[webcrypto] Import WebKit's webcrypto tests.

LayoutTests/crypto/rsassa-pkcs1-v1_5-sign-verify-expected.txt

Index: LayoutTests/crypto/rsassa-pkcs1-v1_5-sign-verify-expected.txt
diff --git a/LayoutTests/crypto/rsassa-pkcs1-v1_5-sign-verify-expected.txt b/LayoutTests/crypto/rsassa-pkcs1-v1_5-sign-verify-expected.txt
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index 0000000000000000000000000000000000000000..3966c8638437f8dc3fddf3018631ed73ee1e0cc9
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+++ b/LayoutTests/crypto/rsassa-pkcs1-v1_5-sign-verify-expected.txt
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+Test importing an RSA key for RSASSA-PKCS1-v1_5.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+Importing a public key...
+
+Importing a private key...
+
+Signing some text...
+PASS bytesToHexString(new Uint8Array(signature)) is '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'
+
+Verifying the signature...
+PASS verificationResult is true
+
+Verifying a bad signature...
+PASS verificationResult is false
+PASS successfullyParsed is true
+
+TEST COMPLETE
+