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| author | Ard Biesheuvel <ardb@kernel.org> | 2019-11-08 13:22:21 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-11-17 09:02:41 +0800 |
| commit | a5a8b462ec8dc4adcd434465303d0ada17530105 (patch) | |
| tree | 4078a4889ae9d26db385026db755f2239bde0196 | |
| parent | cb47ba99195bd0956dc1421df222c4ceb41f2c5c (diff) | |
| download | linux-crypto-a5a8b462ec8dc4adcd434465303d0ada17530105.tar.gz linux-crypto-a5a8b462ec8dc4adcd434465303d0ada17530105.zip | |
crypto: poly1305 - expose init/update/final library interface
Expose the existing generic Poly1305 code via a init/update/final
library interface so that callers are not required to go through
the crypto API's shash abstraction to access it. At the same time,
make some preparations so that the library implementation can be
superseded by an accelerated arch-specific version in the future.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | crypto/poly1305_generic.c | 22 |
1 files changed, 1 insertions, 21 deletions
diff --git a/crypto/poly1305_generic.c b/crypto/poly1305_generic.c index f3fcd957..afe9a9e5 100644 --- a/crypto/poly1305_generic.c +++ b/crypto/poly1305_generic.c @@ -85,31 +85,11 @@ EXPORT_SYMBOL_GPL(crypto_poly1305_update); int crypto_poly1305_final(struct shash_desc *desc, u8 *dst) { struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc); - __le32 digest[4]; - u64 f = 0; if (unlikely(!dctx->sset)) return -ENOKEY; - if (unlikely(dctx->buflen)) { - dctx->buf[dctx->buflen++] = 1; - memset(dctx->buf + dctx->buflen, 0, - POLY1305_BLOCK_SIZE - dctx->buflen); - poly1305_core_blocks(&dctx->h, dctx->r, dctx->buf, 1, 0); - } - - poly1305_core_emit(&dctx->h, digest); - - /* mac = (h + s) % (2^128) */ - f = (f >> 32) + le32_to_cpu(digest[0]) + dctx->s[0]; - put_unaligned_le32(f, dst + 0); - f = (f >> 32) + le32_to_cpu(digest[1]) + dctx->s[1]; - put_unaligned_le32(f, dst + 4); - f = (f >> 32) + le32_to_cpu(digest[2]) + dctx->s[2]; - put_unaligned_le32(f, dst + 8); - f = (f >> 32) + le32_to_cpu(digest[3]) + dctx->s[3]; - put_unaligned_le32(f, dst + 12); - + poly1305_final_generic(dctx, dst); return 0; } EXPORT_SYMBOL_GPL(crypto_poly1305_final); |