removed top level directory

1 files changed, 188 insertions, 0 deletions

diff --git a/src/sha1.c b/src/sha1.c
new file mode 100644
index 0000000..ee06e92
--- /dev/null
+++ b/src/sha1.c
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+/*
+SHA-1 in C
+By Steve Reid <sreid@sea-to-sky.net>
+100% Public Domain
+
+-----------------
+Modified 7/98
+By James H. Brown <jbrown@burgoyne.com>
+Still 100% Public Domain
+
+-----------------
+Adopted for s/qmail 2/2020
+feh
+Still 100% Public Domain; though requiring fehQlibs-14
+
+*/
+
+#include <string.h>
+#include "sha1.h"
+#include "byte.h"
+
+// #define SHA1HANDSOFF
+
+#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
+
+/* blk0() and blk() perform the initial expand. */
+/* I got the idea of expanding during the round function from SSLeay */
+/* FIXME: can we do this in an endian-proof way? */
+#ifndef WORDS_BIGENDIAN
+#define blk0(i) (block->l[i] = (rol(block->l[i],24) & 0xFF00FF00) \
+    | (rol(block->l[i],8) & 0x00FF00FF))
+#else
+#define blk0(i) block->l[i]
+#endif
+#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
+    ^block->l[(i+2)&15]^block->l[i&15],1))
+
+/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
+#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
+#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
+#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
+#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
+#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
+
+/* Hash a single 512-bit block. This is the core of the algorithm. */
+
+void sha1_transform(uint32_t state[5],const uint8_t buffer[SHA1_BLOCKSIZE])
+{
+  uint32_t a, b, c, d, e;
+  typedef union {
+      uint8_t c[SHA1_BLOCKSIZE];
+      uint32_t l[16];
+  } CHAR64LONG16;
+  CHAR64LONG16 *block;
+
+#ifdef SHA1HANDSOFF
+  static uint8_t workspace[SHA1_BLOCKSIZE];
+
+  block = (CHAR64LONG16 *) workspace;
+  byte_copy(block,SHA1_BLOCKSIZE,buffer);
+#else
+  block = (CHAR64LONG16 *) buffer;
+#endif
+
+  /* Copy context->state[] to working vars */
+  a = state[0];
+  b = state[1];
+  c = state[2];
+  d = state[3];
+  e = state[4];
+
+  /* 4 rounds of 20 operations each. Loop unrolled. */
+  R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
+  R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
+  R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
+  R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
+  R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
+  R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
+  R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
+  R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
+  R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
+  R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
+  R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
+  R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
+  R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
+  R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
+  R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
+  R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
+  R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
+  R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
+  R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
+  R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
+
+  /* Add the working vars back into context.state[] */
+  state[0] += a;
+  state[1] += b;
+  state[2] += c;
+  state[3] += d;
+  state[4] += e;
+
+  /* Wipe variables */
+  a = b = c = d = e = 0;
+
+#ifdef SHA1HANDSOFF
+	byte_zero(block,64);
+#endif
+}
+
+/* SHA1Init - Initialize new context */
+
+void sha1_init(sha1_ctx *context)
+{
+  /* SHA1 initialization constants */
+  context->state[0] = 0x67452301;
+  context->state[1] = 0xEFCDAB89;
+  context->state[2] = 0x98BADCFE;
+  context->state[3] = 0x10325476;
+  context->state[4] = 0xC3D2E1F0;
+  context->count[0] = context->count[1] = 0;
+}
+
+/* Run your data through this. */
+
+void sha1_update(sha1_ctx *context,const uint8_t *data,uint32_t len)
+{
+  uint32_t i, j;
+
+  j = (context->count[0] >> 3) & 63;
+  if ((context->count[0] += len << 3) < (len << 3))
+    context->count[1]++;
+  context->count[1] += (len >> 29);
+  if ((j + len) > 63) {
+    byte_copy(&context->buffer[j],(i = 64 - j),data);
+    sha1_transform(context->state,context->buffer);
+    for (; i + 63 < len; i += 64) {
+      sha1_transform(context->state,data + i);
+    }
+    j = 0;
+  } else
+    i = 0;
+  byte_copy(&context->buffer[j],len - i,&data[i]);
+}
+
+/* Add padding and return the message digest. */
+
+void sha1_final(uint8_t digest[SHA1_DIGESTSIZE],sha1_ctx *context)
+{
+  uint32_t i;
+  uint8_t finalcount[8];
+
+  for (i = 0; i < 8; i++) {
+    finalcount[i] = (uint8_t)((context->count[(i >= 4 ? 0 : 1)]
+      >> ((3 - (i & 3)) * 8)) & 255);        /* Endian independent */
+  }
+  sha1_update(context,(uint8_t *) "\200",1);
+
+  while ((context->count[0] & 504) != 448)
+    sha1_update(context,(uint8_t *) "\0",1);
+  
+  sha1_update(context,finalcount,8);        /* Should cause a SHA1_Transform() */
+
+  for (i = 0; i < SHA1_DIGESTSIZE; i++) 
+    digest[i] = (uint8_t) ((context->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255);
+
+  /* Wipe variables */
+  i = 0;
+  byte_zero(context->buffer,64);
+  byte_zero(context->state,20);
+  byte_zero(context->count,8);
+  byte_zero(finalcount,8);  
+
+#ifdef SHA1HANDSOFF        /* make SHA1Transform overwrite its own static vars */
+  sha1_transform(context->state,context->buffer);
+#endif
+}
+
+void sha1_hash(char *hash,const char *str,uint32_t len)
+{
+  sha1_ctx context;
+  int i;
+
+  sha1_init(&context);
+  for (i = 0; i < len; i++)
+    sha1_update(&context,(uint8_t *)str + i,1);
+
+  sha1_final((uint8_t *)hash,&context);
+  hash[20] = '\0';
+}