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-rw-r--r--src/libkeccak/digest.c303
-rw-r--r--src/libkeccak/digest.h19
-rw-r--r--src/libkeccak/state.h10
3 files changed, 287 insertions, 45 deletions
diff --git a/src/libkeccak/digest.c b/src/libkeccak/digest.c
index b6fd215..15c3640 100644
--- a/src/libkeccak/digest.c
+++ b/src/libkeccak/digest.c
@@ -19,15 +19,222 @@
#include "digest.h"
+
+/**
+ * X-macro-enabled listing of all intergers in [0, 7]
+ */
+#define LIST_8 X(0) X(1) X(2) X(3) X(4) X(5) X(6) X(7)
+
/**
- * Absorb the more of the message to the Keccak sponge
+ * X-macro-enabled listing of all intergers in [0, 23]
+ */
+#define LIST_24 LIST_8 X(8) X(9) X(10) X(11) X(12) X(13) X(14) X(15) \
+ X(16) X(17) X(18) X(19) X(20) X(21) X(22) X(23) X(24)
+
+/**
+ * X-macro-enabled listing of all intergers in [0, 24]
+ */
+#define LIST_25 LIST_24 X(24)
+
+
+
+#define X(N) (N % 5) * 5 + N / 5,
+/**
+ * The order the lanes should be read when absorbing or squeezing,
+ * it transposes the lanes in the sponge
+ */
+static const long LANE_TRANSPOSE_MAP[] = { LIST_25 };
+#undef X
+
+
+
+/**
+ * Keccak-f round constants
+ */
+static const int_fast64_t RC[] =
+ {
+ 0x0000000000000001LL, 0x0000000000008082LL, 0x800000000000808ALL, 0x8000000080008000LL,
+ 0x000000000000808BLL, 0x0000000080000001LL, 0x8000000080008081LL, 0x8000000000008009LL,
+ 0x000000000000008ALL, 0x0000000000000088LL, 0x0000000080008009LL, 0x000000008000000ALL,
+ 0x000000008000808BLL, 0x800000000000008BLL, 0x8000000000008089LL, 0x8000000000008003LL,
+ 0x8000000000008002LL, 0x8000000000000080LL, 0x000000000000800ALL, 0x800000008000000ALL,
+ 0x8000000080008081LL, 0x8000000000008080LL, 0x0000000080000001LL, 0x8000000080008008LL
+ };
+
+
+
+/**
+ * Convert a chunk of bytes to a lane
*
- * @param state The hashing state
- * @param msg The partial message
- * @param msglen The length of the partial message
+ * @param state The hashing state
*/
-void libkeccak_update(libkeccak_state_t* restrict state, const char* restrict msg, size_t msglen)
+static __attribute__((nonnull, nothrow))
+void libkeccak_f(libkeccak_state_t* restrict state)
{
+ long i = 0, nr = state->nr;
+ if (nr == 24)
+ {
+#define X(N) libkeccak_f_round64(state, RC[N]);
+ LIST_24
+#undef X
+ }
+ else
+ for (; nr--; i++)
+ libkeccak_f_round(state, RC[i] & state->wmod);
+}
+
+
+/**
+ * Convert a chunk of bytes to a lane
+ *
+ * @param message The message
+ * @param msglen The length of the message
+ * @param rr Bitrate in bytes
+ * @param ww Word size in bytes
+ * @param off The offset in the message
+ * @return The lane
+ */
+static inline __attribute__((leaf, nonnull, nothrow, pure))
+int_fast64_t libkeccak_to_lane(const char* restrict message, size_t msglen, long rr, long ww, size_t off)
+{
+ long n = (long)((msglen < (size_t)rr ? msglen : (size_t)rr) - off);
+ int_fast64_t rc = 0;
+ message += off
+ while (ww--)
+ {
+ rc <<= 8;
+ rc |= __builtin_expect(ww < n, 1) ? (int_fast64_t)(unsigned char)(message[ww]) : 0L;
+ }
+ return rc;
+}
+
+
+/**
+ * 64-bit lane version of `libkeccak_to_lane`
+ *
+ * @param message The message
+ * @param msglen The length of the message
+ * @param rr Bitrate in bytes
+ * @param off The offset in the message
+ * @return The lane
+ */
+static inline __attribute__((leaf, nonnull, nothrow, pure, hot))
+int_fast64_t libkeccak_to_lane64(const char* restrict message, size_t msglen, long rr, size_t off)
+{
+ long n = (long)((msglen < (size_t)rr ? msglen : (size_t)rr) - off);
+ int_fast64_t rc = 0;
+ message += off;
+#define X(N) if (__builtin_expect(N < n, 1)) rc |= (int_fast64_t)(unsigned char)(message[N]) << (N * 8); \
+ else return rc;
+ LIST_8
+#undef X
+ return rc;
+}
+
+
+static __attribute__((leaf, nonnull))
+void libkeccak_pad10star1(libkeccak_state_t* restrict state, long bits, long* restrict outlen)
+{
+ /* TODO */
+}
+
+
+/**
+ * Perform the absorption phase
+ *
+ * @param state The hashing state
+ * @param len The number of bytes from `state->M` to absorb
+ */
+static __attribute__((nonnull, nothrow))
+void libkeccak_absorption_phase(libkeccak_state_t* restrict state, size_t len)
+{
+ long i = len / rr, w = state->w, rr = state->r >> 3, ww = state->w >> 3;
+ const char* restrict message = state->M;
+ if (__builtin_expect(ww >= 8, 1)) /* ww > 8 is impossible, it is just for optimisation possibilities. */
+ while (i--)
+ {
+#define X(N) state->S[N] ^= libkeccak_to_lane64(message, len, rr, LANE_TRANSPOSE_MAP[N] * 8);
+ LIST_25
+#undef X
+ libkeccak_f(state);
+ message += rr;
+ len -= rr;
+ }
+ else
+ while (i--)
+ {
+#define X(N) state->S[N] ^= libkeccak_to_lane(message, len, rr, ww, LANE_TRANSPOSE_MAP[N] * ww);
+ LIST_25
+#undef X
+ libkeccak_f(state);
+ message += rr;
+ len -= rr;
+ }
+}
+
+
+/**
+ * Perform the squeezing phase
+ *
+ * @param state The hashing state
+ * @param rr The bitrate in bytes
+ * @param nn The output size in bytes, rounded up to whole bytes
+ * @param ww The word size in bytes
+ * @param hashsum Output paramter for the hashsum
+ */
+static __attribute__((nonnull, nothrow, hot))
+void libkeccak_squeezing_phase(libkeccak_state_t* restrict state,
+ long rr, long nn, long ww, char* restrict hashsum)
+{
+ long i, j = 0, k, ptr = 0, ni = rr > 25 ? 25 : rr, olen = state->n;
+ int_fast64_t v;
+ while (olen > 0)
+ {
+ for (i = 0; (i < ni) && (j < nn); i++)
+ {
+ v = state->S[LANE_TRANSPOSE_MAP[i]];
+ for (k = 0; (k++ < ww) && (j++ < nn); v >>= 8)
+ hashsum[ptr++] = (char)v;
+ }
+ if (olen -= state->r, olen > 0)
+ libkeccak_f(state);
+ }
+ if (state->n & 7)
+ hashsum[nn - 1] &= (1 << (state->n & 7)) - 1;
+}
+
+
+/**
+ * Absorb more of the message to the Keccak sponge
+ *
+ * @param state The hashing state
+ * @param msg The partial message
+ * @param msglen The length of the partial message
+ * @return Zero on success, -1 on error
+ */
+int libkeccak_update(libkeccak_state_t* restrict state, const char* restrict msg, size_t msglen)
+{
+ size_t len;
+ char* restrict new;
+
+ if (state->mptr + msglen > state->mlen)
+ {
+ state->mlen += msglen;
+ new = realloc(state->M, state->mlen * sizeof(char)); /* FIXME insecure */
+ if (new == NULL)
+ return state->mlen -= msglen, -1;
+ state->M = new;
+ }
+ __builtin_memcpy(state->M + state->mptr, msg, msglen * sizeof(char));
+ state->mptr += msglen;
+ len = state->mptr;
+ len -= state->mptr % ((state->r * state->b) >> 3);
+ state->mptr -= len;
+
+ libkeccak_absorption_phase(state, len);
+ __builtin_memmove(state->M, state->M + len, state->mptr * state->sizeof(char));
+
+ return 0;
}
@@ -38,13 +245,70 @@ void libkeccak_update(libkeccak_state_t* restrict state, const char* restrict ms
* @param msg The rest of the message, may be `NULL`
* @param msglen The length of the partial message
* @param bits The number of bits at the end of the message not covered by `msglen`
- * @param suffix The suffix concatenate to the message
+ * @param suffix The suffix concatenate to the message, only '1':s and '0':s, and NUL-termination
* @param hashsum Output paramter for the hashsum, may be `NULL`
* @return Zero on success, -1 on error
*/
int libkeccak_digest(libkeccak_state_t* restrict state, const char* restrict msg, size_t msglen,
size_t bits, const char* restrict suffix, char* restrict hashsum)
{
+ long len, ni, i, j = 0, k, ptr = 0;
+ long rr = state->r >> 3;
+ long ww = state->w >> 3;
+ long nn = (state->n + 7) >> 3;
+ long suffix_len = suffix ? strlen(suffix) : 0;
+ const char* restrict message = msg;
+ char* restrict new;
+
+ if (msg == NULL)
+ msglen = bits = 0;
+ else
+ {
+ msglen += bits >> 3;
+ if ((bits &= 7))
+ msg[msglen] &= (1 << bits) - 1;
+ }
+
+ if (state->mptr + msglen + ((bits + suffix_len + 7) >> 3) > state->mlen)
+ {
+ state->mlen += msglen + ((bits + suffix_len + 7) >> 3);
+ new = realloc(state->M, state->mlen * sizeof(char)); /* FIXME insecure */
+ if (new == NULL)
+ return state->mlen -= msglen + ((bits + suffix_len + 7) >> 3), -1;
+ state->M = new;
+ }
+
+ if (bits)
+ state->M[msglen] = message[msglen];
+ if (__builtin_expect(!!suffix_len, 1))
+ {
+ if (bits == 0)
+ state->M[msglen] = 0;
+ while (suffix_len--)
+ {
+ state->M[msglen] |= (*suffix++ & 1) << bits++;
+ if (bits == 8)
+ bits = 0, state->M[++msglen] = 0;
+ }
+ }
+ if (bits)
+ msglen++;
+
+ if (msglen)
+ __builtin_memcpy(state->M + state->mptr, message, msglen * sizeof(char));
+ state->mptr += msglen;
+
+ // libkeccak_pad10star1(state->M, state->mptr, state->r, bits, &len); /* TODO */
+
+ libkeccak_absorption_phase(state, len);
+
+ if (hashsum != NULL)
+ libkeccak_squeezing_phase(state, rr, nn, ww, hashsum);
+ else
+ for (i = (state->n - 1) / this->r; i--;)
+ libkeccak_f(state);
+
+ return 0
}
@@ -83,31 +347,8 @@ void libkeccak_fast_squeeze(libkeccak_state_t* restrict state, long times)
*/
void libkeccak_squeeze(libkeccak_state_t* restrict state, char* restrict hashsum)
{
- long ww, nn, olen, i, j, k, ptr, rr, ni;
- int_fast64_t v;
-
+ long ww = state->w >> 3, nn = (state->n + 7) >> 3, rr = state->r >> 3;
libkeccak_f(state);
-
- ww = state->w >> 3;
- nn = (state->n + 7) >> 3;
- olen = state->n;
- j = ptr = 0;
- rr = state->r >> 3;
- ni = rr > 25 ? 25 : rr;
-
- while (olen > 0)
- {
- for (i = 0; (i < ni) && (j < nn); i++)
- {
- v = state->S[(i % 5) * 5 + i / 5];
- for (k = 0; k++ < ww; v >>= 8)
- if (j++ < nn)
- hashsum[ptr++] = (char)v;
- }
- if (olen -= state->r, olen > 0)
- libkeccak_f(state);
- }
- if (n & 7)
- n[nn - 1] &= (1 << (n & 7)) - 1;
+ libkeccak_squeezing_phase(state, rr, nn, ww, hashsum);
}
diff --git a/src/libkeccak/digest.h b/src/libkeccak/digest.h
index fcd3d50..bbb4758 100644
--- a/src/libkeccak/digest.h
+++ b/src/libkeccak/digest.h
@@ -24,14 +24,15 @@
/**
- * Absorb the more of the message to the Keccak sponge
+ * Absorb more of the message to the Keccak sponge
*
- * @param state The hashing state
- * @param msg The partial message
- * @param msglen The length of the partial message
+ * @param state The hashing state
+ * @param msg The partial message
+ * @param msglen The length of the partial message
+ * @return Zero on success, -1 on error
*/
-__attribute__((nonnull(1)))
-void libkeccak_update(libkeccak_state_t* restrict state, const char* restrict msg, size_t msglen);
+__attribute__((nonnull))
+int libkeccak_update(libkeccak_state_t* restrict state, const char* restrict msg, size_t msglen);
/**
@@ -41,7 +42,7 @@ void libkeccak_update(libkeccak_state_t* restrict state, const char* restrict ms
* @param msg The rest of the message, may be `NULL`
* @param msglen The length of the partial message
* @param bits The number of bits at the end of the message not covered by `msglen`
- * @param suffix The suffix concatenate to the message
+ * @param suffix The suffix concatenate to the message, only '1':s and '0':s, and NUL-termination
* @param hashsum Output paramter for the hashsum, may be `NULL`
* @return Zero on success, -1 on error
*/
@@ -56,7 +57,7 @@ int libkeccak_digest(libkeccak_state_t* restrict state, const char* restrict msg
* @param state The hashing state
* @param times The number of rounds
*/
-__attribute__((nonnull, nothrow))
+inline __attribute__((nonnull, nothrow, artificial, gnu_inline))
void libkeccak_simple_squeeze(libkeccak_state_t* restrict state, long times);
@@ -66,7 +67,7 @@ void libkeccak_simple_squeeze(libkeccak_state_t* restrict state, long times);
* @param state The hashing state
* @param times The number of digests
*/
-__attribute__((nonnull, nothrow))
+inline __attribute__((nonnull, nothrow, artificial, gnu_inline))
void libkeccak_fast_squeeze(libkeccak_state_t* restrict state, long times);
diff --git a/src/libkeccak/state.h b/src/libkeccak/state.h
index 9d6be5c..0819b6a 100644
--- a/src/libkeccak/state.h
+++ b/src/libkeccak/state.h
@@ -37,6 +37,11 @@
typedef struct libkeccak_state
{
/**
+ * The lanes (state)
+ */
+ int_fast64_t S[25];
+
+ /**
* The bitrate
*/
long r;
@@ -77,11 +82,6 @@ typedef struct libkeccak_state
long nr;
/**
- * The lanes (state)
- */
- int_fast64_t S[25];
-
- /**
* Pointer for `M`
*/
size_t mptr;
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-11-22 20:02:10 +0000