This test specified a valid RSA PKCS#1 v.1.5 signature and RSA key (the same as rsa-pkcs1-sha256.pem).

The problem however is the signature algorithm is indicated as being ECDSA.

Signature verification consequently should fail.


$ openssl asn1parse -i < [PUBLIC KEY]
    0:d=0  hl=3 l= 159 cons: SEQUENCE          
    3:d=1  hl=2 l=  13 cons:  SEQUENCE          
    5:d=2  hl=2 l=   9 prim:   OBJECT            :rsaEncryption
   16:d=2  hl=2 l=   0 prim:   NULL              
   18:d=1  hl=3 l= 141 prim:  BIT STRING        
-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCqR+B2Mj1irNp1JnY2zQIQRQPz7ybs6mUjHT3
hf5APyaig2u6fBPThqxssgg0YviqIj/70hVK/JXcqP1zgR5AhsA0agnwAjfB/ow4EH+3HEYV52q
pxN98pUxC+1l2hgVtn8xCS/JGyjK+6dv+lZw3ixJoX2RjVtdJ4/cn318EhhQIDAQAB
-----END PUBLIC KEY-----

$ openssl asn1parse -i < [ALGORITHM]
    0:d=0  hl=2 l=  10 cons: SEQUENCE          
    2:d=1  hl=2 l=   8 prim:  OBJECT            :ecdsa-with-SHA256
-----BEGIN ALGORITHM-----
MAoGCCqGSM49BAMC
-----END ALGORITHM-----

-----BEGIN DATA-----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-----END DATA-----

$ openssl asn1parse -i < [SIGNATURE]
    0:d=0  hl=3 l= 129 prim: BIT STRING        
-----BEGIN SIGNATURE-----
A4GBADrHSmFSJw/Gv7hs5PNzpaJwAri/sitarIZfzN/SjR+n8L8yeTEoiDb1+BkxlFvXvPHTaOK
oO3WlslNNOxh1W5/JkYYGOUkCcyIjnln6qS560imcr3VNjomT/M8M2Iss+rJiKau1TRuaP7H8i6
+Gqf3saGdr8/LnvFAdNQvkalQt
-----END SIGNATURE-----