SHA-256测试向量

Question

I'm attempting to replicate the values found here http://www.nsrl.nist.gov/testdata/

SHA-256 should hash "abc" out to

 BA7816BF 8F01CFEA 414140DE 5DAE2223 B00361A3 96177A9C B410FF61 F20015AD

but under linux with sha256 sum I am getting this.

edeaaff3f1774ad2888673770c6d64097e391bc362d7d6fb34982ddf0efd18cb

adam@adam-desktop:~/code/android-casual/trunk/CASUALcore$ echo "abc">./test.tmp
adam@adam-desktop:~/code/android-casual/trunk/CASUALcore$ sha256sum test.tmp
edeaaff3f1774ad2888673770c6d64097e391bc362d7d6fb34982ddf0efd18cb  test.tmp
adam@adam-desktop:~/code/android-casual/trunk/CASUALcore$ echo "abc"|sha256sum
edeaaff3f1774ad2888673770c6d64097e391bc362d7d6fb34982ddf0efd18cb  -

Answer 1

That's because echo appends a newline to the string. Use echo -n instead:

$ echo "abc" | shasum -a 256
edeaaff3f1774ad2888673770c6d64097e391bc362d7d6fb34982ddf0efd18cb  -
$ echo -n "abc" | shasum -a 256
ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad  -