13.3.3.3 GCM API

The GCM function entry point is is located at the Boot ROM address 0x0200190C and the function parameters are:

• Block1[in]: a pointer to 128-bit data blocks that are to be multiplied
• Block2[in]: a pointer to 128-bit data blocks that are to be multiplied
• dst[out]: a pointer to a location for storing the result

The API is:

/* Type definition for GF(2^128) multiplication */
typedef void (*crya_gf_mult128_t) (const uint32_t *block1, const uint32_t *block2, uint32_t *dst);

/* GF(2^128) multiplication.
*
* \param block1[In]: A pointer to 128-bit data blocks that are to be multiplied
* \param block2[In]: A pointer to 128-bit data blocks that are to be multiplied
* \param dst[out]: A pointer to a location for storing the result
*/
#define secure_crya_gf_mult128 ((crya_gf_mult128_t ) (0x0200190C | 0x1))