diff options
Diffstat (limited to 'qpdf/qpdf.cc')
| -rw-r--r-- | qpdf/qpdf.cc | 125 |
1 files changed, 104 insertions, 21 deletions
diff --git a/qpdf/qpdf.cc b/qpdf/qpdf.cc index 148dff04..cf99ca44 100644 --- a/qpdf/qpdf.cc +++ b/qpdf/qpdf.cc @@ -33,18 +33,29 @@ Usage: qpdf [ options ] infilename [ outfilename ]\n\ \n\ An option summary appears below. Please see the documentation for details.\n\ \n\ +Note that when contradictory options are provided, whichever options are\n\ +provided last take precedence.\n\ +\n\ \n\ Basic Options\n\ -------------\n\ \n\ --password=password specify a password for accessing encrypted files\n\ --linearize generated a linearized (web optimized) file\n\ +--copy-encryption=file copy encryption parameters from specified file\n\ +--encryption-file-password=password\n\ + password used to open the file from which encryption\n\ + parameters are being copied\n\ --encrypt options -- generate an encrypted file\n\ --decrypt remove any encryption on the file\n\ \n\ -If neither --encrypt or --decrypt are given, qpdf will preserve any\n\ -encryption data associated with a file.\n\ +If none of --copy-encryption, --encrypt or --decrypt are given, qpdf will\n\ +preserve any encryption data associated with a file.\n\ \n\ +Note that when copying encryption parameters from another file, all\n\ +parameters will be copied, including both user and owner passwords, even\n\ +if the user password is used to open the other file. This works even if\n\ +the owner password is not known.\n\ \n\ Encryption Options\n\ ------------------\n\ @@ -192,12 +203,39 @@ static std::string show_bool(bool v) return v ? "allowed" : "not allowed"; } +static std::string show_encryption_method(QPDF::encryption_method_e method) +{ + std::string result = "unknown"; + switch (method) + { + case QPDF::e_none: + result = "none"; + break; + case QPDF::e_unknown: + result = "unknown"; + break; + case QPDF::e_rc4: + result = "RC4"; + break; + case QPDF::e_aes: + result = "AESv2"; + break; + // no default so gcc will warn for missing case + } + return result; +} + static void show_encryption(QPDF& pdf) { // Extract /P from /Encrypt int R = 0; int P = 0; - if (! pdf.isEncrypted(R, P)) + int V = 0; + QPDF::encryption_method_e stream_method = QPDF::e_unknown; + QPDF::encryption_method_e string_method = QPDF::e_unknown; + QPDF::encryption_method_e file_method = QPDF::e_unknown; + if (! pdf.isEncrypted(R, P, V, + stream_method, string_method, file_method)) { std::cout << "File is not encrypted" << std::endl; } @@ -206,25 +244,34 @@ static void show_encryption(QPDF& pdf) std::cout << "R = " << R << std::endl; std::cout << "P = " << P << std::endl; std::string user_password = pdf.getTrimmedUserPassword(); - std::cout << "User password = " << user_password << std::endl; - std::cout << "extract for accessibility: " - << show_bool(pdf.allowAccessibility()) << std::endl; - std::cout << "extract for any purpose: " - << show_bool(pdf.allowExtractAll()) << std::endl; - std::cout << "print low resolution: " - << show_bool(pdf.allowPrintLowRes()) << std::endl; - std::cout << "print high resolution: " - << show_bool(pdf.allowPrintHighRes()) << std::endl; - std::cout << "modify document assembly: " - << show_bool(pdf.allowModifyAssembly()) << std::endl; - std::cout << "modify forms: " - << show_bool(pdf.allowModifyForm()) << std::endl; - std::cout << "modify annotations: " - << show_bool(pdf.allowModifyAnnotation()) << std::endl; - std::cout << "modify other: " - << show_bool(pdf.allowModifyOther()) << std::endl; - std::cout << "modify anything: " + std::cout << "User password = " << user_password << std::endl + << "extract for accessibility: " + << show_bool(pdf.allowAccessibility()) << std::endl + << "extract for any purpose: " + << show_bool(pdf.allowExtractAll()) << std::endl + << "print low resolution: " + << show_bool(pdf.allowPrintLowRes()) << std::endl + << "print high resolution: " + << show_bool(pdf.allowPrintHighRes()) << std::endl + << "modify document assembly: " + << show_bool(pdf.allowModifyAssembly()) << std::endl + << "modify forms: " + << show_bool(pdf.allowModifyForm()) << std::endl + << "modify annotations: " + << show_bool(pdf.allowModifyAnnotation()) << std::endl + << "modify other: " + << show_bool(pdf.allowModifyOther()) << std::endl + << "modify anything: " << show_bool(pdf.allowModifyAll()) << std::endl; + if (V >= 4) + { + std::cout << "stream encryption method: " + << show_encryption_method(stream_method) << std::endl + << "string encryption method: " + << show_encryption_method(string_method) << std::endl + << "file encryption method: " + << show_encryption_method(file_method) << std::endl; + } } } @@ -579,6 +626,10 @@ int main(int argc, char* argv[]) bool linearize = false; bool decrypt = false; + bool copy_encryption = false; + char const* encryption_file = 0; + char const* encryption_file_password = ""; + bool encrypt = false; std::string user_password; std::string owner_password; @@ -664,11 +715,36 @@ int main(int argc, char* argv[]) r3_accessibility, r3_extract, r3_print, r3_modify, force_V4, cleartext_metadata, use_aes); encrypt = true; + decrypt = false; + copy_encryption = false; } else if (strcmp(arg, "decrypt") == 0) { decrypt = true; + encrypt = false; + copy_encryption = false; } + else if (strcmp(arg, "copy-encryption") == 0) + { + if (parameter == 0) + { + usage("--copy-encryption must be given as" + "--copy_encryption=file"); + } + encryption_file = parameter; + copy_encryption = true; + encrypt = false; + decrypt = false; + } + else if (strcmp(arg, "encryption-file-password") == 0) + { + if (parameter == 0) + { + usage("--encryption-file-password must be given as" + "--encryption-file-password=password"); + } + encryption_file_password = parameter; + } else if (strcmp(arg, "stream-data") == 0) { if (parameter == 0) @@ -865,6 +941,7 @@ int main(int argc, char* argv[]) try { QPDF pdf; + QPDF encryption_pdf; if (ignore_xref_streams) { pdf.setIgnoreXRefStreams(true); @@ -1082,6 +1159,12 @@ int main(int argc, char* argv[]) { w.setSuppressOriginalObjectIDs(true); } + if (copy_encryption) + { + encryption_pdf.processFile( + encryption_file, encryption_file_password); + w.copyEncryptionParameters(encryption_pdf); + } if (encrypt) { if (keylen == 40) |