#include "cache.h"
+#include "tag.h"
/*
* A signature file has a very simple fixed format: three lines
static int verify_object(unsigned char *sha1, const char *expected_type)
{
int ret = -1;
- unsigned long mapsize;
- void *map = map_sha1_file(sha1, &mapsize);
-
- if (map) {
- char type[100];
- unsigned long size;
- void *buffer = unpack_sha1_file(map, mapsize, type, &size);
-
- if (buffer) {
- if (!strcmp(type, expected_type))
- ret = check_sha1_signature(sha1, buffer, size, type);
- free(buffer);
- }
- munmap(map, mapsize);
+ char type[100];
+ unsigned long size;
+ void *buffer = read_sha1_file(sha1, type, &size);
+
+ if (buffer) {
+ if (!strcmp(type, expected_type))
+ ret = check_sha1_signature(sha1, buffer, size, type);
+ free(buffer);
}
return ret;
}
int typelen;
char type[20];
unsigned char sha1[20];
- const char *object, *type_line, *tag_line;
+ const char *object, *type_line, *tag_line, *tagger_line;
+
+ if (size < 64)
+ return error("wanna fool me ? you obviously got the size wrong !\n");
- if (size < 64 || size > MAXSIZE-1)
- return -1;
buffer[size] = 0;
/* Verify object line */
object = buffer;
if (memcmp(object, "object ", 7))
- return -1;
+ return error("char%d: does not start with \"object \"\n", 0);
+
if (get_sha1_hex(object + 7, sha1))
- return -1;
+ return error("char%d: could not get SHA1 hash\n", 7);
/* Verify type line */
type_line = object + 48;
if (memcmp(type_line - 1, "\ntype ", 6))
- return -1;
+ return error("char%d: could not find \"\\ntype \"\n", 47);
/* Verify tag-line */
tag_line = strchr(type_line, '\n');
if (!tag_line)
- return -1;
+ return error("char%td: could not find next \"\\n\"\n", type_line - buffer);
tag_line++;
if (memcmp(tag_line, "tag ", 4) || tag_line[4] == '\n')
- return -1;
+ return error("char%td: no \"tag \" found\n", tag_line - buffer);
/* Get the actual type */
typelen = tag_line - type_line - strlen("type \n");
if (typelen >= sizeof(type))
- return -1;
+ return error("char%td: type too long\n", type_line+5 - buffer);
+
memcpy(type, type_line+5, typelen);
type[typelen] = 0;
/* Verify that the object matches */
if (get_sha1_hex(object + 7, sha1))
- return -1;
+ return error("char%d: could not get SHA1 hash but this is really odd since i got it before !\n", 7);
+
if (verify_object(sha1, type))
- return -1;
+ return error("char%d: could not verify object %s\n", 7, sha1);
/* Verify the tag-name: we don't allow control characters or spaces in it */
tag_line += 4;
break;
if (c > ' ')
continue;
- return -1;
+ return error("char%td: could not verify tag name\n", tag_line - buffer);
}
+ /* Verify the tagger line */
+ tagger_line = tag_line;
+
+ if (memcmp(tagger_line, "tagger", 6) || (tagger_line[6] == '\n'))
+ return error("char%td: could not find \"tagger\"\n", tagger_line - buffer);
+
/* The actual stuff afterwards we don't care about.. */
return 0;
}
int main(int argc, char **argv)
{
- unsigned long size;
- char buffer[MAXSIZE];
+ unsigned long size = 4096;
+ char *buffer = malloc(size);
unsigned char result_sha1[20];
if (argc != 1)
usage("cat <signaturefile> | git-mktag");
- // Read the signature
- size = read(0, buffer, MAXSIZE);
+ setup_git_directory();
+
+ if (read_pipe(0, &buffer, &size)) {
+ free(buffer);
+ die("could not read from stdin");
+ }
- // Verify it for some basic sanity: it needs to start with "object <sha1>\ntype "
+ // Verify it for some basic sanity: it needs to start with "object <sha1>\ntype\ntagger "
if (verify_tag(buffer, size) < 0)
die("invalid tag signature file");
- if (write_sha1_file(buffer, size, "tag", result_sha1) < 0)
+ if (write_sha1_file(buffer, size, tag_type, result_sha1) < 0)
die("unable to write tag file");
+
+ free(buffer);
+
printf("%s\n", sha1_to_hex(result_sha1));
return 0;
}