diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 170 |
1 files changed, 79 insertions, 91 deletions
diff --git a/configure.ac b/configure.ac index 4c7da5d76a..b722854195 100644 --- a/configure.ac +++ b/configure.ac @@ -39,8 +39,6 @@ AC_ARG_ENABLE(static-zlib, AS_HELP_STRING(--enable-static-zlib, Link against a static zlib library. Requires --with-zlib-dir)) AC_ARG_ENABLE(static-tor, AS_HELP_STRING(--enable-static-tor, Create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir)) -AC_ARG_ENABLE(curve25519, - AS_HELP_STRING(--disable-curve25519, Build Tor with no curve25519 elliptic-curve crypto support)) AC_ARG_ENABLE(unittests, AS_HELP_STRING(--disable-unittests, [Don't build unit tests for Tor. Risky!])) AC_ARG_ENABLE(coverage, @@ -765,101 +763,92 @@ dnl ============================================================ dnl We need an implementation of curve25519. dnl set these defaults. -have_a_curve25519=no build_curve25519_donna=no build_curve25519_donna_c64=no use_curve25519_donna=no use_curve25519_nacl=no CURVE25519_LIBS= -if test x$enable_curve25519 != xno; then - - dnl The best choice is using curve25519-donna-c64, but that requires - dnl that we - AC_CACHE_CHECK([whether we can use curve25519-donna-c64], - tor_cv_can_use_curve25519_donna_c64, - [AC_RUN_IFELSE( - [AC_LANG_PROGRAM([dnl - #include <stdint.h> - typedef unsigned uint128_t __attribute__((mode(TI))); - int func(uint64_t a, uint64_t b) { - uint128_t c = ((uint128_t)a) * b; - int ok = ((uint64_t)(c>>96)) == 522859 && - (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L && - (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L && - (((uint64_t)(c))&0xffffffffL) == 0; - return ok; - } - ], [dnl - int ok = func( ((uint64_t)2000000000) * 1000000000, - ((uint64_t)1234567890) << 24); - return !ok; - ])], - [tor_cv_can_use_curve25519_donna_c64=yes], - [tor_cv_can_use_curve25519_donna_c64=no], - [AC_LINK_IFELSE( - [AC_LANG_PROGRAM([dnl - #include <stdint.h> - typedef unsigned uint128_t __attribute__((mode(TI))); - int func(uint64_t a, uint64_t b) { - uint128_t c = ((uint128_t)a) * b; - int ok = ((uint64_t)(c>>96)) == 522859 && - (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L && - (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L && - (((uint64_t)(c))&0xffffffffL) == 0; - return ok; - } - ], [dnl - int ok = func( ((uint64_t)2000000000) * 1000000000, - ((uint64_t)1234567890) << 24); - return !ok; - ])], - [tor_cv_can_use_curve25519_donna_c64=cross], - [tor_cv_can_use_curve25519_donna_c64=no])])]) - - AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \ - nacl/crypto_scalarmult_curve25519.h]) - - AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation], - tor_cv_can_use_curve25519_nacl, - [tor_saved_LIBS="$LIBS" - LIBS="$LIBS -lnacl" - AC_LINK_IFELSE( - [AC_LANG_PROGRAM([dnl - #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H - #include <crypto_scalarmult_curve25519.h> - #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H) - #include <nacl/crypto_scalarmult_curve25519.h> - #endif - #ifdef crypto_scalarmult_curve25519_ref_BYTES - #error Hey, this is the reference implementation! That's not fast. - #endif - ], [ - unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c); - ])], [tor_cv_can_use_curve25519_nacl=yes], - [tor_cv_can_use_curve25519_nacl=no]) - LIBS="$tor_saved_LIBS" ]) - - dnl Okay, now we need to figure out which one to actually use. Fall back - dnl to curve25519-donna.c - - if test x$tor_cv_can_use_curve25519_donna_c64 != xno; then - build_curve25519_donna_c64=yes - use_curve25519_donna=yes - elif test x$tor_cv_can_use_curve25519_nacl = xyes; then - use_curve25519_nacl=yes - CURVE25519_LIBS=-lnacl - else - build_curve25519_donna=yes - use_curve25519_donna=yes - fi - have_a_curve25519=yes -fi +dnl The best choice is using curve25519-donna-c64, but that requires +dnl that we +AC_CACHE_CHECK([whether we can use curve25519-donna-c64], + tor_cv_can_use_curve25519_donna_c64, + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM([dnl + #include <stdint.h> + typedef unsigned uint128_t __attribute__((mode(TI))); + int func(uint64_t a, uint64_t b) { + uint128_t c = ((uint128_t)a) * b; + int ok = ((uint64_t)(c>>96)) == 522859 && + (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L && + (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L && + (((uint64_t)(c))&0xffffffffL) == 0; + return ok; + } + ], [dnl + int ok = func( ((uint64_t)2000000000) * 1000000000, + ((uint64_t)1234567890) << 24); + return !ok; + ])], + [tor_cv_can_use_curve25519_donna_c64=yes], + [tor_cv_can_use_curve25519_donna_c64=no], + [AC_LINK_IFELSE( + [AC_LANG_PROGRAM([dnl + #include <stdint.h> + typedef unsigned uint128_t __attribute__((mode(TI))); + int func(uint64_t a, uint64_t b) { + uint128_t c = ((uint128_t)a) * b; + int ok = ((uint64_t)(c>>96)) == 522859 && + (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L && + (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L && + (((uint64_t)(c))&0xffffffffL) == 0; + return ok; + } + ], [dnl + int ok = func( ((uint64_t)2000000000) * 1000000000, + ((uint64_t)1234567890) << 24); + return !ok; + ])], + [tor_cv_can_use_curve25519_donna_c64=cross], + [tor_cv_can_use_curve25519_donna_c64=no])])]) + +AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \ + nacl/crypto_scalarmult_curve25519.h]) + +AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation], + tor_cv_can_use_curve25519_nacl, + [tor_saved_LIBS="$LIBS" + LIBS="$LIBS -lnacl" + AC_LINK_IFELSE( + [AC_LANG_PROGRAM([dnl + #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H + #include <crypto_scalarmult_curve25519.h> + #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H) + #include <nacl/crypto_scalarmult_curve25519.h> + #endif + #ifdef crypto_scalarmult_curve25519_ref_BYTES + #error Hey, this is the reference implementation! That's not fast. + #endif + ], [ + unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c); + ])], [tor_cv_can_use_curve25519_nacl=yes], + [tor_cv_can_use_curve25519_nacl=no]) + LIBS="$tor_saved_LIBS" ]) + + dnl Okay, now we need to figure out which one to actually use. Fall back + dnl to curve25519-donna.c + + if test x$tor_cv_can_use_curve25519_donna_c64 != xno; then + build_curve25519_donna_c64=yes + use_curve25519_donna=yes + elif test x$tor_cv_can_use_curve25519_nacl = xyes; then + use_curve25519_nacl=yes + CURVE25519_LIBS=-lnacl + else + build_curve25519_donna=yes + use_curve25519_donna=yes + fi -if test x$have_a_curve25519 = xyes; then - AC_DEFINE(CURVE25519_ENABLED, 1, - [Defined if we have a curve25519 implementation]) -fi if test x$use_curve25519_donna = xyes; then AC_DEFINE(USE_CURVE25519_DONNA, 1, [Defined if we should use an internal curve25519_donna{,_c64} implementation]) @@ -870,7 +859,6 @@ if test x$use_curve25519_nacl = xyes; then fi AM_CONDITIONAL(BUILD_CURVE25519_DONNA, test x$build_curve25519_donna = xyes) AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64, test x$build_curve25519_donna_c64 = xyes) -AM_CONDITIONAL(CURVE25519_ENABLED, test x$have_a_curve25519 = xyes) AC_SUBST(CURVE25519_LIBS) dnl Make sure to enable support for large off_t if available. |