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77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
#include <string.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stddef.h>
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#include <zlib.h>
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#include <assert.h>
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#include "igzip_lib.h"
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int LLVMFuzzerTestOneInput(const uint8_t * data, size_t size)
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{
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struct inflate_state state;
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z_stream zstate;
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size_t out_buf_size = 2 * size;
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int zret, iret;
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char z_msg_invalid_code_set[] = "invalid code lengths set";
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char z_msg_invalid_dist_set[] = "invalid distances set";
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char z_msg_invalid_lit_len_set[] = "invalid literal/lengths set";
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uint8_t *isal_out_buf = (uint8_t *) malloc(size * 2);
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uint8_t *zlib_out_buf = (uint8_t *) malloc(size * 2);
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assert(NULL != isal_out_buf && NULL != zlib_out_buf);
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/* Inflate data with isal_inflate */
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memset(&state, 0xff, sizeof(struct inflate_state));
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isal_inflate_init(&state);
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state.next_in = (uint8_t *) data;
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state.avail_in = size;
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state.next_out = isal_out_buf;
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state.avail_out = out_buf_size;
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iret = isal_inflate_stateless(&state);
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/* Inflate data with zlib */
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zstate.zalloc = Z_NULL;
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zstate.zfree = Z_NULL;
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zstate.opaque = Z_NULL;
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zstate.avail_in = size;
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zstate.next_in = (Bytef *) data;
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zstate.avail_out = out_buf_size;
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zstate.next_out = zlib_out_buf;
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if (inflateInit2(&zstate, -15) != Z_OK) {
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free(isal_out_buf);
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free(zlib_out_buf);
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return -1;
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}
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zret = inflate(&zstate, Z_FINISH);
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if (zret == Z_STREAM_END) {
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/* If zlib finished, assert isal finished with the same answer */
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assert(state.block_state == ISAL_BLOCK_FINISH);
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assert(zstate.total_out == state.total_out);
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assert(memcmp(isal_out_buf, zlib_out_buf, state.total_out) == 0);
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} else if (zret < 0) {
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if (zret != Z_BUF_ERROR)
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/* If zlib errors, assert isal errors, excluding a few
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* cases where zlib is overzealous and when zlib notices
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* an error faster than isal */
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assert(iret < 0 || strcmp(zstate.msg, z_msg_invalid_code_set) == 0
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|| strcmp(zstate.msg, z_msg_invalid_dist_set) == 0
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|| strcmp(zstate.msg, z_msg_invalid_lit_len_set) == 0
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|| (iret == ISAL_END_INPUT && zstate.avail_in < 3));
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} else
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/* If zlib did not finish or error, assert isal did not finish
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* or that isal found an invalid header since isal notices the
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* error faster than zlib */
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assert(iret > 0 || iret == ISAL_INVALID_BLOCK);
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inflateEnd(&zstate);
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free(isal_out_buf);
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free(zlib_out_buf);
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return 0;
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}
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