| /****************************************************************************** |
| * Filename: pka_doc.h |
| * Revised: 2017-06-05 12:13:49 +0200 (Mon, 05 Jun 2017) |
| * Revision: 49096 |
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| //! \addtogroup pka_api |
| //! @{ |
| //! \section sec_pka Introduction |
| //! |
| //! The PKA (Public Key Accelerator) API provides access to the Large Number |
| //! Engine (LNME). The LNME allows for efficient math operations on numbers |
| //! larger than those that fit within the ALU of the system CPU. It is significantly faster |
| //! to perform these operations using the LNME than implementing the same |
| //! functionality in software using regular word-wise math operations. While the |
| //! LNME runs in the background, the system CPU may perform other operations |
| //! or be turned off. |
| //! |
| //! The LNME supports both primitive math operations and serialized primitive |
| //! operations (sequencer operations). |
| //! - Addition |
| //! - Multiplication |
| //! - Comparison |
| //! - Modulo |
| //! - Inverse Modulo |
| //! - ECC Point Addition (including point doubling) |
| //! - ECC Scalar Multiplication |
| //! |
| //! These primitives and sequencer operations can be used to implement various |
| //! public key encryption schemes. |
| //! It is possible to implement the following schemes using the operations mentioned above: |
| //! - RSA encryption and decryption |
| //! - RSA sign and verify |
| //! - DHE (Diffie-Hellman Key Exchange) |
| //! - ECDH (Elliptic Curve Diffie-Hellman Key Exchange) |
| //! - ECDSA (Elliptic Curve Digital Signature Algorithm) |
| //! - ECIES (Elliptic Curve Integrated Encryption Scheme) |
| //! |
| //! The DriverLib PKA functions copy the relevant parameters into the dedicated |
| //! PKA RAM. The LNME requires these parameters be present and correctly |
| //! formatted in the PKA RAM and not system RAM. They are copied word-wise as |
| //! the PKA RAM does not support byte-wise access. The CPU handles the alignment differences |
| //! during the memory copy operation. Forcing buffer alignment in system RAM results |
| //! in a significant speedup of the copy operation compared to unaligned buffers. |
| //! |
| //! When the operation completes, the result is copied back into |
| //! a buffer in system RAM specified by the application. The PKA RAM is then cleared |
| //! to prevent sensitive keying material from remaining in PKA RAM. |
| //! |
| //! |
| //! @} |