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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /crypto/akcipher.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'crypto/akcipher.c')
-rw-r--r--crypto/akcipher.c312
1 files changed, 312 insertions, 0 deletions
diff --git a/crypto/akcipher.c b/crypto/akcipher.c
new file mode 100644
index 0000000000..52813f0b19
--- /dev/null
+++ b/crypto/akcipher.c
@@ -0,0 +1,312 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Public Key Encryption
+ *
+ * Copyright (c) 2015, Intel Corporation
+ * Authors: Tadeusz Struk <tadeusz.struk@intel.com>
+ */
+#include <crypto/internal/akcipher.h>
+#include <linux/cryptouser.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/scatterlist.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <net/netlink.h>
+
+#include "internal.h"
+
+#define CRYPTO_ALG_TYPE_AHASH_MASK 0x0000000e
+
+static int __maybe_unused crypto_akcipher_report(
+ struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct crypto_report_akcipher rakcipher;
+
+ memset(&rakcipher, 0, sizeof(rakcipher));
+
+ strscpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
+
+ return nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
+ sizeof(rakcipher), &rakcipher);
+}
+
+static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
+ __maybe_unused;
+
+static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
+{
+ seq_puts(m, "type : akcipher\n");
+}
+
+static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm)
+{
+ struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
+ struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
+
+ alg->exit(akcipher);
+}
+
+static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
+{
+ struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
+ struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
+
+ if (alg->exit)
+ akcipher->base.exit = crypto_akcipher_exit_tfm;
+
+ if (alg->init)
+ return alg->init(akcipher);
+
+ return 0;
+}
+
+static void crypto_akcipher_free_instance(struct crypto_instance *inst)
+{
+ struct akcipher_instance *akcipher = akcipher_instance(inst);
+
+ akcipher->free(akcipher);
+}
+
+static int __maybe_unused crypto_akcipher_report_stat(
+ struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct akcipher_alg *akcipher = __crypto_akcipher_alg(alg);
+ struct crypto_istat_akcipher *istat;
+ struct crypto_stat_akcipher rakcipher;
+
+ istat = akcipher_get_stat(akcipher);
+
+ memset(&rakcipher, 0, sizeof(rakcipher));
+
+ strscpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
+ rakcipher.stat_encrypt_cnt = atomic64_read(&istat->encrypt_cnt);
+ rakcipher.stat_encrypt_tlen = atomic64_read(&istat->encrypt_tlen);
+ rakcipher.stat_decrypt_cnt = atomic64_read(&istat->decrypt_cnt);
+ rakcipher.stat_decrypt_tlen = atomic64_read(&istat->decrypt_tlen);
+ rakcipher.stat_sign_cnt = atomic64_read(&istat->sign_cnt);
+ rakcipher.stat_verify_cnt = atomic64_read(&istat->verify_cnt);
+ rakcipher.stat_err_cnt = atomic64_read(&istat->err_cnt);
+
+ return nla_put(skb, CRYPTOCFGA_STAT_AKCIPHER,
+ sizeof(rakcipher), &rakcipher);
+}
+
+static const struct crypto_type crypto_akcipher_type = {
+ .extsize = crypto_alg_extsize,
+ .init_tfm = crypto_akcipher_init_tfm,
+ .free = crypto_akcipher_free_instance,
+#ifdef CONFIG_PROC_FS
+ .show = crypto_akcipher_show,
+#endif
+#if IS_ENABLED(CONFIG_CRYPTO_USER)
+ .report = crypto_akcipher_report,
+#endif
+#ifdef CONFIG_CRYPTO_STATS
+ .report_stat = crypto_akcipher_report_stat,
+#endif
+ .maskclear = ~CRYPTO_ALG_TYPE_MASK,
+ .maskset = CRYPTO_ALG_TYPE_AHASH_MASK,
+ .type = CRYPTO_ALG_TYPE_AKCIPHER,
+ .tfmsize = offsetof(struct crypto_akcipher, base),
+};
+
+int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn,
+ struct crypto_instance *inst,
+ const char *name, u32 type, u32 mask)
+{
+ spawn->base.frontend = &crypto_akcipher_type;
+ return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_grab_akcipher);
+
+struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
+ u32 mask)
+{
+ return crypto_alloc_tfm(alg_name, &crypto_akcipher_type, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
+
+static void akcipher_prepare_alg(struct akcipher_alg *alg)
+{
+ struct crypto_istat_akcipher *istat = akcipher_get_stat(alg);
+ struct crypto_alg *base = &alg->base;
+
+ base->cra_type = &crypto_akcipher_type;
+ base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
+ base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER;
+
+ if (IS_ENABLED(CONFIG_CRYPTO_STATS))
+ memset(istat, 0, sizeof(*istat));
+}
+
+static int akcipher_default_op(struct akcipher_request *req)
+{
+ return -ENOSYS;
+}
+
+static int akcipher_default_set_key(struct crypto_akcipher *tfm,
+ const void *key, unsigned int keylen)
+{
+ return -ENOSYS;
+}
+
+int crypto_register_akcipher(struct akcipher_alg *alg)
+{
+ struct crypto_alg *base = &alg->base;
+
+ if (!alg->sign)
+ alg->sign = akcipher_default_op;
+ if (!alg->verify)
+ alg->verify = akcipher_default_op;
+ if (!alg->encrypt)
+ alg->encrypt = akcipher_default_op;
+ if (!alg->decrypt)
+ alg->decrypt = akcipher_default_op;
+ if (!alg->set_priv_key)
+ alg->set_priv_key = akcipher_default_set_key;
+
+ akcipher_prepare_alg(alg);
+ return crypto_register_alg(base);
+}
+EXPORT_SYMBOL_GPL(crypto_register_akcipher);
+
+void crypto_unregister_akcipher(struct akcipher_alg *alg)
+{
+ crypto_unregister_alg(&alg->base);
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
+
+int akcipher_register_instance(struct crypto_template *tmpl,
+ struct akcipher_instance *inst)
+{
+ if (WARN_ON(!inst->free))
+ return -EINVAL;
+ akcipher_prepare_alg(&inst->alg);
+ return crypto_register_instance(tmpl, akcipher_crypto_instance(inst));
+}
+EXPORT_SYMBOL_GPL(akcipher_register_instance);
+
+int crypto_akcipher_sync_prep(struct crypto_akcipher_sync_data *data)
+{
+ unsigned int reqsize = crypto_akcipher_reqsize(data->tfm);
+ struct akcipher_request *req;
+ struct scatterlist *sg;
+ unsigned int mlen;
+ unsigned int len;
+ u8 *buf;
+
+ if (data->dst)
+ mlen = max(data->slen, data->dlen);
+ else
+ mlen = data->slen + data->dlen;
+
+ len = sizeof(*req) + reqsize + mlen;
+ if (len < mlen)
+ return -EOVERFLOW;
+
+ req = kzalloc(len, GFP_KERNEL);
+ if (!req)
+ return -ENOMEM;
+
+ data->req = req;
+ akcipher_request_set_tfm(req, data->tfm);
+
+ buf = (u8 *)(req + 1) + reqsize;
+ data->buf = buf;
+ memcpy(buf, data->src, data->slen);
+
+ sg = &data->sg;
+ sg_init_one(sg, buf, mlen);
+ akcipher_request_set_crypt(req, sg, data->dst ? sg : NULL,
+ data->slen, data->dlen);
+
+ crypto_init_wait(&data->cwait);
+ akcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP,
+ crypto_req_done, &data->cwait);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_akcipher_sync_prep);
+
+int crypto_akcipher_sync_post(struct crypto_akcipher_sync_data *data, int err)
+{
+ err = crypto_wait_req(err, &data->cwait);
+ if (data->dst)
+ memcpy(data->dst, data->buf, data->dlen);
+ data->dlen = data->req->dst_len;
+ kfree_sensitive(data->req);
+ return err;
+}
+EXPORT_SYMBOL_GPL(crypto_akcipher_sync_post);
+
+int crypto_akcipher_sync_encrypt(struct crypto_akcipher *tfm,
+ const void *src, unsigned int slen,
+ void *dst, unsigned int dlen)
+{
+ struct crypto_akcipher_sync_data data = {
+ .tfm = tfm,
+ .src = src,
+ .dst = dst,
+ .slen = slen,
+ .dlen = dlen,
+ };
+
+ return crypto_akcipher_sync_prep(&data) ?:
+ crypto_akcipher_sync_post(&data,
+ crypto_akcipher_encrypt(data.req));
+}
+EXPORT_SYMBOL_GPL(crypto_akcipher_sync_encrypt);
+
+int crypto_akcipher_sync_decrypt(struct crypto_akcipher *tfm,
+ const void *src, unsigned int slen,
+ void *dst, unsigned int dlen)
+{
+ struct crypto_akcipher_sync_data data = {
+ .tfm = tfm,
+ .src = src,
+ .dst = dst,
+ .slen = slen,
+ .dlen = dlen,
+ };
+
+ return crypto_akcipher_sync_prep(&data) ?:
+ crypto_akcipher_sync_post(&data,
+ crypto_akcipher_decrypt(data.req)) ?:
+ data.dlen;
+}
+EXPORT_SYMBOL_GPL(crypto_akcipher_sync_decrypt);
+
+static void crypto_exit_akcipher_ops_sig(struct crypto_tfm *tfm)
+{
+ struct crypto_akcipher **ctx = crypto_tfm_ctx(tfm);
+
+ crypto_free_akcipher(*ctx);
+}
+
+int crypto_init_akcipher_ops_sig(struct crypto_tfm *tfm)
+{
+ struct crypto_akcipher **ctx = crypto_tfm_ctx(tfm);
+ struct crypto_alg *calg = tfm->__crt_alg;
+ struct crypto_akcipher *akcipher;
+
+ if (!crypto_mod_get(calg))
+ return -EAGAIN;
+
+ akcipher = crypto_create_tfm(calg, &crypto_akcipher_type);
+ if (IS_ERR(akcipher)) {
+ crypto_mod_put(calg);
+ return PTR_ERR(akcipher);
+ }
+
+ *ctx = akcipher;
+ tfm->exit = crypto_exit_akcipher_ops_sig;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_init_akcipher_ops_sig);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Generic public key cipher type");