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

net/data/verify_signed_data_unittest/rsa-pss-sha1-wrong-salt.pem

Index: net/data/verify_signed_data_unittest/rsa-pss-sha1-wrong-salt.pem
diff --git a/net/data/verify_signed_data_unittest/rsa-pss-sha1-wrong-salt.pem b/net/data/verify_signed_data_unittest/rsa-pss-sha1-wrong-salt.pem
new file mode 100644
index 0000000000000000000000000000000000000000..57ec775f6e59ba9d8b52225b56412b7f2763b783
--- /dev/null
+++ b/net/data/verify_signed_data_unittest/rsa-pss-sha1-wrong-salt.pem
@@ -0,0 +1,51 @@
+Same as rsa-pss-sha1-wrong-salt.pem except the ALGORITHM has been changed to
+have a salt of 23. When verified using this algorithm it will fail, however if
+the default salt of 20 were used it would succeed.
+
+
+
+-----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-----
+MBIGCSqGSIb3DQEBCjAFogMCARc=
+-----END ALGORITHM-----
+
+$ openssl asn1parse -i < [ALGORITHM]
+    0:d=0  hl=2 l=  18 cons: SEQUENCE          
+    2:d=1  hl=2 l=   9 prim:  OBJECT            :rsassaPss
+   13:d=1  hl=2 l=   5 cons:  SEQUENCE          
+   15:d=2  hl=2 l=   3 cons:   cont [ 2 ]        
+   17:d=3  hl=2 l=   1 prim:    INTEGER           :17
+
+
+
+-----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