From e17f71f9f01a429664caf120d9ac159ed9f5283f Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Fri, 27 Mar 2015 13:28:03 +0000
Subject:  - added sha512 (buggy, need to commit to test somewhere else)  -
 version bump (not a rc yet)  - bugfix: buffer_get returned -1 EPIPE on short
 reads w/o EOF

---
 doc/index.html                      |  2 +-
 doc/libstdcrypto/index.html         | 20 ++++++++
 doc/upgrade.html                    |  6 +++
 package/deps.mak                    |  8 +++-
 package/info                        |  2 +-
 src/include/skalibs/sha512.h        | 21 +++++++++
 src/include/skalibs/stdcrypto.h     |  1 +
 src/libstdcrypto/INCLUDE            |  5 --
 src/libstdcrypto/Makefile           |  7 ---
 src/libstdcrypto/sha512-internal.h  | 10 ++++
 src/libstdcrypto/sha512_final.c     | 25 ++++++++++
 src/libstdcrypto/sha512_init.c      |  9 ++++
 src/libstdcrypto/sha512_transform.c | 93 +++++++++++++++++++++++++++++++++++++
 src/libstdcrypto/sha512_update.c    | 24 ++++++++++
 src/libstddjb/buffer_get.c          |  2 +-
 15 files changed, 219 insertions(+), 16 deletions(-)
 create mode 100644 src/include/skalibs/sha512.h
 delete mode 100644 src/libstdcrypto/INCLUDE
 delete mode 100644 src/libstdcrypto/Makefile
 create mode 100644 src/libstdcrypto/sha512-internal.h
 create mode 100644 src/libstdcrypto/sha512_final.c
 create mode 100644 src/libstdcrypto/sha512_init.c
 create mode 100644 src/libstdcrypto/sha512_transform.c
 create mode 100644 src/libstdcrypto/sha512_update.c

diff --git a/doc/index.html b/doc/index.html
index f5cca8c..0628eba 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -59,7 +59,7 @@ with a standard C development environment </li>
 <h3> Download </h3>
 
 <ul>
- <li> The current released version of skalibs is <a href="skalibs-2.3.2.0.tar.gz">2.3.2.0</a>. </li>
+ <li> The current released version of skalibs is <a href="skalibs-2.3.3.0.tar.gz">2.3.3.0</a>. </li>
  <li> Alternatively, you can checkout a copy of the skalibs git repository:
 <pre> git clone git://git.skarnet.org/skalibs </pre> </li>
 </ul>
diff --git a/doc/libstdcrypto/index.html b/doc/libstdcrypto/index.html
index 02b06cb..4b17cbc 100644
--- a/doc/libstdcrypto/index.html
+++ b/doc/libstdcrypto/index.html
@@ -29,6 +29,7 @@ operations are provided:
   <li> md5 </li>
   <li> sha1 </li>
   <li> sha256 </li>
+  <li> sha512 </li>
 </ul>
 
 <h2> Compiling </h2>
@@ -127,6 +128,25 @@ SHA256 </h3>
   <li> <tt>sha256_final()</tt> computes the digest </li>
 </ul>
 
+<h3> <a name="sha512"></a>
+SHA512 </h3>
+
+<pre>
+  SHA512Schedule ctx ;
+  char const *message ;
+  unsigned int messagelen ;
+  char digest[64] ;
+
+  sha512_init(&amp;ctx) ;
+  sha512_update(&amp;ctx, message, messagelen) ;
+  sha512_final(&amp;ctx, digest) ;
+</pre>
+
+<ul>
+  <li> <tt>sha512_init()</tt> prepares a SHA512Schedule structure for computation </li>
+  <li> <tt>sha512_update()</tt> adds <em>message</em> to the message to be digested </li>
+  <li> <tt>sha512_final()</tt> computes the digest </li>
+</ul>
 
 </body>
 </html>
diff --git a/doc/upgrade.html b/doc/upgrade.html
index 7e2b687..7736c88 100644
--- a/doc/upgrade.html
+++ b/doc/upgrade.html
@@ -17,6 +17,12 @@
 
 <h1> What has changed in skalibs </h1>
 
+<h2> in 2.3.3.0 </h2>
+
+<ul>
+ <li> New sha512 functions, see <tt>skalibs/sha512.h</tt> </li>
+</ul>
+
 <h2> in 2.3.2.0 </h2>
 
 <ul>
diff --git a/package/deps.mak b/package/deps.mak
index 7f57b7c..2d06861 100644
--- a/package/deps.mak
+++ b/package/deps.mak
@@ -37,13 +37,14 @@ src/include/skalibs/random.h: src/include/skalibs/gccattributes.h src/include/sk
 src/include/skalibs/rrandom.h: src/include/skalibs/unirandom.h
 src/include/skalibs/sha1.h: src/include/skalibs/uint32.h
 src/include/skalibs/sha256.h: src/include/skalibs/uint32.h
+src/include/skalibs/sha512.h: src/include/skalibs/uint64.h
 src/include/skalibs/sig.h: src/include/skalibs/gccattributes.h
 src/include/skalibs/siovec.h: src/include/skalibs/gccattributes.h
 src/include/skalibs/skaclient.h: src/include/skalibs/kolbak.h src/include/skalibs/siovec.h src/include/skalibs/tai.h src/include/skalibs/uint32.h src/include/skalibs/unixmessage.h
 src/include/skalibs/skalibs.h: src/include/skalibs/biguint.h src/include/skalibs/datastruct.h src/include/skalibs/random.h src/include/skalibs/stdcrypto.h src/include/skalibs/stddjb.h src/include/skalibs/unixonacid.h
 src/include/skalibs/skamisc.h: src/include/skalibs/buffer.h src/include/skalibs/stralloc.h
 src/include/skalibs/socket.h: src/include/skalibs/djbunix.h src/include/skalibs/gccattributes.h src/include/skalibs/tai.h src/include/skalibs/uint16.h src/include/skalibs/uint32.h src/include/skalibs/webipc.h
-src/include/skalibs/stdcrypto.h: src/include/skalibs/md5.h src/include/skalibs/rc4.h src/include/skalibs/sha1.h src/include/skalibs/sha256.h
+src/include/skalibs/stdcrypto.h: src/include/skalibs/md5.h src/include/skalibs/rc4.h src/include/skalibs/sha1.h src/include/skalibs/sha256.h src/include/skalibs/sha512.h
 src/include/skalibs/stddjb.h: src/include/skalibs/alloc.h src/include/skalibs/allreadwrite.h src/include/skalibs/bitarray.h src/include/skalibs/bufalloc.h src/include/skalibs/buffer.h src/include/skalibs/bytestr.h src/include/skalibs/cbuffer.h src/include/skalibs/cdb.h src/include/skalibs/cdb_make.h src/include/skalibs/config.h src/include/skalibs/direntry.h src/include/skalibs/diuint.h src/include/skalibs/diuint32.h src/include/skalibs/djbtime.h src/include/skalibs/djbunix.h src/include/skalibs/env.h src/include/skalibs/envalloc.h src/include/skalibs/environ.h src/include/skalibs/error.h src/include/skalibs/fmtscan.h src/include/skalibs/functypes.h src/include/skalibs/gccattributes.h src/include/skalibs/genalloc.h src/include/skalibs/genwrite.h src/include/skalibs/getpeereid.h src/include/skalibs/gidstuff.h src/include/skalibs/iobuffer.h src/include/skalibs/iopause.h src/include/skalibs/ip46.h src/include/skalibs/lolstdio.h src/include/skalibs/mininetstring.h src/include/skalibs/netstring.h src/include/skalibs/nsig.h src/include/skalibs/segfault.h src/include/skalibs/selfpipe.h src/include/skalibs/setgroups.h src/include/skalibs/sgetopt.h src/include/skalibs/sig.h src/include/skalibs/siovec.h src/include/skalibs/skamisc.h src/include/skalibs/socket.h src/include/skalibs/stralloc.h src/include/skalibs/strerr.h src/include/skalibs/strerr2.h src/include/skalibs/tai.h src/include/skalibs/uint.h src/include/skalibs/uint16.h src/include/skalibs/uint32.h src/include/skalibs/uint64.h src/include/skalibs/ulong.h src/include/skalibs/ushort.h src/include/skalibs/webipc.h
 src/include/skalibs/stralloc.h: src/include/skalibs/bytestr.h src/include/skalibs/siovec.h
 src/include/skalibs/strerr.h: src/include/skalibs/gccattributes.h
@@ -65,6 +66,7 @@ src/librandom/random-internal.h: src/include/skalibs/gccattributes.h src/include
 src/libstdcrypto/md5-internal.h: src/include/skalibs/md5.h src/include/skalibs/uint32.h
 src/libstdcrypto/sha1-internal.h: src/include/skalibs/sha1.h src/include/skalibs/uint32.h
 src/libstdcrypto/sha256-internal.h: src/include/skalibs/sha256.h src/include/skalibs/uint32.h
+src/libstdcrypto/sha512-internal.h: src/include/skalibs/sha512.h
 src/libstddjb/alloc-internal.h: src/include/skalibs/alloc.h src/include/skalibs/sysdeps.h
 src/libstddjb/djbtime-internal.h: src/include/skalibs/config.h src/include/skalibs/uint64.h
 src/libstddjb/fmtscan-internal.h: src/include/skalibs/bytestr.h src/include/skalibs/fmtscan.h
@@ -189,6 +191,10 @@ src/libstdcrypto/sha256_final.o src/libstdcrypto/sha256_final.lo: src/libstdcryp
 src/libstdcrypto/sha256_init.o src/libstdcrypto/sha256_init.lo: src/libstdcrypto/sha256_init.c src/include/skalibs/sha256.h
 src/libstdcrypto/sha256_transform.o src/libstdcrypto/sha256_transform.lo: src/libstdcrypto/sha256_transform.c src/libstdcrypto/sha256-internal.h src/include/skalibs/uint32.h
 src/libstdcrypto/sha256_update.o src/libstdcrypto/sha256_update.lo: src/libstdcrypto/sha256_update.c src/libstdcrypto/sha256-internal.h src/include/skalibs/sha256.h
+src/libstdcrypto/sha512_final.o src/libstdcrypto/sha512_final.lo: src/libstdcrypto/sha512_final.c src/include/skalibs/bytestr.h src/libstdcrypto/sha512-internal.h src/include/skalibs/sha512.h src/include/skalibs/uint64.h
+src/libstdcrypto/sha512_init.o src/libstdcrypto/sha512_init.lo: src/libstdcrypto/sha512_init.c src/include/skalibs/sha512.h
+src/libstdcrypto/sha512_transform.o src/libstdcrypto/sha512_transform.lo: src/libstdcrypto/sha512_transform.c src/libstdcrypto/sha512-internal.h src/include/skalibs/sha512.h src/include/skalibs/uint64.h
+src/libstdcrypto/sha512_update.o src/libstdcrypto/sha512_update.lo: src/libstdcrypto/sha512_update.c src/include/skalibs/bytestr.h src/libstdcrypto/sha512-internal.h src/include/skalibs/sha512.h
 src/libstddjb/absolutepath.o src/libstddjb/absolutepath.lo: src/libstddjb/absolutepath.c src/include/skalibs/djbunix.h src/include/skalibs/skamisc.h src/include/skalibs/stralloc.h
 src/libstddjb/absolutepath_tmp.o src/libstddjb/absolutepath_tmp.lo: src/libstddjb/absolutepath_tmp.c src/include/skalibs/bytestr.h src/include/skalibs/djbunix.h src/include/skalibs/stralloc.h
 src/libstddjb/alloc.o src/libstddjb/alloc.lo: src/libstddjb/alloc.c src/libstddjb/alloc-internal.h src/include/skalibs/alloc.h src/include/skalibs/sysdeps.h
diff --git a/package/info b/package/info
index 9f57833..d53131d 100644
--- a/package/info
+++ b/package/info
@@ -1,4 +1,4 @@
 package=skalibs
-version=2.3.2.0
+version=2.3.3.0
 category=prog
 package_macro_name=SKALIBS
diff --git a/src/include/skalibs/sha512.h b/src/include/skalibs/sha512.h
new file mode 100644
index 0000000..eddb4ed
--- /dev/null
+++ b/src/include/skalibs/sha512.h
@@ -0,0 +1,21 @@
+/* ISC license. */
+
+#ifndef SHA512_H
+#define SHA512_H
+
+#include <skalibs/uint64.h>
+
+typedef struct SHA512Schedule_s SHA512Schedule, *SHA512Schedule_ref ;
+struct SHA512Schedule_s
+{
+  uint64 len ;
+  uint64 h[8] ;
+  unsigned char buf[128] ;
+} ;
+
+#define SHA512_INIT() { .len = 0, .h = { 0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL, 0x3c6ef372fe94f82bULL, 0xa54ff53a5f1d36f1ULL, 0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL, 0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL } }
+extern void sha512_init (SHA512Schedule *) ;
+extern void sha512_update (SHA512Schedule *, char const *, unsigned int) ;
+extern void sha512_final (SHA512Schedule *, char *digest) ;
+
+#endif
diff --git a/src/include/skalibs/stdcrypto.h b/src/include/skalibs/stdcrypto.h
index bd6751b..dd40d0d 100644
--- a/src/include/skalibs/stdcrypto.h
+++ b/src/include/skalibs/stdcrypto.h
@@ -7,5 +7,6 @@
 #include <skalibs/md5.h>
 #include <skalibs/sha1.h>
 #include <skalibs/sha256.h>
+#include <skalibs/sha512.h>
 
 #endif
diff --git a/src/libstdcrypto/INCLUDE b/src/libstdcrypto/INCLUDE
deleted file mode 100644
index 563254f..0000000
--- a/src/libstdcrypto/INCLUDE
+++ /dev/null
@@ -1,5 +0,0 @@
-rc4.h
-md5.h
-sha1.h
-sha256.h
-stdcrypto.h
diff --git a/src/libstdcrypto/Makefile b/src/libstdcrypto/Makefile
deleted file mode 100644
index 8c0d22f..0000000
--- a/src/libstdcrypto/Makefile
+++ /dev/null
@@ -1,7 +0,0 @@
-it: EXPORT- .done
-
-EXPORT-: gen-EXPORT
-	exec ./gen-EXPORT > EXPORT-
-
-.done: gen-Makefile
-	./gen-Makefile > Makefile.real && make -f Makefile.real && : > .done
diff --git a/src/libstdcrypto/sha512-internal.h b/src/libstdcrypto/sha512-internal.h
new file mode 100644
index 0000000..cd6bcbd
--- /dev/null
+++ b/src/libstdcrypto/sha512-internal.h
@@ -0,0 +1,10 @@
+/* ISC license. */
+
+#ifndef SHA512_INTERNAL_H
+#define SHA512_INTERNAL_H
+
+#include <skalibs/sha512.h>
+
+extern void sha512_transform (SHA512Schedule *ctx, unsigned char const *block) ;
+
+#endif
diff --git a/src/libstdcrypto/sha512_final.c b/src/libstdcrypto/sha512_final.c
new file mode 100644
index 0000000..968671b
--- /dev/null
+++ b/src/libstdcrypto/sha512_final.c
@@ -0,0 +1,25 @@
+/* ISC license. */
+
+#include <skalibs/bytestr.h>
+#include <skalibs/uint64.h>
+#include <skalibs/sha512.h>
+#include "sha512-internal.h"
+
+void sha512_final (SHA512Schedule *ctx, char *digest)
+{
+  register unsigned int i = 0 ;
+  register unsigned int pad = ctx->len % 128;
+
+  ctx->buf[pad++] = 0x80 ;
+  if (pad > 112)
+  {
+    byte_zero(ctx->buf + pad, 128 - pad) ;
+    sha512_transform(ctx, ctx->buf) ;
+    pad = 0 ;
+  }
+  byte_zero(ctx + pad, 120 - pad) ;
+  uint64_pack_big((char *)ctx->buf + 120, ctx->len << 3) ;
+  sha512_transform(ctx, ctx->buf) ;
+
+  for (; i < 8 ; i++) uint64_pack_big(digest + (i << 3), ctx->h[i]) ;
+}
diff --git a/src/libstdcrypto/sha512_init.c b/src/libstdcrypto/sha512_init.c
new file mode 100644
index 0000000..33b1d7c
--- /dev/null
+++ b/src/libstdcrypto/sha512_init.c
@@ -0,0 +1,9 @@
+/* ISC license. */
+
+#include <skalibs/sha512.h>
+
+void sha512_init (SHA512Schedule *ctx)
+{
+  SHA512Schedule empty = SHA512_INIT() ;
+  *ctx = empty ;
+}
diff --git a/src/libstdcrypto/sha512_transform.c b/src/libstdcrypto/sha512_transform.c
new file mode 100644
index 0000000..b28e97b
--- /dev/null
+++ b/src/libstdcrypto/sha512_transform.c
@@ -0,0 +1,93 @@
+/* ISC license. */
+
+#include <skalibs/uint64.h>
+#include <skalibs/sha512.h>
+#include "sha512-internal.h"
+
+static uint64 ror (uint64 n, unsigned int k)
+{
+  return (n >> k) | (n << (64 - k)) ;
+}
+
+#undef Ch
+#undef Maj
+#undef S0
+#undef S1
+#undef R0
+#undef R1
+
+#define Ch(x, y, z)  ((z) ^ ((x) & ((y) ^ (z))))
+#define Maj(x, y, z) (((x) & (y)) | ((z) & ((x) | (y))))
+#define S0(x)      (ror((x), 28) ^ ror((x), 34) ^ ror((x), 39))
+#define S1(x)      (ror((x), 14) ^ ror((x), 18) ^ ror((x), 41))
+#define R0(x)      (ror((x), 1) ^ ror((x), 8) ^ ((x) >> 7))
+#define R1(x)      (ror((x), 19) ^ ror((x), 61) ^ ((x) >> 6))
+
+void sha512_transform (SHA512Schedule *ctx, unsigned char const *block)
+{
+  static uint64 const K[80] =
+  {
+    0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
+    0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
+    0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
+    0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
+    0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
+    0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
+    0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
+    0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
+    0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
+    0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
+    0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
+    0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
+    0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
+    0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
+    0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
+    0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
+    0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
+    0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
+    0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
+    0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
+    0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
+    0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
+    0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
+    0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
+    0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
+    0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
+    0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
+    0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
+    0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
+    0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
+    0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
+    0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
+    0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
+    0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
+    0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
+    0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
+    0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
+    0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
+    0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
+    0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
+  } ;
+  uint64 w[80] ;
+  uint64 h[8] ;
+  uint64 t[2] ;
+  register unsigned int i = 0 ;
+
+  for (; i < 16 ; i++) uint64_unpack_big((char const *)block + (i << 3), w + i) ;
+  for (; i < 80; i++) w[i] = R1(w[i-2]) + w[i-7] + R0(w[i-15]) + w[i-16] ;
+  for (i = 0 ; i < 8 ; i++) h[i] = ctx->h[i] ;
+  for (i = 0 ; i < 80 ; i++)
+  {
+    t[0] = h[7] + S1(h[4]) + Ch(h[4], h[5], h[6]) + K[i] + w[i] ;
+    t[1] = S0(h[0]) + Maj(h[0], h[1], h[2]) ;
+    h[7] = h[6] ;
+    h[6] = h[5] ;
+    h[5] = h[4] ;
+    h[4] = h[3] + t[0] ;
+    h[3] = h[2] ;
+    h[2] = h[1] ;
+    h[1] = h[0] ;
+    h[0] = t[0] + t[1] ;
+  }
+  for (i = 0 ; i < 8 ; i++) ctx->h[i] += h[i] ;
+}
diff --git a/src/libstdcrypto/sha512_update.c b/src/libstdcrypto/sha512_update.c
new file mode 100644
index 0000000..4f66622
--- /dev/null
+++ b/src/libstdcrypto/sha512_update.c
@@ -0,0 +1,24 @@
+/* ISC license. */
+
+#include <skalibs/bytestr.h>
+#include <skalibs/sha512.h>
+#include "sha512-internal.h"
+
+void sha512_update (SHA512Schedule *ctx, char const *buf, unsigned int len)
+{
+  register unsigned int pad = ctx->len & 0x7fu ;
+  ctx->len += len ;
+  if (pad && len >= 128 - pad)
+  {
+    byte_copy(ctx->buf + pad, 128 - pad, buf) ;
+    buf += 128 - pad ; len -= 128 - pad ; pad = 0 ;
+    sha512_transform(ctx, ctx->buf) ;
+  }
+
+  while (len >= 128)
+  {
+    sha512_transform(ctx, (unsigned char const *)buf) ;
+    buf += 128 ; len -= 128 ;
+  }
+  byte_copy(ctx->buf + pad, len, buf) ;
+}
diff --git a/src/libstddjb/buffer_get.c b/src/libstddjb/buffer_get.c
index dcfa8e7..ff67a06 100644
--- a/src/libstddjb/buffer_get.c
+++ b/src/libstddjb/buffer_get.c
@@ -7,6 +7,6 @@ int buffer_get (buffer *b, char *s, unsigned int len)
 {
   unsigned int w = 0 ;
   register int r = buffer_getall(b, s, len, &w) ;
-  return r == -1 ? errno == EPIPE ? (errno = 0, 0) : -1 :
+  return r == -1 ? errno == EPIPE ? (errno = 0, (int)w) : -1 :
          !r ? (errno = EWOULDBLOCK, -1) : (int)w ;
 }
-- 
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