Add RSA decrypt and OAEP tests.

Reviewed-by: NRich Salz <rsalz@openssl.org>

test/evptests.txt

@@ -2769,6 +2769,31 @@ Ctrl = digest:SHA1
 Input = "0123456789ABCDEF1234"
 Output = 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
 
+# RSA decrypt
+
+Decrypt = RSA-2048
+Input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
+Output = "Hello World"
+
+# Corrupted ciphertext
+Decrypt = RSA-2048
+Input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
+Output = "Hello World"
+Result = KEYOP_ERROR
+
+# OAEP padding
+Decrypt = RSA-2048
+Ctrl = rsa_padding_mode:oaep
+Input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
+Output = "Hello World"
+
+# OAEP padding, corrupted ciphertext
+Decrypt = RSA-2048
+Ctrl = rsa_padding_mode:oaep
+Input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
+Output = "Hello World"
+Result = KEYOP_ERROR
+
 # Illegal RSA key derivation
 Derive = RSA-2048
 Result = KEYOP_INIT_ERROR