Provide getdelim and getline compat shims

These are portable implementations from NetBSD that are needed on
Windows and perhaps some other platforms with the new versions of
the mlkem tests.

8 files changed, 163 insertions, 1 deletions

diff --git a/.gitignore b/.gitignore
index 3c82386..18f99c1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -237,10 +237,14 @@ include/openssl/*.h
 
 /crypto/*
 !/crypto/Makefile.am.*
+!/crypto/compat/
+/crypto/compat/*
 !/crypto/compat/arc4random.h
 !/crypto/compat/b_win.c
 !/crypto/compat/explicit_bzero_win.c
 !/crypto/compat/freezero.c
+!/crypto/compat/getdelim.c
+!/crypto/compat/getline.c
 !/crypto/compat/getpagesize.c
 !/crypto/compat/posix_win.c
 !/crypto/compat/bsd_asprintf.c
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ebd8260..437570b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -214,6 +214,16 @@ if(HAVE_ASPRINTF)
         add_definitions(-DHAVE_ASPRINTF)
 endif()
 
+check_symbol_exists(getdelim "stdio.h" HAVE_GETDELIM)
+if(HAVE_GETDELIM)
+        add_definitions(-DHAVE_GETDELIM)
+endif()
+
+check_symbol_exists(getline "stdio.h" HAVE_GETLINE)
+if(HAVE_GETLINE)
+        add_definitions(-DHAVE_GETLINE)
+endif()
+
 check_symbol_exists(getopt "unistd.h" HAVE_GETOPT)
 if(HAVE_GETOPT)
         add_definitions(-DHAVE_GETOPT)
diff --git a/crypto/CMakeLists.txt b/crypto/CMakeLists.txt
index 7b3439d..92a10ba 100644
--- a/crypto/CMakeLists.txt
+++ b/crypto/CMakeLists.txt
@@ -607,6 +607,14 @@ if(NOT HAVE_FREEZERO)
         set(COMPAT_SRC ${COMPAT_SRC} compat/freezero.c)
 endif()
 
+if(NOT HAVE_GETDELIM)
+        set(COMPAT_SRC ${COMPAT_SRC} compat/getdelim.c)
+endif()
+
+if(NOT HAVE_GETLINE)
+        set(COMPAT_SRC ${COMPAT_SRC} compat/getline.c)
+endif()
+
 if(NOT HAVE_GETOPT)
         set(COMPAT_SRC ${COMPAT_SRC} compat/getopt_long.c)
 endif()
diff --git a/crypto/Makefile.am b/crypto/Makefile.am
index 06fde29..31fcffd 100644
--- a/crypto/Makefile.am
+++ b/crypto/Makefile.am
@@ -134,6 +134,14 @@ if !HAVE_FREEZERO
 libcompat_la_SOURCES += compat/freezero.c
 endif
 
+if !HAVE_GETDELIM
+libcompat_la_SOURCES += compat/getdelim.c
+endif
+
+if !HAVE_GETLINE
+libcompat_la_SOURCES += compat/getline.c
+endif
+
 if !HAVE_GETPAGESIZE
 libcompat_la_SOURCES += compat/getpagesize.c
 endif
diff --git a/crypto/compat/getdelim.c b/crypto/compat/getdelim.c
new file mode 100644
index 0000000..caec3f2
--- /dev/null
+++ b/crypto/compat/getdelim.c
@@ -0,0 +1,78 @@
+/*-
+ * Copyright (c) 2011 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Christos Zoulas.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifndef HAVE_GETDELIM
+
+ssize_t
+getdelim(char **buf, size_t *bufsiz, int delimiter, FILE *fp)
+{
+        char *ptr, *eptr;
+
+
+        if (*buf == NULL || *bufsiz == 0) {
+                *bufsiz = BUFSIZ;
+                if ((*buf = malloc(*bufsiz)) == NULL)
+                        return -1;
+        }
+
+        for (ptr = *buf, eptr = *buf + *bufsiz;;) {
+                int c = fgetc(fp);
+                if (c == -1) {
+                        if (feof(fp)) {
+                                ssize_t diff = (ssize_t)(ptr - *buf);
+                                if (diff != 0) {
+                                        *ptr = '\0';
+                                        return diff;
+                                }
+                        }
+                        return -1;
+                }
+                *ptr++ = c;
+                if (c == delimiter) {
+                        *ptr = '\0';
+                        return ptr - *buf;
+                }
+                if (ptr + 2 >= eptr) {
+                        char *nbuf;
+                        size_t nbufsiz = *bufsiz * 2;
+                        ssize_t d = ptr - *buf;
+                        if ((nbuf = realloc(*buf, nbufsiz)) == NULL)
+                                return -1;
+                        *buf = nbuf;
+                        *bufsiz = nbufsiz;
+                        eptr = nbuf + nbufsiz;
+                        ptr = nbuf + d;
+                }
+        }
+}
+
+#endif /* HAVE_GETDELIM */
diff --git a/crypto/compat/getline.c b/crypto/compat/getline.c
new file mode 100644
index 0000000..e6ecde0
--- /dev/null
+++ b/crypto/compat/getline.c
@@ -0,0 +1,40 @@
+/*-
+ * Copyright (c) 2011 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Christos Zoulas.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+
+#ifndef HAVE_GETLINE
+
+ssize_t
+getline(char **buf, size_t *bufsiz, FILE *fp)
+{
+        return getdelim(buf, bufsiz, '\n', fp);
+}
+
+#endif /* HAVE_GETLINE */
diff --git a/include/compat/stdio.h b/include/compat/stdio.h
index 2af8f3e..2ccdeeb 100644
--- a/include/compat/stdio.h
+++ b/include/compat/stdio.h
@@ -18,6 +18,18 @@
 #include_next <stdio.h>
 #endif
 
+#ifndef HAVE_GETDELIM
+#include <sys/types.h>
+#define getdelim libressl_getdelim
+ssize_t getdelim(char **buf, size_t *bufsiz, int delimiter, FILE *fp);
+#endif
+
+#ifndef HAVE_GETLINE
+#include <sys/types.h>
+#define getline libressl_getline
+ssize_t getline(char **buf, size_t *bufsiz, FILE *fp);
+#endif
+
 #ifndef HAVE_ASPRINTF
 #include <stdarg.h>
 #define vasprintf libressl_vasprintf
diff --git a/m4/check-libc.m4 b/m4/check-libc.m4
index 40df15b..8cb849b 100644
--- a/m4/check-libc.m4
+++ b/m4/check-libc.m4
@@ -7,7 +7,7 @@ AC_CHECK_HEADERS([netinet/ip.h], [], [],
 ])
 AC_HEADER_RESOLV
 # Check for general libc functions
-AC_CHECK_FUNCS([asprintf freezero memmem])
+AC_CHECK_FUNCS([asprintf freezero getdelim getline memmem])
 AC_CHECK_FUNCS([readpassphrase reallocarray recallocarray])
 AC_CHECK_FUNCS([strcasecmp strlcat strlcpy strndup strnlen strsep strtonum])
 AC_CHECK_FUNCS([timegm _mkgmtime timespecsub])
@@ -24,6 +24,8 @@ AC_CACHE_CHECK([for getpagesize], ac_cv_func_getpagesize, [
 ])
 AM_CONDITIONAL([HAVE_ASPRINTF], [test "x$ac_cv_func_asprintf" = xyes])
 AM_CONDITIONAL([HAVE_FREEZERO], [test "x$ac_cv_func_freezero" = xyes])
+AM_CONDITIONAL([HAVE_GETDELIM], [test "x$ac_cv_func_getdelim" = xyes])
+AM_CONDITIONAL([HAVE_GETLINE], [test "x$ac_cv_func_getline" = xyes])
 AM_CONDITIONAL([HAVE_GETPAGESIZE], [test "x$ac_cv_func_getpagesize" = xyes])
 AM_CONDITIONAL([HAVE_GETOPT], [test "x$ac_cv_func_getopt" = xyes])
 AM_CONDITIONAL([HAVE_MEMMEM], [test "x$ac_cv_func_memmem" = xyes])