101 lines
3.5 KiB
Plaintext
101 lines
3.5 KiB
Plaintext
dnl escape "$0x" below using the m4 quadrigaph @S|@, and escape it again with a \ for the shell.
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AC_DEFUN([SECP_64BIT_ASM_CHECK],[
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AC_MSG_CHECKING(for x86_64 assembly availability)
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <stdint.h>]],[[
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uint64_t a = 11, tmp;
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__asm__ __volatile__("movq \@S|@0x100000000,%1; mulq %%rsi" : "+a"(a) : "S"(tmp) : "cc", "%rdx");
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]])],[has_64bit_asm=yes],[has_64bit_asm=no])
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AC_MSG_RESULT([$has_64bit_asm])
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])
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dnl
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AC_DEFUN([SECP_OPENSSL_CHECK],[
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has_libcrypto=no
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m4_ifdef([PKG_CHECK_MODULES],[
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PKG_CHECK_MODULES([CRYPTO], [libcrypto], [has_libcrypto=yes],[has_libcrypto=no])
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if test x"$has_libcrypto" = x"yes"; then
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TEMP_LIBS="$LIBS"
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LIBS="$LIBS $CRYPTO_LIBS"
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AC_CHECK_LIB(crypto, main,[AC_DEFINE(HAVE_LIBCRYPTO,1,[Define this symbol if libcrypto is installed])],[has_libcrypto=no])
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LIBS="$TEMP_LIBS"
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fi
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])
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if test x$has_libcrypto = xno; then
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AC_CHECK_HEADER(openssl/crypto.h,[
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AC_CHECK_LIB(crypto, main,[
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has_libcrypto=yes
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CRYPTO_LIBS=-lcrypto
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AC_DEFINE(HAVE_LIBCRYPTO,1,[Define this symbol if libcrypto is installed])
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])
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])
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LIBS=
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fi
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if test x"$has_libcrypto" = x"yes" && test x"$has_openssl_ec" = x; then
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AC_MSG_CHECKING(for EC functions in libcrypto)
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CPPFLAGS_TEMP="$CPPFLAGS"
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CPPFLAGS="$CRYPTO_CPPFLAGS $CPPFLAGS"
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <openssl/bn.h>
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#include <openssl/ec.h>
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#include <openssl/ecdsa.h>
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#include <openssl/obj_mac.h>]],[[
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# if OPENSSL_VERSION_NUMBER < 0x10100000L
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void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps) {(void)sig->r; (void)sig->s;}
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# endif
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unsigned int zero = 0;
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const unsigned char *zero_ptr = (unsigned char*)&zero;
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EC_KEY_free(EC_KEY_new_by_curve_name(NID_secp256k1));
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EC_KEY *eckey = EC_KEY_new();
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EC_GROUP *group = EC_GROUP_new_by_curve_name(NID_secp256k1);
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EC_KEY_set_group(eckey, group);
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ECDSA_sign(0, NULL, 0, NULL, &zero, eckey);
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ECDSA_verify(0, NULL, 0, NULL, 0, eckey);
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o2i_ECPublicKey(&eckey, &zero_ptr, 0);
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d2i_ECPrivateKey(&eckey, &zero_ptr, 0);
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EC_KEY_check_key(eckey);
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EC_KEY_free(eckey);
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EC_GROUP_free(group);
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ECDSA_SIG *sig_openssl;
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sig_openssl = ECDSA_SIG_new();
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d2i_ECDSA_SIG(&sig_openssl, &zero_ptr, 0);
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i2d_ECDSA_SIG(sig_openssl, NULL);
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ECDSA_SIG_get0(sig_openssl, NULL, NULL);
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ECDSA_SIG_free(sig_openssl);
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const BIGNUM *bignum = BN_value_one();
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BN_is_negative(bignum);
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BN_num_bits(bignum);
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if (sizeof(zero) >= BN_num_bytes(bignum)) {
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BN_bn2bin(bignum, (unsigned char*)&zero);
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}
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]])],[has_openssl_ec=yes],[has_openssl_ec=no])
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AC_MSG_RESULT([$has_openssl_ec])
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CPPFLAGS="$CPPFLAGS_TEMP"
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fi
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])
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AC_DEFUN([SECP_VALGRIND_CHECK],[
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if test x"$has_valgrind" != x"yes"; then
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CPPFLAGS_TEMP="$CPPFLAGS"
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CPPFLAGS="$VALGRIND_CPPFLAGS $CPPFLAGS"
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AC_CHECK_HEADER([valgrind/memcheck.h], [has_valgrind=yes; AC_DEFINE(HAVE_VALGRIND,1,[Define this symbol if valgrind is installed])])
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fi
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])
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dnl SECP_TRY_APPEND_CFLAGS(flags, VAR)
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dnl Append flags to VAR if CC accepts them.
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AC_DEFUN([SECP_TRY_APPEND_CFLAGS], [
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AC_MSG_CHECKING([if ${CC} supports $1])
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SECP_TRY_APPEND_CFLAGS_saved_CFLAGS="$CFLAGS"
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CFLAGS="$1 $CFLAGS"
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])], [flag_works=yes], [flag_works=no])
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AC_MSG_RESULT($flag_works)
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CFLAGS="$SECP_TRY_APPEND_CFLAGS_saved_CFLAGS"
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if test x"$flag_works" = x"yes"; then
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$2="$$2 $1"
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fi
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unset flag_works
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AC_SUBST($2)
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])
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