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The CPACF instruction KMAC provides support for accelerating the HMAC algorithm on newer machines for HMAC with SHA-224, SHA-256, SHA-384, and SHA-512. Preliminary measurements showed performance improvements of up to a factor of 2, dependent on the message size, whether chunking is used and the size of the chunks. Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com> Reviewed-by: Paul Dale <ppzgs1@gmail.com> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/25161)
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/*
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* Copyright 1995-2024 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#ifndef OSSL_CRYPTO_HMAC_LOCAL_H
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# define OSSL_CRYPTO_HMAC_LOCAL_H
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# include "internal/common.h"
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# include "internal/numbers.h"
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# include "openssl/sha.h"
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/* The current largest case is for SHA3-224 */
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#define HMAC_MAX_MD_CBLOCK_SIZE 144
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struct hmac_ctx_st {
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const EVP_MD *md;
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EVP_MD_CTX *md_ctx;
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EVP_MD_CTX *i_ctx;
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EVP_MD_CTX *o_ctx;
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/* Platform specific data */
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union {
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int dummy;
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# ifdef OPENSSL_HMAC_S390X
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struct {
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unsigned int fc; /* 0 if not supported by kmac instruction */
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int blk_size;
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int ikp;
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int iimp;
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unsigned char *buf;
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size_t size; /* must be multiple of digest block size */
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size_t num;
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union {
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OSSL_UNION_ALIGN;
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struct {
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uint32_t h[8];
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uint64_t imbl;
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unsigned char key[64];
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} hmac_224_256;
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struct {
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uint64_t h[8];
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uint128_t imbl;
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unsigned char key[128];
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} hmac_384_512;
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} param;
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} s390x;
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# endif /* OPENSSL_HMAC_S390X */
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} plat;
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};
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# ifdef OPENSSL_HMAC_S390X
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# define HMAC_S390X_BUF_NUM_BLOCKS 64
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int s390x_HMAC_init(HMAC_CTX *ctx, const void *key, int key_len, ENGINE *impl);
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int s390x_HMAC_update(HMAC_CTX *ctx, const unsigned char *data, size_t len);
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int s390x_HMAC_final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len);
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int s390x_HMAC_CTX_copy(HMAC_CTX *dctx, HMAC_CTX *sctx);
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int s390x_HMAC_CTX_cleanup(HMAC_CTX *ctx);
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# endif /* OPENSSL_HMAC_S390X */
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#endif
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