diff options
Diffstat (limited to 'src/H5Znbit.c')
| -rw-r--r-- | src/H5Znbit.c | 97 |
1 files changed, 73 insertions, 24 deletions
diff --git a/src/H5Znbit.c b/src/H5Znbit.c index 04e8869..7efab42 100644 --- a/src/H5Znbit.c +++ b/src/H5Znbit.c @@ -65,13 +65,13 @@ static void H5Z_nbit_decompress_one_nooptype(unsigned char *data, size_t data_of unsigned char *buffer, size_t *j, size_t *buf_len, unsigned size); static void H5Z_nbit_decompress_one_atomic(unsigned char *data, size_t data_offset, unsigned char *buffer, size_t *j, size_t *buf_len, const parms_atomic *p); -static void H5Z_nbit_decompress_one_array(unsigned char *data, size_t data_offset, +static herr_t H5Z__nbit_decompress_one_array(unsigned char *data, size_t data_offset, unsigned char *buffer, size_t *j, size_t *buf_len, const unsigned parms[], unsigned *parms_index); -static void H5Z_nbit_decompress_one_compound(unsigned char *data, size_t data_offset, +static herr_t H5Z__nbit_decompress_one_compound(unsigned char *data, size_t data_offset, unsigned char *buffer, size_t *j, size_t *buf_len, const unsigned parms[], unsigned *parms_index); -static void H5Z_nbit_decompress(unsigned char *data, unsigned d_nelmts, unsigned char *buffer, +static herr_t H5Z__nbit_decompress(unsigned char *data, unsigned d_nelmts, unsigned char *buffer, const unsigned parms[]); static void H5Z_nbit_compress_one_nooptype(unsigned char *data, size_t data_offset, unsigned char *buffer, size_t *j, size_t *buf_len, unsigned size); @@ -1011,7 +1011,8 @@ H5Z_filter_nbit(unsigned flags, size_t cd_nelmts, const unsigned cd_values[], HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, 0, "memory allocation failed for nbit decompression") /* decompress the buffer */ - H5Z_nbit_decompress(outbuf, d_nelmts, (unsigned char *)*buf, cd_values); + if(H5Z__nbit_decompress(outbuf, d_nelmts, (unsigned char *)*buf, cd_values) < 0) + HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, 0, "can't decompress buffer") } /* end if */ /* output; compress */ else { @@ -1166,13 +1167,16 @@ H5Z_nbit_decompress_one_atomic(unsigned char *data, size_t data_offset, } } -static void -H5Z_nbit_decompress_one_array(unsigned char *data, size_t data_offset, +static herr_t +H5Z__nbit_decompress_one_array(unsigned char *data, size_t data_offset, unsigned char *buffer, size_t *j, size_t *buf_len, const unsigned parms[], unsigned *parms_index) { unsigned i, total_size, base_class, base_size, n, begin_index; parms_atomic p; + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_STATIC total_size = parms[(*parms_index)++]; base_class = parms[(*parms_index)++]; @@ -1183,6 +1187,11 @@ H5Z_nbit_decompress_one_array(unsigned char *data, size_t data_offset, p.order = parms[(*parms_index)++]; p.precision = parms[(*parms_index)++]; p.offset = parms[(*parms_index)++]; + + /* Check values of precision and offset */ + if(p.precision > p.size * 8 || (p.precision + p.offset) > p.size * 8) + HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "invalid datatype precision/offset") + n = total_size / p.size; for(i = 0; i < n; i++) H5Z_nbit_decompress_one_atomic(data, data_offset + i * p.size, @@ -1194,8 +1203,9 @@ H5Z_nbit_decompress_one_array(unsigned char *data, size_t data_offset, n = total_size / base_size; /* number of base_type elements inside the array datatype */ begin_index = *parms_index; for(i = 0; i < n; i++) { - H5Z_nbit_decompress_one_array(data, data_offset + i * base_size, - buffer, j, buf_len, parms, parms_index); + if(H5Z__nbit_decompress_one_array(data, data_offset + i * base_size, + buffer, j, buf_len, parms, parms_index) < 0) + HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, FAIL, "can't decompress array") *parms_index = begin_index; } break; @@ -1205,8 +1215,9 @@ H5Z_nbit_decompress_one_array(unsigned char *data, size_t data_offset, n = total_size / base_size; /* number of base_type elements inside the array datatype */ begin_index = *parms_index; for(i = 0; i < n; i++) { - H5Z_nbit_decompress_one_compound(data, data_offset + i * base_size, - buffer, j, buf_len, parms, parms_index); + if(H5Z__nbit_decompress_one_compound(data, data_offset + i * base_size, + buffer, j, buf_len, parms, parms_index) < 0) + HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, FAIL, "can't decompress compound") *parms_index = begin_index; } break; @@ -1219,44 +1230,66 @@ H5Z_nbit_decompress_one_array(unsigned char *data, size_t data_offset, default: HDassert(0 && "This Should never be executed!"); } /* end switch */ + +done: + FUNC_LEAVE_NOAPI(ret_value) } -static void -H5Z_nbit_decompress_one_compound(unsigned char *data, size_t data_offset, +static herr_t +H5Z__nbit_decompress_one_compound(unsigned char *data, size_t data_offset, unsigned char *buffer, size_t *j, size_t *buf_len, const unsigned parms[], unsigned *parms_index) { - unsigned i, nmembers, member_offset, member_class, size; + unsigned i, nmembers, member_offset, member_class, member_size, used_size = 0, size; parms_atomic p; + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_STATIC - (*parms_index)++; /* skip total size of compound datatype */ + size = parms[(*parms_index)++]; nmembers = parms[(*parms_index)++]; for(i = 0; i < nmembers; i++) { member_offset = parms[(*parms_index)++]; member_class = parms[(*parms_index)++]; + + /* Check for overflow */ + member_size = parms[*parms_index]; + used_size += member_size; + if(used_size > size) + HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "compound member offset overflowed compound size") switch(member_class) { case H5Z_NBIT_ATOMIC: - p.size = parms[(*parms_index)++]; + p.size = member_size; + /* Advance past member size */ + (*parms_index)++; p.order = parms[(*parms_index)++]; p.precision = parms[(*parms_index)++]; p.offset = parms[(*parms_index)++]; + + /* Check values of precision and offset */ + if(p.precision > p.size * 8 || (p.precision + p.offset) > p.size * 8) + HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "invalid datatype precision/offset") + H5Z_nbit_decompress_one_atomic(data, data_offset + member_offset, buffer, j, buf_len, &p); break; case H5Z_NBIT_ARRAY: - H5Z_nbit_decompress_one_array(data, data_offset + member_offset, - buffer, j, buf_len, parms, parms_index); + if(H5Z__nbit_decompress_one_array(data, data_offset + member_offset, + buffer, j, buf_len, parms, parms_index) < 0) + HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, FAIL, "can't decompress array") break; case H5Z_NBIT_COMPOUND: - H5Z_nbit_decompress_one_compound(data, data_offset+member_offset, - buffer, j, buf_len, parms, parms_index); + if(H5Z__nbit_decompress_one_compound(data, data_offset+member_offset, + buffer, j, buf_len, parms, parms_index) < 0) + HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, FAIL, "can't decompress compound") break; case H5Z_NBIT_NOOPTYPE: - size = parms[(*parms_index)++]; + /* Advance past member size */ + (*parms_index)++; H5Z_nbit_decompress_one_nooptype(data, data_offset+member_offset, buffer, j, buf_len, size); break; @@ -1265,10 +1298,13 @@ H5Z_nbit_decompress_one_compound(unsigned char *data, size_t data_offset, HDassert(0 && "This Should never be executed!"); } /* end switch */ } + +done: + FUNC_LEAVE_NOAPI(ret_value) } -static void -H5Z_nbit_decompress(unsigned char *data, unsigned d_nelmts, unsigned char *buffer, +static herr_t +H5Z__nbit_decompress(unsigned char *data, unsigned d_nelmts, unsigned char *buffer, const unsigned parms[]) { /* i: index of data, j: index of buffer, @@ -1278,6 +1314,9 @@ H5Z_nbit_decompress(unsigned char *data, unsigned d_nelmts, unsigned char *buffe size_t buf_len; parms_atomic p; unsigned parms_index; /* index in array parms used by compression/decompression functions */ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_STATIC /* may not have to initialize to zeros */ HDmemset(data, 0, d_nelmts * parms[4]); @@ -1292,6 +1331,11 @@ H5Z_nbit_decompress(unsigned char *data, unsigned d_nelmts, unsigned char *buffe p.order = parms[5]; p.precision = parms[6]; p.offset = parms[7]; + + /* Check values of precision and offset */ + if(p.precision > p.size * 8 || (p.precision + p.offset) > p.size * 8) + HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "invalid datatype precision/offset") + for(i = 0; i < d_nelmts; i++) H5Z_nbit_decompress_one_atomic(data, i * p.size, buffer, &j, &buf_len, &p); break; @@ -1300,7 +1344,8 @@ H5Z_nbit_decompress(unsigned char *data, unsigned d_nelmts, unsigned char *buffe size = parms[4]; parms_index = 4; /* set the index before goto function call */ for(i = 0; i < d_nelmts; i++) { - H5Z_nbit_decompress_one_array(data, i * size, buffer, &j, &buf_len, parms, &parms_index); + if(H5Z__nbit_decompress_one_array(data, i * size, buffer, &j, &buf_len, parms, &parms_index) < 0) + HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, FAIL, "can't decompress array") parms_index = 4; } break; @@ -1309,7 +1354,8 @@ H5Z_nbit_decompress(unsigned char *data, unsigned d_nelmts, unsigned char *buffe size = parms[4]; parms_index = 4; /* set the index before goto function call */ for(i = 0; i < d_nelmts; i++) { - H5Z_nbit_decompress_one_compound(data, i * size, buffer, &j, &buf_len, parms, &parms_index); + if(H5Z__nbit_decompress_one_compound(data, i * size, buffer, &j, &buf_len, parms, &parms_index) < 0) + HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, FAIL, "can't decompress compound") parms_index = 4; } break; @@ -1317,6 +1363,9 @@ H5Z_nbit_decompress(unsigned char *data, unsigned d_nelmts, unsigned char *buffe default: HDassert(0 && "This Should never be executed!"); } /* end switch */ + +done: + FUNC_LEAVE_NOAPI(ret_value) } static void |