1 files changed, 70 insertions, 0 deletions
diff --git a/source/luametatex/source/libraries/pplib/ppcrypt.h b/source/luametatex/source/libraries/pplib/ppcrypt.h
new file mode 100644
index 000000000..9fa52d878
--- /dev/null
+++ b/source/luametatex/source/libraries/pplib/ppcrypt.h
@@ -0,0 +1,70 @@
+
+#ifndef PP_CRYPT_H
+#define PP_CRYPT_H
+
+#include "ppfilter.h"
+#include "utilcrypt.h"
+#include "utilcryptdef.h"
+
+#define PPCRYPT_MAX_PASSWORD 127
+#define PPCRYPT_MAX_KEY 32
+
+typedef struct {
+  ppuint algorithm_variant;                /* /V entry of encrypt dict */
+  ppuint algorithm_revision;               /* /R entry of encrypt dict */
+  ppint permissions;                       /* /P entry of encrypt dict */
+  ppdict *map;                             /* /CF filters map of encrypt dict */
+  uint8_t userpass[PPCRYPT_MAX_PASSWORD];  /* user password */
+  size_t userpasslength;                   /* user password length */
+  uint8_t ownerpass[PPCRYPT_MAX_PASSWORD]; /* owner password */
+  size_t ownerpasslength;                  /* owner password length */
+  uint8_t filekey[PPCRYPT_MAX_KEY+5+4];    /* file key with an extra space for salt */
+  size_t filekeylength;                    /* key length; usually 5, 16 or 32 bytes */
+  uint8_t cryptkey[PPCRYPT_MAX_KEY];       /* crypt key for a recent reference */
+  size_t cryptkeylength;                   /* crypt key length; usually keylength + 5 */
+  //ppstring *cryptkeystring;                /* todo: cached cryptkey string for V5, where all refs has the same */
+  ppref *ref;                              /* recent reference */
+  union { /* cached crypt states for strings encrypted/decrypted with the same key */
+    struct {
+      rc4_state rc4state;
+      rc4_map rc4map;
+      rc4_map rc4copy;
+    };
+    struct {
+      aes_state aesstate;
+      aes_keyblock aeskeyblock;
+      uint8_t ivcopy[16];
+    };
+  };
+  int flags;
+} ppcrypt;
+
+#define PPCRYPT_NO_METADATA (1<<0)
+#define PPCRYPT_USER_PASSWORD (1<<1)
+#define PPCRYPT_OWNER_PASSWORD (1<<2)
+#define PPCRYPT_STREAM_RC4 (1<<3)
+#define PPCRYPT_STRING_RC4 (1<<4)
+#define PPCRYPT_STREAM_AES (1<<5)
+#define PPCRYPT_STRING_AES (1<<6)
+
+#define PPCRYPT_STREAM (PPCRYPT_STREAM_AES|PPCRYPT_STREAM_RC4)
+#define PPCRYPT_STRING (PPCRYPT_STRING_AES|PPCRYPT_STRING_RC4)
+#define PPCRYPT_RC4 (PPCRYPT_STREAM_RC4|PPCRYPT_STRING_RC4)
+#define PPCRYPT_AES (PPCRYPT_STREAM_AES|PPCRYPT_STRING_AES)
+
+#define PPCRYPT_INFO_AES  (1<<0)
+#define PPCRYPT_INFO_RC4  (1<<1)
+#define PPCRYPT_INFO_MD   (1<<2)
+#define PPCRYPT_INFO_NOMD (1<<3)
+
+ppcrypt_status ppdoc_crypt_init (ppdoc *pdf, const void *userpass, size_t userpasslength, const void *ownerpass, size_t ownerpasslength);
+int ppstring_decrypt (ppcrypt *crypt, const void *input, size_t size, void *output, size_t *newsize);
+
+#define ppcrypt_start_ref(crypt, r) ((crypt)->ref = r, (crypt)->cryptkeylength = 0)
+#define ppcrypt_end_ref(crypt) ((crypt)->ref = NULL, (crypt)->cryptkeylength = 0)
+#define ppcrypt_ref(pdf, crypt) ((crypt = (pdf)->crypt) != NULL && crypt->ref != NULL)
+
+int ppcrypt_type (ppcrypt *crypt, ppname *cryptname, ppuint *length, int *cryptflags);
+ppstring * ppcrypt_stmkey (ppcrypt *crypt, ppref *ref, int aes, ppheap *heap);
+
+#endif