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#ifndef MUPDF_PDF_CRYPT_H
#define MUPDF_PDF_CRYPT_H
/*
* Encryption
*/
pdf_crypt *pdf_new_crypt(fz_context *ctx, pdf_obj *enc, pdf_obj *id);
void pdf_drop_crypt(fz_context *ctx, pdf_crypt *crypt);
void pdf_crypt_obj(fz_context *ctx, pdf_crypt *crypt, pdf_obj *obj, int num, int gen);
void pdf_crypt_buffer(fz_context *ctx, pdf_crypt *crypt, fz_buffer *buf, int num, int gen);
fz_stream *pdf_open_crypt(fz_context *ctx, fz_stream *chain, pdf_crypt *crypt, int num, int gen);
fz_stream *pdf_open_crypt_with_filter(fz_context *ctx, fz_stream *chain, pdf_crypt *crypt, pdf_obj *name, int num, int gen);
int pdf_crypt_version(fz_context *ctx, pdf_document *doc);
int pdf_crypt_revision(fz_context *ctx, pdf_document *doc);
char *pdf_crypt_method(fz_context *ctx, pdf_document *doc);
int pdf_crypt_length(fz_context *ctx, pdf_document *doc);
unsigned char *pdf_crypt_key(fz_context *ctx, pdf_document *doc);
void pdf_print_crypt(fz_context *ctx, fz_output *out, pdf_crypt *crypt);
void pdf_write_digest(fz_context *ctx, fz_output *out, pdf_obj *byte_range, int digest_offset, int digest_length, pdf_pkcs7_signer *signer);
/*
pdf_signature_widget_byte_range: retrieve the byte range for a signature widget
*/
int pdf_signature_widget_byte_range(fz_context *ctx, pdf_document *doc, pdf_widget *widget, int (*byte_range)[2]);
/*
pdf_signature_widget_contents: retrieve the contents for a signature widget
*/
int pdf_signature_widget_contents(fz_context *ctx, pdf_document *doc, pdf_widget *widget, char **contents);
/*
pdf_check_signature: check a signature's certificate chain and digest
*/
int pdf_check_signature(fz_context *ctx, pdf_document *doc, pdf_widget *widget, char *ebuf, int ebufsize);
/*
pdf_sign_signature: sign a signature form field
*/
void pdf_sign_signature(fz_context *ctx, pdf_document *doc, pdf_widget *widget, const char *sigfile, const char *password);
void pdf_encrypt_data(fz_context *ctx, pdf_crypt *crypt, int num, int gen, void (*fmt_str_out)(fz_context *, void *, const unsigned char *, int), void *arg, const unsigned char *s, int n);
int pdf_encrypted_len(fz_context *ctx, pdf_crypt *crypt, int num, int gen, int len);
#endif
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