1 This is the same test as ecdsa-prime256v1-sha512.pem, however the SIGNATURE has
2 been changed to a (valid) BIT STRING containing two unused bits.
4 Note that the last two bits of the original signature were 0, so the
5 DER-encoded bytes portion of the mutated BIT STRING remains the same. All that
6 changes is the octet at the start which indicates the number of unused bits.
8 In other words SIGNATURE changes from:
15 -----BEGIN PUBLIC KEY-----
16 MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEnLDPaTA9r8dh1ORoe07PA55tNKuWSvgIENjVWKS
17 o1vctUSM6F4iSCobuCKGWLHnvoxf7eHnil9rSFG25lfoceA==
18 -----END PUBLIC KEY-----
20 $ openssl asn1parse -i < [PUBLIC KEY]
21 0:d=0 hl=2 l= 89 cons: SEQUENCE
22 2:d=1 hl=2 l= 19 cons: SEQUENCE
23 4:d=2 hl=2 l= 7 prim: OBJECT :id-ecPublicKey
24 13:d=2 hl=2 l= 8 prim: OBJECT :prime256v1
25 23:d=1 hl=2 l= 66 prim: BIT STRING
29 -----BEGIN ALGORITHM-----
31 -----END ALGORITHM-----
33 $ openssl asn1parse -i < [ALGORITHM]
34 0:d=0 hl=2 l= 10 cons: SEQUENCE
35 2:d=1 hl=2 l= 8 prim: OBJECT :ecdsa-with-SHA512
40 bikyFTMBpO72gOZCiSmtrpiMEI1mijH/VdBImUfXX/gaRr+J6E1kAfAjvm6HaI+814TXhcqEZzV
41 SSstS0ARSyEBApHnnzDMJNkQdk7vnIqlDKm4dsRK1yUA7ECcssTR/1hnUY/ep0iOtdv3gbYpog1
42 APuEMjWr/5jiQb37VTjD4=
47 -----BEGIN SIGNATURE-----
48 A0cCMEQCIEufkeQoUocmGh0ckjz2Gc1SwXXP5/G+YKUljGEDSLo9AiAoxF+QHXHEGymGOOwNaoX
49 X/LDDO7/sWpyBCEa2OSiahA==
50 -----END SIGNATURE-----
52 $ openssl asn1parse -i < [SIGNATURE]
53 0:d=0 hl=2 l= 71 prim: BIT STRING