This is the same as ecdsa-prime256v1-sha512.pem, except the signature is wrong.

Rather than encoding the signature into a DER-encoded Ecdsa-Sig-Value, it is a
concatenation of the r and s values. This is the format that WebCrypto uses for
ECDSA signature, but not what is used for digital signatures.


-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEnLDPaTA9r8dh1ORoe07PA55tNKuWSvgIENjVWKS
o1vctUSM6F4iSCobuCKGWLHnvoxf7eHnil9rSFG25lfoceA==
-----END PUBLIC KEY-----

$ openssl asn1parse -i < [PUBLIC KEY]
    0:d=0  hl=2 l=  89 cons: SEQUENCE          
    2:d=1  hl=2 l=  19 cons:  SEQUENCE          
    4:d=2  hl=2 l=   7 prim:   OBJECT            :id-ecPublicKey
   13:d=2  hl=2 l=   8 prim:   OBJECT            :prime256v1
   23:d=1  hl=2 l=  66 prim:  BIT STRING        


-----BEGIN ALGORITHM-----
MAoGCCqGSM49BAME
-----END ALGORITHM-----

$ openssl asn1parse -i < [ALGORITHM]
    0:d=0  hl=2 l=  10 cons: SEQUENCE          
    2:d=1  hl=2 l=   8 prim:  OBJECT            :ecdsa-with-SHA512


-----BEGIN DATA-----
bikyFTMBpO72gOZCiSmtrpiMEI1mijH/VdBImUfXX/gaRr+J6E1kAfAjvm6HaI+814TXhcqEZzV
SSstS0ARSyEBApHnnzDMJNkQdk7vnIqlDKm4dsRK1yUA7ECcssTR/1hnUY/ep0iOtdv3gbYpog1
APuEMjWr/5jiQb37VTjD4=
-----END DATA-----


-----BEGIN SIGNATURE-----
A0EAS5+R5ChShyYaHRySPPYZzVLBdc/n8b5gpSWMYQNIuj0oxF+QHXHEGymGOOwNaoXX/LDDO7/
sWpyBCEa2OSiahA==
-----END SIGNATURE-----

$ openssl asn1parse -i < [SIGNATURE]
    0:d=0  hl=2 l=  65 prim: BIT STRING