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Fix pdfioFileGetAuthor, etc. APIs (Issue #33)
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Michael R Sweet
parent
26d485cfc5
commit
a3f3bbfe11
@ -11,6 +11,7 @@ v1.1.0 (Month DD, YYYY)
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- Added protection against opening multiple streams in the same file at the
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same time.
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- Fixed "install-shared" target (Issue #32)
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- Fixed `pdfioFileGet...` metadata APIs (Issue #33)
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- Fixed `pdfioContentMatrixRotate` function.
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60
pdfio-file.c
60
pdfio-file.c
@ -24,6 +24,7 @@
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static pdfio_obj_t *add_obj(pdfio_file_t *pdf, size_t number, unsigned short generation, off_t offset);
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static int compare_objmaps(_pdfio_objmap_t *a, _pdfio_objmap_t *b);
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static int compare_objs(pdfio_obj_t **a, pdfio_obj_t **b);
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static const char *get_info_string(pdfio_file_t *pdf, const char *key);
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static bool load_obj_stream(pdfio_obj_t *obj);
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static bool load_pages(pdfio_file_t *pdf, pdfio_obj_t *obj, size_t depth);
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static bool load_xref(pdfio_file_t *pdf, off_t xref_offset, pdfio_password_cb_t password_cb, void *password_data);
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@ -892,7 +893,7 @@ pdfioFileFindObj(
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const char * // O - Author or `NULL` for none
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pdfioFileGetAuthor(pdfio_file_t *pdf) // I - PDF file
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{
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return (pdf && pdf->info_obj ? pdfioDictGetString(pdf->info_obj->value.value.dict, "Author") : NULL);
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return (get_info_string(pdf, "Author"));
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}
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@ -904,7 +905,7 @@ time_t // O - Creation date or `0` for none
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pdfioFileGetCreationDate(
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pdfio_file_t *pdf) // I - PDF file
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{
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return (pdf && pdf->info_obj ? pdfioDictGetDate(pdf->info_obj->value.value.dict, "CreationDate") : 0);
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return (pdf && pdf->info_obj ? pdfioDictGetDate(pdfioObjGetDict(pdf->info_obj), "CreationDate") : 0);
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}
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@ -915,7 +916,7 @@ pdfioFileGetCreationDate(
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const char * // O - Creator string or `NULL` for none
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pdfioFileGetCreator(pdfio_file_t *pdf) // I - PDF file
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{
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return (pdf && pdf->info_obj ? pdfioDictGetString(pdf->info_obj->value.value.dict, "Creator") : NULL);
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return (get_info_string(pdf, "Creator"));
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}
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@ -937,7 +938,7 @@ pdfioFileGetID(pdfio_file_t *pdf) // I - PDF file
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const char * // O - Keywords string or `NULL` for none
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pdfioFileGetKeywords(pdfio_file_t *pdf) // I - PDF file
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{
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return (pdf && pdf->info_obj ? pdfioDictGetString(pdf->info_obj->value.value.dict, "Keywords") : NULL);
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return (get_info_string(pdf, "Keywords"));
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}
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@ -1041,7 +1042,7 @@ pdfioFileGetPermissions(
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const char * // O - Producer string or `NULL` for none
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pdfioFileGetProducer(pdfio_file_t *pdf) // I - PDF file
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{
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return (pdf && pdf->info_obj ? pdfioDictGetString(pdf->info_obj->value.value.dict, "Producer") : NULL);
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return (get_info_string(pdf, "Producer"));
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}
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@ -1052,7 +1053,7 @@ pdfioFileGetProducer(pdfio_file_t *pdf) // I - PDF file
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const char * // O - Subject or `NULL` for none
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pdfioFileGetSubject(pdfio_file_t *pdf) // I - PDF file
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{
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return (pdf && pdf->info_obj ? pdfioDictGetString(pdf->info_obj->value.value.dict, "Subject") : NULL);
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return (get_info_string(pdf, "Subject"));
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}
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@ -1063,7 +1064,7 @@ pdfioFileGetSubject(pdfio_file_t *pdf) // I - PDF file
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const char * // O - Title or `NULL` for none
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pdfioFileGetTitle(pdfio_file_t *pdf) // I - PDF file
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{
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return (pdf && pdf->info_obj ? pdfioDictGetString(pdf->info_obj->value.value.dict, "Title") : NULL);
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return (get_info_string(pdf, "Title"));
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}
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@ -1406,6 +1407,51 @@ compare_objs(pdfio_obj_t **a, // I - First object
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}
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//
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// 'get_info_string()' - Get a string value from the Info dictionary.
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//
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// This function also handles converting binary strings to C strings, which
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// occur in encrypted PDF files.
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//
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static const char * // O - String or `NULL` if not found
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get_info_string(pdfio_file_t *pdf, // I - PDF file
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const char *key) // I - Dictionary key
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{
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pdfio_dict_t *dict; // Info dictionary
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_pdfio_value_t *value; // Value
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// Range check input...
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if (!pdf || !pdf->info_obj || (dict = pdfioObjGetDict(pdf->info_obj)) == NULL || (value = _pdfioDictGetValue(dict, key)) == NULL)
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return (NULL);
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// If we already have a value, return it...
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if (value->type == PDFIO_VALTYPE_NAME || value->type == PDFIO_VALTYPE_STRING)
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{
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return (value->value.string);
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}
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else if (value->type == PDFIO_VALTYPE_BINARY && value->value.binary.datalen < 4096)
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{
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// Convert binary string to regular string...
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char temp[4096]; // Temporary string
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memcpy(temp, value->value.binary.data, value->value.binary.datalen);
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temp[value->value.binary.datalen] = '\0';
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free(value->value.binary.data);
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value->type = PDFIO_VALTYPE_STRING;
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value->value.string = pdfioStringCreate(pdf, temp);
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return (value->value.string);
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}
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else
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{
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// Something else that is not a string...
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return (NULL);
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}
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}
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//
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// 'load_obj_stream()' - Load an object stream.
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//
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@ -219,7 +219,6 @@ _pdfioValueRead(pdfio_file_t *pdf, // I - PDF file
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PDFIO_DEBUG("_pdfioValueRead(pdf=%p, obj=%p, v=%p)\n", pdf, obj, v);
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(void)obj; // TODO: Implement decryption
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if (!_pdfioTokenGet(tb, token, sizeof(token)))
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return (NULL);
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@ -284,6 +283,7 @@ _pdfioValueRead(pdfio_file_t *pdf, // I - PDF file
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}
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}
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}
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if (token[i])
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{
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// Just a string...
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@ -367,6 +367,33 @@ _pdfioValueRead(pdfio_file_t *pdf, // I - PDF file
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*dataptr++ = (unsigned char)d;
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}
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if (obj && pdf->encryption)
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{
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// Decrypt the string...
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_pdfio_crypto_ctx_t ctx; // Decryption context
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_pdfio_crypto_cb_t cb; // Decryption callback
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size_t ivlen; // Number of initialization vector bytes
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uint8_t temp[32768]; // Temporary buffer for decryption
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size_t templen; // Number of actual data bytes
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if (v->value.binary.datalen > (sizeof(temp) - 32))
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{
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_pdfioFileError(pdf, "Unable to read encrypted binary string - too long.");
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return (false);
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}
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cb = _pdfioCryptoMakeReader(pdf, obj, &ctx, v->value.binary.data, &ivlen);
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templen = (cb)(&ctx, temp, v->value.binary.data + ivlen, v->value.binary.datalen - ivlen);
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// Copy the decrypted string back to the value and adjust the length...
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memcpy(v->value.binary.data, temp, templen);
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if (pdf->encryption >= PDFIO_ENCRYPTION_AES_128)
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v->value.binary.datalen = templen - temp[templen - 1];
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else
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v->value.binary.datalen = templen;
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}
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}
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else if (strchr("0123456789-+.", token[0]) != NULL)
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{
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82
testpdfio.c
82
testpdfio.c
@ -1310,6 +1310,7 @@ read_unit_file(const char *filename, // I - File to read
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{
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pdfio_file_t *pdf; // PDF file
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size_t i; // Looping var
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const char *s; // String
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bool error = false; // Error callback data
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@ -1320,6 +1321,87 @@ read_unit_file(const char *filename, // I - File to read
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else
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return (1);
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// Verify metadata...
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fputs("pdfioFileGetAuthor: ", stdout);
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if ((s = pdfioFileGetAuthor(pdf)) != NULL && !strcmp(s, "Michael R Sweet"))
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{
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puts("PASS");
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}
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else if (s)
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{
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printf("FAIL (got '%s', expected 'Michael R Sweet')\n", s);
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return (1);
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}
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else
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{
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puts("FAIL (got NULL, expected 'Michael R Sweet')");
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return (1);
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}
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fputs("pdfioFileGetCreator: ", stdout);
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if ((s = pdfioFileGetCreator(pdf)) != NULL && !strcmp(s, "testpdfio"))
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{
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puts("PASS");
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}
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else if (s)
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{
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printf("FAIL (got '%s', expected 'testpdfio')\n", s);
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return (1);
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}
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else
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{
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puts("FAIL (got NULL, expected 'testpdfio')");
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return (1);
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}
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fputs("pdfioFileGetKeywords: ", stdout);
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if ((s = pdfioFileGetKeywords(pdf)) != NULL && !strcmp(s, "one fish,two fish,red fish,blue fish"))
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{
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puts("PASS");
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}
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else if (s)
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{
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printf("FAIL (got '%s', expected 'one fish,two fish,red fish,blue fish')\n", s);
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return (1);
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}
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else
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{
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puts("FAIL (got NULL, expected 'one fish,two fish,red fish,blue fish')");
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return (1);
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}
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fputs("pdfioFileGetSubject: ", stdout);
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if ((s = pdfioFileGetSubject(pdf)) != NULL && !strcmp(s, "Unit test document"))
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{
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puts("PASS");
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}
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else if (s)
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{
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printf("FAIL (got '%s', expected 'Unit test document')\n", s);
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return (1);
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}
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else
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{
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puts("FAIL (got NULL, expected 'Unit test document')");
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return (1);
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}
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fputs("pdfioFileGetTitle: ", stdout);
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if ((s = pdfioFileGetTitle(pdf)) != NULL && !strcmp(s, "Test Document"))
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{
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puts("PASS");
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}
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else if (s)
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{
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printf("FAIL (got '%s', expected 'Test Document')\n", s);
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return (1);
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}
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else
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{
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puts("FAIL (got NULL, expected 'Test Document')");
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return (1);
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}
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// Verify the number of pages is the same...
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fputs("pdfioFileGetNumPages: ", stdout);
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if (num_pages == pdfioFileGetNumPages(pdf))
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