Securely passing user authentication data between a pre-boot authentication environment and an operating system

1. An Information Handling System (IHS), comprising:

a processor; and

a Basic I/O System (BIOS) coupled to the processor, the BIOS having program instructions stored thereon that, upon execution by the processor, cause the IHS to:

identify an encrypted Single-Sign-On (SSO) token and a Trusted Platform Module (TPM) key pair provisioned by an Operating System (OS) and stored in an OS registry;

extract a TPM public key from the TPM key pair;

encrypt a pre-boot authentication (PBA) private key generated by a PBA application with the TPM public key;

store the encrypted PBA private key, the TPM key pair, and the encrypted SSO token in a shadow partition of a self-encrypting hard drive coupled to the IHS;

cause a power cycle of the IHS;

request that a user enter credentials into a logon application, wherein the credentials are the same as would be entered by the user to log onto the OS;

retrieve the PBA private key, the TPM key pair, and the encrypted SSO token from the shadow partition using the credentials;

use the TPM public key from the TPM key pair to decrypt the encrypted PBA private key; and

use the decrypted SSO token to unlock the self-encrypting hard drive.

2. The IHS of claim 1 , wherein the program instructions, upon execution, further cause a redirecting of commands issued by the OS and targeting the OS registry to the PBA application.

3. The IHS of claim 1 , wherein the power cycle stops electrical power from being provided to the self-encrypting hard drive.

4. The IHS of claim 1 , wherein the program instructions, upon execution, further cause the IHS to provide the decrypted SSO token in response to an OS inquiry into the OS registry, and use the decrypted SSO token to log into the OS.

5. A memory device having program instructions stored thereon that, upon execution by a processor of an Information Handling System (IHS), cause the IHS system to:

identify an encrypted Single-Sign-On (SSO) token and a Trusted Platform Module (TPM) key pair provisioned by an Operating System (OS) and stored in an OS registry;

extract a TPM public key from the TPM key pair;

encrypt a pre-boot authentication (PBA) private key generated by a PBA application with the TPM public key;

store the encrypted PBA private key, the TPM key pair, and the encrypted SSO token in a shadow partition of a self-encrypting hard drive;

stop electrical power from being provided to the self-encrypting hard drive;

request that a user enter credentials into a logon application, wherein the credentials are the same as would be entered by the user to log onto the OS;

retrieve the PBA private key, the TPM key pair, and the encrypted SSO token from the shadow partition using the credentials;

use the TPM public key from the TPM key pair to decrypt the encrypted PBA private key;

use the decrypted PBA private key to decrypt the SSO token; and

use the decrypted SSO token to unlock the self-encrypting hard drive.

6. The memory device of claim 5 , wherein the program instructions, upon execution, further cause the IHS to provide the decrypted SSO token in response to an OS inquiry into the OS registry, and use the decrypted SSO token to log into the OS.

7. A method, comprising:

identifying an encrypted Single-Sign-On (SSO) token and a Trusted Platform Module (TPM) key pair provisioned by an Operating System (OS) and stored in an OS registry;

extracting a TPM public key from the TPM key pair;

encrypting a pre-boot authentication (PBA) private key generated by a PBA application with the TPM public key;

storing the encrypted PBA private key, the TPM key pair, and the encrypted SSO token in a shadow partition of a self-encrypting hard drive;

stopping electrical power from being provided to the self-encrypting hard drive;

requesting that a user enter credentials into a logon application;

retrieving the PBA private key, the TPM key pair, and the encrypted SSO token from the shadow partition using the credentials;

using the TPM public key from the TPM key pair to decrypt the encrypted PBA private key;

using the decrypted PBA private key to decrypt the SSO token;

using the decrypted SSO token to unlock the self-encrypting hard drive; and

using the decrypted SSO token to log into the OS.