[gentoo-commits] repo/proj/prefix:master commit in: scripts/rsync-generation/

[Fabian Groffen]

commit:     2ced4dd4b98a186dbcef48501bdcbde57ecb40c1
Author:     Fabian Groffen <grobian <AT> gentoo <DOT> org>
AuthorDate: Mon Nov 27 12:35:20 2017 +0000
Commit:     Fabian Groffen <grobian <AT> gentoo <DOT> org>
CommitDate: Mon Nov 27 12:35:20 2017 +0000
URL:        https://gitweb.gentoo.org/repo/proj/prefix.git/commit/?id=2ced4dd4

hashgen: phase 1, add BLAKE2B hashing

 scripts/rsync-generation/hashgen.c | 30 +++++++++++++++++++++++++-----
 1 file changed, 25 insertions(+), 5 deletions(-)

diff --git a/scripts/rsync-generation/hashgen.c 
b/scripts/rsync-generation/hashgen.c
index 6fc8e150d3..fed99a3132 100644
--- a/scripts/rsync-generation/hashgen.c
+++ b/scripts/rsync-generation/hashgen.c
@@ -1,4 +1,4 @@
-/* Copyright 2006-2015 Gentoo Foundation; Distributed under the GPL v2 */
+/* Copyright 2006-2017 Gentoo Foundation; Distributed under the GPL v2 */
 #include <stdio.h>
 #include <string.h>
 #include <strings.h>
@@ -9,9 +9,16 @@
 #include <sys/time.h>
 #include <openssl/sha.h>
 #include <openssl/whrlpool.h>
+#include <blake2.h>
 
 /* Generate thick Manifests based on thin Manifests */
-/* gcc -o hashgen -fopenmp -Wall -Werror -O3 -pipe -lssl -lcrypto hashgen.c */
+
+/* In order to build this program, the following packages are required:
+ * - app-crypt/libb2 (for BLAKE2, for as long as openssl doesn't include it)
+ * - dev-libs/openssl (for SHA, WHIRLPOOL)
+ * compile like this
+ *   ${CC} -o hashgen -fopenmp ${CFLAGS} -lssl -lcrypto -lb2 hashgen.c
+ */
 
 static inline void
 hex_hash(char *out, const unsigned char *buf, const int length)
@@ -31,11 +38,13 @@ write_hashes(const char *root, const char *name, const char 
*type, FILE *m)
        char sha256[(SHA256_DIGEST_LENGTH * 2) + 1];
        char sha512[(SHA512_DIGEST_LENGTH * 2) + 1];
        char whrlpl[(WHIRLPOOL_DIGEST_LENGTH * 2) + 1];
+       char blak2b[(BLAKE2B_OUTBYTES * 2) + 1];
        char data[8096];
        size_t len;
        SHA256_CTX s256;
        SHA512_CTX s512;
        WHIRLPOOL_CTX whrl;
+       blake2b_state bl2b;
 
        snprintf(fname, sizeof(fname), "%s/%s", root, name);
        if ((f = fopen(fname, "r")) == NULL)
@@ -44,6 +53,7 @@ write_hashes(const char *root, const char *name, const char 
*type, FILE *m)
        SHA256_Init(&s256);
        SHA512_Init(&s512);
        WHIRLPOOL_Init(&whrl);
+       blake2b_init(&bl2b, BLAKE2B_OUTBYTES);
 
        while ((len = fread(data, 1, sizeof(data), f)) > 0) {
                flen += len;
@@ -61,6 +71,10 @@ write_hashes(const char *root, const char *name, const char 
*type, FILE *m)
                        {
                                WHIRLPOOL_Update(&whrl, data, len);
                        }
+#pragma omp section
+                       {
+                               blake2b_update(&bl2b, data, len);
+                       }
                }
        }
 
@@ -83,11 +97,17 @@ write_hashes(const char *root, const char *name, const char 
*type, FILE *m)
                        WHIRLPOOL_Final(whrlplbuf, &whrl);
                        hex_hash(whrlpl, whrlplbuf, WHIRLPOOL_DIGEST_LENGTH);
                }
+#pragma omp section
+               {
+                       unsigned char blak2bbuf[BLAKE2B_OUTBYTES];
+                       blake2b_final(&bl2b, blak2bbuf, BLAKE2B_OUTBYTES);
+                       hex_hash(blak2b, blak2bbuf, WHIRLPOOL_DIGEST_LENGTH);
+               }
        }
        fclose(f);
 
-       fprintf(m, "%s %s %zd SHA256 %s SHA512 %s WHIRLPOOL %s\n",
-                       type, name, flen, sha256, sha512, whrlpl);
+       fprintf(m, "%s %s %zd SHA256 %s SHA512 %s WHIRLPOOL %s BLAKE2B %s\n",
+                       type, name, flen, sha256, sha512, whrlpl, blak2b);
 }
 
 static char
@@ -149,7 +169,7 @@ process_dir(const char *dir)
                struct timeval tv[2];
 
                /* set mtime of Manifest to the one of the parent dir, this way
-                * we enure the Manifest gets mtime bumped upon any change made
+                * we ensure the Manifest gets mtime bumped upon any change made
                 * to the directory, that is, a DIST change (Manifest itself) or
                 * any other change (ebuild, files, metadata) */
                if (stat(dir, &s)) {