diff options
Diffstat (limited to 'lib/siscomponentrecord.cpp')
| -rw-r--r-- | lib/siscomponentrecord.cpp | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/lib/siscomponentrecord.cpp b/lib/siscomponentrecord.cpp index 7ec468d..8078886 100644 --- a/lib/siscomponentrecord.cpp +++ b/lib/siscomponentrecord.cpp @@ -31,30 +31,44 @@ SISComponentNameRecord::~SISComponentNameRecord() delete[] m_names; } -void -SISComponentNameRecord::fillFrom(uchar* buf, int base, SISFile* sisFile) +SisRC +SISComponentNameRecord::fillFrom(uchar* buf, int base, off_t len, + SISFile* sisFile) { + int n = sisFile->m_header.m_nlangs; + if (base + 8 + n * 4 * 2) + return SIS_TRUNCATED; + uchar* p = buf + base; int size = 0; - int n = sisFile->m_header.m_nlangs; m_nameLengths = new uint32[n]; m_namePtrs = new uint32[n]; - m_names = new uchar*[n]; // First read lengths. // for (int i = 0; i < n; ++i) { m_nameLengths[i] = read32(p + size); + if (m_nameLengths[i] > len) + { + printf("Length too large for name record %d.\n", i); + return SIS_TRUNCATED; + } size += 4; } // Then read ptrs. // + m_names = new uchar*[n]; for (int i = 0; i < n; ++i) { m_namePtrs[i] = read32(p + size); + if (m_namePtrs[i] + m_nameLengths[i] > len) + { + printf("Position/length too large for name record %d.\n", i); + return SIS_TRUNCATED; + } size += 4; if (logLevel >= 2) printf("Name %d (for %s) is %.*s\n", @@ -69,6 +83,7 @@ SISComponentNameRecord::fillFrom(uchar* buf, int base, SISFile* sisFile) } if (logLevel >= 1) printf("%d .. %d (%d bytes): Name records\n", base, base + size, size); + return SIS_OK; } uchar* |