1This is the same test as ecdsa-prime256v1-sha512.pem except the public key's 2algorithm has been tampered with. The parameters for ecPublicKey should be a 3namedCurve, but here they have been replaced by NULL. 4 5 6 7-----BEGIN PUBLIC KEY----- 8MFEwCwYHKoZIzj0CAQUAA0IABJywz2kwPa/HYdTkaHtOzwOebTSrlkr4CBDY1VikqNb3LVEjOhe 9IkgqG7gihlix576MX+3h54pfa0hRtuZX6HHg= 10-----END PUBLIC KEY----- 11 12$ openssl asn1parse -i < [PUBLIC KEY] 13 0:d=0 hl=2 l= 81 cons: SEQUENCE 14 2:d=1 hl=2 l= 11 cons: SEQUENCE 15 4:d=2 hl=2 l= 7 prim: OBJECT :id-ecPublicKey 16 13:d=2 hl=2 l= 0 prim: NULL 17 15:d=1 hl=2 l= 66 prim: BIT STRING 18 19 20 21-----BEGIN ALGORITHM----- 22MAoGCCqGSM49BAME 23-----END ALGORITHM----- 24 25$ openssl asn1parse -i < [ALGORITHM] 26 0:d=0 hl=2 l= 10 cons: SEQUENCE 27 2:d=1 hl=2 l= 8 prim: OBJECT :ecdsa-with-SHA512 28 29 30 31-----BEGIN DATA----- 32bikyFTMBpO72gOZCiSmtrpiMEI1mijH/VdBImUfXX/gaRr+J6E1kAfAjvm6HaI+814TXhcqEZzV 33SSstS0ARSyEBApHnnzDMJNkQdk7vnIqlDKm4dsRK1yUA7ECcssTR/1hnUY/ep0iOtdv3gbYpog1 34APuEMjWr/5jiQb37VTjD4= 35-----END DATA----- 36 37 38 39-----BEGIN SIGNATURE----- 40A0cAMEQCIEufkeQoUocmGh0ckjz2Gc1SwXXP5/G+YKUljGEDSLo9AiAoxF+QHXHEGymGOOwNaoX 41X/LDDO7/sWpyBCEa2OSiahA== 42-----END SIGNATURE----- 43 44$ openssl asn1parse -i < [SIGNATURE] 45 0:d=0 hl=2 l= 71 prim: BIT STRING 46