Implement VerifySignedData() for ECDSA, RSA PKCS#1 and RSA PSS.

net/data/verify_signed_data_unittest/ecdsa-prime256v1-sha512-using-ecdh-key.pem

+This uses the same test data as ecdsa-prime256v1-sha512.pem, HOWEVER the
+algorithm OID for the public key has been changed from id-ecPublicKey
+(1.2.840.10045.2.1) to id-ecDH (1.3.132.1.12)
+
+This test should fail because the public key's algorithm does not match that of
+the signature algorithm.
+
+
+
+-----BEGIN PUBLIC KEY-----
+MFcwEQYFK4EEAQwGCCqGSM49AwEHA0IABJywz2kwPa/HYdTkaHtOzwOebTSrlkr4CBDY1VikqNb
+3LVEjOheIkgqG7gihlix576MX+3h54pfa0hRtuZX6HHg=
+-----END PUBLIC KEY-----
+
+$ openssl asn1parse -i < [PUBLIC KEY]
+    0:d=0  hl=2 l=  87 cons: SEQUENCE          
+    2:d=1  hl=2 l=  17 cons:  SEQUENCE          
+    4:d=2  hl=2 l=   5 prim:   OBJECT            :1.3.132.1.12
+   11:d=2  hl=2 l=   8 prim:   OBJECT            :prime256v1
+   21: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-----
+A0cAMEQCIEufkeQoUocmGh0ckjz2Gc1SwXXP5/G+YKUljGEDSLo9AiAoxF+QHXHEGymGOOwNaoX
+X/LDDO7/sWpyBCEa2OSiahA==
+-----END SIGNATURE-----
+
+$ openssl asn1parse -i < [SIGNATURE]
+    0:d=0  hl=2 l=  71 prim: BIT STRING