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crypto: hmac - Add export_core and import_core 

Add export_import and import_core so that hmac can be used as a
fallback by block-only drivers.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2025-05-15 13:54:42 +08:00
parent a05a8bc570
commit 8cf4c341f1
1 changed files with 19 additions and 0 deletions
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19
crypto/hmac.c
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@ -90,6 +90,22 @@ static int hmac_import(struct shash_desc *pdesc, const void *in)
return crypto_shash_import(desc, in); return crypto_shash_import(desc, in);
} }
static int hmac_export_core(struct shash_desc *pdesc, void *out)
{
struct shash_desc *desc = shash_desc_ctx(pdesc);
return crypto_shash_export_core(desc, out);
}
static int hmac_import_core(struct shash_desc *pdesc, const void *in)
{
const struct hmac_ctx *tctx = crypto_shash_ctx(pdesc->tfm);
struct shash_desc *desc = shash_desc_ctx(pdesc);
desc->tfm = tctx->hash;
return crypto_shash_import_core(desc, in);
}
static int hmac_init(struct shash_desc *pdesc) static int hmac_init(struct shash_desc *pdesc)
{ {
const struct hmac_ctx *tctx = crypto_shash_ctx(pdesc->tfm); const struct hmac_ctx *tctx = crypto_shash_ctx(pdesc->tfm);
@ -177,6 +193,7 @@ static int hmac_create(struct crypto_template *tmpl, struct rtattr **tb)
return -ENOMEM; return -ENOMEM;
spawn = shash_instance_ctx(inst); spawn = shash_instance_ctx(inst);
mask |= CRYPTO_AHASH_ALG_NO_EXPORT_CORE;
err = crypto_grab_shash(spawn, shash_crypto_instance(inst), err = crypto_grab_shash(spawn, shash_crypto_instance(inst),
crypto_attr_alg_name(tb[1]), 0, mask); crypto_attr_alg_name(tb[1]), 0, mask);
if (err) if (err)
@ -211,6 +228,8 @@ static int hmac_create(struct crypto_template *tmpl, struct rtattr **tb)
inst->alg.finup = hmac_finup; inst->alg.finup = hmac_finup;
inst->alg.export = hmac_export; inst->alg.export = hmac_export;
inst->alg.import = hmac_import; inst->alg.import = hmac_import;
inst->alg.export_core = hmac_export_core;
inst->alg.import_core = hmac_import_core;
inst->alg.setkey = hmac_setkey; inst->alg.setkey = hmac_setkey;
inst->alg.init_tfm = hmac_init_tfm; inst->alg.init_tfm = hmac_init_tfm;
inst->alg.clone_tfm = hmac_clone_tfm; inst->alg.clone_tfm = hmac_clone_tfm;