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#include "proone_pack.h"
#include <stdint.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <openssl/bio.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#include <zlib.h>
void proone_init_bin_archive (proone_bin_archive_t *a) {
a->data_size = 0;
a->data = NULL;
a->nb_binaries = 0;
a->arch_arr = NULL;
a->offset_arr = NULL;
a->size_arr = NULL;
}
void proone_init_unpack_bin_archive_result (proone_unpack_bin_archive_result_t *r) {
r->data_size = 0;
r->data = NULL;
r->result = PROONE_UNPACK_BIN_ARCHIVE_OK;
r->err = 0;
}
proone_unpack_bin_archive_result_t proone_unpack_bin_archive (const int fd) {
static const size_t fd_buf_size = 77, bio_buf_size = 58, z_buf_size = 4096;
proone_unpack_bin_archive_result_t ret;
BIO *b64_bio = NULL, *mem_bio = NULL;
uint8_t fd_buf[fd_buf_size], bio_buf[bio_buf_size], z_buf[z_buf_size];
int fd_read_size, fd_data_size, bio_write_size, bio_read_size;
int z_func_ret;
z_stream stream;
size_t z_out_size;
void *ny_buf;
bool stream_end;
size_t i;
proone_init_unpack_bin_archive_result(&ret);
stream.zalloc = NULL;
stream.zfree = NULL;
stream.opaque = NULL;
stream.avail_in = 0;
stream.next_in = Z_NULL;
z_func_ret = inflateInit(&stream);
if (z_func_ret != Z_OK) {
ret.result = PROONE_UNPACK_BIN_ARCHIVE_Z_ERR;
ret.err = z_func_ret;
return ret;
}
if ((mem_bio = BIO_new(BIO_s_mem())) == NULL || (b64_bio = BIO_new(BIO_f_base64())) == NULL) {
ret.result = PROONE_UNPACK_BIN_ARCHIVE_OPENSSL_ERR;
ret.err = ERR_get_error();
goto END;
}
BIO_set_flags(b64_bio, BIO_FLAGS_BASE64_NO_NL);
BIO_push(b64_bio, mem_bio);
stream_end = false;
do {
fd_read_size = read(fd, fd_buf, fd_buf_size);
if (fd_read_size < 0) {
ret.result = PROONE_UNPACK_BIN_ARCHIVE_ERRNO;
ret.err = errno;
goto END;
}
if (fd_read_size == 0) {
break;
}
// remove white spaces
fd_data_size = fd_read_size;
for (i = 0; i < (size_t)fd_data_size; ) {
if (isspace(fd_buf[i])) {
if (i + 1 >= (size_t)fd_data_size) {
// last trailing whitespace
fd_data_size -= 1;
break;
}
memmove(fd_buf + i, fd_buf + i + 1, fd_data_size - i - 1);
fd_data_size -= 1;
}
else {
i += 1;
}
}
if (fd_data_size > 0) {
BIO_reset(mem_bio);
bio_write_size = BIO_write(mem_bio, fd_buf, fd_data_size);
if (bio_write_size != fd_data_size) {
ret.result = PROONE_UNPACK_BIN_ARCHIVE_MEM_ERR;
goto END;
}
bio_read_size = BIO_read(b64_bio, bio_buf, (int)bio_buf_size);
if (bio_read_size < 0) {
ret.result = PROONE_UNPACK_BIN_ARCHIVE_OPENSSL_ERR;
ret.err = ERR_get_error();
goto END;
}
if (bio_read_size > 0) {
stream.avail_in = bio_read_size;
stream.next_in = bio_buf;
do {
stream.avail_out = z_buf_size;
stream.next_out = z_buf;
z_func_ret = inflate(&stream, Z_NO_FLUSH);
switch (z_func_ret) {
case Z_STREAM_END:
stream_end = true;
break;
case Z_OK:
case Z_BUF_ERROR:
break;
default:
ret.result = PROONE_UNPACK_BIN_ARCHIVE_Z_ERR;
ret.err = z_func_ret;
goto END;
}
z_out_size = z_buf_size - stream.avail_out;
ny_buf = realloc(ret.data, ret.data_size + z_out_size);
if (ny_buf == NULL) {
ret.result = PROONE_UNPACK_BIN_ARCHIVE_MEM_ERR;
ret.err = errno;
break;
}
ret.data = (uint8_t*)ny_buf;
memcpy(ret.data + ret.data_size, z_buf, z_out_size);
ret.data_size += z_out_size;
} while (stream.avail_out == 0);
}
}
} while (!stream_end);
END:
inflateEnd(&stream);
BIO_free(b64_bio);
BIO_free(mem_bio);
if (ret.result != PROONE_UNPACK_BIN_ARCHIVE_OK) {
free(ret.data);
ret.data = NULL;
ret.data_size = 0;
}
return ret;
}
proone_index_bin_archive_result_code_t proone_index_bin_archive (proone_unpack_bin_archive_result_t *in, proone_bin_archive_t *out) {
proone_index_bin_archive_result_code_t ret = PROONE_INDEX_BIN_ARCHIVE_OK;
size_t buf_pos = 0, arr_cnt = 0, offset_arr[NB_PROONE_ARCH], size_arr[NB_PROONE_ARCH];
proone_arch_t arch;
uint32_t bin_size;
proone_arch_t arch_arr[NB_PROONE_ARCH];
proone_bin_archive_t archive;
uint8_t *out_buf;
memset(arch_arr, 0, sizeof(proone_arch_t) * NB_PROONE_ARCH);
memset(offset_arr, 0, sizeof(size_t) * NB_PROONE_ARCH);
memset(size_arr, 0, sizeof(size_t) * NB_PROONE_ARCH);
proone_init_bin_archive(&archive);
do {
if (buf_pos + 4 >= in->data_size || arr_cnt >= NB_PROONE_ARCH) {
ret = PROONE_INDEX_BIN_ARCHIVE_FMT_ERR;
goto END;
}
arch = (proone_arch_t)in->data[buf_pos];
bin_size =
((uint32_t)in->data[buf_pos + 1] << 16) |
((uint32_t)in->data[buf_pos + 2] << 8) |
(uint32_t)in->data[buf_pos + 3];
if (proone_arch2str(arch) == NULL || bin_size == 0 || buf_pos + 4 + bin_size > in->data_size) {
ret = PROONE_INDEX_BIN_ARCHIVE_FMT_ERR;
goto END;
}
arch_arr[arr_cnt] = arch;
offset_arr[arr_cnt] = 4 + buf_pos;
size_arr[arr_cnt] = bin_size;
arr_cnt += 1;
buf_pos += 4 + bin_size;
} while (buf_pos < in->data_size);
out_buf = (uint8_t*)malloc(sizeof(proone_arch_t) * arr_cnt + sizeof(size_t*) * arr_cnt + sizeof(size_t*) * arr_cnt);
if (out_buf == NULL) {
ret = PROONE_INDEX_BIN_ARCHIVE_MEM_ERR;
goto END;
}
archive.arch_arr = (proone_arch_t*)out_buf;
archive.offset_arr = (size_t*)(out_buf + sizeof(proone_arch_t) * arr_cnt);
archive.size_arr = (size_t*)(out_buf + sizeof(proone_arch_t) * arr_cnt + sizeof(size_t*) * arr_cnt);
archive.data_size = in->data_size;
archive.data = in->data;
archive.nb_binaries = arr_cnt;
memcpy(archive.arch_arr, arch_arr, arr_cnt * sizeof(proone_arch_t));
memcpy(archive.offset_arr, offset_arr, arr_cnt * sizeof(size_t));
memcpy(archive.size_arr, size_arr, arr_cnt * sizeof(size_t));
in->data = NULL;
in->data_size = 0;
*out = archive;
END:
if (ret != PROONE_INDEX_BIN_ARCHIVE_OK) {
proone_free_bin_archive(&archive);
}
return ret;
}
void proone_free_unpack_bin_archive_result (proone_unpack_bin_archive_result_t *r) {
free(r->data);
r->data = NULL;
r->data_size = 0;
r->result = PROONE_INDEX_BIN_ARCHIVE_OK;
r->err = 0;
}
void proone_free_bin_archive (proone_bin_archive_t *a) {
free(a->data);
free(a->arch_arr);
a->nb_binaries = 0;
a->data_size = 0;
a->arch_arr = NULL;
a->offset_arr = NULL;
a->size_arr = NULL;
}
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