back to old rpmoffset
This commit is contained in:
geos_one
parent
411a244fbd
commit
a9b5a9c25e
@ -1,4 +1,5 @@
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AUX rpmoffset.c 2755 RMD160 00f9a7e8dd8117eded73ead581e7bce9c40ed5af SHA1 cbe8b9f226c03d9b2b988d756adf507857bc47ce SHA256 b43c6bf2c3623d3fbc304ff3a804cf568caa7cd2d702ff5043ac8eda3c4fb42d
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AUX rpm5offset.c 2755 RMD160 00f9a7e8dd8117eded73ead581e7bce9c40ed5af SHA1 cbe8b9f226c03d9b2b988d756adf507857bc47ce SHA256 b43c6bf2c3623d3fbc304ff3a804cf568caa7cd2d702ff5043ac8eda3c4fb42d
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AUX rpmoffset.c 1964 RMD160 acea626f5080b7ea47863cf9e3bc2ab3b381c61e SHA1 5ec35b3d37773ca4a09443c6ea687c7d3a739f34 SHA256 e1e18d68009bd4541d6c65b43f45b58d720b9c87eba612d7616e244142f80dfe
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EBUILD rpm5offset-9.0-r2.ebuild 653 RMD160 2f85563f7df4e5548f241bb1ee870a311f9587bb SHA1 c242da35e6e69aa1fd8514c5a03977fd7c837f09 SHA256 74aed2a38c21a7be598b6f60ac9820807ff9ee2ab29023863faad265fb00107a
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MISC ChangeLog 551 RMD160 097d5f93696e887e988fed531abda20ca9628152 SHA1 8f7cb8b55fb8f2ce542fb10cbd6e96723a472ac4 SHA256 0e1b6be4ddf6c2e697320ee1e1bdea987c5a8fa7f55b7f60147e89ff26d5ea83
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MISC metadata.xml 170 RMD160 645927a396fdc21cdeb089fe42c5397332420ea6 SHA1 ac7f48a14fec325926f9ce1be8fbf1f311b4f2e4 SHA256 d797a2ec6f9dc516c9f9c1a758ee87ad3e8c43101b5dc76c2f872d5bd4639b42
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121
trunk/novell4gentoo/app-arch/rpm5offset/files/rpm5offset.c
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121
trunk/novell4gentoo/app-arch/rpm5offset/files/rpm5offset.c
Normal file
@ -0,0 +1,121 @@
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/* Find how deeply inside an .RPM the real data is */
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/* kept, and report the offset in bytes */
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/* Wouldn't it be a lot more sane if we could just untar these things? */
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#ifndef _GNU_SOURCE
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# define _GNU_SOURCE
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#endif
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#ifndef ARRAY_SIZE
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# define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
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#endif
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#ifndef BUFSIZ
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# define BUFSIZ 8192
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#endif
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typedef struct {
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const char *type;
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const unsigned char *magic;
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const size_t len;
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} magic_t;
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/* LZMA is some fuzzy crap */
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int is_magic_lzma(const char *buf)
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{
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return (buf[0] == 0x5d && buf[4] < 0x20) &&
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(!memcmp(buf + 10, "\x00\x00\x00", 3) ||
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!memcmp(buf + 5, "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF", 8));
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}
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#define magic_lzma_len 13
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static const unsigned char magic_gzip[] = { '\037', '\213', '\010' };
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static const unsigned char magic_bzip2[] = { 'B', 'Z', 'h' };
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static const unsigned char magic_xz[] = { 0xFD, '7', 'z', 'X', 'Z', 0x00 };
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static const magic_t magics[] = {
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#define DECLARE_MAGIC_T(t) { .type = #t, .magic = magic_##t, .len = sizeof(magic_##t), },
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DECLARE_MAGIC_T(gzip)
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DECLARE_MAGIC_T(bzip2)
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DECLARE_MAGIC_T(xz)
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#undef DECLARE_MAGIC_T
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};
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#define MAGIC_SIZE_MIN 3
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#define MAGIC_SIZE_MAX 13
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static int show_magic;
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static int magic_finish(const char *magic, size_t offset)
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{
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if (show_magic)
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printf("%s ", magic);
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printf("%zu\n", offset);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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size_t i, read_cnt, offset, left, lzma_offset;
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FILE *fp = stdin;
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char p[BUFSIZ];
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if (argc == 2 && !strcmp(argv[1], "-v")) {
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show_magic = 1;
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--argc;
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}
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if (argc != 1) {
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puts("Usage: rpmoffset < rpmfile");
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return 1;
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}
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/* fp = fopen(argv[1], "r"); */
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lzma_offset = 0;
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offset = left = 0;
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while (1) {
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read_cnt = fread(p + left, 1, sizeof(p) - left, fp);
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if (read_cnt + left < MAGIC_SIZE_MIN)
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break;
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for (i = 0; i < ARRAY_SIZE(magics); ++i) {
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const char *needle;
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if (read_cnt + left < magics[i].len)
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continue;
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needle = memmem(p, sizeof(p), magics[i].magic, magics[i].len);
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if (needle)
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return magic_finish(magics[i].type, offset + (needle - p));
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}
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/* Scan for LZMA magic, but don't return yet ... */
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if (!lzma_offset && read_cnt + left >= magic_lzma_len) {
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for (i = 0; i <= read_cnt + left - magic_lzma_len; ++i)
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if (is_magic_lzma(p + i)) {
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lzma_offset = offset + i;
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break;
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}
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}
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memmove(p, p + left + read_cnt - MAGIC_SIZE_MIN + 1, MAGIC_SIZE_MIN - 1);
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offset += read_cnt;
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if (left == 0) {
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offset -= MAGIC_SIZE_MIN - 1;
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left = MAGIC_SIZE_MIN - 1;
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}
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}
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/* Delay till the end for LZMA archives since it is too fuzzy */
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if (lzma_offset)
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return magic_finish("lzma", lzma_offset);
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if (ferror(stdin))
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perror(argv[0]);
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return 1;
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}
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@ -4,118 +4,69 @@
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/* Wouldn't it be a lot more sane if we could just untar these things? */
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#ifndef _GNU_SOURCE
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# define _GNU_SOURCE
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#endif
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#ifndef ARRAY_SIZE
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# define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
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#endif
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#ifndef BUFSIZ
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# define BUFSIZ 8192
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#endif
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/* These offsets keep getting bigger, so we're going to just bite a 2MB */
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/* chunk of RAM right away so that we have enough. Yeah, horrible */
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/* quick and dirty implementation, but hey -- it gets the job done. */
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typedef struct {
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const char *type;
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const unsigned char *magic;
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const size_t len;
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} magic_t;
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#define RPMBUFSIZ 3145728
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/* LZMA is some fuzzy crap */
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int is_magic_lzma(const char *buf)
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main()
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{
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return (buf[0] == 0x5d && buf[4] < 0x20) &&
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(!memcmp(buf + 10, "\x00\x00\x00", 3) ||
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!memcmp(buf + 5, "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF", 8));
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}
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#define magic_lzma_len 13
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static const unsigned char magic_gzip[] = { '\037', '\213', '\010' };
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static const unsigned char magic_bzip2[] = { 'B', 'Z', 'h' };
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static const unsigned char magic_xz[] = { 0xFD, '7', 'z', 'X', 'Z', 0x00 };
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static const magic_t magics[] = {
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#define DECLARE_MAGIC_T(t) { .type = #t, .magic = magic_##t, .len = sizeof(magic_##t), },
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DECLARE_MAGIC_T(gzip)
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DECLARE_MAGIC_T(bzip2)
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DECLARE_MAGIC_T(xz)
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#undef DECLARE_MAGIC_T
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};
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#define MAGIC_SIZE_MIN 3
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#define MAGIC_SIZE_MAX 13
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static int show_magic;
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static int magic_finish(const char *magic, size_t offset)
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{
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if (show_magic)
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printf("%s ", magic);
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printf("%zu\n", offset);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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size_t i, read_cnt, offset, left, lzma_offset;
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FILE *fp = stdin;
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char p[BUFSIZ];
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if (argc == 2 && !strcmp(argv[1], "-v")) {
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show_magic = 1;
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--argc;
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}
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if (argc != 1) {
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puts("Usage: rpmoffset < rpmfile");
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return 1;
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}
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/* fp = fopen(argv[1], "r"); */
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lzma_offset = 0;
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offset = left = 0;
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while (1) {
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read_cnt = fread(p + left, 1, sizeof(p) - left, fp);
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if (read_cnt + left < MAGIC_SIZE_MIN)
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break;
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for (i = 0; i < ARRAY_SIZE(magics); ++i) {
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const char *needle;
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if (read_cnt + left < magics[i].len)
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continue;
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needle = memmem(p, sizeof(p), magics[i].magic, magics[i].len);
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if (needle)
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return magic_finish(magics[i].type, offset + (needle - p));
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}
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/* Scan for LZMA magic, but don't return yet ... */
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if (!lzma_offset && read_cnt + left >= magic_lzma_len) {
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for (i = 0; i <= read_cnt + left - magic_lzma_len; ++i)
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if (is_magic_lzma(p + i)) {
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lzma_offset = offset + i;
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break;
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}
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}
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memmove(p, p + left + read_cnt - MAGIC_SIZE_MIN + 1, MAGIC_SIZE_MIN - 1);
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offset += read_cnt;
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if (left == 0) {
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offset -= MAGIC_SIZE_MIN - 1;
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left = MAGIC_SIZE_MIN - 1;
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}
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}
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/* Delay till the end for LZMA archives since it is too fuzzy */
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if (lzma_offset)
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return magic_finish("lzma", lzma_offset);
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if (ferror(stdin))
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perror(argv[0]);
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return 1;
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char *buff = malloc(RPMBUFSIZ),*eb,*p;
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for (p = buff, eb = buff + read(0,buff,RPMBUFSIZ); p < eb; p++)
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{
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/* gzip format */
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if (*p == '\037' && p[1] == '\213' && p[2] == '\010')
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{
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printf("%ld\n",p - buff);
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exit(0);
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}
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/* bzip2 format */
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else if (*p == 'B' && p[1] == 'Z' && p[2] == 'h' )
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{
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printf("%ld\n",p - buff);
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exit(0);
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}
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/* LZMA files; both LZMA_Alone and LZMA utils formats. The LZMA_Alone
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* format is used by the LZMA_Alone tool from LZMA SDK. The LZMA utils
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* format is the default format of LZMA utils 4.32.1 and later. */
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/* LZMA utils format */
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else if (*p == '\377' && p[1] == 'L' &&
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p[2] == 'Z' && p[3] == 'M' &&
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p[4] == 'A' && p[5] == '\000')
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{
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printf("%ld\n",p - buff);
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exit(0);
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}
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/* The LZMA_Alone format has no magic bytes, thus we
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* need to play a wizard. This can give false positives,
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* thus the detection below should be removed when
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* the newer LZMA utils format has got popular. */
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// else if (*p == 0x5D && p[1] == 0x00 &&
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else if (*p == '\135' &&
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p[5] == '\377' && p[6] == '\377' &&
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p[7] == '\377' && p[8] == '\377' &&
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p[9] == '\377' && p[10] == '\377' &&
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p[11] == '\377' && p[12] == '\377')
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/* ((p[10] == 0x00 && p[11] == 0x00 &&
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p[12] == 0x00) ||
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(p[5] == 0xFF && p[6] == 0xFF &&
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p[7] == 0xFF && p[8] == 0xFF &&
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p[9] == 0xFF && p[10] == 0xFF &&
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p[11] == 0xFF && p[12] == 0xFF)))
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*/ {
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printf("%ld\n",p - buff);
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exit(0);
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}
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}
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exit(1);
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}
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