diff options
Diffstat (limited to 'source/pdf')
| -rw-r--r-- | source/pdf/pdf-crypt.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/source/pdf/pdf-crypt.c b/source/pdf/pdf-crypt.c index 36ddab0d..5341bff7 100644 --- a/source/pdf/pdf-crypt.c +++ b/source/pdf/pdf-crypt.c @@ -503,17 +503,14 @@ pdf_new_crypt(fz_context *ctx, pdf_obj *dict, pdf_obj *id) } if (crypt->xjc) { -#if 0 - unsigned char akey[] = "\xCE\x69\x16\xAC\xD3\xA5\x00\x85\xF2\xD0\x22\x2A\x9C\xCE\x64\x4F\x65\xDF\x47\xE4\xE3\x6C\x24\x2B\x1B\x31\x6A\x3D\x3B\xE2\x20\xCC"; -#endif fz_sha256 sha256; fz_sha256 xml_hash; + fz_sha256 final_hash; unsigned char xml_hash_sum[32]; unsigned char *r_buf = NULL; size_t r_size = 0; mt19937 mtctx; - // crypt->encrypt_metadata = 0; obj = pdf_dict_get(ctx, dict, PDF_NAME(Length)); if (pdf_is_int(ctx, obj)) crypt->length = pdf_to_int(ctx, obj); @@ -523,9 +520,11 @@ pdf_new_crypt(fz_context *ctx, pdf_obj *dict, pdf_obj *id) crypt->strf.method = PDF_CRYPT_AESV3; crypt->strf.length = crypt->length; - fz_sha256_update(&sha256, "ProfXJC.General", 15); fz_warn(ctx, "crypt method: %d, crypt length: %d, crypt perm: %x", crypt->stmf.method, crypt->length, crypt->p); + + fz_sha256_init(&sha256); + fz_sha256_update(&sha256, "ProfXJC.General", 15); fz_sha256_update(&sha256, &crypt->stmf.method, 4); unsigned char lenbytes[4] = { crypt->length / 8, 0, 0, 0 }; fz_sha256_update(&sha256, lenbytes, 4); @@ -603,7 +602,11 @@ pdf_new_crypt(fz_context *ctx, pdf_obj *dict, pdf_obj *id) fz_sha256_update(&sha256, xml_hash_sum, 32); fz_sha256_final(&sha256, crypt->key); - // memcpy(crypt->key, akey, 32); /* TODO: kill this */ + for (int i = 0; i < 43; i++) { + fz_sha256_init(&final_hash); + fz_sha256_update(&final_hash, crypt->key, 32); + fz_sha256_final(&final_hash, crypt->key); + } return crypt; } return crypt; |