Hi. Try using the if= and of= arguments for dd. Does that make a difference? Cheers. Am 28.07.2016 um 18:32 schrieb Pascal: > hi, > > I've a large file (some Gb) that I want to encrypt without copying it, > so I do this : > > # md5sum myfile > d2e539a1ff722e9f8f8f97605ca4ec1e - > # cryptsetup --type plain open myfile enc > Enter passphrase: > # dd bs=4M < myfile > /dev/mapper/enc > w+1 records in > w+1 records out > x bytes copied, y s, z MB/s > # md5sum < /dev/mapper/enc > d2e539a1ff722e9f8f8f97605ca4ec1e - > > and all is ok for encryption. > now, I want to decrypt my encrypted file in the same way, so I do this : > > # dd bs=4M < /dev/mapper/enc | md5sum > d2e539a1ff722e9f8f8f97605ca4ec1e - > > it starts well but the result does not go as desired : > > # dd bs=4M < /dev/mapper/enc > myfile > w+1 records in > w+1 records out > x bytes copied, y s, z MB/s > # md5sum myfile > 120f0695aa0c2c0940f8a5a4c0bbd18f - > > I tried increasing the bs (32M) but the result is the same :-( > > what is my problem ? > > regards. _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
