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-rw-r--r--ipsec-tools/src/racoon/missing/crypto/rijndael/rijndael-alg-fst.c496
1 files changed, 496 insertions, 0 deletions
diff --git a/ipsec-tools/src/racoon/missing/crypto/rijndael/rijndael-alg-fst.c b/ipsec-tools/src/racoon/missing/crypto/rijndael/rijndael-alg-fst.c
new file mode 100644
index 00000000..7e48d44b
--- /dev/null
+++ b/ipsec-tools/src/racoon/missing/crypto/rijndael/rijndael-alg-fst.c
@@ -0,0 +1,496 @@
+/* $NetBSD: rijndael-alg-fst.c,v 1.4 2006/09/09 16:22:36 manu Exp $ */
+
+/* $KAME: rijndael-alg-fst.c,v 1.1.1.1 2001/08/08 09:56:23 sakane Exp $ */
+
+/*
+ * rijndael-alg-fst.c v2.3 April '2000
+ *
+ * Optimised ANSI C code
+ *
+ * authors: v1.0: Antoon Bosselaers
+ * v2.0: Vincent Rijmen
+ * v2.3: Paulo Barreto
+ *
+ * This code is placed in the public domain.
+ */
+
+#include "config.h"
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#ifdef _KERNEL
+#include <sys/systm.h>
+#else
+#include <string.h>
+#endif
+#include <crypto/rijndael/rijndael-alg-fst.h>
+#include <crypto/rijndael/rijndael_local.h>
+
+#include <crypto/rijndael/boxes-fst.dat>
+
+#include <err.h>
+#define bcopy(a, b, c) memcpy((b), (a), (c))
+#define bzero(a, b) memset((a), 0, (b))
+#define panic(a) err(1, (a))
+
+int rijndaelKeySched(word8 k[MAXKC][4], word8 W[MAXROUNDS+1][4][4], int ROUNDS) {
+ /* Calculate the necessary round keys
+ * The number of calculations depends on keyBits and blockBits
+ */
+ int j, r, t, rconpointer = 0;
+ union {
+ word8 x8[MAXKC][4];
+ word32 x32[MAXKC];
+ } xtk;
+#define tk xtk.x8
+ int KC = ROUNDS - 6;
+
+ for (j = KC-1; j >= 0; j--) {
+ *((word32*)tk[j]) = *((word32*)k[j]);
+ }
+ r = 0;
+ t = 0;
+ /* copy values into round key array */
+ for (j = 0; (j < KC) && (r < ROUNDS + 1); ) {
+ for (; (j < KC) && (t < 4); j++, t++) {
+ *((word32*)W[r][t]) = *((word32*)tk[j]);
+ }
+ if (t == 4) {
+ r++;
+ t = 0;
+ }
+ }
+
+ while (r < ROUNDS + 1) { /* while not enough round key material calculated */
+ /* calculate new values */
+ tk[0][0] ^= S[tk[KC-1][1]];
+ tk[0][1] ^= S[tk[KC-1][2]];
+ tk[0][2] ^= S[tk[KC-1][3]];
+ tk[0][3] ^= S[tk[KC-1][0]];
+ tk[0][0] ^= rcon[rconpointer++];
+
+ if (KC != 8) {
+ for (j = 1; j < KC; j++) {
+ *((word32*)tk[j]) ^= *((word32*)tk[j-1]);
+ }
+ } else {
+ for (j = 1; j < KC/2; j++) {
+ *((word32*)tk[j]) ^= *((word32*)tk[j-1]);
+ }
+ tk[KC/2][0] ^= S[tk[KC/2 - 1][0]];
+ tk[KC/2][1] ^= S[tk[KC/2 - 1][1]];
+ tk[KC/2][2] ^= S[tk[KC/2 - 1][2]];
+ tk[KC/2][3] ^= S[tk[KC/2 - 1][3]];
+ for (j = KC/2 + 1; j < KC; j++) {
+ *((word32*)tk[j]) ^= *((word32*)tk[j-1]);
+ }
+ }
+ /* copy values into round key array */
+ for (j = 0; (j < KC) && (r < ROUNDS + 1); ) {
+ for (; (j < KC) && (t < 4); j++, t++) {
+ *((word32*)W[r][t]) = *((word32*)tk[j]);
+ }
+ if (t == 4) {
+ r++;
+ t = 0;
+ }
+ }
+ }
+ return 0;
+#undef tk
+}
+
+int rijndaelKeyEncToDec(word8 W[MAXROUNDS+1][4][4], int ROUNDS) {
+ int r;
+ word8 *w;
+
+ for (r = 1; r < ROUNDS; r++) {
+ w = W[r][0];
+ *((word32*)w) =
+ *((const word32*)U1[w[0]])
+ ^ *((const word32*)U2[w[1]])
+ ^ *((const word32*)U3[w[2]])
+ ^ *((const word32*)U4[w[3]]);
+
+ w = W[r][1];
+ *((word32*)w) =
+ *((const word32*)U1[w[0]])
+ ^ *((const word32*)U2[w[1]])
+ ^ *((const word32*)U3[w[2]])
+ ^ *((const word32*)U4[w[3]]);
+
+ w = W[r][2];
+ *((word32*)w) =
+ *((const word32*)U1[w[0]])
+ ^ *((const word32*)U2[w[1]])
+ ^ *((const word32*)U3[w[2]])
+ ^ *((const word32*)U4[w[3]]);
+
+ w = W[r][3];
+ *((word32*)w) =
+ *((const word32*)U1[w[0]])
+ ^ *((const word32*)U2[w[1]])
+ ^ *((const word32*)U3[w[2]])
+ ^ *((const word32*)U4[w[3]]);
+ }
+ return 0;
+}
+
+/**
+ * Encrypt a single block.
+ */
+int rijndaelEncrypt(word8 in[16], word8 out[16], word8 rk[MAXROUNDS+1][4][4], int ROUNDS) {
+ int r;
+ union {
+ word8 x8[16];
+ word32 x32[4];
+ } xa, xb;
+#define a xa.x8
+#define b xb.x8
+ union {
+ word8 x8[4][4];
+ word32 x32[4];
+ } xtemp;
+#define temp xtemp.x8
+
+ memcpy(a, in, sizeof a);
+
+ *((word32*)temp[0]) = *((word32*)(a )) ^ *((word32*)rk[0][0]);
+ *((word32*)temp[1]) = *((word32*)(a+ 4)) ^ *((word32*)rk[0][1]);
+ *((word32*)temp[2]) = *((word32*)(a+ 8)) ^ *((word32*)rk[0][2]);
+ *((word32*)temp[3]) = *((word32*)(a+12)) ^ *((word32*)rk[0][3]);
+ *((word32*)(b )) = *((const word32*)T1[temp[0][0]])
+ ^ *((const word32*)T2[temp[1][1]])
+ ^ *((const word32*)T3[temp[2][2]])
+ ^ *((const word32*)T4[temp[3][3]]);
+ *((word32*)(b + 4)) = *((const word32*)T1[temp[1][0]])
+ ^ *((const word32*)T2[temp[2][1]])
+ ^ *((const word32*)T3[temp[3][2]])
+ ^ *((const word32*)T4[temp[0][3]]);
+ *((word32*)(b + 8)) = *((const word32*)T1[temp[2][0]])
+ ^ *((const word32*)T2[temp[3][1]])
+ ^ *((const word32*)T3[temp[0][2]])
+ ^ *((const word32*)T4[temp[1][3]]);
+ *((word32*)(b +12)) = *((const word32*)T1[temp[3][0]])
+ ^ *((const word32*)T2[temp[0][1]])
+ ^ *((const word32*)T3[temp[1][2]])
+ ^ *((const word32*)T4[temp[2][3]]);
+ for (r = 1; r < ROUNDS-1; r++) {
+ *((word32*)temp[0]) = *((word32*)(b )) ^ *((word32*)rk[r][0]);
+ *((word32*)temp[1]) = *((word32*)(b+ 4)) ^ *((word32*)rk[r][1]);
+ *((word32*)temp[2]) = *((word32*)(b+ 8)) ^ *((word32*)rk[r][2]);
+ *((word32*)temp[3]) = *((word32*)(b+12)) ^ *((word32*)rk[r][3]);
+
+ *((word32*)(b )) = *((const word32*)T1[temp[0][0]])
+ ^ *((const word32*)T2[temp[1][1]])
+ ^ *((const word32*)T3[temp[2][2]])
+ ^ *((const word32*)T4[temp[3][3]]);
+ *((word32*)(b + 4)) = *((const word32*)T1[temp[1][0]])
+ ^ *((const word32*)T2[temp[2][1]])
+ ^ *((const word32*)T3[temp[3][2]])
+ ^ *((const word32*)T4[temp[0][3]]);
+ *((word32*)(b + 8)) = *((const word32*)T1[temp[2][0]])
+ ^ *((const word32*)T2[temp[3][1]])
+ ^ *((const word32*)T3[temp[0][2]])
+ ^ *((const word32*)T4[temp[1][3]]);
+ *((word32*)(b +12)) = *((const word32*)T1[temp[3][0]])
+ ^ *((const word32*)T2[temp[0][1]])
+ ^ *((const word32*)T3[temp[1][2]])
+ ^ *((const word32*)T4[temp[2][3]]);
+ }
+ /* last round is special */
+ *((word32*)temp[0]) = *((word32*)(b )) ^ *((word32*)rk[ROUNDS-1][0]);
+ *((word32*)temp[1]) = *((word32*)(b+ 4)) ^ *((word32*)rk[ROUNDS-1][1]);
+ *((word32*)temp[2]) = *((word32*)(b+ 8)) ^ *((word32*)rk[ROUNDS-1][2]);
+ *((word32*)temp[3]) = *((word32*)(b+12)) ^ *((word32*)rk[ROUNDS-1][3]);
+ b[ 0] = T1[temp[0][0]][1];
+ b[ 1] = T1[temp[1][1]][1];
+ b[ 2] = T1[temp[2][2]][1];
+ b[ 3] = T1[temp[3][3]][1];
+ b[ 4] = T1[temp[1][0]][1];
+ b[ 5] = T1[temp[2][1]][1];
+ b[ 6] = T1[temp[3][2]][1];
+ b[ 7] = T1[temp[0][3]][1];
+ b[ 8] = T1[temp[2][0]][1];
+ b[ 9] = T1[temp[3][1]][1];
+ b[10] = T1[temp[0][2]][1];
+ b[11] = T1[temp[1][3]][1];
+ b[12] = T1[temp[3][0]][1];
+ b[13] = T1[temp[0][1]][1];
+ b[14] = T1[temp[1][2]][1];
+ b[15] = T1[temp[2][3]][1];
+ *((word32*)(b )) ^= *((word32*)rk[ROUNDS][0]);
+ *((word32*)(b+ 4)) ^= *((word32*)rk[ROUNDS][1]);
+ *((word32*)(b+ 8)) ^= *((word32*)rk[ROUNDS][2]);
+ *((word32*)(b+12)) ^= *((word32*)rk[ROUNDS][3]);
+
+ memcpy(out, b, sizeof b /* XXX out */);
+
+ return 0;
+#undef a
+#undef b
+#undef temp
+}
+
+#ifdef INTERMEDIATE_VALUE_KAT
+/**
+ * Encrypt only a certain number of rounds.
+ * Only used in the Intermediate Value Known Answer Test.
+ */
+int rijndaelEncryptRound(word8 a[4][4], word8 rk[MAXROUNDS+1][4][4], int ROUNDS, int rounds) {
+ int r;
+ word8 temp[4][4];
+
+ /* make number of rounds sane */
+ if (rounds > ROUNDS) {
+ rounds = ROUNDS;
+ }
+
+ *((word32*)a[0]) = *((word32*)a[0]) ^ *((word32*)rk[0][0]);
+ *((word32*)a[1]) = *((word32*)a[1]) ^ *((word32*)rk[0][1]);
+ *((word32*)a[2]) = *((word32*)a[2]) ^ *((word32*)rk[0][2]);
+ *((word32*)a[3]) = *((word32*)a[3]) ^ *((word32*)rk[0][3]);
+
+ for (r = 1; (r <= rounds) && (r < ROUNDS); r++) {
+ *((word32*)temp[0]) = *((const word32*)T1[a[0][0]])
+ ^ *((const word32*)T2[a[1][1]])
+ ^ *((const word32*)T3[a[2][2]])
+ ^ *((const word32*)T4[a[3][3]]);
+ *((word32*)temp[1]) = *((const word32*)T1[a[1][0]])
+ ^ *((const word32*)T2[a[2][1]])
+ ^ *((const word32*)T3[a[3][2]])
+ ^ *((const word32*)T4[a[0][3]]);
+ *((word32*)temp[2]) = *((const word32*)T1[a[2][0]])
+ ^ *((const word32*)T2[a[3][1]])
+ ^ *((const word32*)T3[a[0][2]])
+ ^ *((const word32*)T4[a[1][3]]);
+ *((word32*)temp[3]) = *((const word32*)T1[a[3][0]])
+ ^ *((const word32*)T2[a[0][1]])
+ ^ *((const word32*)T3[a[1][2]])
+ ^ *((const word32*)T4[a[2][3]]);
+ *((word32*)a[0]) = *((word32*)temp[0]) ^ *((word32*)rk[r][0]);
+ *((word32*)a[1]) = *((word32*)temp[1]) ^ *((word32*)rk[r][1]);
+ *((word32*)a[2]) = *((word32*)temp[2]) ^ *((word32*)rk[r][2]);
+ *((word32*)a[3]) = *((word32*)temp[3]) ^ *((word32*)rk[r][3]);
+ }
+ if (rounds == ROUNDS) {
+ /* last round is special */
+ temp[0][0] = T1[a[0][0]][1];
+ temp[0][1] = T1[a[1][1]][1];
+ temp[0][2] = T1[a[2][2]][1];
+ temp[0][3] = T1[a[3][3]][1];
+ temp[1][0] = T1[a[1][0]][1];
+ temp[1][1] = T1[a[2][1]][1];
+ temp[1][2] = T1[a[3][2]][1];
+ temp[1][3] = T1[a[0][3]][1];
+ temp[2][0] = T1[a[2][0]][1];
+ temp[2][1] = T1[a[3][1]][1];
+ temp[2][2] = T1[a[0][2]][1];
+ temp[2][3] = T1[a[1][3]][1];
+ temp[3][0] = T1[a[3][0]][1];
+ temp[3][1] = T1[a[0][1]][1];
+ temp[3][2] = T1[a[1][2]][1];
+ temp[3][3] = T1[a[2][3]][1];
+ *((word32*)a[0]) = *((word32*)temp[0]) ^ *((word32*)rk[ROUNDS][0]);
+ *((word32*)a[1]) = *((word32*)temp[1]) ^ *((word32*)rk[ROUNDS][1]);
+ *((word32*)a[2]) = *((word32*)temp[2]) ^ *((word32*)rk[ROUNDS][2]);
+ *((word32*)a[3]) = *((word32*)temp[3]) ^ *((word32*)rk[ROUNDS][3]);
+ }
+
+ return 0;
+}
+#endif /* INTERMEDIATE_VALUE_KAT */
+
+/**
+ * Decrypt a single block.
+ */
+int rijndaelDecrypt(word8 in[16], word8 out[16], word8 rk[MAXROUNDS+1][4][4], int ROUNDS) {
+ int r;
+ union {
+ word8 x8[16];
+ word32 x32[4];
+ } xa, xb;
+#define a xa.x8
+#define b xb.x8
+ union {
+ word8 x8[4][4];
+ word32 x32[4];
+ } xtemp;
+#define temp xtemp.x8
+
+ memcpy(a, in, sizeof a);
+
+ *((word32*)temp[0]) = *((word32*)(a )) ^ *((word32*)rk[ROUNDS][0]);
+ *((word32*)temp[1]) = *((word32*)(a+ 4)) ^ *((word32*)rk[ROUNDS][1]);
+ *((word32*)temp[2]) = *((word32*)(a+ 8)) ^ *((word32*)rk[ROUNDS][2]);
+ *((word32*)temp[3]) = *((word32*)(a+12)) ^ *((word32*)rk[ROUNDS][3]);
+
+ *((word32*)(b )) = *((const word32*)T5[temp[0][0]])
+ ^ *((const word32*)T6[temp[3][1]])
+ ^ *((const word32*)T7[temp[2][2]])
+ ^ *((const word32*)T8[temp[1][3]]);
+ *((word32*)(b+ 4)) = *((const word32*)T5[temp[1][0]])
+ ^ *((const word32*)T6[temp[0][1]])
+ ^ *((const word32*)T7[temp[3][2]])
+ ^ *((const word32*)T8[temp[2][3]]);
+ *((word32*)(b+ 8)) = *((const word32*)T5[temp[2][0]])
+ ^ *((const word32*)T6[temp[1][1]])
+ ^ *((const word32*)T7[temp[0][2]])
+ ^ *((const word32*)T8[temp[3][3]]);
+ *((word32*)(b+12)) = *((const word32*)T5[temp[3][0]])
+ ^ *((const word32*)T6[temp[2][1]])
+ ^ *((const word32*)T7[temp[1][2]])
+ ^ *((const word32*)T8[temp[0][3]]);
+ for (r = ROUNDS-1; r > 1; r--) {
+ *((word32*)temp[0]) = *((word32*)(b )) ^ *((word32*)rk[r][0]);
+ *((word32*)temp[1]) = *((word32*)(b+ 4)) ^ *((word32*)rk[r][1]);
+ *((word32*)temp[2]) = *((word32*)(b+ 8)) ^ *((word32*)rk[r][2]);
+ *((word32*)temp[3]) = *((word32*)(b+12)) ^ *((word32*)rk[r][3]);
+ *((word32*)(b )) = *((const word32*)T5[temp[0][0]])
+ ^ *((const word32*)T6[temp[3][1]])
+ ^ *((const word32*)T7[temp[2][2]])
+ ^ *((const word32*)T8[temp[1][3]]);
+ *((word32*)(b+ 4)) = *((const word32*)T5[temp[1][0]])
+ ^ *((const word32*)T6[temp[0][1]])
+ ^ *((const word32*)T7[temp[3][2]])
+ ^ *((const word32*)T8[temp[2][3]]);
+ *((word32*)(b+ 8)) = *((const word32*)T5[temp[2][0]])
+ ^ *((const word32*)T6[temp[1][1]])
+ ^ *((const word32*)T7[temp[0][2]])
+ ^ *((const word32*)T8[temp[3][3]]);
+ *((word32*)(b+12)) = *((const word32*)T5[temp[3][0]])
+ ^ *((const word32*)T6[temp[2][1]])
+ ^ *((const word32*)T7[temp[1][2]])
+ ^ *((const word32*)T8[temp[0][3]]);
+ }
+ /* last round is special */
+ *((word32*)temp[0]) = *((word32*)(b )) ^ *((word32*)rk[1][0]);
+ *((word32*)temp[1]) = *((word32*)(b+ 4)) ^ *((word32*)rk[1][1]);
+ *((word32*)temp[2]) = *((word32*)(b+ 8)) ^ *((word32*)rk[1][2]);
+ *((word32*)temp[3]) = *((word32*)(b+12)) ^ *((word32*)rk[1][3]);
+ b[ 0] = S5[temp[0][0]];
+ b[ 1] = S5[temp[3][1]];
+ b[ 2] = S5[temp[2][2]];
+ b[ 3] = S5[temp[1][3]];
+ b[ 4] = S5[temp[1][0]];
+ b[ 5] = S5[temp[0][1]];
+ b[ 6] = S5[temp[3][2]];
+ b[ 7] = S5[temp[2][3]];
+ b[ 8] = S5[temp[2][0]];
+ b[ 9] = S5[temp[1][1]];
+ b[10] = S5[temp[0][2]];
+ b[11] = S5[temp[3][3]];
+ b[12] = S5[temp[3][0]];
+ b[13] = S5[temp[2][1]];
+ b[14] = S5[temp[1][2]];
+ b[15] = S5[temp[0][3]];
+ *((word32*)(b )) ^= *((word32*)rk[0][0]);
+ *((word32*)(b+ 4)) ^= *((word32*)rk[0][1]);
+ *((word32*)(b+ 8)) ^= *((word32*)rk[0][2]);
+ *((word32*)(b+12)) ^= *((word32*)rk[0][3]);
+
+ memcpy(out, b, sizeof b /* XXX out */);
+
+ return 0;
+#undef a
+#undef b
+#undef temp
+}
+
+
+#ifdef INTERMEDIATE_VALUE_KAT
+/**
+ * Decrypt only a certain number of rounds.
+ * Only used in the Intermediate Value Known Answer Test.
+ * Operations rearranged such that the intermediate values
+ * of decryption correspond with the intermediate values
+ * of encryption.
+ */
+int rijndaelDecryptRound(word8 a[4][4], word8 rk[MAXROUNDS+1][4][4], int ROUNDS, int rounds) {
+ int r, i;
+ word8 temp[4], shift;
+
+ /* make number of rounds sane */
+ if (rounds > ROUNDS) {
+ rounds = ROUNDS;
+ }
+ /* first round is special: */
+ *(word32 *)a[0] ^= *(word32 *)rk[ROUNDS][0];
+ *(word32 *)a[1] ^= *(word32 *)rk[ROUNDS][1];
+ *(word32 *)a[2] ^= *(word32 *)rk[ROUNDS][2];
+ *(word32 *)a[3] ^= *(word32 *)rk[ROUNDS][3];
+ for (i = 0; i < 4; i++) {
+ a[i][0] = Si[a[i][0]];
+ a[i][1] = Si[a[i][1]];
+ a[i][2] = Si[a[i][2]];
+ a[i][3] = Si[a[i][3]];
+ }
+ for (i = 1; i < 4; i++) {
+ shift = (4 - i) & 3;
+ temp[0] = a[(0 + shift) & 3][i];
+ temp[1] = a[(1 + shift) & 3][i];
+ temp[2] = a[(2 + shift) & 3][i];
+ temp[3] = a[(3 + shift) & 3][i];
+ a[0][i] = temp[0];
+ a[1][i] = temp[1];
+ a[2][i] = temp[2];
+ a[3][i] = temp[3];
+ }
+ /* ROUNDS-1 ordinary rounds */
+ for (r = ROUNDS-1; r > rounds; r--) {
+ *(word32 *)a[0] ^= *(word32 *)rk[r][0];
+ *(word32 *)a[1] ^= *(word32 *)rk[r][1];
+ *(word32 *)a[2] ^= *(word32 *)rk[r][2];
+ *(word32 *)a[3] ^= *(word32 *)rk[r][3];
+
+ *((word32*)a[0]) =
+ *((const word32*)U1[a[0][0]])
+ ^ *((const word32*)U2[a[0][1]])
+ ^ *((const word32*)U3[a[0][2]])
+ ^ *((const word32*)U4[a[0][3]]);
+
+ *((word32*)a[1]) =
+ *((const word32*)U1[a[1][0]])
+ ^ *((const word32*)U2[a[1][1]])
+ ^ *((const word32*)U3[a[1][2]])
+ ^ *((const word32*)U4[a[1][3]]);
+
+ *((word32*)a[2]) =
+ *((const word32*)U1[a[2][0]])
+ ^ *((const word32*)U2[a[2][1]])
+ ^ *((const word32*)U3[a[2][2]])
+ ^ *((const word32*)U4[a[2][3]]);
+
+ *((word32*)a[3]) =
+ *((const word32*)U1[a[3][0]])
+ ^ *((const word32*)U2[a[3][1]])
+ ^ *((const word32*)U3[a[3][2]])
+ ^ *((const word32*)U4[a[3][3]]);
+ for (i = 0; i < 4; i++) {
+ a[i][0] = Si[a[i][0]];
+ a[i][1] = Si[a[i][1]];
+ a[i][2] = Si[a[i][2]];
+ a[i][3] = Si[a[i][3]];
+ }
+ for (i = 1; i < 4; i++) {
+ shift = (4 - i) & 3;
+ temp[0] = a[(0 + shift) & 3][i];
+ temp[1] = a[(1 + shift) & 3][i];
+ temp[2] = a[(2 + shift) & 3][i];
+ temp[3] = a[(3 + shift) & 3][i];
+ a[0][i] = temp[0];
+ a[1][i] = temp[1];
+ a[2][i] = temp[2];
+ a[3][i] = temp[3];
+ }
+ }
+ if (rounds == 0) {
+ /* End with the extra key addition */
+ *(word32 *)a[0] ^= *(word32 *)rk[0][0];
+ *(word32 *)a[1] ^= *(word32 *)rk[0][1];
+ *(word32 *)a[2] ^= *(word32 *)rk[0][2];
+ *(word32 *)a[3] ^= *(word32 *)rk[0][3];
+ }
+ return 0;
+}
+#endif /* INTERMEDIATE_VALUE_KAT */
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-03 20:19:53 +0000