHA256_Init
+#
+# Note that Darwin's CC_SHA256_Update takes buffer size as uint32_t instead
+# of size_t.
+#
+# We don't check for e.g. OpenSSL or libgcrypt because we don't want
+# to introduce dependencies to other packages by default. Maybe such
+# libraries could be supported via additional configure options though.
+#
+if test "x$enable_check_sha256" = "xyes"; then
+ # Test for Common Crypto before others, because Darwin has sha256.h
+ # too and we don't want to use that, because on older versions it
+ # uses OpenSSL functions, whose SHA256_Init is not guaranteed to
+ # succeed.
+ sha256_header_found=no
+ AC_CHECK_HEADERS(
+ [CommonCrypto/CommonDigest.h sha256.h sha2.h minix/sha2.h],
+ [sha256_header_found=yes ; break])
+ if test "x$sha256_header_found" = xyes; then
+ AC_CHECK_TYPES([CC_SHA256_CTX, SHA256_CTX, SHA2_CTX], [], [],
+ [[#ifdef HAVE_SYS_TYPES
+ # include <sys/types.h>
+ #endif
+ #ifdef HAVE_COMMONCRYPTO_COMMONDIGEST_H
+ # include <CommonCrypto/CommonDigest.h>
+ #endif
+ #ifdef HAVE_SHA256_H
+ # include <sha256.h>
+ #endif
+ #ifdef HAVE_SHA2_H
+ # include <sha2.h>
+ #endif
+ #ifdef HAVE_MINIX_SHA2_H
+ # include <minix/sha2.h>
+ #endif]])
+ AC_SEARCH_LIBS([SHA256_Init], [md util])
+ AC_SEARCH_LIBS([SHA256Init], [md])
+ AC_CHECK_FUNCS([CC_SHA256_Init SHA256_Init SHA256Init],
+ [break])
+ fi
+fi
+AM_CONDITIONAL([COND_INTERNAL_SHA256],
+ [test "x$ac_cv_func_SHA256_Init" != xyes \
+ && test "x$ac_cv_func_SHA256Init" != xyes \
+ && test "x$ac_cv_func_CC_SHA256_Init" != xyes])
+
###############################################################################
# If using GCC, set some additional AM_CFLAGS: