X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/80e2389990082500d76eb566d4946be3e786c3ef..d8f41ccd20de16f8ebe2ccc84d47bf1cb2b26bbb:/Security/libsecurity_cdsa_utils/lib/cuFileIo.c

diff --git a/Security/libsecurity_cdsa_utils/lib/cuFileIo.c b/Security/libsecurity_cdsa_utils/lib/cuFileIo.c
new file mode 100644
index 00000000..bb1403e0
--- /dev/null
+++ b/Security/libsecurity_cdsa_utils/lib/cuFileIo.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2001-2003,2011-2012,2014 Apple Inc. All Rights Reserved.
+ * 
+ * The contents of this file constitute Original Code as defined in and are
+ * subject to the Apple Public Source License Version 1.2 (the 'License').
+ * You may not use this file except in compliance with the License. Please 
+ * obtain a copy of the License at http://www.apple.com/publicsource and 
+ * read it before using this file.
+ * 
+ * This Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
+ * Please see the License for the specific language governing rights and 
+ * limitations under the License.
+ */
+ 
+/*
+	File:		 cuFileIo.c 
+	
+	Description: simple file read/write utilities
+*/
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "cuFileIo.h"
+
+int writeFile(
+	const char			*fileName,
+	const unsigned char	*bytes,
+	unsigned			numBytes)
+{
+	int		rtn;
+	int 	fd;
+	
+	fd = open(fileName, O_RDWR | O_CREAT | O_TRUNC, 0600);
+	if(fd < 0) {
+		return errno;
+	}
+	rtn = (int)lseek(fd, 0, SEEK_SET);
+	if(rtn < 0) {
+		return errno;
+	}
+	rtn = (int)write(fd, bytes, (size_t)numBytes);
+	if(rtn != (int)numBytes) {
+		if(rtn >= 0) {
+			printf("writeFile: short write\n");
+		}
+		rtn = EIO;
+	}
+	else {
+		rtn = 0;
+	}
+	close(fd);
+	return rtn;
+}
+	
+/*
+ * Read entire file. 
+ */
+int readFile(
+	const char		*fileName,
+	unsigned char	**bytes,		// mallocd and returned
+	unsigned		*numBytes)		// returned
+{
+	int rtn;
+	int fd;
+	unsigned char *buf;
+	struct stat	sb;
+	unsigned size;
+	
+	*numBytes = 0;
+	*bytes = NULL;
+	fd = open(fileName, O_RDONLY, 0);
+	if(fd < 0) {
+		return errno;
+	}
+	rtn = fstat(fd, &sb);
+	if(rtn) {
+		goto errOut;
+	}
+	size = (unsigned)sb.st_size;
+	buf = malloc(size);
+	if(buf == NULL) {
+		rtn = ENOMEM;
+		goto errOut;
+	}
+	rtn = (int)lseek(fd, 0, SEEK_SET);
+	if(rtn < 0) {
+		goto errOut;
+	}
+	rtn = (int)read(fd, buf, (size_t)size);
+	if(rtn != (int)size) {
+		if(rtn >= 0) {
+			printf("readFile: short read\n");
+		}
+		rtn = EIO;
+	}
+	else {
+		rtn = 0;
+		*bytes = buf;
+		*numBytes = size;
+	}
+errOut:
+	close(fd);
+	return rtn;
+}