CHANSERV: remove accidental sendemail from SETEMAIL command.

[irc/quakenet/newserv.git] / lib / hmac.c

diff --git a/lib/hmac.c b/lib/hmac.c
index 54fbb5b43d05896f2c3a284797e80c5aeb4d8c9f..ceb6df0e658a648c8ffb84a947250604c18b7791 100644 (file)
--- a/lib/hmac.c
+++ b/lib/hmac.c
@@ -1,5 +1,6 @@
 #include "hmac.h"
 #include <string.h>
+#include <ctype.h>
 
 void hmacsha256_init(hmacsha256 *c, unsigned char *key, int keylen) {
   unsigned char realkey[64], outerkey[64], innerkey[64];
@@ -39,3 +40,108 @@ void hmacsha256_final(hmacsha256 *c, unsigned char *digest) {
   SHA256_Final(digest, &c->outer);
 }
 
+void hmacsha1_init(hmacsha1 *c, unsigned char *key, int keylen) {
+  unsigned char realkey[64], outerkey[64], innerkey[64];
+  SHA1_CTX keyc;
+  int i;
+
+  memset(realkey, 0, sizeof(realkey));
+  if(keylen > 64) {
+    SHA1Init(&keyc);
+    SHA1Update(&keyc, key, keylen);
+    SHA1Final(realkey, &keyc);
+  } else {
+    memcpy(realkey, key, keylen);
+  }
+
+  /* abusing the cache here, if we do sha1 in between that'll erase it */
+  for(i=0;i<64;i++) {
+    int r = realkey[i];
+    innerkey[i] = r ^ 0x36;
+    outerkey[i] = r ^ 0x5c;
+  }
+
+  SHA1Init(&c->outer);
+  SHA1Init(&c->inner);
+  SHA1Update(&c->outer, outerkey, 64);
+  SHA1Update(&c->inner, innerkey, 64);
+}
+
+void hmacsha1_update(hmacsha1 *c, unsigned char *message, int messagelen) {
+  SHA1Update(&c->inner, message, messagelen);
+}
+
+void hmacsha1_final(hmacsha1 *c, unsigned char *digest) {
+  SHA1Final(digest, &c->inner);
+  SHA1Update(&c->outer, digest, 20);
+  SHA1Final(digest, &c->outer);
+}
+
+void hmacmd5_init(hmacmd5 *c, unsigned char *key, int keylen) {
+  unsigned char realkey[64], outerkey[64], innerkey[64];
+  MD5Context keyc;
+  int i;
+
+  memset(realkey, 0, sizeof(realkey));
+  if(keylen > 64) {
+    MD5Init(&keyc);
+    MD5Update(&keyc, key, keylen);
+    MD5Final(realkey, &keyc);
+  } else {
+    memcpy(realkey, key, keylen);
+  }
+
+  /* abusing the cache here, if we do sha1 in between that'll erase it */
+  for(i=0;i<64;i++) {
+    int r = realkey[i];
+    innerkey[i] = r ^ 0x36;
+    outerkey[i] = r ^ 0x5c;
+  }
+
+  MD5Init(&c->outer);
+  MD5Init(&c->inner);
+  MD5Update(&c->outer, outerkey, 64);
+  MD5Update(&c->inner, innerkey, 64);
+}
+
+void hmacmd5_update(hmacmd5 *c, unsigned char *message, int messagelen) {
+  MD5Update(&c->inner, message, messagelen);
+}
+
+void hmacmd5_final(hmacmd5 *c, unsigned char *digest) {
+  MD5Final(digest, &c->inner);
+  MD5Update(&c->outer, digest, 16);
+  MD5Final(digest, &c->outer);
+}
+
+static const char *hexdigits = "0123456789abcdef";
+
+char *hmac_printhex(unsigned char *data, char *out, size_t len) {
+  size_t i;
+  unsigned char *o = (unsigned char *)out;
+
+  for(i=0;i<len;i++) {
+    *o++ = hexdigits[(*data & 0xf0) >> 4];
+    *o++ = hexdigits[*data & 0x0f];
+    data++;
+  }
+
+  *o = '\0';
+  return out;
+}
+
+int hmac_strcmp(const char *a, const char *b) {
+  int result = 1;
+
+  if(!a || !b)
+    return 1;
+
+  if(strlen(a) != strlen(b))
+    return 1;
+
+  while(*a)
+    result&=(tolower(*a++) == tolower(*b++));
+
+  return !result;
+}
+