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author | Tadeusz Struk <tadeusz.struk@intel.com> | 2015-06-16 10:30:55 -0700 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-06-17 17:03:14 +0800 |
commit | 3c339ab83fc09d9d91fb7e8b4a60e8ddc91de417 (patch) | |
tree | b9e262f57e0acad14b05b0545dfd5c690f78f356 /crypto/akcipher.c | |
parent | c2b7b20aedfa10de3634877c3e4b7bc9a7d6461e (diff) | |
download | linux-3c339ab83fc09d9d91fb7e8b4a60e8ddc91de417.tar.bz2 |
crypto: akcipher - add PKE API
Add Public Key Encryption API.
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Made CRYPTO_AKCIPHER invisible like other type config options.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/akcipher.c')
-rw-r--r-- | crypto/akcipher.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/crypto/akcipher.c b/crypto/akcipher.c new file mode 100644 index 000000000000..d7986414814e --- /dev/null +++ b/crypto/akcipher.c @@ -0,0 +1,117 @@ +/* + * Public Key Encryption + * + * Copyright (c) 2015, Intel Corporation + * Authors: Tadeusz Struk <tadeusz.struk@intel.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + */ +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/seq_file.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/crypto.h> +#include <crypto/algapi.h> +#include <linux/cryptouser.h> +#include <net/netlink.h> +#include <crypto/akcipher.h> +#include <crypto/public_key.h> +#include "internal.h" + +#ifdef CONFIG_NET +static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg) +{ + struct crypto_report_akcipher rakcipher; + + strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type)); + + if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER, + sizeof(struct crypto_report_akcipher), &rakcipher)) + goto nla_put_failure; + return 0; + +nla_put_failure: + return -EMSGSIZE; +} +#else +static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg) +{ + return -ENOSYS; +} +#endif + +static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg) + __attribute__ ((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 const struct crypto_type crypto_akcipher_type = { + .extsize = crypto_alg_extsize, + .init_tfm = crypto_akcipher_init_tfm, +#ifdef CONFIG_PROC_FS + .show = crypto_akcipher_show, +#endif + .report = crypto_akcipher_report, + .maskclear = ~CRYPTO_ALG_TYPE_MASK, + .maskset = CRYPTO_ALG_TYPE_MASK, + .type = CRYPTO_ALG_TYPE_AKCIPHER, + .tfmsize = offsetof(struct crypto_akcipher, base), +}; + +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); + +int crypto_register_akcipher(struct akcipher_alg *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; + 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); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Generic public key cihper type"); |