smart card encryption key I had setup a working smart card setup, where the local key ring solely contained public subkeys and secret keys resided on a smart card. Conservatively I set the expiration date to 1 year. Setup worked nicely and as the keys approached there expiration date, I proceeded as follows to attempt to extend their expiration date: Kill running gpg-agent:
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0 · What Is a Smart Card? Definition and Guide
1 · Understanding and Evaluating Virtual Smart Cards
2 · Smart Card
3 · Evaluate Virtual Smart Card Security
4 · EMV Key Management – Explained
IC Cards (Integrated Circuit Card) are also called Smart Cards, Intelligent Cards, .
By utilizing TPM devices that provide the same cryptographic capabilities as .
2. Most cryptographic smart cards are able to generate keys in the card in addition to storing externally generated plaintext keys, that's the main purpose of cryptographic smart cards. Some cards don't allow importing plaintext keys, some allow exporting keys generated on the card, some card can do import/export of wrapped (encrypted with .
I am working on a use-case where OpenPGP is being used to generate a public key pair on a smart card (Yubikey). The smart card is then to be shipped off to the user. Trying to emulate this locally the following is being done: generate keys on smart card; remove GnuPG home directory; access smart card to re-generate GnuPG home directory
Generating or verifying an authentication cryptogram uses the S-ENC session key and the signing method described in appendix B.1.2.1 - Full Triple DES. The DEK - or a key derived from the given DEK - is uses for additional encryption of confidential data, such as keys. It would for instance allow for wrapping of keys within a Hardware Security .
Part of the secret will need secure storage for itself, which depending on attacking potential might be in an encrypted file (with a completely different key) on disk, or in the extreme case, on a special smart card like device called a security module, which may have hardware resistance against tampering. (If not preventing the attack at least .
I had setup a working smart card setup, where the local key ring solely contained public subkeys and secret keys resided on a smart card. Conservatively I set the expiration date to 1 year. Setup worked nicely and as the keys approached there expiration date, I proceeded as follows to attempt to extend their expiration date: Kill running gpg-agent: I think the below code will be able to use the smart card container and read the private key. But I am not sure how to provide the public key to this and decrypt the email. CspParameters csp = new CspParameters(1, "Microsoft Base Smart Card Crypto Provider"); // CspParameters csp = new CspParameters(1, "Microsoft Strong Cryptographic Provider"); It generally works. I have my public key in .asc format and managed to load it into org.bouncycastle.openpgp. Connect to the smart card in the USB dongle using javax.smartcardio APIs. Select the OpenPGP applet. val pgpAID = bytes(0xD2, 0x76, 0x00, 0x01, 0x24, 0x01) val answer = cardChannel.transmit(CommandAPDU(0x00, 0xA4, 0x04, 0x00, pgpAID . There are several solutions which you can use to communicate with your smart card via this library. Such as: pkcs11-tool (CLI interface), PyKCS11 (python wrapper). Here is an example how it could be achieved with PyKCS11: # get slot value via pkcs11.getSlotList(tokenPresent=False). Usually it's 0.
If you create the byte[] with the SecretKeySpec then the key must come from memory. That means that the key may be put in the secure token, but that the key is exposed in memory regardless. Normally, secure tokens only work with keys that are either generated in the secure token or are injected by e.g. a smart card or a key ceremony. So these are the steps I use to debug a smart card 1) Open Smart Card with Window and read the card with a file explorer. Once card is open with explorer it will stay open until you turn off machine. 2) Read Card from a c# application (after unlocking with explorer) to verify the size of the address and data 3) Unlock card with c# application. 2. Most cryptographic smart cards are able to generate keys in the card in addition to storing externally generated plaintext keys, that's the main purpose of cryptographic smart cards. Some cards don't allow importing plaintext keys, some allow exporting keys generated on the card, some card can do import/export of wrapped (encrypted with .
I am working on a use-case where OpenPGP is being used to generate a public key pair on a smart card (Yubikey). The smart card is then to be shipped off to the user. Trying to emulate this locally the following is being done: generate keys on smart card; remove GnuPG home directory; access smart card to re-generate GnuPG home directory Generating or verifying an authentication cryptogram uses the S-ENC session key and the signing method described in appendix B.1.2.1 - Full Triple DES. The DEK - or a key derived from the given DEK - is uses for additional encryption of confidential data, such as keys. It would for instance allow for wrapping of keys within a Hardware Security . Part of the secret will need secure storage for itself, which depending on attacking potential might be in an encrypted file (with a completely different key) on disk, or in the extreme case, on a special smart card like device called a security module, which may have hardware resistance against tampering. (If not preventing the attack at least .I had setup a working smart card setup, where the local key ring solely contained public subkeys and secret keys resided on a smart card. Conservatively I set the expiration date to 1 year. Setup worked nicely and as the keys approached there expiration date, I proceeded as follows to attempt to extend their expiration date: Kill running gpg-agent:
I think the below code will be able to use the smart card container and read the private key. But I am not sure how to provide the public key to this and decrypt the email. CspParameters csp = new CspParameters(1, "Microsoft Base Smart Card Crypto Provider"); // CspParameters csp = new CspParameters(1, "Microsoft Strong Cryptographic Provider");
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It generally works. I have my public key in .asc format and managed to load it into org.bouncycastle.openpgp. Connect to the smart card in the USB dongle using javax.smartcardio APIs. Select the OpenPGP applet. val pgpAID = bytes(0xD2, 0x76, 0x00, 0x01, 0x24, 0x01) val answer = cardChannel.transmit(CommandAPDU(0x00, 0xA4, 0x04, 0x00, pgpAID .
There are several solutions which you can use to communicate with your smart card via this library. Such as: pkcs11-tool (CLI interface), PyKCS11 (python wrapper). Here is an example how it could be achieved with PyKCS11: # get slot value via pkcs11.getSlotList(tokenPresent=False). Usually it's 0. If you create the byte[] with the SecretKeySpec then the key must come from memory. That means that the key may be put in the secure token, but that the key is exposed in memory regardless. Normally, secure tokens only work with keys that are either generated in the secure token or are injected by e.g. a smart card or a key ceremony.
What Is a Smart Card? Definition and Guide
Understanding and Evaluating Virtual Smart Cards
Smart Card
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smart card encryption key|Evaluate Virtual Smart Card Security