Copied: trunk/darwinbuild/digest.c (from rev 860, branches/PR-8279204/darwinbuild/digest.c) (0 => 861)

--- trunk/darwinbuild/digest.c	                        (rev 0)
+++ trunk/darwinbuild/digest.c	2010-08-11 00:22:13 UTC (rev 861)
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2010 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_BSD_LICENSE_HEADER_START@
+ *
+ * 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.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS 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 APPLE OR ITS 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.
+ *
+ * @APPLE_BSD_LICENSE_HEADER_END@
+ */
+
+#include <sys/types.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <CommonCrypto/CommonDigest.h>
+
+
+void print_usage() {
+	fprintf(stdout, "digest [-1]                               \n");
+	fprintf(stdout, "   Print digest hash of stdin to stdout.  \n");
+	fprintf(stdout, "                                          \n");
+	fprintf(stdout, "     -1       Use SHA1 hash (default)     \n");
+	fprintf(stdout, "                                          \n");
+}
+
+char* format_digest(const unsigned char* m) {
+	char* result = NULL;
+	// SHA-1
+	asprintf(&result,
+			 "%02x%02x%02x%02x"
+			 "%02x%02x%02x%02x"
+			 "%02x%02x%02x%02x"
+			 "%02x%02x%02x%02x"
+			 "%02x%02x%02x%02x",
+			 m[0], m[1], m[2], m[3],
+			 m[4], m[5], m[6], m[7],
+			 m[8], m[9], m[10], m[11],
+			 m[12], m[13], m[14], m[15],
+			 m[16], m[17], m[18], m[19]
+			 );
+	return result;
+}
+
+char* calculate_digest(int fd) {
+	unsigned char md[CC_SHA1_DIGEST_LENGTH];
+	CC_SHA1_CTX c;
+	CC_SHA1_Init(&c);
+	
+	memset(md, 0, CC_SHA1_DIGEST_LENGTH);
+	
+	ssize_t len;
+	const unsigned int blocklen = 8192;
+	unsigned char* block = (unsigned char*)malloc(blocklen);
+	if (!block) {
+		errno = ENOMEM;
+		return NULL;
+	}
+	while(1) {
+		len = read(fd, block, blocklen);
+		if (len == 0) { close(fd); break; }
+		if ((len < 0) && (errno == EINTR)) continue;
+		if (len < 0) { close(fd); return NULL; }
+		CC_SHA1_Update(&c, block, (size_t)len);
+	}
+	
+	CC_SHA1_Final(md, &c);
+	free(block);
+	return format_digest(md);
+}
+
+
+int main(int argc, char* argv[]) {
+	
+	int digest = 1; // default to SHA1
+	
+	int ch;
+	while ((ch = getopt(argc, argv, "1")) != -1) {
+		switch (ch) {
+			case '1':
+				digest = 1;
+				break;
+			case '?':
+			default:
+				print_usage();
+				exit(1);
+		}
+	}
+	argc -= optind;
+	argv += optind;
+	
+	fprintf(stdout, "%s\n", calculate_digest(fileno(stdin)));
+
+	return 0;
+}