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Add PDFIO_MAX_STRING constant to control maximum allowed PDF strings (Issue #117)

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Michael R Sweet
2025-04-04 19:27:03 -04:00
parent 8cca645835
commit fe755eac3d
3 changed files with 11 additions and 5 deletions
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14
pdfio-value.c
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@@ -125,7 +125,8 @@ _pdfioValueDecrypt(pdfio_file_t *pdf, // I - PDF file
_pdfio_crypto_ctx_t ctx; // Decryption context
_pdfio_crypto_cb_t cb; // Decryption callback
size_t ivlen; // Number of initialization vector bytes
uint8_t temp[32768]; // Temporary buffer for decryption
uint8_t temp[PDFIO_MAX_STRING + 32];
// Temporary buffer for decryption
size_t templen; // Number of actual data bytes
time_t timeval; // Date/time value
@@ -300,7 +301,7 @@ _pdfioValueRead(pdfio_file_t *pdf, // I - PDF file
_pdfio_value_t *v, // I - Value
size_t depth) // I - Depth of value
{
char token[32768]; // Token buffer
char token[PDFIO_MAX_STRING];// Token buffer
time_t timeval; // Date/time value
#ifdef DEBUG
static const char * const valtypes[] =
@@ -546,7 +547,8 @@ _pdfioValueWrite(pdfio_file_t *pdf, // I - PDF file
case PDFIO_VALTYPE_BINARY :
{
size_t databytes; // Bytes to write
uint8_t temp[32768], // Temporary buffer for encryption
uint8_t temp[PDFIO_MAX_STRING + 32],
// Temporary buffer for encryption
*dataptr; // Pointer into data
if (obj && pdf->encryption)
@@ -609,7 +611,8 @@ _pdfioValueWrite(pdfio_file_t *pdf, // I - PDF file
if (obj && pdf->encryption)
{
// Write encrypted string...
uint8_t temp[32768], // Encrypted bytes
uint8_t temp[PDFIO_MAX_STRING + 32],
// Encrypted bytes
*tempptr; // Pointer into encrypted bytes
_pdfio_crypto_ctx_t ctx; // Encryption context
_pdfio_crypto_cb_t cb; // Encryption callback
@@ -660,7 +663,8 @@ _pdfioValueWrite(pdfio_file_t *pdf, // I - PDF file
if (obj && pdf->encryption)
{
// Write encrypted string...
uint8_t temp[32768], // Encrypted bytes
uint8_t temp[PDFIO_MAX_STRING + 32],
// Encrypted bytes
*tempptr; // Pointer into encrypted bytes
_pdfio_crypto_ctx_t ctx; // Encryption context
_pdfio_crypto_cb_t cb; // Encryption callback