diff options
| author | Tudor Ambarus <tudor.ambarus@microchip.com> | 2021-07-20 11:55:32 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-07-30 10:58:33 +0800 |
| commit | 031f5e00150895232e658f67e66382b6c867ba13 (patch) | |
| tree | c9ac4bffd95c4ef20c9704be04df85fe537a3d25 /drivers/crypto/atmel-tdes.c | |
| parent | 0d0433599d84bf7db8caa8fb76915dc0ff818150 (diff) | |
crypto: atmel-tdes - Add FIPS81's zero length cryptlen constraint
FIPS81 requires for the ECB, CBC, CFB, and OFB modes that the
plaintext and ciphertext to have a positive integer length.
Add this constraint and just return 0 for a zero length cryptlen.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/atmel-tdes.c')
| -rw-r--r-- | drivers/crypto/atmel-tdes.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/crypto/atmel-tdes.c b/drivers/crypto/atmel-tdes.c index abbf1b7a75ab..8380e0ab149a 100644 --- a/drivers/crypto/atmel-tdes.c +++ b/drivers/crypto/atmel-tdes.c @@ -682,6 +682,9 @@ static int atmel_tdes_crypt(struct skcipher_request *req, unsigned long mode) struct atmel_tdes_reqctx *rctx = skcipher_request_ctx(req); struct device *dev = ctx->dd->dev; + if (!req->cryptlen) + return 0; + switch (mode & TDES_FLAGS_OPMODE_MASK) { case TDES_FLAGS_CFB8: if (!IS_ALIGNED(req->cryptlen, CFB8_BLOCK_SIZE)) { |