This test exercises using a different hash function parameter to the mask gen
function (SHA-256 for the hash, but SHA-512 for the MGF1 hash).

This test data was constructed manually by calling signing functions from
OpenSSL code.

It constructs an RSASSA-PSS signature using:
  * Key with modulus 1024 bit
  * Salt length 33 bytes
  * Digest function of SHA-256
  * Mask gen function of MGF1 with SHA-512


$ 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-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQClbkoOcBAXWJpRh9x+qEHRVvLsDjatUqRN/rH
mH3rZkdjFEFb/7bFitMDyg6EqiKOU3/Umq3KRy7MHzqv84LHf1c2VCAltWyuLbfXWce9jd8CSHL
I8Jwpw4lmOb/idGfEFrMLT8Ms18pKA4Thrb2TE7yLh4fINDOjP+yJJvZohNwIDAQAB
-----END PUBLIC KEY-----

$ openssl asn1parse -i < [ALGORITHM]
    0:d=0  hl=2 l=  65 cons: SEQUENCE          
    2:d=1  hl=2 l=   9 prim:  OBJECT            :rsassaPss
   13:d=1  hl=2 l=  52 cons:  SEQUENCE          
   15:d=2  hl=2 l=  15 cons:   cont [ 0 ]        
   17:d=3  hl=2 l=  13 cons:    SEQUENCE          
   19:d=4  hl=2 l=   9 prim:     OBJECT            :sha256
   30:d=4  hl=2 l=   0 prim:     NULL              
   32:d=2  hl=2 l=  28 cons:   cont [ 1 ]        
   34:d=3  hl=2 l=  26 cons:    SEQUENCE          
   36:d=4  hl=2 l=   9 prim:     OBJECT            :mgf1
   47:d=4  hl=2 l=  13 cons:     SEQUENCE          
   49:d=5  hl=2 l=   9 prim:      OBJECT            :sha512
   60:d=5  hl=2 l=   0 prim:      NULL              
   62:d=2  hl=2 l=   3 cons:   cont [ 2 ]        
   64:d=3  hl=2 l=   1 prim:    INTEGER           :21
-----BEGIN ALGORITHM-----
MEEGCSqGSIb3DQEBCjA0oA8wDQYJYIZIAWUDBAIBBQChHDAaBgkqhkiG9w0BAQgwDQYJYIZIAWU
DBAIDBQCiAwIBIQ==
-----END ALGORITHM-----

-----BEGIN DATA-----
VGVzdCBtZXNzYWdlIHRvIGJlIHNpZ25lZC4uLg==
-----END DATA-----

$ openssl asn1parse -i < [SIGNATURE]
    0:d=0  hl=3 l= 129 prim: BIT STRING        
-----BEGIN SIGNATURE-----
A4GBAFob0HSC5uuTqKu4J/lj+5bDa+Hhij4H3klWnvt6Yc+wwPza7/UC4lgGGyvZqD32RUEdt7v
Z14qqYNk53b5aj4C2gBMvLzV7Pay4mmQM4DSWa5JHMxTILqE3DDqihrbMcBw2q3XAsLcjeqLWQ9
yp8tfnV21h98qsCLtErrxZWHRr
-----END SIGNATURE-----