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| author | Lasse Collin <lasse.collin@tukaani.org> | 2011-05-21 15:08:44 +0300 |
|---|---|---|
| committer | Lasse Collin <lasse.collin@tukaani.org> | 2011-05-21 15:08:44 +0300 |
| commit | b94aa0c8380cdb18cddb33440d625474c16643cf (patch) | |
| tree | 41dc7226f490e7aaa3b32f701e2b3b4fac0afb3f /configure.ac | |
| parent | Don't use clockid_t in mythread.h when clock_gettime() isn't available. (diff) | |
| download | xz-b94aa0c8380cdb18cddb33440d625474c16643cf.tar.xz | |
liblzma: Try to use SHA-256 from the operating system.
If the operating system libc or other base libraries
provide SHA-256, use that instead of our own copy.
Note that this doesn't use OpenSSL or libgcrypt or
such libraries to avoid creating dependencies to
other packages.
This supports at least FreeBSD, NetBSD, OpenBSD, Solaris,
MINIX, and Darwin. They all provide similar but not
identical SHA-256 APIs; everyone is a little different.
Thanks to Wim Lewis for the original patch, improvements,
and testing.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 54 |
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: |