poly1305_generic.c (1bdd3e05a0a3b4a97ea88bc46fef8fb265c8b94c) poly1305_generic.c (1c08a104360f3e18f4ee6346c21cc3923efb952e)
1/*
2 * Poly1305 authenticator algorithm, RFC7539
3 *
4 * Copyright (C) 2015 Martin Willi
5 *
6 * Based on public domain code by Andrew Moon and Daniel J. Bernstein.
7 *
8 * This program is free software; you can redistribute it and/or modify

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26 poly1305_core_init(&dctx->h);
27 dctx->buflen = 0;
28 dctx->rset = 0;
29 dctx->sset = false;
30
31 return 0;
32}
33
1/*
2 * Poly1305 authenticator algorithm, RFC7539
3 *
4 * Copyright (C) 2015 Martin Willi
5 *
6 * Based on public domain code by Andrew Moon and Daniel J. Bernstein.
7 *
8 * This program is free software; you can redistribute it and/or modify

--- 17 unchanged lines hidden (view full) ---

26 poly1305_core_init(&dctx->h);
27 dctx->buflen = 0;
28 dctx->rset = 0;
29 dctx->sset = false;
30
31 return 0;
32}
33
34static unsigned int crypto_poly1305_setdesckey(struct poly1305_desc_ctx *dctx,
35 const u8 *src, unsigned int srclen)
36{
37 if (!dctx->sset) {
38 if (!dctx->rset && srclen >= POLY1305_BLOCK_SIZE) {
39 poly1305_core_setkey(&dctx->core_r, src);
40 src += POLY1305_BLOCK_SIZE;
41 srclen -= POLY1305_BLOCK_SIZE;
42 dctx->rset = 2;
43 }
44 if (srclen >= POLY1305_BLOCK_SIZE) {
45 dctx->s[0] = get_unaligned_le32(src + 0);
46 dctx->s[1] = get_unaligned_le32(src + 4);
47 dctx->s[2] = get_unaligned_le32(src + 8);
48 dctx->s[3] = get_unaligned_le32(src + 12);
49 src += POLY1305_BLOCK_SIZE;
50 srclen -= POLY1305_BLOCK_SIZE;
51 dctx->sset = true;
52 }
53 }
54 return srclen;
55}
56
34static void poly1305_blocks(struct poly1305_desc_ctx *dctx, const u8 *src,
35 unsigned int srclen)
36{
37 unsigned int datalen;
38
39 if (unlikely(!dctx->sset)) {
40 datalen = crypto_poly1305_setdesckey(dctx, src, srclen);
41 src += srclen - datalen;
42 srclen = datalen;
43 }
44
57static void poly1305_blocks(struct poly1305_desc_ctx *dctx, const u8 *src,
58 unsigned int srclen)
59{
60 unsigned int datalen;
61
62 if (unlikely(!dctx->sset)) {
63 datalen = crypto_poly1305_setdesckey(dctx, src, srclen);
64 src += srclen - datalen;
65 srclen = datalen;
66 }
67
45 poly1305_core_blocks(&dctx->h, dctx->r, src,
68 poly1305_core_blocks(&dctx->h, &dctx->core_r, src,
46 srclen / POLY1305_BLOCK_SIZE, 1);
47}
48
49static int crypto_poly1305_update(struct shash_desc *desc,
50 const u8 *src, unsigned int srclen)
51{
52 struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc);
53 unsigned int bytes;

--- 73 unchanged lines hidden --- 		69 srclen / POLY1305_BLOCK_SIZE, 1);
70}
71
72static int crypto_poly1305_update(struct shash_desc *desc,
73 const u8 *src, unsigned int srclen)
74{
75 struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc);
76 unsigned int bytes;

--- 73 unchanged lines hidden ---