// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Crypto API support for SHA-384, SHA-512, HMAC-SHA384, and HMAC-SHA512
*
* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
* Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
* Copyright 2025 Google LLC
*/
#include <crypto/internal/hash.h>
#include <crypto/sha2.h>
#include <linux/kernel.h>
#include <linux/module.h>
/*
* Export and import functions. crypto_shash wants a particular format that
* matches that used by some legacy drivers. It currently is the same as the
* library SHA context, except the value in bytecount_lo must be block-aligned
* and the remainder must be stored in an extra u8 appended to the struct.
*/
#define SHA512_SHASH_STATE_SIZE 209
static_assert(offsetof(struct __sha512_ctx, state) == 0 );
static_assert(offsetof(struct __sha512_ctx, bytecount_lo) == 64 );
static_assert(offsetof(struct __sha512_ctx, bytecount_hi) == 72 );
static_assert(offsetof(struct __sha512_ctx, buf) == 80 );
static_assert(sizeof (struct __sha512_ctx) + 1 == SHA512_SHASH_STATE_SIZE);
static int __crypto_sha512_export(const struct __sha512_ctx *ctx0, void *out)
{
struct __sha512_ctx ctx = *ctx0;
unsigned int partial;
u8 *p = out;
partial = ctx.bytecount_lo % SHA512_BLOCK_SIZE;
ctx.bytecount_lo -= partial;
memcpy(p, &ctx, sizeof (ctx));
p += sizeof (ctx);
*p = partial;
return 0 ;
}
static int __crypto_sha512_import(struct __sha512_ctx *ctx, const void *in)
{
const u8 *p = in;
memcpy(ctx, p, sizeof (*ctx));
p += sizeof (*ctx);
ctx->bytecount_lo += *p;
return 0 ;
}
static int __crypto_sha512_export_core(const struct __sha512_ctx *ctx,
void *out)
{
memcpy(out, ctx, offsetof(struct __sha512_ctx, buf));
return 0 ;
}
static int __crypto_sha512_import_core(struct __sha512_ctx *ctx, const void *in)
{
memcpy(ctx, in, offsetof(struct __sha512_ctx, buf));
return 0 ;
}
/* SHA-384 */
const u8 sha384_zero_message_hash[SHA384_DIGEST_SIZE] = {
0 x38, 0 xb0, 0 x60, 0 xa7, 0 x51, 0 xac, 0 x96, 0 x38,
0 x4c, 0 xd9, 0 x32, 0 x7e, 0 xb1, 0 xb1, 0 xe3, 0 x6a,
0 x21, 0 xfd, 0 xb7, 0 x11, 0 x14, 0 xbe, 0 x07, 0 x43,
0 x4c, 0 x0c, 0 xc7, 0 xbf, 0 x63, 0 xf6, 0 xe1, 0 xda,
0 x27, 0 x4e, 0 xde, 0 xbf, 0 xe7, 0 x6f, 0 x65, 0 xfb,
0 xd5, 0 x1a, 0 xd2, 0 xf1, 0 x48, 0 x98, 0 xb9, 0 x5b
};
EXPORT_SYMBOL_GPL(sha384_zero_message_hash);
#define SHA384_CTX(desc) ((struct sha384_ctx *)shash_desc_ctx(desc))
static int crypto_sha384_init(struct shash_desc *desc)
{
sha384_init(SHA384_CTX(desc));
return 0 ;
}
static int crypto_sha384_update(struct shash_desc *desc,
const u8 *data, unsigned int len)
{
sha384_update(SHA384_CTX(desc), data, len);
return 0 ;
}
static int crypto_sha384_final(struct shash_desc *desc, u8 *out)
{
sha384_final(SHA384_CTX(desc), out);
return 0 ;
}
static int crypto_sha384_digest(struct shash_desc *desc,
const u8 *data, unsigned int len, u8 *out)
{
sha384(data, len, out);
return 0 ;
}
static int crypto_sha384_export(struct shash_desc *desc, void *out)
{
return __crypto_sha512_export(&SHA384_CTX(desc)->ctx, out);
}
static int crypto_sha384_import(struct shash_desc *desc, const void *in)
{
return __crypto_sha512_import(&SHA384_CTX(desc)->ctx, in);
}
static int crypto_sha384_export_core(struct shash_desc *desc, void *out)
{
return __crypto_sha512_export_core(&SHA384_CTX(desc)->ctx, out);
}
static int crypto_sha384_import_core(struct shash_desc *desc, const void *in)
{
return __crypto_sha512_import_core(&SHA384_CTX(desc)->ctx, in);
}
/* SHA-512 */
const u8 sha512_zero_message_hash[SHA512_DIGEST_SIZE] = {
0 xcf, 0 x83, 0 xe1, 0 x35, 0 x7e, 0 xef, 0 xb8, 0 xbd,
0 xf1, 0 x54, 0 x28, 0 x50, 0 xd6, 0 x6d, 0 x80, 0 x07,
0 xd6, 0 x20, 0 xe4, 0 x05, 0 x0b, 0 x57, 0 x15, 0 xdc,
0 x83, 0 xf4, 0 xa9, 0 x21, 0 xd3, 0 x6c, 0 xe9, 0 xce,
0 x47, 0 xd0, 0 xd1, 0 x3c, 0 x5d, 0 x85, 0 xf2, 0 xb0,
0 xff, 0 x83, 0 x18, 0 xd2, 0 x87, 0 x7e, 0 xec, 0 x2f,
0 x63, 0 xb9, 0 x31, 0 xbd, 0 x47, 0 x41, 0 x7a, 0 x81,
0 xa5, 0 x38, 0 x32, 0 x7a, 0 xf9, 0 x27, 0 xda, 0 x3e
};
EXPORT_SYMBOL_GPL(sha512_zero_message_hash);
#define SHA512_CTX(desc) ((struct sha512_ctx *)shash_desc_ctx(desc))
static int crypto_sha512_init(struct shash_desc *desc)
{
sha512_init(SHA512_CTX(desc));
return 0 ;
}
static int crypto_sha512_update(struct shash_desc *desc,
const u8 *data, unsigned int len)
{
sha512_update(SHA512_CTX(desc), data, len);
return 0 ;
}
static int crypto_sha512_final(struct shash_desc *desc, u8 *out)
{
sha512_final(SHA512_CTX(desc), out);
return 0 ;
}
static int crypto_sha512_digest(struct shash_desc *desc,
const u8 *data, unsigned int len, u8 *out)
{
sha512(data, len, out);
return 0 ;
}
static int crypto_sha512_export(struct shash_desc *desc, void *out)
{
return __crypto_sha512_export(&SHA512_CTX(desc)->ctx, out);
}
static int crypto_sha512_import(struct shash_desc *desc, const void *in)
{
return __crypto_sha512_import(&SHA512_CTX(desc)->ctx, in);
}
static int crypto_sha512_export_core(struct shash_desc *desc, void *out)
{
return __crypto_sha512_export_core(&SHA512_CTX(desc)->ctx, out);
}
static int crypto_sha512_import_core(struct shash_desc *desc, const void *in)
{
return __crypto_sha512_import_core(&SHA512_CTX(desc)->ctx, in);
}
/* HMAC-SHA384 */
#define HMAC_SHA384_KEY(tfm) ((struct hmac_sha384_key *)crypto_shash_ctx(tfm))
#define HMAC_SHA384_CTX(desc) ((struct hmac_sha384_ctx *)shash_desc_ctx(desc))
static int crypto_hmac_sha384_setkey(struct crypto_shash *tfm,
const u8 *raw_key, unsigned int keylen)
{
hmac_sha384_preparekey(HMAC_SHA384_KEY(tfm), raw_key, keylen);
return 0 ;
}
static int crypto_hmac_sha384_init(struct shash_desc *desc)
{
hmac_sha384_init(HMAC_SHA384_CTX(desc), HMAC_SHA384_KEY(desc->tfm));
return 0 ;
}
static int crypto_hmac_sha384_update(struct shash_desc *desc,
const u8 *data, unsigned int len)
{
hmac_sha384_update(HMAC_SHA384_CTX(desc), data, len);
return 0 ;
}
static int crypto_hmac_sha384_final(struct shash_desc *desc, u8 *out)
{
hmac_sha384_final(HMAC_SHA384_CTX(desc), out);
return 0 ;
}
static int crypto_hmac_sha384_digest(struct shash_desc *desc,
const u8 *data, unsigned int len,
u8 *out)
{
hmac_sha384(HMAC_SHA384_KEY(desc->tfm), data, len, out);
return 0 ;
}
static int crypto_hmac_sha384_export(struct shash_desc *desc, void *out)
{
return __crypto_sha512_export(&HMAC_SHA384_CTX(desc)->ctx.sha_ctx, out);
}
static int crypto_hmac_sha384_import(struct shash_desc *desc, const void *in)
{
struct hmac_sha384_ctx *ctx = HMAC_SHA384_CTX(desc);
ctx->ctx.ostate = HMAC_SHA384_KEY(desc->tfm)->key.ostate;
return __crypto_sha512_import(&ctx->ctx.sha_ctx, in);
}
static int crypto_hmac_sha384_export_core(struct shash_desc *desc, void *out)
{
return __crypto_sha512_export_core(&HMAC_SHA384_CTX(desc)->ctx.sha_ctx,
out);
}
static int crypto_hmac_sha384_import_core(struct shash_desc *desc,
const void *in)
{
struct hmac_sha384_ctx *ctx = HMAC_SHA384_CTX(desc);
ctx->ctx.ostate = HMAC_SHA384_KEY(desc->tfm)->key.ostate;
return __crypto_sha512_import_core(&ctx->ctx.sha_ctx, in);
}
/* HMAC-SHA512 */
#define HMAC_SHA512_KEY(tfm) ((struct hmac_sha512_key *)crypto_shash_ctx(tfm))
#define HMAC_SHA512_CTX(desc) ((struct hmac_sha512_ctx *)shash_desc_ctx(desc))
static int crypto_hmac_sha512_setkey(struct crypto_shash *tfm,
const u8 *raw_key, unsigned int keylen)
{
hmac_sha512_preparekey(HMAC_SHA512_KEY(tfm), raw_key, keylen);
return 0 ;
}
static int crypto_hmac_sha512_init(struct shash_desc *desc)
{
hmac_sha512_init(HMAC_SHA512_CTX(desc), HMAC_SHA512_KEY(desc->tfm));
return 0 ;
}
static int crypto_hmac_sha512_update(struct shash_desc *desc,
const u8 *data, unsigned int len)
{
hmac_sha512_update(HMAC_SHA512_CTX(desc), data, len);
return 0 ;
}
static int crypto_hmac_sha512_final(struct shash_desc *desc, u8 *out)
{
hmac_sha512_final(HMAC_SHA512_CTX(desc), out);
return 0 ;
}
static int crypto_hmac_sha512_digest(struct shash_desc *desc,
const u8 *data, unsigned int len,
u8 *out)
{
hmac_sha512(HMAC_SHA512_KEY(desc->tfm), data, len, out);
return 0 ;
}
static int crypto_hmac_sha512_export(struct shash_desc *desc, void *out)
{
return __crypto_sha512_export(&HMAC_SHA512_CTX(desc)->ctx.sha_ctx, out);
}
static int crypto_hmac_sha512_import(struct shash_desc *desc, const void *in)
{
struct hmac_sha512_ctx *ctx = HMAC_SHA512_CTX(desc);
ctx->ctx.ostate = HMAC_SHA512_KEY(desc->tfm)->key.ostate;
return __crypto_sha512_import(&ctx->ctx.sha_ctx, in);
}
static int crypto_hmac_sha512_export_core(struct shash_desc *desc, void *out)
{
return __crypto_sha512_export_core(&HMAC_SHA512_CTX(desc)->ctx.sha_ctx,
out);
}
static int crypto_hmac_sha512_import_core(struct shash_desc *desc,
const void *in)
{
struct hmac_sha512_ctx *ctx = HMAC_SHA512_CTX(desc);
ctx->ctx.ostate = HMAC_SHA512_KEY(desc->tfm)->key.ostate;
return __crypto_sha512_import_core(&ctx->ctx.sha_ctx, in);
}
/* Algorithm definitions */
static struct shash_alg algs[] = {
{
.base.cra_name = "sha384" ,
.base.cra_driver_name = "sha384-lib" ,
.base.cra_priority = 300 ,
.base.cra_blocksize = SHA384_BLOCK_SIZE,
.base.cra_module = THIS_MODULE,
.digestsize = SHA384_DIGEST_SIZE,
.init = crypto_sha384_init,
.update = crypto_sha384_update,
.final = crypto_sha384_final,
.digest = crypto_sha384_digest,
.export = crypto_sha384_export,
.import = crypto_sha384_import,
.export_core = crypto_sha384_export_core,
.import_core = crypto_sha384_import_core,
.descsize = sizeof (struct sha384_ctx),
.statesize = SHA512_SHASH_STATE_SIZE,
},
{
.base.cra_name = "sha512" ,
.base.cra_driver_name = "sha512-lib" ,
.base.cra_priority = 300 ,
.base.cra_blocksize = SHA512_BLOCK_SIZE,
.base.cra_module = THIS_MODULE,
.digestsize = SHA512_DIGEST_SIZE,
.init = crypto_sha512_init,
.update = crypto_sha512_update,
.final = crypto_sha512_final,
.digest = crypto_sha512_digest,
.export = crypto_sha512_export,
.import = crypto_sha512_import,
.export_core = crypto_sha512_export_core,
.import_core = crypto_sha512_import_core,
.descsize = sizeof (struct sha512_ctx),
.statesize = SHA512_SHASH_STATE_SIZE,
},
{
.base.cra_name = "hmac(sha384)" ,
.base.cra_driver_name = "hmac-sha384-lib" ,
.base.cra_priority = 300 ,
.base.cra_blocksize = SHA384_BLOCK_SIZE,
.base.cra_ctxsize = sizeof (struct hmac_sha384_key),
.base.cra_module = THIS_MODULE,
.digestsize = SHA384_DIGEST_SIZE,
.setkey = crypto_hmac_sha384_setkey,
.init = crypto_hmac_sha384_init,
.update = crypto_hmac_sha384_update,
.final = crypto_hmac_sha384_final,
.digest = crypto_hmac_sha384_digest,
.export = crypto_hmac_sha384_export,
.import = crypto_hmac_sha384_import,
.export_core = crypto_hmac_sha384_export_core,
.import_core = crypto_hmac_sha384_import_core,
.descsize = sizeof (struct hmac_sha384_ctx),
.statesize = SHA512_SHASH_STATE_SIZE,
},
{
.base.cra_name = "hmac(sha512)" ,
.base.cra_driver_name = "hmac-sha512-lib" ,
.base.cra_priority = 300 ,
.base.cra_blocksize = SHA512_BLOCK_SIZE,
.base.cra_ctxsize = sizeof (struct hmac_sha512_key),
.base.cra_module = THIS_MODULE,
.digestsize = SHA512_DIGEST_SIZE,
.setkey = crypto_hmac_sha512_setkey,
.init = crypto_hmac_sha512_init,
.update = crypto_hmac_sha512_update,
.final = crypto_hmac_sha512_final,
.digest = crypto_hmac_sha512_digest,
.export = crypto_hmac_sha512_export,
.import = crypto_hmac_sha512_import,
.export_core = crypto_hmac_sha512_export_core,
.import_core = crypto_hmac_sha512_import_core,
.descsize = sizeof (struct hmac_sha512_ctx),
.statesize = SHA512_SHASH_STATE_SIZE,
},
};
static int __init crypto_sha512_mod_init(void )
{
return crypto_register_shashes(algs, ARRAY_SIZE(algs));
}
module_init(crypto_sha512_mod_init);
static void __exit crypto_sha512_mod_exit(void )
{
crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
}
module_exit(crypto_sha512_mod_exit);
MODULE_LICENSE("GPL" );
MODULE_DESCRIPTION("Crypto API support for SHA-384, SHA-512, HMAC-SHA384, and HMAC-SHA512" );
MODULE_ALIAS_CRYPTO("sha384" );
MODULE_ALIAS_CRYPTO("sha384-lib" );
MODULE_ALIAS_CRYPTO("sha512" );
MODULE_ALIAS_CRYPTO("sha512-lib" );
MODULE_ALIAS_CRYPTO("hmac(sha384)" );
MODULE_ALIAS_CRYPTO("hmac-sha384-lib" );
MODULE_ALIAS_CRYPTO("hmac(sha512)" );
MODULE_ALIAS_CRYPTO("hmac-sha512-lib" );
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