diff options
Diffstat (limited to 'libqpdf/Pl_MD5.cc')
-rw-r--r-- | libqpdf/Pl_MD5.cc | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/libqpdf/Pl_MD5.cc b/libqpdf/Pl_MD5.cc index 29787625..44911b42 100644 --- a/libqpdf/Pl_MD5.cc +++ b/libqpdf/Pl_MD5.cc @@ -12,14 +12,27 @@ Pl_MD5::~Pl_MD5() } void -Pl_MD5::write(unsigned char* buf, int len) +Pl_MD5::write(unsigned char* buf, size_t len) { if (! this->in_progress) { this->md5.reset(); this->in_progress = true; } - this->md5.encodeDataIncrementally((char*) buf, len); + + // Write in chunks in case len is too big to fit in an int. + // Assume int is at least 32 bits. + static size_t const max_bytes = 1 << 30; + size_t bytes_left = len; + unsigned char* data = buf; + while (bytes_left > 0) + { + size_t bytes = (bytes_left >= max_bytes ? max_bytes : bytes_left); + this->md5.encodeDataIncrementally((char*) data, (int)bytes); + bytes_left -= bytes; + data += bytes; + } + this->getNext()->write(buf, len); } |