$ openssl ecparam -list_curves
ECDSAで署名の生成・検証をする
$ echo abcde > plain.txt
$ openssl ecparam -genkey -name secp112r1 -out key-pair.pem
$ openssl ec -in key-pair.pem -outform PEM -pubout -out public.pem
$ openssl ec -in key-pair.pem -outform PEM -out private.pem
$ openssl dgst -sha1 -sign private.pem plain.txt > signature.dat
$ openssl dgst -sha1 -verify public.pem -signature signature.dat plain.txt
$ openssl asn1parse -inform DER -in signature.dat
0:d=0 hl=2 l= 34 cons: SEQUENCE
2:d=1 hl=2 l= 15 prim: INTEGER :D8BBE81DBD2E3A576952570B88D6
19:d=1 hl=2 l= 15 prim: INTEGER :B655B2C4FB75815E84B67BC4356E
