diff options
Diffstat (limited to 'crypto/aead.c')
| -rw-r--r-- | crypto/aead.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/crypto/aead.c b/crypto/aead.c index 84a3501fb478..f23c2b0ee009 100644 --- a/crypto/aead.c +++ b/crypto/aead.c @@ -53,6 +53,24 @@ static int setkey(struct crypto_aead *tfm, const u8 *key, unsigned int keylen) return aead->setkey(tfm, key, keylen); } +int crypto_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize) +{ + int err; + + if (authsize > crypto_aead_alg(tfm)->maxauthsize) + return -EINVAL; + + if (crypto_aead_alg(tfm)->setauthsize) { + err = crypto_aead_alg(tfm)->setauthsize(tfm, authsize); + if (err) + return err; + } + + crypto_aead_crt(tfm)->authsize = authsize; + return 0; +} +EXPORT_SYMBOL_GPL(crypto_aead_setauthsize); + static unsigned int crypto_aead_ctxsize(struct crypto_alg *alg, u32 type, u32 mask) { @@ -64,14 +82,14 @@ static int crypto_init_aead_ops(struct crypto_tfm *tfm, u32 type, u32 mask) struct aead_alg *alg = &tfm->__crt_alg->cra_aead; struct aead_tfm *crt = &tfm->crt_aead; - if (max(alg->authsize, alg->ivsize) > PAGE_SIZE / 8) + if (max(alg->maxauthsize, alg->ivsize) > PAGE_SIZE / 8) return -EINVAL; crt->setkey = setkey; crt->encrypt = alg->encrypt; crt->decrypt = alg->decrypt; crt->ivsize = alg->ivsize; - crt->authsize = alg->authsize; + crt->authsize = alg->maxauthsize; return 0; } @@ -85,7 +103,7 @@ static void crypto_aead_show(struct seq_file *m, struct crypto_alg *alg) seq_printf(m, "type : aead\n"); seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); seq_printf(m, "ivsize : %u\n", aead->ivsize); - seq_printf(m, "authsize : %u\n", aead->authsize); + seq_printf(m, "maxauthsize : %u\n", aead->maxauthsize); } const struct crypto_type crypto_aead_type = { |