From 5fd83771641d15c418f747bd343ba6738d3875f7 Mon Sep 17 00:00:00 2001
From: Cameron Katri <me@cameronkatri.com>
Date: Sun, 9 May 2021 14:20:58 -0400
Subject: Import macOS userland

adv_cmds-176
basic_cmds-55
bootstrap_cmds-116.100.1
developer_cmds-66
diskdev_cmds-667.40.1
doc_cmds-53.60.1
file_cmds-321.40.3
mail_cmds-35
misc_cmds-34
network_cmds-606.40.1
patch_cmds-17
remote_cmds-63
shell_cmds-216.60.1
system_cmds-880.60.2
text_cmds-106
---
 text_cmds/sort/commoncrypto.c | 98 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 text_cmds/sort/commoncrypto.c

(limited to 'text_cmds/sort/commoncrypto.c')

diff --git a/text_cmds/sort/commoncrypto.c b/text_cmds/sort/commoncrypto.c
new file mode 100644
index 0000000..c7b3b8c
--- /dev/null
+++ b/text_cmds/sort/commoncrypto.c
@@ -0,0 +1,98 @@
+/* mdXhl.c
+ * ----------------------------------------------------------------------------
+ * "THE BEER-WARE LICENSE" (Revision 42):
+ * <phk@FreeBSD.org> wrote this file.  As long as you retain this notice you
+ * can do whatever you want with this stuff. If we meet some day, and you think
+ * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
+ * ----------------------------------------------------------------------------
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: head/lib/libmd/mdXhl.c 294037 2016-01-14 21:08:23Z jtl $");
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "commoncrypto.h"
+
+#define LENGTH CC_MD5_DIGEST_LENGTH
+
+char *MD5FileChunk(const char *, char *, off_t, off_t);
+
+char *
+MD5End(CC_MD5_CTX *ctx, char *buf)
+{
+	int i;
+	unsigned char digest[LENGTH];
+	static const char hex[]="0123456789abcdef";
+
+	if (!buf)
+		buf = malloc(2*LENGTH + 1);
+	if (!buf)
+		return 0;
+	CC_MD5_Final(digest, ctx);
+	for (i = 0; i < LENGTH; i++) {
+		buf[i+i] = hex[digest[i] >> 4];
+		buf[i+i+1] = hex[digest[i] & 0x0f];
+	}
+	buf[i+i] = '\0';
+	return buf;
+}
+
+char *
+MD5File(const char *filename, char *buf)
+{
+	return (MD5FileChunk(filename, buf, 0, 0));
+}
+
+char *
+MD5FileChunk(const char *filename, char *buf, off_t ofs, off_t len)
+{
+	unsigned char buffer[16*1024];
+	CC_MD5_CTX ctx;
+	int fd, readrv, e;
+	off_t remain;
+
+	if (len < 0) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	CC_MD5_Init(&ctx);
+	fd = open(filename, O_RDONLY);
+	if (fd < 0)
+		return NULL;
+	if (ofs != 0) {
+		errno = 0;
+		if (lseek(fd, ofs, SEEK_SET) != ofs ||
+		    (ofs == -1 && errno != 0)) {
+			readrv = -1;
+			goto error;
+		}
+	}
+	remain = len;
+	readrv = 0;
+	while (len == 0 || remain > 0) {
+		if (len == 0 || remain > (off_t)sizeof(buffer))
+			readrv = read(fd, buffer, sizeof(buffer));
+		else
+			readrv = read(fd, buffer, remain);
+		if (readrv <= 0) 
+			break;
+		CC_MD5_Update(&ctx, buffer, readrv);
+		remain -= readrv;
+	} 
+error:
+	e = errno;
+	close(fd);
+	errno = e;
+	if (readrv < 0)
+		return NULL;
+	return (MD5End(&ctx, buf));
+}
-- 
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