1The key, message, and signature come from:
2http://csrc.nist.gov/groups/STM/cavp/documents/dss/186-3ecdsatestvectors.zip (SigVer.rsp)
3
4The algorithm DER was synthesized to match, and the signature (provided as an r
5and s tuple) was encoded into a Ecdsa-Sig-Value and then a BIT STRING.
6
7It uses ECDSA verification, using curve prime256v1 and SHA-512
8
9
10$ openssl asn1parse -i < [PUBLIC KEY]
11    0:d=0  hl=2 l=  89 cons: SEQUENCE
12    2:d=1  hl=2 l=  19 cons:  SEQUENCE
13    4:d=2  hl=2 l=   7 prim:   OBJECT            :id-ecPublicKey
14   13:d=2  hl=2 l=   8 prim:   OBJECT            :prime256v1
15   23:d=1  hl=2 l=  66 prim:  BIT STRING
16-----BEGIN PUBLIC KEY-----
17MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEnLDPaTA9r8dh1ORoe07PA55tNKuWSvgIENjVWKS
18o1vctUSM6F4iSCobuCKGWLHnvoxf7eHnil9rSFG25lfoceA==
19-----END PUBLIC KEY-----
20
21$ openssl asn1parse -i < [ALGORITHM]
22    0:d=0  hl=2 l=  10 cons: SEQUENCE
23    2:d=1  hl=2 l=   8 prim:  OBJECT            :ecdsa-with-SHA512
24-----BEGIN ALGORITHM-----
25MAoGCCqGSM49BAME
26-----END ALGORITHM-----
27
28-----BEGIN DATA-----
29bikyFTMBpO72gOZCiSmtrpiMEI1mijH/VdBImUfXX/gaRr+J6E1kAfAjvm6HaI+814TXhcqEZzV
30SSstS0ARSyEBApHnnzDMJNkQdk7vnIqlDKm4dsRK1yUA7ECcssTR/1hnUY/ep0iOtdv3gbYpog1
31APuEMjWr/5jiQb37VTjD4=
32-----END DATA-----
33
34$ openssl asn1parse -i < [SIGNATURE]
35    0:d=0  hl=2 l=  71 prim: BIT STRING
36-----BEGIN SIGNATURE-----
37A0cAMEQCIEufkeQoUocmGh0ckjz2Gc1SwXXP5/G+YKUljGEDSLo9AiAoxF+QHXHEGymGOOwNaoX
38X/LDDO7/sWpyBCEa2OSiahA==
39-----END SIGNATURE-----
40