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The key, message, and signature come from Example 1.1 of:
ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-1/pkcs-1v2-1-vec.zip (pss-vect.txt)
(The algorithm DER was synthesized to match, and the signature enclosed in a BIT STRING).
It uses an RSA key with modulus length of 1024 bits, PSS padding,
SHA-1 as the digest, MGF1 with SHA-1, and salt length of 20.
-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQClbkoOcBAXWJpRh9x+qEHRVvLsDjatUqRN/rH
mH3rZkdjFEFb/7bFitMDyg6EqiKOU3/Umq3KRy7MHzqv84LHf1c2VCAltWyuLbfXWce9jd8CSHL
I8Jwpw4lmOb/idGfEFrMLT8Ms18pKA4Thrb2TE7yLh4fINDOjP+yJJvZohNwIDAQAB
-----END PUBLIC KEY-----
$ 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 ALGORITHM-----
MA0GCSqGSIb3DQEBCjAA
-----END ALGORITHM-----
$ openssl asn1parse -i < [ALGORITHM]
0:d=0 hl=2 l= 13 cons: SEQUENCE
2:d=1 hl=2 l= 9 prim: OBJECT :rsassaPss
13:d=1 hl=2 l= 0 cons: SEQUENCE
-----BEGIN DATA-----
zch9oiPXht87ReC7vHITJtHuKvgGzDFUdcxvDZxm4bYjcdRc4jkuGskoRMMQEC8Vag2NUsH0xAu
jqmUJV4bLdpdXplY7qVj+0LzJhOi1F6PV9RWyO4pB50qoZ2k/kN+wYabobfqu5kRywA5fIJRXKc
vr538Gznjgj0CY+6QfnWGTwDF+i2DUtghKy0LSnjgIo7w3LYXjMRcPy/fMctC3HClmSLOk0Q9BY
pXQgHqmJcqydE/Z6o/SI8QlNwKYKL0WvgJUbxMP0uM7k20mduCK7RtzMYt1CgFn0A==
-----END DATA-----
-----BEGIN SIGNATURE-----
A4GBAJB0MI+1mOlwGyKUOI5S+XH6rCtgpRRa8YXfUoe17SiH5Xzn/UTchjTkB8jg5DYLwibz7CJ
/nZ5UY46NMfUFEhXfbrucL5V5qndZijj5FLW5wb2DxOL584Kg0Ko1Qv/uZZhKYBvGnrKN6yfcoS
yCwtTD9mzVAPH/K5lNik4wy7M8
-----END SIGNATURE-----
$ openssl asn1parse -i < [SIGNATURE]
0:d=0 hl=3 l= 129 prim: BIT STRING
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