Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:include\crypto\internal\poly1305.h Create Date:2022-07-28 06:47:29
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:Poly1305 requires a unique key for each tag, which implies that we can't set* it on the tfm that gets accessed by multiple users simultaneously. Instead we* expect the key as the first 32 bytes in the update() call.

Proto:static inline unsigned int crypto_poly1305_setdesckey(struct poly1305_desc_ctx *dctx, const u8 *src, unsigned int srclen)

Type:unsigned int

Parameter:

TypeParameterName
struct poly1305_desc_ctx *dctx
const u8 *src
unsigned intsrclen
38  If Not whether s[] has been set Then
39  If Not how many keys have been set in r[] && srclen >= POLY1305_BLOCK_SIZE Then
40  poly1305_core_setkey( key , src)
41  src += POLY1305_BLOCK_SIZE
42  srclen -= POLY1305_BLOCK_SIZE
43  how many keys have been set in r[] = 1
45  If srclen >= POLY1305_BLOCK_SIZE Then
46  finalize key [0] = get_unaligned_le32(src + 0)
47  finalize key [1] = get_unaligned_le32(src + 4)
48  finalize key [2] = get_unaligned_le32(src + 8)
49  finalize key [3] = get_unaligned_le32(src + 12)
50  src += POLY1305_BLOCK_SIZE
51  srclen -= POLY1305_BLOCK_SIZE
52  whether s[] has been set = true
55  Return srclen