diff options
Diffstat (limited to 'source/pdf/pdf-crypt.c')
| -rw-r--r-- | source/pdf/pdf-crypt.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/source/pdf/pdf-crypt.c b/source/pdf/pdf-crypt.c index a8a1bdb5..b9cbc05f 100644 --- a/source/pdf/pdf-crypt.c +++ b/source/pdf/pdf-crypt.c @@ -294,7 +294,7 @@ pdf_new_crypt(fz_context *ctx, pdf_obj *dict, pdf_obj *id) obj = pdf_dict_gets(ctx, dict, "Recipients"); if (pdf_is_string(ctx, obj)) { unsigned char idstr[32]; - int l = pdf_to_str_len(ctx, obj); + r_size = pdf_to_str_len(ctx, obj); if (pdf_is_array(ctx, id) && pdf_array_len(ctx, id) == 2) { @@ -320,22 +320,23 @@ pdf_new_crypt(fz_context *ctx, pdf_obj *dict, pdf_obj *id) fz_warn(ctx, "length of id[1] is %ld", osz); } } - r_buf = fz_malloc(ctx, l); - memcpy(r_buf, pdf_to_str_buf(ctx, obj), l); + r_buf = fz_malloc(ctx, r_size); + memcpy(r_buf, pdf_to_str_buf(ctx, obj), r_size); unsigned char tmpbyte = 0xff; int ididx = 0; - for (int i = 0; i < l; i++) { + for (int i = 0; i < r_size; i++) { tmpbyte ^= idstr[ididx]; ididx = (ididx + 1) % 32; r_buf[i] ^= tmpbyte; - // printf("%c", r_buf[i]); } } /* hash some weird thing */ - /* hash an XML */ + fz_sha256_update(&sha256, r_buf, r_size); + fz_sha256_init(&xml_hash); - /* hash an XML */ + fz_sha256_update(&xml_hash, r_buf, r_size); fz_sha256_final(&xml_hash, xml_hash_sum); + fz_sha256_update(&sha256, xml_hash_sum, 32); fz_sha256_final(&sha256, crypt->key); |