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sbinfo: fix a few typos (thanks to Kane Xie), correct coding style, now generate segments along with program sections to make elf files appear more valid (this allows to rebuild an .sb file using elftosb2)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29510 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Amaury Pouly 2011-03-03 09:22:32 +00:00
parent 708f5508ad
commit f85c04469e
3 changed files with 129 additions and 43 deletions
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59
utils/sbinfo/sbinfo.c
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@ -63,8 +63,8 @@ char BLUE[] = { 0x1b, 0x5b, 0x31, 0x3b, '3', '4', 0x6d, '\0' };
/* byte swapping */
#define get32le(a) ((uint32_t) \
( buf[a+3] << 24 | buf[a+2] << 16 | buf[a+1] << 8 | buf[a] ))
#define get16le(a) ((uint16_t)( buf[a+1] << 8 | buf[a] ))
( g_buf[a+3] << 24 | g_buf[a+2] << 16 | g_buf[a+1] << 8 | g_buf[a] ))
#define get16le(a) ((uint16_t)( g_buf[a+1] << 8 | g_buf[a] ))
/* all blocks are sized as a multiple of 0x1ff */
#define PAD_TO_BOUNDARY(x) (((x) + 0x1ff) & ~0x1ff)
@ -74,8 +74,8 @@ char BLUE[] = { 0x1b, 0x5b, 0x31, 0x3b, '3', '4', 0x6d, '\0' };
/* globals */
size_t sz; /* file size */
uint8_t *buf; /* file content */
size_t g_sz; /* file size */
uint8_t *g_buf; /* file content */
#define PREFIX_SIZE 128
char out_prefix[PREFIX_SIZE];
const char *key_file;
@ -129,25 +129,23 @@ void *xmalloc(size_t s) /* malloc helper, used in elf.c */
static char getchr(int offset)
{
char c;
c = buf[offset];
c = g_buf[offset];
return isprint(c) ? c : '_';
}
static void getstrle(char string[], int offset)
{
int i;
for (i = 0; i < 4; i++) {
for (i = 0; i < 4; i++)
string[i] = getchr(offset + 3 - i);
}
string[4] = 0;
}
static void getstrbe(char string[], int offset)
{
int i;
for (i = 0; i < 4; i++) {
for (i = 0; i < 4; i++)
string[i] = getchr(offset + i);
}
string[4] = 0;
}
@ -155,9 +153,8 @@ static void printhex(int offset, int len)
{
int i;
for (i = 0; i < len; i++) {
printf("%02X ", buf[offset + i]);
}
for (i = 0; i < len; i++)
printf("%02X ", g_buf[offset + i]);
printf("\n");
}
@ -222,7 +219,7 @@ static key_array_t read_keys(int num_keys)
bugp("key file stat() failed");
size = st.st_size;
char *buf = xmalloc(size);
if(read(fd,buf,sz)!=(ssize_t)size)
if(read(fd, buf, size) != (ssize_t)size)
bugp("reading key file");
close(fd);
@ -417,13 +414,13 @@ static void extract(unsigned long filesize)
printf("Basic info:\n");
color(GREEN);
printf("\tHeader SHA-1: ");
byte *hdr_sha1 = &buf[0];
byte *hdr_sha1 = &g_buf[0];
color(YELLOW);
print_sha1(hdr_sha1);
/* Check SHA1 sum */
byte computed_sha1[20];
sha_1_init(&sha_1_params);
sha_1_update(&sha_1_params, &buf[0x14], 0x4C);
sha_1_update(&sha_1_params, &g_buf[0x14], 0x4C);
sha_1_finish(&sha_1_params);
sha_1_output(&sha_1_params, computed_sha1);
color(RED);
@ -480,7 +477,7 @@ static void extract(unsigned long filesize)
if(num_enc > 0)
{
keys = read_keys(num_enc);
color(BLUE),
color(BLUE);
printf("Encryption data\n");
for(int i = 0; i < num_enc; i++)
{
@ -492,14 +489,14 @@ static void extract(unsigned long filesize)
printf("\t\tCBC-MAC of headers: ");
/* copy the cbc mac */
byte hdr_cbc_mac[16];
memcpy(hdr_cbc_mac, &buf[0x60 + 16 * num_chunks + 32 * i], 16);
memcpy(hdr_cbc_mac, &g_buf[0x60 + 16 * num_chunks + 32 * i], 16);
color(YELLOW);
print_key(hdr_cbc_mac);
/* check it */
byte computed_cbc_mac[16];
byte zero[16];
memset(zero, 0, 16);
cbc_mac(buf, NULL, 6 + num_chunks, keys[i], zero, &computed_cbc_mac, 1);
cbc_mac(g_buf, NULL, 6 + num_chunks, keys[i], zero, &computed_cbc_mac, 1);
color(RED);
if(memcmp(hdr_cbc_mac, computed_cbc_mac, 16) == 0)
printf(" Ok\n");
@ -509,7 +506,7 @@ static void extract(unsigned long filesize)
printf("\t\tEncrypted key : ");
byte (*encrypted_key)[16];
encrypted_key = (key_array_t)&buf[0x60 + 16 * num_chunks + 32 * i + 16];
encrypted_key = (key_array_t)&g_buf[0x60 + 16 * num_chunks + 32 * i + 16];
color(YELLOW);
print_key(*encrypted_key);
printf("\n");
@ -517,7 +514,7 @@ static void extract(unsigned long filesize)
/* decrypt */
byte decrypted_key[16];
byte iv[16];
memcpy(iv, buf, 16); /* uses the first 16-bytes of SHA-1 sig as IV */
memcpy(iv, g_buf, 16); /* uses the first 16-bytes of SHA-1 sig as IV */
cbc_mac(*encrypted_key, decrypted_key, 1, keys[i], iv, NULL, 0);
printf("\t\tDecrypted key : ");
color(YELLOW);
@ -571,9 +568,9 @@ static void extract(unsigned long filesize)
/* save it */
byte *sec = xmalloc(size);
if(encrypted)
cbc_mac(buf + pos, sec, size / 16, real_key, buf, NULL, 0);
cbc_mac(g_buf + pos, sec, size / 16, real_key, g_buf, NULL, 0);
else
memcpy(sec, buf + pos, size);
memcpy(sec, g_buf + pos, size);
extract_section(data_sec, name, sec, size, "\t\t\t");
free(sec);
@ -590,16 +587,16 @@ static void extract(unsigned long filesize)
printf("\t\t");
printhex(filesize - 16, 16);
/* decrypt it */
byte *encrypted_block = &buf[filesize - 32];
byte *encrypted_block = &g_buf[filesize - 32];
byte decrypted_block[32];
cbc_mac(encrypted_block, decrypted_block, 2, real_key, buf, NULL, 0);
cbc_mac(encrypted_block, decrypted_block, 2, real_key, g_buf, NULL, 0);
color(GREEN);
printf("\tDecrypted SHA-1:\n\t\t");
color(YELLOW);
print_sha1(decrypted_block);
/* check it */
sha_1_init(&sha_1_params);
sha_1_update(&sha_1_params, buf, filesize - 32);
sha_1_update(&sha_1_params, g_buf, filesize - 32);
sha_1_finish(&sha_1_params);
sha_1_output(&sha_1_params, computed_sha1);
color(RED);
@ -621,17 +618,17 @@ int main(int argc, const char **argv)
else
strcpy(out_prefix, "");
if( (fd = open(argv[1],O_RDONLY)) == -1 )
if( (fd = open(argv[1], O_RDONLY)) == -1 )
bugp("opening firmware failed");
key_file = argv[2];
if(fstat(fd,&st) == -1)
if(fstat(fd, &st) == -1)
bugp("firmware stat() failed");
sz = st.st_size;
g_sz = st.st_size;
buf=xmalloc(sz);
if(read(fd,buf,sz)!=(ssize_t)sz) /* load the whole file into memory */
g_buf = xmalloc(g_sz);
if(read(fd, g_buf, g_sz) != (ssize_t)g_sz) /* load the whole file into memory */
bugp("reading firmware");
close(fd);
@ -641,6 +638,6 @@ int main(int argc, const char **argv)
color(OFF);
free(buf);
free(g_buf);
return 0;
}