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Optimizations for m25900

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Robert Gützkow 2021-04-11 14:13:47 +02:00
parent 9a4a8d942e
commit c7aaf07b41
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/**
* Author......: See docs/credits.txt and Robert Guetzkow
* License.....: MIT
*/
/*
* This code implement PBKDF2-HMAC-SHA256 but makes assumptions about the input length for optimizations.
* Please keep this in mind when trying to reuse code. The comments explain what those assumptions are.
*
* The implementation is based on inc_hash_sha256.cl and m10900-pure.cl
*/
#define NEW_SIMD_CODE
#ifdef KERNEL_STATIC
#include "inc_vendor.h"
#include "inc_types.h"
#include "inc_platform.cl"
#include "inc_common.cl"
#include "inc_simd.cl"
#include "inc_hash_sha256.cl"
#include "inc_cipher_aes.cl"
#endif
#define COMPARE_S "inc_comp_single.cl"
#define COMPARE_M "inc_comp_multi.cl"
typedef struct blocks
{
u32 b1[4];
u32 b2[4];
u32 b3[4];
} blocks_t;
typedef struct pbkdf2_sha256_tmp
{
u32x ipad_partial_hash[8];
u32x opad_partial_hash[8];
u32x digest[32];
u32x out[32];
} pbkdf2_sha256_tmp_t;
#define SHA256_STEP_NO_Wt(F0,F1,a,b,c,d,e,f,g,h,K) \
{ \
h += K; \
h = hc_add3 (h, SHA256_S3 (e), F1 (e,f,g)); \
d += h; \
h = hc_add3 (h, SHA256_S2 (a), F0 (a,b,c)); \
}
/*
* h = h + Kt + Wt -x => T1 (with Wt being 0)
* h + BSIG1(e) + CH(e,f,g) _|
* d += h - => d + T1 (d is used as e in the next step by switching the arguments.)
* h = h + BSIG0(a) + MAJ(a,b,c) - => T1 + T2 (h is used as a in the next step by switching the arguments.)
*/
#define ROUND_EXPAND() \
{ \
w0_t = SHA256_EXPAND (we_t, w9_t, w1_t, w0_t); \
w1_t = SHA256_EXPAND (wf_t, wa_t, w2_t, w1_t); \
w2_t = SHA256_EXPAND (w0_t, wb_t, w3_t, w2_t); \
w3_t = SHA256_EXPAND (w1_t, wc_t, w4_t, w3_t); \
w4_t = SHA256_EXPAND (w2_t, wd_t, w5_t, w4_t); \
w5_t = SHA256_EXPAND (w3_t, we_t, w6_t, w5_t); \
w6_t = SHA256_EXPAND (w4_t, wf_t, w7_t, w6_t); \
w7_t = SHA256_EXPAND (w5_t, w0_t, w8_t, w7_t); \
w8_t = SHA256_EXPAND (w6_t, w1_t, w9_t, w8_t); \
w9_t = SHA256_EXPAND (w7_t, w2_t, wa_t, w9_t); \
wa_t = SHA256_EXPAND (w8_t, w3_t, wb_t, wa_t); \
wb_t = SHA256_EXPAND (w9_t, w4_t, wc_t, wb_t); \
wc_t = SHA256_EXPAND (wa_t, w5_t, wd_t, wc_t); \
wd_t = SHA256_EXPAND (wb_t, w6_t, we_t, wd_t); \
we_t = SHA256_EXPAND (wc_t, w7_t, wf_t, we_t); \
wf_t = SHA256_EXPAND (wd_t, w8_t, w0_t, wf_t); \
}
#define ROUND_STEP(i) \
{ \
SHA256_STEP (SHA256_F0o, SHA256_F1o, a, b, c, d, e, f, g, h, w0_t, k_sha256[i + 0]); \
SHA256_STEP (SHA256_F0o, SHA256_F1o, h, a, b, c, d, e, f, g, w1_t, k_sha256[i + 1]); \
SHA256_STEP (SHA256_F0o, SHA256_F1o, g, h, a, b, c, d, e, f, w2_t, k_sha256[i + 2]); \
SHA256_STEP (SHA256_F0o, SHA256_F1o, f, g, h, a, b, c, d, e, w3_t, k_sha256[i + 3]); \
SHA256_STEP (SHA256_F0o, SHA256_F1o, e, f, g, h, a, b, c, d, w4_t, k_sha256[i + 4]); \
SHA256_STEP (SHA256_F0o, SHA256_F1o, d, e, f, g, h, a, b, c, w5_t, k_sha256[i + 5]); \
SHA256_STEP (SHA256_F0o, SHA256_F1o, c, d, e, f, g, h, a, b, w6_t, k_sha256[i + 6]); \
SHA256_STEP (SHA256_F0o, SHA256_F1o, b, c, d, e, f, g, h, a, w7_t, k_sha256[i + 7]); \
SHA256_STEP (SHA256_F0o, SHA256_F1o, a, b, c, d, e, f, g, h, w8_t, k_sha256[i + 8]); \
SHA256_STEP (SHA256_F0o, SHA256_F1o, h, a, b, c, d, e, f, g, w9_t, k_sha256[i + 9]); \
SHA256_STEP (SHA256_F0o, SHA256_F1o, g, h, a, b, c, d, e, f, wa_t, k_sha256[i + 10]); \
SHA256_STEP (SHA256_F0o, SHA256_F1o, f, g, h, a, b, c, d, e, wb_t, k_sha256[i + 11]); \
SHA256_STEP (SHA256_F0o, SHA256_F1o, e, f, g, h, a, b, c, d, wc_t, k_sha256[i + 12]); \
SHA256_STEP (SHA256_F0o, SHA256_F1o, d, e, f, g, h, a, b, c, wd_t, k_sha256[i + 13]); \
SHA256_STEP (SHA256_F0o, SHA256_F1o, c, d, e, f, g, h, a, b, we_t, k_sha256[i + 14]); \
SHA256_STEP (SHA256_F0o, SHA256_F1o, b, c, d, e, f, g, h, a, wf_t, k_sha256[i + 15]); \
}
DECLSPEC void init_sha256_ctx(sha256_ctx_vector_t *ctx)
{
ctx->h[0] = SHA256M_A;
ctx->h[1] = SHA256M_B;
ctx->h[2] = SHA256M_C;
ctx->h[3] = SHA256M_D;
ctx->h[4] = SHA256M_E;
ctx->h[5] = SHA256M_F;
ctx->h[6] = SHA256M_G;
ctx->h[7] = SHA256M_H;
}
DECLSPEC void init_ipad(sha256_ctx_vector_t *ctx, const u32x *w0, const u32x *w1, const u32x *w2, const u32x *w3)
{
init_sha256_ctx(ctx);
ctx->w0[0] = w0[0] ^ 0x36363636;
ctx->w0[1] = w0[1] ^ 0x36363636;
ctx->w0[2] = w0[2] ^ 0x36363636;
ctx->w0[3] = w0[3] ^ 0x36363636;
ctx->w1[0] = w1[0] ^ 0x36363636;
ctx->w1[1] = w1[1] ^ 0x36363636;
ctx->w1[2] = w1[2] ^ 0x36363636;
ctx->w1[3] = w1[3] ^ 0x36363636;
ctx->w2[0] = w2[0] ^ 0x36363636;
ctx->w2[1] = w2[1] ^ 0x36363636;
ctx->w2[2] = w2[2] ^ 0x36363636;
ctx->w2[3] = w2[3] ^ 0x36363636;
ctx->w3[0] = w3[0] ^ 0x36363636;
ctx->w3[1] = w3[1] ^ 0x36363636;
ctx->w3[2] = w3[2] ^ 0x36363636;
ctx->w3[3] = w3[3] ^ 0x36363636;
}
DECLSPEC void init_opad(sha256_ctx_vector_t *ctx, const u32 *w0, const u32 *w1, const u32 *w2, const u32 *w3)
{
init_sha256_ctx(ctx);
ctx->w0[0] = w0[0] ^ 0x5c5c5c5c;
ctx->w0[1] = w0[1] ^ 0x5c5c5c5c;
ctx->w0[2] = w0[2] ^ 0x5c5c5c5c;
ctx->w0[3] = w0[3] ^ 0x5c5c5c5c;
ctx->w1[0] = w1[0] ^ 0x5c5c5c5c;
ctx->w1[1] = w1[1] ^ 0x5c5c5c5c;
ctx->w1[2] = w1[2] ^ 0x5c5c5c5c;
ctx->w1[3] = w1[3] ^ 0x5c5c5c5c;
ctx->w2[0] = w2[0] ^ 0x5c5c5c5c;
ctx->w2[1] = w2[1] ^ 0x5c5c5c5c;
ctx->w2[2] = w2[2] ^ 0x5c5c5c5c;
ctx->w2[3] = w2[3] ^ 0x5c5c5c5c;
ctx->w3[0] = w3[0] ^ 0x5c5c5c5c;
ctx->w3[1] = w3[1] ^ 0x5c5c5c5c;
ctx->w3[2] = w3[2] ^ 0x5c5c5c5c;
ctx->w3[3] = w3[3] ^ 0x5c5c5c5c;
}
DECLSPEC void sha256_transform_hash(const u32x *w0, const u32x *w1, const u32x *w2, const u32x *w3, u32x *digest)
{
/*
* This function assumes that the input is a hash of length 256 bit with padding applied and that the total length
* of all blocks is 768 bit. This allows to perform optimizations in the message schedule and hash round since some
* words are known to be all zero bits, thus not contributing to some of the calculation. Additionally, calculations
* for words that are known to be constant have been precomputed.
*
* The 256 bit hash is located in the first 8 words (index 0 to 7), followed by one word that has one bit set.
* The length is represented as a 128 bit integer in the last 4 words. However, since for the HMAC calculation
* the total size of all blocks doesn't exceed 768 bit, including ipad and opad respectively, only the last
* word (index 15) contains the length bits. Thus the 32 bit words from index 9 to 14 are all zero bits.
* Whenever these words would be used by the message schedule in
* Wt = SSIG1(W(t-2)) + W(t-7) + SSIG0(W(t-15)) + W(t-16) [1]
* or in the hash round in
* T1 = h + BSIG1(e) + CH(e,f,g) + Kt + Wt [1]
* the calculation can be simplified to remove the operand.
*
* The word at index 8, with one bit set, and the word at index 15, containing the length, are know to be constant.
* Therefore, the operations where they are used as an operand can be partially precomputed. For the message schedule
* this is possible for SSIG1(W(t-2)) and SSIG0(W(t-15)). In the hash round the Kt + Wt can be precomputed when Wt
* is constant.
*
* Like sha256_transform_vector it performs the message schedule and hash round calculation jointly for 16 of the
* 32 bit words. This requires fewer variables and thus less memory to hold the state, compared to calculating
* the whole message schedule first and then performing the hash round.
*
* [1] RFC 6234, section 6.2, https://tools.ietf.org/html/rfc6234#section-6.2
*/
u32x a = digest[0];
u32x b = digest[1];
u32x c = digest[2];
u32x d = digest[3];
u32x e = digest[4];
u32x f = digest[5];
u32x g = digest[6];
u32x h = digest[7];
// This assignment is equivalent to the message schedule for the first 16 words.
u32x w0_t = w0[0];
u32x w1_t = w0[1];
u32x w2_t = w0[2];
u32x w3_t = w0[3];
u32x w4_t = w1[0];
u32x w5_t = w1[1];
u32x w6_t = w1[2];
u32x w7_t = w1[3];
u32x w8_t = w2[0];
u32x w9_t = w2[1];
u32x wa_t = w2[2];
u32x wb_t = w2[3];
u32x wc_t = w3[0];
u32x wd_t = w3[1];
u32x we_t = w3[2];
u32x wf_t = w3[3];
// The first 16 words have already been assigned, perform the first hash round. Don't use W_t when zero.
SHA256_STEP(SHA256_F0o, SHA256_F1o, a, b, c, d, e, f, g, h, w0_t, k_sha256[0]);
SHA256_STEP(SHA256_F0o, SHA256_F1o, h, a, b, c, d, e, f, g, w1_t, k_sha256[1]);
SHA256_STEP(SHA256_F0o, SHA256_F1o, g, h, a, b, c, d, e, f, w2_t, k_sha256[2]);
SHA256_STEP(SHA256_F0o, SHA256_F1o, f, g, h, a, b, c, d, e, w3_t, k_sha256[3]);
SHA256_STEP(SHA256_F0o, SHA256_F1o, e, f, g, h, a, b, c, d, w4_t, k_sha256[4]);
SHA256_STEP(SHA256_F0o, SHA256_F1o, d, e, f, g, h, a, b, c, w5_t, k_sha256[5]);
SHA256_STEP(SHA256_F0o, SHA256_F1o, c, d, e, f, g, h, a, b, w6_t, k_sha256[6]);
SHA256_STEP(SHA256_F0o, SHA256_F1o, b, c, d, e, f, g, h, a, w7_t, k_sha256[7]);
SHA256_STEP_NO_Wt(SHA256_F0o, SHA256_F1o, a, b, c, d, e, f, g, h, 0x5807aa98);
SHA256_STEP_NO_Wt(SHA256_F0o, SHA256_F1o, h, a, b, c, d, e, f, g, k_sha256[9]);
SHA256_STEP_NO_Wt(SHA256_F0o, SHA256_F1o, g, h, a, b, c, d, e, f, k_sha256[10]);
SHA256_STEP_NO_Wt(SHA256_F0o, SHA256_F1o, f, g, h, a, b, c, d, e, k_sha256[11]);
SHA256_STEP_NO_Wt(SHA256_F0o, SHA256_F1o, e, f, g, h, a, b, c, d, k_sha256[12]);
SHA256_STEP_NO_Wt(SHA256_F0o, SHA256_F1o, d, e, f, g, h, a, b, c, k_sha256[13]);
SHA256_STEP_NO_Wt(SHA256_F0o, SHA256_F1o, c, d, e, f, g, h, a, b, k_sha256[14]);
SHA256_STEP_NO_Wt(SHA256_F0o, SHA256_F1o, b, c, d, e, f, g, h, a, 0xc19bf474);
// The message schedule for words 16 to 32 can skip calculations when W_t is zero
w0_t = SHA256_S0(w1_t) + w0_t;
w1_t = 0x01e00000 + SHA256_S0(w2_t) + w1_t;
w2_t = SHA256_S1(w0_t) + SHA256_S0(w3_t) + w2_t;
w3_t = SHA256_S1(w1_t) + SHA256_S0(w4_t) + w3_t;
w4_t = SHA256_S1(w2_t) + SHA256_S0(w5_t) + w4_t;
w5_t = SHA256_S1(w3_t) + SHA256_S0(w6_t) + w5_t;
w6_t = SHA256_S1(w4_t) + wf_t + SHA256_S0(w7_t) + w6_t;
w7_t = SHA256_S1(w5_t) + w0_t + 0x11002000 + w7_t;
w8_t = SHA256_S1(w6_t) + w1_t + w8_t;
w9_t = SHA256_S1(w7_t) + w2_t;
wa_t = SHA256_S1(w8_t) + w3_t;
wb_t = SHA256_S1(w9_t) + w4_t;
wc_t = SHA256_S1(wa_t) + w5_t;
wd_t = SHA256_S1(wb_t) + w6_t;
we_t = SHA256_S1(wc_t) + w7_t + 0x00c00066;
wf_t = SHA256_S1(wd_t) + w8_t + SHA256_S0(w0_t) + wf_t;
// Following rounds do not have words that are guaranteed to be zero or constant, thus perform full calculations.
ROUND_STEP(16);
ROUND_EXPAND();
ROUND_STEP(32);
ROUND_EXPAND();
ROUND_STEP(48);
digest[0] += a;
digest[1] += b;
digest[2] += c;
digest[3] += d;
digest[4] += e;
digest[5] += f;
digest[6] += g;
digest[7] += h;
}
DECLSPEC void partial_hashes_ipad_opad(pbkdf2_sha256_tmp *tmp, GLOBAL_AS const u32 *pwd)
{
/*
* This functions assumes that passwords are smaller than 512 bit, which is the case for KNX IP Secure as the ETS 5 limits
* the maximum length to 20 characters.
*
* Both ipad and opad remain constant for a given password throughout the PBKDF2 computation. Futhermore they are both
* 512 bit long, which is exactly the block size of SHA-256. Thus, it is possible to compute a partial hash for both
* without knowing what will be concatenated to ipad and opad, as the processing in SHA-256 happens in blocks of 512 bit.
* The resulting intermediate result can be stored and reused in all rounds of the PBKDF.
*/
u32x w0[4];
u32x w1[4];
u32x w2[4];
u32x w3[4];
w0[0] = make_u32x (hc_swap32_S (pwd[ 0]));
w0[1] = make_u32x (hc_swap32_S (pwd[ 1]));
w0[2] = make_u32x (hc_swap32_S (pwd[ 2]));
w0[3] = make_u32x (hc_swap32_S (pwd[ 3]));
w1[0] = make_u32x (hc_swap32_S (pwd[ 4]));
w1[1] = make_u32x (hc_swap32_S (pwd[ 5]));
w1[2] = make_u32x (hc_swap32_S (pwd[ 6]));
w1[3] = make_u32x (hc_swap32_S (pwd[ 7]));
w2[0] = make_u32x (hc_swap32_S (pwd[ 8]));
w2[1] = make_u32x (hc_swap32_S (pwd[ 9]));
w2[2] = make_u32x (hc_swap32_S (pwd[10]));
w2[3] = make_u32x (hc_swap32_S (pwd[11]));
w3[0] = make_u32x (hc_swap32_S (pwd[12]));
w3[1] = make_u32x (hc_swap32_S (pwd[13]));
w3[2] = make_u32x (hc_swap32_S (pwd[14]));
w3[3] = make_u32x (hc_swap32_S (pwd[15]));
sha256_hmac_ctx_vector_t sha256_hmac_ctx_vector;
// The partial hash is equivalent to computing the hash of just that one block
init_ipad (&sha256_hmac_ctx_vector.ipad, w0, w1, w2, w3);
init_opad (&sha256_hmac_ctx_vector.opad, w0, w1, w2, w3);
sha256_transform_vector (sha256_hmac_ctx_vector.ipad.w0,
sha256_hmac_ctx_vector.ipad.w1,
sha256_hmac_ctx_vector.ipad.w2,
sha256_hmac_ctx_vector.ipad.w3,
sha256_hmac_ctx_vector.ipad.h);
sha256_transform_vector (sha256_hmac_ctx_vector.opad.w0,
sha256_hmac_ctx_vector.opad.w1,
sha256_hmac_ctx_vector.opad.w2,
sha256_hmac_ctx_vector.opad.w3,
sha256_hmac_ctx_vector.opad.h);
tmp->ipad_partial_hash[0] = sha256_hmac_ctx_vector.ipad.h[0];
tmp->ipad_partial_hash[1] = sha256_hmac_ctx_vector.ipad.h[1];
tmp->ipad_partial_hash[2] = sha256_hmac_ctx_vector.ipad.h[2];
tmp->ipad_partial_hash[3] = sha256_hmac_ctx_vector.ipad.h[3];
tmp->ipad_partial_hash[4] = sha256_hmac_ctx_vector.ipad.h[4];
tmp->ipad_partial_hash[5] = sha256_hmac_ctx_vector.ipad.h[5];
tmp->ipad_partial_hash[6] = sha256_hmac_ctx_vector.ipad.h[6];
tmp->ipad_partial_hash[7] = sha256_hmac_ctx_vector.ipad.h[7];
tmp->opad_partial_hash[0] = sha256_hmac_ctx_vector.opad.h[0];
tmp->opad_partial_hash[1] = sha256_hmac_ctx_vector.opad.h[1];
tmp->opad_partial_hash[2] = sha256_hmac_ctx_vector.opad.h[2];
tmp->opad_partial_hash[3] = sha256_hmac_ctx_vector.opad.h[3];
tmp->opad_partial_hash[4] = sha256_hmac_ctx_vector.opad.h[4];
tmp->opad_partial_hash[5] = sha256_hmac_ctx_vector.opad.h[5];
tmp->opad_partial_hash[6] = sha256_hmac_ctx_vector.opad.h[6];
tmp->opad_partial_hash[7] = sha256_hmac_ctx_vector.opad.h[7];
}
DECLSPEC void hmac_sha256(u32x *w0, u32x *w1, u32x *w2, u32x *w3, u32x *ipad_partial_hash, u32x *opad_partial_hash, u32x *digest)
{
/*
* This function assumes that the input has been padded according to RFC 6234 [3].
*
* [3] RFC 6234, section 4.1, https://tools.ietf.org/html/rfc6234#section-4.1
*/
digest[0] = ipad_partial_hash[0];
digest[1] = ipad_partial_hash[1];
digest[2] = ipad_partial_hash[2];
digest[3] = ipad_partial_hash[3];
digest[4] = ipad_partial_hash[4];
digest[5] = ipad_partial_hash[5];
digest[6] = ipad_partial_hash[6];
digest[7] = ipad_partial_hash[7];
sha256_transform_vector (w0, w1, w2, w3, digest);
w0[0] = digest[0];
w0[1] = digest[1];
w0[2] = digest[2];
w0[3] = digest[3];
w1[0] = digest[4];
w1[1] = digest[5];
w1[2] = digest[6];
w1[3] = digest[7];
w2[0] = 0x80000000;
w2[1] = 0;
w2[2] = 0;
w2[3] = 0;
w3[0] = 0;
w3[1] = 0;
w3[2] = 0;
w3[3] = 768; // 512 bit for they ipad and 256 bit for the previous hash
digest[0] = opad_partial_hash[0];
digest[1] = opad_partial_hash[1];
digest[2] = opad_partial_hash[2];
digest[3] = opad_partial_hash[3];
digest[4] = opad_partial_hash[4];
digest[5] = opad_partial_hash[5];
digest[6] = opad_partial_hash[6];
digest[7] = opad_partial_hash[7];
sha256_transform_hash (w0, w1, w2, w3, digest);
}
DECLSPEC void hmac_sha256_for_hash(u32x *w0, u32x *w1, u32x *w2, u32x *w3, u32x *ipad_partial_hash, u32x *opad_partial_hash, u32x *digest)
{
/*
* This function assumes that the input is the block containing the hash of 256 bit length and has been padded according to RFC 6234 [3]
*
* [3] RFC 6234, section 4.1, https://tools.ietf.org/html/rfc6234#section-4.1
*/
digest[0] = ipad_partial_hash[0];
digest[1] = ipad_partial_hash[1];
digest[2] = ipad_partial_hash[2];
digest[3] = ipad_partial_hash[3];
digest[4] = ipad_partial_hash[4];
digest[5] = ipad_partial_hash[5];
digest[6] = ipad_partial_hash[6];
digest[7] = ipad_partial_hash[7];
sha256_transform_hash (w0, w1, w2, w3, digest);
w0[0] = digest[0];
w0[1] = digest[1];
w0[2] = digest[2];
w0[3] = digest[3];
w1[0] = digest[4];
w1[1] = digest[5];
w1[2] = digest[6];
w1[3] = digest[7];
w2[0] = 0x80000000;
w2[1] = 0;
w2[2] = 0;
w2[3] = 0;
w3[0] = 0;
w3[1] = 0;
w3[2] = 0;
w3[3] = 768; // 512 bit for they ipad and 256 bit for the previous hash
digest[0] = opad_partial_hash[0];
digest[1] = opad_partial_hash[1];
digest[2] = opad_partial_hash[2];
digest[3] = opad_partial_hash[3];
digest[4] = opad_partial_hash[4];
digest[5] = opad_partial_hash[5];
digest[6] = opad_partial_hash[6];
digest[7] = opad_partial_hash[7];
sha256_transform_hash (w0, w1, w2, w3, digest);
}
DECLSPEC void hmac_sha256_first_round(pbkdf2_sha256_tmp *tmp, GLOBAL_AS const u32 *salt, const int len)
{
/*
* This function assumes that the salt is less than 56 byte (448 bit), which is the case for
* KNX IP Secure as the salt is constant and 46 byte (368 bit) long.
*/
u32x w0[4];
u32x w1[4];
u32x w2[4];
u32x w3[4];
w0[0] = make_u32x (hc_swap32_S (salt[ 0]));
w0[1] = make_u32x (hc_swap32_S (salt[ 1]));
w0[2] = make_u32x (hc_swap32_S (salt[ 2]));
w0[3] = make_u32x (hc_swap32_S (salt[ 3]));
w1[0] = make_u32x (hc_swap32_S (salt[ 4]));
w1[1] = make_u32x (hc_swap32_S (salt[ 5]));
w1[2] = make_u32x (hc_swap32_S (salt[ 6]));
w1[3] = make_u32x (hc_swap32_S (salt[ 7]));
w2[0] = make_u32x (hc_swap32_S (salt[ 8]));
w2[1] = make_u32x (hc_swap32_S (salt[ 9]));
w2[2] = make_u32x (hc_swap32_S (salt[10]));
w2[3] = make_u32x (hc_swap32_S (salt[11]));
w3[0] = make_u32x (hc_swap32_S (salt[12]));
w3[1] = make_u32x (hc_swap32_S (salt[13]));
w3[2] = make_u32x (hc_swap32_S (salt[14]));
w3[3] = make_u32x (hc_swap32_S (salt[15]));
/*
* PBKDF2 requires the one-based 32 bit big-endian block index to be appended to the salt [2].
* Since the salt is used in the first block, that integer is 1.
*
* [2] RFC 8018, section 5.2, item 3, https://tools.ietf.org/html/rfc8018#section-5.2
*/
u32x i0[4];
u32x i1[4];
u32x i2[4];
u32x i3[4];
i0[0] = 1;
i0[1] = 0;
i0[2] = 0;
i0[3] = 0;
i1[0] = 0;
i1[1] = 0;
i1[2] = 0;
i1[3] = 0;
i2[0] = 0;
i2[1] = 0;
i2[2] = 0;
i2[3] = 0;
i3[0] = 0;
i3[1] = 0;
i3[2] = 0;
i3[3] = 0;
switch_buffer_by_offset_be(i0, i1, i2, i3, len & 63); // Shift to the correct position after the end of the salt
w0[0] |= i0[0];
w0[1] |= i0[1];
w0[2] |= i0[2];
w0[3] |= i0[3];
w1[0] |= i1[0];
w1[1] |= i1[1];
w1[2] |= i1[2];
w1[3] |= i1[3];
w2[0] |= i2[0];
w2[1] |= i2[1];
w2[2] |= i2[2];
w2[3] |= i2[3];
w3[0] |= i3[0];
w3[1] |= i3[1];
w3[2] |= i3[2];
w3[3] |= i3[3];
// Updated length with the 32 bit block index appended
MAYBE_VOLATILE const int len_updated = len + 4;
/*
* Pad salt to 512 bit using the padding scheme described in RFC 6234 [3]
*
* [3] RFC 6234, section 4.1, https://tools.ietf.org/html/rfc6234#section-4.1
*/
append_0x80_4x4 (w0, w1, w2, w3, (len_updated & 63) ^ 3);
w3[2] = 0;
w3[3] = len_updated * 8 + 512; // Length in bits, ipad is 512 bit
hmac_sha256 (w0, w1, w2, w3, tmp->ipad_partial_hash, tmp->opad_partial_hash, tmp->digest);
tmp->out[0] = tmp->digest[0];
tmp->out[1] = tmp->digest[1];
tmp->out[2] = tmp->digest[2];
tmp->out[3] = tmp->digest[3];
tmp->out[4] = tmp->digest[4];
tmp->out[5] = tmp->digest[5];
tmp->out[6] = tmp->digest[6];
tmp->out[7] = tmp->digest[7];
}
DECLSPEC void aes128_encrypt_cbc (const u32 *aes_ks, u32 *aes_iv, const u32 *in, u32 *out, SHM_TYPE u32 *s_te0, SHM_TYPE u32 *s_te1, SHM_TYPE u32 *s_te2, SHM_TYPE u32 *s_te3, SHM_TYPE u32 *s_te4)
{
u32 in_s[4];
in_s[0] = in[0];
in_s[1] = in[1];
in_s[2] = in[2];
in_s[3] = in[3];
in_s[0] ^= aes_iv[0];
in_s[1] ^= aes_iv[1];
in_s[2] ^= aes_iv[2];
in_s[3] ^= aes_iv[3];
aes128_encrypt (aes_ks, in_s, out, s_te0, s_te1, s_te2, s_te3, s_te4);
aes_iv[0] = out[0];
aes_iv[1] = out[1];
aes_iv[2] = out[2];
aes_iv[3] = out[3];
}
KERNEL_FQ void m25900_init(KERN_ATTR_TMPS(pbkdf2_sha256_tmp_t))
{
const u64 gid = get_global_id(0);
if (gid >= gid_max) return;
partial_hashes_ipad_opad(&tmps[gid], pws[gid].i);
hmac_sha256_first_round(&tmps[gid], salt_bufs[SALT_POS].salt_buf, salt_bufs[SALT_POS].salt_len);
}
KERNEL_FQ void m25900_loop(KERN_ATTR_TMPS(pbkdf2_sha256_tmp_t))
{
const u64 gid = get_global_id(0);
if ((gid * VECT_SIZE) >= gid_max) return;
u32x* ipad_partial_hash = tmps[gid].ipad_partial_hash;
u32x* opad_partial_hash = tmps[gid].opad_partial_hash;
u32x* digest = tmps[gid].digest;
u32x* out = tmps[gid].out;
for (u32 j = 0; j < loop_cnt; j++)
{
u32x w0[4];
u32x w1[4];
u32x w2[4];
u32x w3[4];
// Pad the 256 bit hash from the previous PBKDF2-HMAC-SHA256 round to 512 bit
w0[0] = digest[0];
w0[1] = digest[1];
w0[2] = digest[2];
w0[3] = digest[3];
w1[0] = digest[4];
w1[1] = digest[5];
w1[2] = digest[6];
w1[3] = digest[7];
w2[0] = 0x80000000;
w2[1] = 0;
w2[2] = 0;
w2[3] = 0;
w3[0] = 0;
w3[1] = 0;
w3[2] = 0;
w3[3] = 768; // 512 bit for they ipad and 256 bit for the previous hash
hmac_sha256_for_hash (w0, w1, w2, w3, ipad_partial_hash, opad_partial_hash, digest);
// XOR digest created by HMAC-SHA256 for the PBKDF2 round
out[0] ^= digest[0];
out[1] ^= digest[1];
out[2] ^= digest[2];
out[3] ^= digest[3];
out[4] ^= digest[4];
out[5] ^= digest[5];
out[6] ^= digest[6];
out[7] ^= digest[7];
}
}
KERNEL_FQ void m25900_comp(KERN_ATTR_TMPS_ESALT(pbkdf2_sha256_tmp_t, blocks_t))
{
/**
* base
*/
const u64 gid = get_global_id(0);
const u64 lid = get_local_id(0);
const u64 lsz = get_local_size(0);
/**
* aes shared
*/
#ifdef REAL_SHM
LOCAL_VK u32 s_td0[256];
LOCAL_VK u32 s_td1[256];
LOCAL_VK u32 s_td2[256];
LOCAL_VK u32 s_td3[256];
LOCAL_VK u32 s_td4[256];
LOCAL_VK u32 s_te0[256];
LOCAL_VK u32 s_te1[256];
LOCAL_VK u32 s_te2[256];
LOCAL_VK u32 s_te3[256];
LOCAL_VK u32 s_te4[256];
for (u32 i = lid; i < 256; i += lsz)
{
s_td0[i] = td0[i];
s_td1[i] = td1[i];
s_td2[i] = td2[i];
s_td3[i] = td3[i];
s_td4[i] = td4[i];
s_te0[i] = te0[i];
s_te1[i] = te1[i];
s_te2[i] = te2[i];
s_te3[i] = te3[i];
s_te4[i] = te4[i];
}
SYNC_THREADS();
#else
CONSTANT_AS u32a* s_td0 = td0;
CONSTANT_AS u32a* s_td1 = td1;
CONSTANT_AS u32a* s_td2 = td2;
CONSTANT_AS u32a* s_td3 = td3;
CONSTANT_AS u32a* s_td4 = td4;
CONSTANT_AS u32a* s_te0 = te0;
CONSTANT_AS u32a* s_te1 = te1;
CONSTANT_AS u32a* s_te2 = te2;
CONSTANT_AS u32a* s_te3 = te3;
CONSTANT_AS u32a* s_te4 = te4;
#endif
if (gid >= gid_max) return;
u32 key[4];
key[0] = tmps[gid].out[DGST_R0];
key[1] = tmps[gid].out[DGST_R1];
key[2] = tmps[gid].out[DGST_R2];
key[3] = tmps[gid].out[DGST_R3];
u32 aes_ks[44];
AES128_set_encrypt_key (aes_ks, key, s_te0, s_te1, s_te2, s_te3);
u32 b0[4] = { 0 };
u32 aes_cbc_iv[4] = { 0 };
u32 yn[4];
aes128_encrypt_cbc (aes_ks, aes_cbc_iv, b0, yn, s_te0, s_te1, s_te2, s_te3, s_te4);
aes128_encrypt_cbc (aes_ks, aes_cbc_iv, esalt_bufs[DIGESTS_OFFSET].b1, yn, s_te0, s_te1, s_te2, s_te3, s_te4);
aes128_encrypt_cbc (aes_ks, aes_cbc_iv, esalt_bufs[DIGESTS_OFFSET].b2, yn, s_te0, s_te1, s_te2, s_te3, s_te4);
aes128_encrypt_cbc (aes_ks, aes_cbc_iv, esalt_bufs[DIGESTS_OFFSET].b3, yn, s_te0, s_te1, s_te2, s_te3, s_te4);
u32 nonce[4];
nonce[0] = 0;
nonce[1] = 0;
nonce[2] = 0;
nonce[3] = 0x00ff0000; // already swapped
u32 s0[4];
aes128_encrypt(aes_ks, nonce, s0, s_te0, s_te1, s_te2, s_te3, s_te4);
const u32 r0 = yn[0] ^ s0[0];
const u32 r1 = yn[1] ^ s0[1];
const u32 r2 = yn[2] ^ s0[2];
const u32 r3 = yn[3] ^ s0[3];
#define il_pos 0
#ifdef KERNEL_STATIC
#include COMPARE_M
#endif
}