add tests for decode_n() with base64

src/tests/base64_n.vtc

+# looks like -*- perl -*-
+
+varnishtest "base64 decode_n()"
+
+varnish v1 -vcl {
+	import blobcode from "${vmod_topbuild}/src/.libs/libvmod_blobcode.so";
+	backend b { .host = "${bad_ip}"; }
+
+	sub vcl_recv {
+	  return(synth(200));
+	}
+
+	sub vcl_synth {
+	    set req.http.foobarbazquux = "L0hlbGxvIHdvcmxkLw==";
+	    set req.http.pangram
+	      = "VGhlIHF1aWNrIGJyb3duIGZveCBqdW1wcyBvdmVyIHRoZSBsYXp5IGRvZw==";
+	    set req.http.hobbes =
+{"TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlzIHNpbmd1bGFyIHBhc3Npb24gZnJvbSBvdGhlciBhbmltYWxzLCB3aGljaCBpcyBhIGx1c3Qgb2YgdGhlIG1pbmQsIHRoYXQgYnkgYSBwZXJzZXZlcmFuY2Ugb2YgZGVsaWdodCBpbiB0aGUgY29udGludWVkIGFuZCBpbmRlZmF0aWdhYmxlIGdlbmVyYXRpb24gb2Yga25vd2xlZGdlLCBleGNlZWRzIHRoZSBzaG9ydCB2ZWhlbWVuY2Ugb2YgYW55IGNhcm5hbCBwbGVhc3VyZS4="};
+	    set req.http.hobbesnopad = regsuball(req.http.hobbes, "=", "");
+	    set req.http.all =
+{"AAAABBBBCCCCDDDDEEEEFFFFGGGGHHHHIIIIJJJJKKKKLLLLMMMMNNNNOOOOPPPPQQQQRRRRSSSSTTTTUUUUVVVVWWWWXXXXYYYYZZZZaaaabbbbccccddddeeeeffffgggghhhhiiiijjjjkkkkllllmmmmnnnnooooppppqqqqrrrrssssttttuuuuvvvvwwwwxxxxyyyyzzzz0000111122223333444455556666777788889999++++////"};
+	    set req.http.allurl =
+{"AAAABBBBCCCCDDDDEEEEFFFFGGGGHHHHIIIIJJJJKKKKLLLLMMMMNNNNOOOOPPPPQQQQRRRRSSSSTTTTUUUUVVVVWWWWXXXXYYYYZZZZaaaabbbbccccddddeeeeffffgggghhhhiiiijjjjkkkkllllmmmmnnnnooooppppqqqqrrrrssssttttuuuuvvvvwwwwxxxxyyyyzzzz0000111122223333444455556666777788889999----____"};
+
+	    set resp.http.dec
+              = blobcode.encode(IDENTITY,
+				blobcode.decode_n(8, BASE64,
+						  req.http.foobarbazquux));
+
+	    set resp.http.deceq
+              = blobcode.encode(IDENTITY,
+				blobcode.decode_n(20, BASE64,
+						  req.http.foobarbazquux));
+
+	    set resp.http.declong
+              = blobcode.encode(IDENTITY,
+				blobcode.decode_n(30, BASE64,
+						  req.http.foobarbazquux));
+
+	    set resp.http.dec2
+	      = blobcode.encode(IDENTITY,
+				blobcode.decode_n(12, BASE64, req.http.pangram));
+
+	    set resp.http.b64dechobbes =
+              blobcode.encode(IDENTITY,
+			      blobcode.decode_n(24, BASE64, req.http.hobbes));
+
+	    set resp.http.b64decall =
+               blobcode.encode(HEXLC, blobcode.decode_n(128, BASE64,
+					                req.http.all));
+
+	    set resp.http.urldechobbes =
+              blobcode.encode(IDENTITY, blobcode.decode_n(180, BASE64URL,
+						          req.http.hobbes));
+
+	    set resp.http.urldecall =
+              blobcode.encode(HEXLC,
+			      blobcode.decode_n(256, BASE64URL,
+						req.http.allurl));
+
+	    set resp.http.nopaddechobbes =
+	      blobcode.encode(IDENTITY,
+		              blobcode.decode_n(500, BASE64URLNOPAD,
+						req.http.hobbesnopad));
+
+	    set resp.http.nopaddecall =
+	      blobcode.encode(HEXLC,
+			      blobcode.decode_n(256, BASE64URLNOPAD,
+						req.http.allurl));
+
+	    set resp.http.b64empty =
+	      blobcode.encode(IDENTITY, blobcode.decode_n(0, BASE64, ""));
+	    set resp.http.urlempty =
+	      blobcode.encode(IDENTITY, blobcode.decode_n(1, BASE64URL, ""));
+	    set resp.http.nopadempty =
+	        blobcode.encode(IDENTITY,
+				blobcode.decode_n(0, BASE64URLNOPAD, ""));
+	    set resp.http.emptypieces =
+	      blobcode.encode(IDENTITY,
+	      blobcode.decode_n(0, BASE64, req.http.unset + "" + req.http.unset
+				           + "" + req.http.unset + ""));
+
+            set resp.http.decenc
+	      = blobcode.encode(BASE64,
+				blobcode.decode_n(20, BASE64,
+						  req.http.foobarbazquux));
+
+	    set resp.http.l = "L";
+	    set resp.http.dec2pieces
+	      = blobcode.encode(IDENTITY, blobcode.decode_n(8, BASE64,
+			        resp.http.l + "0hlbGxvIHdvcmxkLw=="));
+
+	    set resp.http.pad = "==";
+	    set resp.http.dec3pieces
+	      = blobcode.encode(IDENTITY, blobcode.decode_n(12, BASE64,
+			        resp.http.l + "0hlbGxvIHdvcmxkLw"
+			        + resp.http.pad));
+
+	    set resp.http.mid1 = "GxvI";
+	    set resp.http.mid2 = "dvcmx";
+	    set resp.http.dec7pieces
+	      = blobcode.encode(IDENTITY, blobcode.decode_n(16, BASE64,
+			        resp.http.l + "0hlb" + resp.http.mid1
+			        + "H" + resp.http.mid2 + "kLw"
+			        + resp.http.pad));
+
+	    set resp.http.dec7param
+	      = blobcode.encode(blob=blobcode.decode_n(encoded=resp.http.l
+				+ "0hlb" + resp.http.mid1 + "H" + resp.http.mid2
+				+ "kLw" + resp.http.pad, decoding=BASE64, n=20),
+			        encoding=IDENTITY);
+
+	    set resp.http.decnopad = blobcode.encode(IDENTITY,
+				     blobcode.decode_n(18, BASE64URLNOPAD,
+						       "L0hlbGxvIHdvcmxkLw"));
+
+	    set resp.http.decnopad2pieces
+	      = blobcode.encode(IDENTITY, blobcode.decode_n(19, BASE64URLNOPAD,
+			        resp.http.l + "0hlbGxvIHdvcmxkLw"));
+
+	    set resp.http.decnopad6pieces
+	      = blobcode.encode(IDENTITY, blobcode.decode_n(18, BASE64URLNOPAD,
+			        resp.http.l + "0hlb" + resp.http.mid1
+			        + "H" + resp.http.mid2 + "kLw"));
+
+	    set resp.http.decnopadlong
+	      = blobcode.encode(IDENTITY,
+		blobcode.decode_n(60, BASE64URLNOPAD,
+	        "VGhlIHF1aWNrIGJyb3duIGZveCBqdW1wcyBvdmVyIHRoZSBsYXp5IGRvZw"
+			       ));
+
+	}
+} -start
+
+client c1 {
+	txreq -url "/"
+	rxresp
+	expect resp.http.dec == "/Hello"
+	expect resp.http.deceq == "/Hello world/"
+	expect resp.http.declong == "/Hello world/"
+	expect resp.http.dec2 == "The quick"
+	expect resp.http.b64dechobbes == "Man is distinguish"
+	expect resp.http.b64decall == "0000000410410820820c30c31041041451451861861c71c720820824924928a28a2cb2cb30c30c34d34d38e38e3cf3cf4104104514514924924d34d35145145555555965965d75d761861865965969a69a6db6db71c71c75d75d79e79e7df7df"
+	expect resp.http.urldechobbes == "Man is distinguished, not only by his reason, but by this singular passion from other animals, which is a lust of the mind, that by a p"
+	expect resp.http.urldecall == "0000000410410820820c30c31041041451451861861c71c720820824924928a28a2cb2cb30c30c34d34d38e38e3cf3cf4104104514514924924d34d35145145555555965965d75d761861865965969a69a6db6db71c71c75d75d79e79e7df7df8208208618618a28a28e38e39249249659659a69a69e79e7a28a28a69a69aaaaaaaebaebb2cb2cb6db6dbaebaebefbefc30c30c71c71cb2cb2cf3cf3d34d34d75d75db6db6df7df7e38e38e79e79ebaebaefbefbf3cf3cf7df7dfbefbeffffff"
+	expect resp.http.nopaddechobbes == "Man is distinguished, not only by his reason, but by this singular passion from other animals, which is a lust of the mind, that by a perseverance of delight in the continued and indefatigable generation of knowledge, exceeds the short vehemence of any carnal pleasure."
+	expect resp.http.nopaddecall == "0000000410410820820c30c31041041451451861861c71c720820824924928a28a2cb2cb30c30c34d34d38e38e3cf3cf4104104514514924924d34d35145145555555965965d75d761861865965969a69a6db6db71c71c75d75d79e79e7df7df8208208618618a28a28e38e39249249659659a69a69e79e7a28a28a69a69aaaaaaaebaebb2cb2cb6db6dbaebaebefbefc30c30c71c71cb2cb2cf3cf3d34d34d75d75db6db6df7df7e38e38e79e79ebaebaefbefbf3cf3cf7df7dfbefbeffffff"
+	expect resp.http.b64empty == ""
+	expect resp.http.urlempty == ""
+	expect resp.http.nopadempty == ""
+	expect resp.http.emptypieces == ""
+	expect resp.http.decenc == "L0hlbGxvIHdvcmxkLw=="
+	expect resp.http.dec2pieces == "/Hello"
+	expect resp.http.dec3pieces == "/Hello wo"
+	expect resp.http.dec7pieces == "/Hello world"
+	expect resp.http.dec7param == "/Hello world/"
+	expect resp.http.decnopad == "/Hello world/"
+	expect resp.http.decnopad2pieces == "/Hello world/"
+	expect resp.http.decnopad6pieces == "/Hello world/"
+	expect resp.http.decnopadlong == "The quick brown fox jumps over the lazy dog"
+} -run
+
+varnish v1 -vcl {
+	import blobcode from "${vmod_topbuild}/src/.libs/libvmod_blobcode.so";
+	backend b { .host = "${bad_ip}"; }
+
+	sub vcl_recv {
+	  return(synth(200));
+	}
+
+	sub vcl_synth {
+	  set req.http.foo = "AAA=";
+	  set resp.http.bad64 = blobcode.encode(IDENTITY,
+				blobcode.decode(BASE64, "-_-_" + req.http.foo));
+	  set resp.http.badurl = blobcode.encode(IDENTITY,
+				 blobcode.decode(BASE64URL,
+						 "+/+/" + req.http.foo));
+	  set resp.http.badpad = blobcode.encode(IDENTITY,
+				 blobcode.decode(BASE64URLNOPAD,
+						 "TWFu" + req.http.foo));
+	}
+}
+
+client c1 {
+	txreq
+	rxresp
+	expect resp.http.bad64 == ""
+	expect resp.http.badurl == ""
+	expect resp.http.badpad == ""
+} -run
+
+logexpect l1 -v v1 -d 1 -g vxid -q "VCL_Error" {
+        expect 0 * Begin req
+        expect * = VCL_Error "^vmod blobcode error: cannot decode, illegal encoding beginning with \"-_-_\"$"
+#"
+        expect * = VCL_Error "^vmod blobcode error: cannot decode, illegal encoding beginning with \"\+/\+/\"$"
+#"
+        expect * = VCL_Error "^vmod blobcode error: cannot decode, illegal encoding beginning with \"TWFu\"$"
+#"
+	expect * = End
+} -start
+
+logexpect l1 -wait