[PATCH -v2 3/5] crypto: cryptd: Add support to access underlaying shash
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STALE6296d
From: Huang Ying <hidden>
Date: 2009-08-03 07:45:42
Also in:
lkml
Subsystem:
crypto api, the rest · Maintainers:
Herbert Xu, "David S. Miller", Linus Torvalds
cryptd_alloc_ahash() will allocate a cryptd-ed ahash for specified
algorithm name. The new allocated one is guaranteed to be cryptd-ed
ahash, so the shash underlying can be gotten via cryptd_ahash_child().
Signed-off-by: Huang Ying <redacted>
---
crypto/cryptd.c | 35 +++++++++++++++++++++++++++++++++++
include/crypto/cryptd.h | 17 +++++++++++++++++
2 files changed, 52 insertions(+), 0 deletions(-)
diff --git a/crypto/cryptd.c b/crypto/cryptd.c
index 2eb7058..3533582 100644
--- a/crypto/cryptd.c
+++ b/crypto/cryptd.c@@ -682,6 +682,41 @@ void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm) } EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher); +struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name, + u32 type, u32 mask) +{ + char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; + struct crypto_ahash *tfm; + + if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, + "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) + return ERR_PTR(-EINVAL); + tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask); + if (IS_ERR(tfm)) + return ERR_CAST(tfm); + if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { + crypto_free_ahash(tfm); + return ERR_PTR(-EINVAL); + } + + return __cryptd_ahash_cast(tfm); +} +EXPORT_SYMBOL_GPL(cryptd_alloc_ahash); + +struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm) +{ + struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); + + return ctx->child; +} +EXPORT_SYMBOL_GPL(cryptd_ahash_child); + +void cryptd_free_ahash(struct cryptd_ahash *tfm) +{ + crypto_free_ahash(&tfm->base); +} +EXPORT_SYMBOL_GPL(cryptd_free_ahash); + static int __init cryptd_init(void) { int err;
diff --git a/include/crypto/cryptd.h b/include/crypto/cryptd.h
index 55fa7bb..2f65a6e 100644
--- a/include/crypto/cryptd.h
+++ b/include/crypto/cryptd.h@@ -7,6 +7,7 @@ #include <linux/crypto.h> #include <linux/kernel.h> +#include <crypto/hash.h> struct cryptd_ablkcipher { struct crypto_ablkcipher base;
@@ -24,4 +25,20 @@ struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name, struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm); void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm); +struct cryptd_ahash { + struct crypto_ahash base; +}; + +static inline struct cryptd_ahash *__cryptd_ahash_cast( + struct crypto_ahash *tfm) +{ + return (struct cryptd_ahash *)tfm; +} + +/* alg_name should be algorithm to be cryptd-ed */ +struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name, + u32 type, u32 mask); +struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm); +void cryptd_free_ahash(struct cryptd_ahash *tfm); + #endif
--
1.6.3.3