From e853c3cfa8cc24869ecd2526e589bcb176bc12e9 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Tue, 22 Aug 2006 00:06:54 +1000 Subject: [CRYPTO] api: Added crypto_type support This patch adds the crypto_type structure which will be used for all new crypto algorithm types, beginning with block ciphers. The primary purpose of this abstraction is to allow different crypto_type objects for crypto algorithms of the same type, in particular, there will be a different crypto_type objects for asynchronous algorithms. Signed-off-by: Herbert Xu --- crypto/api.c | 32 +++++++++++++++++++++++--------- crypto/proc.c | 5 ++++- 2 files changed, 27 insertions(+), 10 deletions(-) (limited to 'crypto') diff --git a/crypto/api.c b/crypto/api.c index bc4b7901acdf..edaa843d8e83 100644 --- a/crypto/api.c +++ b/crypto/api.c @@ -226,17 +226,18 @@ static int crypto_init_flags(struct crypto_tfm *tfm, u32 flags) case CRYPTO_ALG_TYPE_COMPRESS: return crypto_init_compress_flags(tfm, flags); - - default: - break; } - BUG(); - return -EINVAL; + return 0; } static int crypto_init_ops(struct crypto_tfm *tfm) { + const struct crypto_type *type = tfm->__crt_alg->cra_type; + + if (type) + return type->init(tfm); + switch (crypto_tfm_alg_type(tfm)) { case CRYPTO_ALG_TYPE_CIPHER: return crypto_init_cipher_ops(tfm); @@ -257,6 +258,14 @@ static int crypto_init_ops(struct crypto_tfm *tfm) static void crypto_exit_ops(struct crypto_tfm *tfm) { + const struct crypto_type *type = tfm->__crt_alg->cra_type; + + if (type) { + if (type->exit) + type->exit(tfm); + return; + } + switch (crypto_tfm_alg_type(tfm)) { case CRYPTO_ALG_TYPE_CIPHER: crypto_exit_cipher_ops(tfm); @@ -278,26 +287,31 @@ static void crypto_exit_ops(struct crypto_tfm *tfm) static unsigned int crypto_ctxsize(struct crypto_alg *alg, int flags) { + const struct crypto_type *type = alg->cra_type; unsigned int len; + len = alg->cra_alignmask & ~(crypto_tfm_ctx_alignment() - 1); + if (type) + return len + type->ctxsize(alg); + switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) { default: BUG(); case CRYPTO_ALG_TYPE_CIPHER: - len = crypto_cipher_ctxsize(alg, flags); + len += crypto_cipher_ctxsize(alg, flags); break; case CRYPTO_ALG_TYPE_DIGEST: - len = crypto_digest_ctxsize(alg, flags); + len += crypto_digest_ctxsize(alg, flags); break; case CRYPTO_ALG_TYPE_COMPRESS: - len = crypto_compress_ctxsize(alg, flags); + len += crypto_compress_ctxsize(alg, flags); break; } - return len + (alg->cra_alignmask & ~(crypto_tfm_ctx_alignment() - 1)); + return len; } void crypto_shoot_alg(struct crypto_alg *alg) diff --git a/crypto/proc.c b/crypto/proc.c index 9e573b17e887..dabce0676f63 100644 --- a/crypto/proc.c +++ b/crypto/proc.c @@ -78,7 +78,10 @@ static int c_show(struct seq_file *m, void *p) seq_printf(m, "type : compression\n"); break; default: - seq_printf(m, "type : unknown\n"); + if (alg->cra_type && alg->cra_type->show) + alg->cra_type->show(m, alg); + else + seq_printf(m, "type : unknown\n"); break; } -- cgit v1.2.2