move some useful header information to mscodec for reuse

Change-Id: Ic7adf3ed3c8279cc93a06975d6fb337210d1af87

1 files changed, 64 insertions, 0 deletions

diff --git a/include/filter/msfilter/mscodec.hxx b/include/filter/msfilter/mscodec.hxx
index 1b91df68b33d..dd3acbc1a6bf 100644
--- a/include/filter/msfilter/mscodec.hxx
+++ b/include/filter/msfilter/mscodec.hxx
@@ -355,6 +355,70 @@ private:
     sal_uInt8           m_pDocId[16];
 };
 
+const sal_uInt32 ENCRYPTINFO_CRYPTOAPI      = 0x00000004;
+const sal_uInt32 ENCRYPTINFO_DOCPROPS       = 0x00000008;
+const sal_uInt32 ENCRYPTINFO_EXTERNAL       = 0x00000010;
+const sal_uInt32 ENCRYPTINFO_AES            = 0x00000020;
+
+const sal_uInt32 ENCRYPT_ALGO_AES128        = 0x0000660E;
+const sal_uInt32 ENCRYPT_ALGO_AES192        = 0x0000660F;
+const sal_uInt32 ENCRYPT_ALGO_AES256        = 0x00006610;
+const sal_uInt32 ENCRYPT_ALGO_RC4           = 0x00006801;
+
+const sal_uInt32 ENCRYPT_HASH_SHA1          = 0x00008004;
+
+const sal_uInt32 ENCRYPT_KEY_SIZE_AES_128   = 0x00000080;
+const sal_uInt32 ENCRYPT_KEY_SIZE_AES_192   = 0x000000C0;
+const sal_uInt32 ENCRYPT_KEY_SIZE_AES_256   = 0x00000100;
+
+const sal_uInt32 ENCRYPT_PROVIDER_TYPE_AES  = 0x00000018;
+const sal_uInt32 ENCRYPT_PROVIDER_TYPE_RC4  = 0x00000001;
+
+// version of encryption info used in MS Office 2007 (major = 3, minor = 2)
+const sal_uInt32 VERSION_INFO_2007_FORMAT       = 0x00020003;
+// version of encryption info used in MS Office 2007 SP2 and older (major = 4, minor = 2)
+const sal_uInt32 VERSION_INFO_2007_FORMAT_SP2   = 0x00020004;
+
+// version of encryption info - agile (major = 4, minor = 4)
+const sal_uInt32 VERSION_INFO_AGILE         = 0x00040004;
+
+const sal_uInt32 SALT_LENGTH                    = 16;
+const sal_uInt32 ENCRYPTED_VERIFIER_LENGTH      = 16;
+const sal_uInt32 SHA1_HASH_LENGTH = RTL_DIGEST_LENGTH_SHA1; // 20
+const sal_uInt32 SHA256_HASH_LENGTH = 32;
+const sal_uInt32 SHA512_HASH_LENGTH = 64;
+
+struct MSFILTER_DLLPUBLIC EncryptionStandardHeader
+{
+    sal_uInt32 flags;
+    sal_uInt32 sizeExtra;       // 0
+    sal_uInt32 algId;           // if flag AES && CRYPTOAPI this defaults to 128-bit AES
+    sal_uInt32 algIdHash;       // 0: determine by flags - defaults to SHA-1 if not external
+    sal_uInt32 keyBits;         // key size in bits: 0 (determine by flags), 128, 192, 256
+    sal_uInt32 providedType;    // AES or RC4
+    sal_uInt32 reserved1;       // 0
+    sal_uInt32 reserved2;       // 0
+
+    EncryptionStandardHeader();
+};
+
+struct MSFILTER_DLLPUBLIC EncryptionVerifierAES
+{
+    sal_uInt32 saltSize;                                                // must be 0x00000010
+    sal_uInt8  salt[SALT_LENGTH];                                       // random generated salt value
+    sal_uInt8  encryptedVerifier[ENCRYPTED_VERIFIER_LENGTH];            // randomly generated verifier value
+    sal_uInt32 encryptedVerifierHashSize;                               // actually written hash size - depends on algorithm
+    sal_uInt8  encryptedVerifierHash[SHA256_HASH_LENGTH];               // verifier value hash - itself also encrypted
+
+    EncryptionVerifierAES();
+};
+
+struct MSFILTER_DLLPUBLIC StandardEncryptionInfo
+{
+    EncryptionStandardHeader header;
+    EncryptionVerifierAES    verifier;
+};
+
 
 } // namespace msfilter