SHA Driver
Linux SHA Driver for Zynq Ultrascale+ MPSoCIntroduction
The SHA-3 IP core is a high-throughput, area-efficient hardware implementation of the SHA-3/Keccak cryptographic hashing functions, compliant to NISTS’s FIPS 180-4 and FIPS 202 standards.
It’s throughput can optionally be optimized by using input message buffering, which allows it to receive new input while still processing the previous message.
Also, the number of hashing rounds per clock is configurable at synthesis time, allowing users to constrain performance to save silicon resources when desired.
HW IP Features
- SHA-3/Keccak cryptographic hashing functions.
Features supported in driver
Table of Contents
- SHA-3/Keccak cryptographic hashing functions.
Kernel Configuration
Devicetree
xlnx_keccak_384: sha384 { compatible = "xlnx,zynqmp-keccak-384"; };
Test Procedure
AF ALG hashing demo exampleCross compile the below example and Need to create the executable file to test the SHA3 functionality.#include <stdio.h>#include <string.h> #include <unistd.h> #include <sys/socket.h> #include <linux/if_alg.h> #include <linux/socket.h> #define SHA384_DIGEST_SZ 48 int main(void) { struct sockaddr_alg sa = { .salg_family = AF_ALG, .salg_type = "hash", .salg_name = "xilinx-keccak-384" }; unsigned char digest[SHA384_DIGEST_SZ]; char *input = "Hellhash"; /* Input Data should be multiple of 4-bytes */ int i, sockfd, fd; sockfd = socket(AF_ALG, SOCK_SEQPACKET, 0); bind(sockfd, (struct sockaddr *)&&sa, sizeof(sa)); fd = accept(sockfd, NULL, 0); write(fd, input, strlen(input)); read(fd, digest, SHA384_DIGEST_SZ); close(fd); close(sockfd); for (i = 0; i < SHA384_DIGEST_SZ; i++) printf("%02x", digest[i]); printf("\n"); return 0; }
Mainline status
- This driver is currently not available in mainline kernel.
Change Log
2017.3Summary
- crypto: zynqmp-sha: Adopted SHA3 support for ZynqMP Soc
- 6aa92ef crypto: zynqmp-sha: Adopted SHA3 support for ZynqMP Soc
2017.4
- None.
2018.1
- Uses NIST SHA-3 Padding