config/git: import suckless sbase

i currently use the output of sha512sum in several
places of xbmk, which is a bit unreliable in case
output changes.

other cases where i use util outputs in variables
are probably reliable, because i'm using mostly
posix utilities in those.

to mitigate this, i now import suckless sbase, which
has a reasonable sha512sum implementation.

*every* binary it builds is being placed in build.list,
because i'll probably start using more of them.

for example, i may start modifying the "date"
implementation, adding the GNU-specific options that
i need as mentioned on init.sh

i'm importing it in util/ because the sha512sum
util is needed for verifying project sources, so
if sbase itself is a "project source", that means
we can into a chicken and egg bootstrapping problem.

this is sbase at revision:
055cc1ae1b3a13c3d8f25af0a4a3316590efcd48

Signed-off-by: Leah Rowe <leah@libreboot.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/util/sbase/sha1.h b/util/sbase/sha1.h
new file mode 100644
index 00000000..86317770
--- /dev/null
+++ b/util/sbase/sha1.h
@@ -0,0 +1,18 @@
+/* public domain sha1 implementation based on rfc3174 and libtomcrypt */
+
+struct sha1 {
+	uint64_t len;    /* processed message length */
+	uint32_t h[5];   /* hash state */
+	uint8_t buf[64]; /* message block buffer */
+};
+
+enum { SHA1_DIGEST_LENGTH = 20 };
+
+/* reset state */
+void sha1_init(void *ctx);
+/* process message */
+void sha1_update(void *ctx, const void *m, unsigned long len);
+/* get message digest */
+/* state is ruined after sum, keep a copy if multiple sum is needed */
+/* part of the message might be left in s, zero it if secrecy is needed */
+void sha1_sum(void *ctx, uint8_t md[SHA1_DIGEST_LENGTH]);