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| author | Vitaly Chikunov <vt@altlinux.org> | 2019-04-11 18:51:13 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-04-18 17:15:01 +0300 |
| commit | 78a0324f4a5328088fea9426cfe1d1851276c475 (patch) | |
| tree | de5222d19c10023d866d9e59fec731267df9ae2d | |
| parent | 3c2bc636219fc0c2ea82c8f0d3fb0c9936cf5146 (diff) | |
| download | linux-78a0324f4a5328088fea9426cfe1d1851276c475.tar.xz | |
crypto: akcipher - default implementations for request callbacks
Because with the introduction of EC-RDSA and change in workings of RSA
in regard to sign/verify, akcipher could have not all callbacks defined,
check the presence of callbacks in crypto_register_akcipher() and
provide default implementation if the callback is not implemented.
This is suggested by Herbert Xu instead of checking the presence of the
callback on every request.
Signed-off-by: Vitaly Chikunov <vt@altlinux.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | crypto/akcipher.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/crypto/akcipher.c b/crypto/akcipher.c index 0cbeae137e0a..780daa436dac 100644 --- a/crypto/akcipher.c +++ b/crypto/akcipher.c @@ -119,10 +119,24 @@ static void akcipher_prepare_alg(struct akcipher_alg *alg) base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER; } +static int akcipher_default_op(struct akcipher_request *req) +{ + 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; + akcipher_prepare_alg(alg); return crypto_register_alg(base); } |