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commit b492f6967e582ecd0da8eb9581baf4ec8af9c64f
Author: Vincent Torri <vincent.to...@gmail.com>
AuthorDate: Fri Mar 24 14:57:59 2023 +0000
eina - new sha1 checksumming function
This adds eina_sha1().
@feat
---
src/lib/eina/eina_sha.c | 122 +++++++++++++++++++++++++++++++++++++++++++++++
src/lib/eina/eina_sha.h | 38 +++++++++++++++
src/lib/eina/meson.build | 4 +-
3 files changed, 163 insertions(+), 1 deletion(-)
diff --git a/src/lib/eina/eina_sha.c b/src/lib/eina/eina_sha.c
new file mode 100644
index 0000000000..5606c58c25
--- /dev/null
+++ b/src/lib/eina/eina_sha.c
@@ -0,0 +1,122 @@
+/* EINA - EFL data type library
+ * Copyright (C) 2023 Carsten Haitzler
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library;
+ * if not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <string.h>
+
+#include "eina_private.h"
+#include "eina_sha.h"
+#include "eina_cpu.h"
+
+/*============================================================================*
+ * API *
+ *============================================================================*/
+
+
+EINA_API void
+eina_sha1(const unsigned char *data, int size, unsigned char dst[20])
+{
+#define SHSH(n, v) ((((v) << (n)) & 0xffffffff) | ((v) >> (32 - (n))))
+ unsigned int digest[5], word[80], wa, wb, wc, wd, we, t;
+ unsigned char buf[64];
+ const unsigned char *d;
+ int idx, left, i;
+ const unsigned int magic[4] =
+ {
+ 0x5a827999,
+ 0x6ed9eba1,
+ 0x8f1bbcdc,
+ 0xca62c1d6
+ };
+
+ idx = 0;
+ digest[0] = 0x67452301;
+ digest[1] = 0xefcdab89;
+ digest[2] = 0x98badcfe;
+ digest[3] = 0x10325476;
+ digest[4] = 0xc3d2e1f0;
+
+ memset(buf, 0, sizeof(buf));
+ for (left = size, d = data; left > 0; left--, d++)
+ {
+ if ((idx == 0) && (left < 64))
+ {
+ memset(buf, 0, 60);
+ buf[60] = (size >> 24) & 0xff;
+ buf[61] = (size >> 16) & 0xff;
+ buf[62] = (size >> 8) & 0xff;
+ buf[63] = (size) & 0xff;
+ }
+ buf[idx] = *d;
+ idx++;
+ if ((idx == 64) || (left == 1))
+ {
+ if ((left == 1) && (idx < 64)) buf[idx] = 0x80;
+ for (i = 0; i < 16; i++)
+ {
+ word[i] = (unsigned int)buf[(i * 4) ] << 24;
+ word[i] |= (unsigned int)buf[(i * 4) + 1] << 16;
+ word[i] |= (unsigned int)buf[(i * 4) + 2] << 8;
+ word[i] |= (unsigned int)buf[(i * 4) + 3];
+ }
+ for (i = 16; i < 80; i++)
+ word[i] = SHSH(1,
+ word[i - 3 ] ^ word[i - 8 ] ^
+ word[i - 14] ^ word[i - 16]);
+ wa = digest[0];
+ wb = digest[1];
+ wc = digest[2];
+ wd = digest[3];
+ we = digest[4];
+ for (i = 0; i < 80; i++)
+ {
+ if (i < 20)
+ t = SHSH(5, wa) + ((wb & wc) | ((~wb) & wd)) + we + word[i] + magic[0];
+ else if (i < 40)
+ t = SHSH(5, wa) + (wb ^ wc ^ wd) + we + word[i] + magic[1];
+ else if (i < 60)
+ t = SHSH(5, wa) + ((wb & wc) | (wb & wd) | (wc & wd)) + we + word[i] + magic[2];
+ else if (i < 80)
+ t = SHSH(5, wa) + (wb ^ wc ^ wd) + we + word[i] + magic[3];
+ we = wd;
+ wd = wc;
+ wc = SHSH(30, wb);
+ wb = wa;
+ wa = t;
+ }
+ digest[0] += wa;
+ digest[1] += wb;
+ digest[2] += wc;
+ digest[3] += wd;
+ digest[4] += we;
+ idx = 0;
+ }
+ }
+
+ t = eina_htonl(digest[0]); digest[0] = t;
+ t = eina_htonl(digest[1]); digest[1] = t;
+ t = eina_htonl(digest[2]); digest[2] = t;
+ t = eina_htonl(digest[3]); digest[3] = t;
+ t = eina_htonl(digest[4]); digest[4] = t;
+
+ memcpy(dst, digest, 5 * 4);
+}
diff --git a/src/lib/eina/eina_sha.h b/src/lib/eina/eina_sha.h
new file mode 100644
index 0000000000..24b0ee3b78
--- /dev/null
+++ b/src/lib/eina/eina_sha.h
@@ -0,0 +1,38 @@
+/* EINA - EFL data type library
+ * Copyright (C) 2023 Carsten Haitzler
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library;
+ * if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef EINA_SHA_H_
+#define EINA_SHA_H_
+
+/**
+ * @brief Calculate a SHA1 checksum of data
+ *
+ * This function calculates a SHA1 checksum of the binary data pointed to by
+ * @p data of size @p size in bytes and will fill 20 bytes pointed to by
+ * @p dst with the resulting 20 byte binary SHA1 sum.
+ *
+ * The input data should be a valid pointer to at least @p size bytes of data
+ * that will be summed. @p dst should also point to a buffer of at least 20
+ * bytes in size to store the checksum.
+ *
+ * @since 1.27
+ */
+EINA_API void eina_sha1(const unsigned char *data, int size, unsigned char dst[20]) EINA_ARG_NONNULL(1);
+
+
+#endif
diff --git a/src/lib/eina/meson.build b/src/lib/eina/meson.build
index f611bf4c5a..a8f9cf82b7 100644
--- a/src/lib/eina/meson.build
+++ b/src/lib/eina/meson.build
@@ -113,7 +113,8 @@ public_sub_headers = [
'eina_freeq.h',
'eina_slstr.h',
'eina_vpath.h',
-'eina_abstract_content.h'
+'eina_abstract_content.h',
+'eina_sha.h'
]
public_headers = [
@@ -197,6 +198,7 @@ eina_src = files([
'eina_vpath.c',
'eina_vpath_xdg.c',
'eina_abstract_content.c',
+'eina_sha.c',
]) + eina_mp_sources
if sys_windows == true
--
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