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crypto: pkcs1pad - comply with crypto_akcipher_maxsize() 

crypto_akcipher_maxsize() asks for the output buffer size without
caring for errors. It allways assume that will be called after
a valid setkey. Comply with it and return what he wants.

crypto_akcipher_maxsize() now returns an unsigned int.
Remove the unnecessary check.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
hifive-unleashed-5.1
Tudor-Dan Ambarus 2017-05-25 10:18:16 +03:00 committed by Herbert Xu
parent 515c4d27d6
commit 543de102e3
1 changed files with 2 additions and 8 deletions
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10
crypto/rsa-pkcs1pad.c
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@ -120,9 +120,6 @@ static int pkcs1pad_set_pub_key(struct crypto_akcipher *tfm, const void *key,
/* Find out new modulus size from rsa implementation */
err = crypto_akcipher_maxsize(ctx->child);
if (err < 0)
return err;
if (err > PAGE_SIZE)
return -ENOTSUPP;
@ -144,9 +141,6 @@ static int pkcs1pad_set_priv_key(struct crypto_akcipher *tfm, const void *key,
/* Find out new modulus size from rsa implementation */
err = crypto_akcipher_maxsize(ctx->child);
if (err < 0)
return err;
if (err > PAGE_SIZE)
return -ENOTSUPP;
@ -154,7 +148,7 @@ static int pkcs1pad_set_priv_key(struct crypto_akcipher *tfm, const void *key,
return 0;
}
static int pkcs1pad_get_max_size(struct crypto_akcipher *tfm)
static unsigned int pkcs1pad_get_max_size(struct crypto_akcipher *tfm)
{
struct pkcs1pad_ctx *ctx = akcipher_tfm_ctx(tfm);
@ -164,7 +158,7 @@ static int pkcs1pad_get_max_size(struct crypto_akcipher *tfm)
* decrypt/verify.
*/
return ctx->key_size ?: -EINVAL;
return ctx->key_size;
}
static void pkcs1pad_sg_set_buf(struct scatterlist *sg, void *buf, size_t len,