Public Key:

-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAt1AFVpOiXwGfbqNrOaD4 5pCodARp7NMTy4v5eUiVMc+jeUaQQ8Nu8n7zhnlL6kZRvllsmLv8ylH2hqMnXdBh 4nlQ4OWpp1QYpr6yD/SgOfvAHPa/OGYxsIGGJyoB3CdR3QG3KhjG7BGjdkJeq1f2 SnipAP3PMIDS8t7BXIeXq5fMVvFrZseqd7sWlsDliwDMGlBsOI1U7aRMVrZCkb9Y jRu6DRkvcnLNFHy2Uqfm+kOn+WlUMHsCDachDvmtocU98ATVLsdrDMpjz56x0bz7 gd9n9K9oz5IOZz5lX+oRlZ7VIVCMwveX8XYMabj8EPKVEr5L7bRBngGiFu1CaVKM CwIDAQAB -----END PUBLIC KEY----- 

Message 1:

Miss Scarlett did it in the Billiard room with the revolver. 

Message 2:

Professor Plum did it in the Dining room with the candlestick. 

Message 3:

Mrs. Peacock did it in the Conservatory with the lead pipe. 

Instructor's Private Key:

-----BEGIN RSA PRIVATE KEY----- MIIEowIBAAKCAQEAt1AFVpOiXwGfbqNrOaD45pCodARp7NMTy4v5eUiVMc+jeUaQ Q8Nu8n7zhnlL6kZRvllsmLv8ylH2hqMnXdBh4nlQ4OWpp1QYpr6yD/SgOfvAHPa/ OGYxsIGGJyoB3CdR3QG3KhjG7BGjdkJeq1f2SnipAP3PMIDS8t7BXIeXq5fMVvFr Zseqd7sWlsDliwDMGlBsOI1U7aRMVrZCkb9YjRu6DRkvcnLNFHy2Uqfm+kOn+WlU MHsCDachDvmtocU98ATVLsdrDMpjz56x0bz7gd9n9K9oz5IOZz5lX+oRlZ7VIVCM wveX8XYMabj8EPKVEr5L7bRBngGiFu1CaVKMCwIDAQABAoIBAGQodMI5KB6A5Huv DocOTPCtWV0KjFW5frdYY5bA8cOlj8xTob9kqNoWQzjWTYRTp5Y5hfxtulFRN0GZ I4k+sjzrzCUVVvz2FgIFb4UIRANqai1pJFHMhJnMK2B6s0l2smPu7AU0RHv3pziW SuOTzB4kjzLberklqhzJWR0VeOlnuoQvMEvufdjzY32Tbx0mwBGvQndIy4r4/mjb 7Iuft7BjzkPPyGw4B2bMZEoNscySXwf/Gl0mwcGIzDRwmi7zzPVsECtexuY3laDF dky8mjEjO1UoiNnHJ0Ea2ppImnko6tIPePq5+4aDc5YVfKxVZbUzNhlGU8V7LkLq pVZnuQECgYEA385awco8l25VC/fox/q4r4O7qtTpLYPwb8gtLslJ/E6k+sXMzsNP hxh2hO5qhKNzwUSYqacoJQY2IBvJoW5ckq7n8KS2FFTUUcL/md68cakVk8fH8rNL yuuqcx0KBr72Vg+tn/Ea8JQd8wDNH0/N5zkyCfpnZr93pdy8zyvGps8CgYEA0a5+ 88ULk44xrWMy2UUWQilYcX/tzK0osugG+srjJiNFke0suBrjTgAAKl4pvTQ8tylG eAD3IdTOeYjUbs5rNvhpfhvrdcvgI0Ma7M8tjsgbLw3DVDwwSzO6LrxVBu/MnU2d 0CZflUmtPvmr5lmbg3NV9P4UBnskuarML/kMlgUCgYAPOVA/ImyguGacm85/2/Q4 LDPV2QnLiNAQKoO4TQT1XrwmOtJFtk9wlx9ox3cDcsLrAKmJ0M8QRa3k3T8H9iPh 7nfkjK++Dk8rCKKuatJSwPewx8Q4JC4hrYo4rl8COnczP3nGCXaVqt2mrAVH/fu5 oNBgkWH7QUb4R12okge/TQKBgBSTWfPTzyoAlxFbnZ7Cb8e4ROyGUDB4gXjk2eJ8 TEPuzCHgszWxtcJur5V4vgHKAXc7vqWB+r5AIq68ZZQl/1FamQd99+IMSodLS3YX cnIDYt+AKz211kta3Rc+9d0DZQG+nxDQ4ypEG5MFbv/gpSkGBVZQJGjqZpUtlHHU r459AoGBALKouDnIh44hIEbBuihIcloxBwnZe9kYp79e3hOnNu8q6YsK3qqQbJgp fO9Dnl3PK2C1LgL1xwPwKmMUZC85JdM8C7iKtBzX9R3ul22rn4rKT/pb6z+/Pml5 S2SSLTyvDg5gMypSSgHHkA3YbzH0Nt0C7BYHukVxP6GBAHEMTJAn -----END RSA PRIVATE KEY----- 

The Output from the image:

$ base64 msg.sha256.sig > msg.sha256.sig.base64 $ cat msg.sha256.sig.base64 WsIg91LtkSlUo1E95bHVn2WeZ6+WgwD0Vg6KxCzBnbIizkquT8enk3RUbbW7N4XTARdxknHitCN6 p6zk54isVe8mZk1jlJqHQqqlKiMge4O6VoIUc8iZ0Qw3CmferBj20SIyW3lCAmmn9+N1ER8QEiPF 4zUJVRpjqeP61UaD/8gPiEBPbTZoMGe34vzCajPO6b0F7C5H5AqO2YjdgPl1qp15lAd8JInVZ01E oCj/dltxsLM9PN9GbGixbRliugcyIIiwum1rLZd8e5MiqSfJ12AA/MCqqg64cE2gdu3Wt9SL1Dj9 lqsSkT/zqPZxhR6VUXf3GBA67rRofi+VhrQC8g== 

. Ensure that you have installed OpenSSL 2. The instructor has a new keypair. Here is the public key instructor-ublicapem Here are three messages with signatures (the result of signing the SHA-256 hash of the message): o message 1 (signature) o message 2 (signature) o message 3 (signature) (this is from Clue/Cluedo) Only one of the signatures has been made with the instructor's private key. Which message is it? Put your answer (as either "1", "2",or "3") in a file called answer2.txt in the labo3 directory, then add that file to your Git repository using the command git add anawer2.txt 3. By nefarious means you manage to find the instructor's private key instructor-private.pem. Use it to sign a new message (you should use a SHA-256 hash of the file contents as described in worksheet 2) The resulting signature contains non-printable characters. You can encode it using printable characters with the Base 64 encoding scheme (the same idea as ASCII armor and PEM encoding). For example, if your signature is in the file msg.sha256.sig, you could encode it and view the output with: $base64 msg.sha256.sig > msg.sha256.sig.base64 cat msg.sha256.sig.base64 Run git add msgsha256.sig.base64 to add the file to your Git repository . Ensure that you have installed OpenSSL 2. The instructor has a new keypair. Here is the public key instructor-ublicapem Here are three messages with signatures (the result of signing the SHA-256 hash of the message): o message 1 (signature) o message 2 (signature) o message 3 (signature) (this is from Clue/Cluedo) Only one of the signatures has been made with the instructor's private key. Which message is it? Put your answer (as either "1", "2",or "3") in a file called answer2.txt in the labo3 directory, then add that file to your Git repository using the command git add anawer2.txt 3. By nefarious means you manage to find the instructor's private key instructor-private.pem. Use it to sign a new message (you should use a SHA-256 hash of the file contents as described in worksheet 2) The resulting signature contains non-printable characters. You can encode it using printable characters with the Base 64 encoding scheme (the same idea as ASCII armor and PEM encoding). For example, if your signature is in the file msg.sha256.sig, you could encode it and view the output with: $base64 msg.sha256.sig > msg.sha256.sig.base64 cat msg.sha256.sig.base64 Run git add msgsha256.sig.base64 to add the file to your Git repository