replaced Pearson hashing permutation by aes' s-box

src/pearson.c

@@ -29,6 +29,26 @@
 // however, it needs to be generated by once calling pearson_hash_init() upfront
 // #define LOW_MEM_FOOTPRINT
 
+// AES S-Box table -- allows for eventually supported hardware accelerated look-up
+static const uint8_t t[256] ={
+ 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
+ 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
+ 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
+ 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
+ 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
+ 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
+ 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
+ 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
+ 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
+ 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
+ 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
+ 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
+ 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
+ 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
+ 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
+ 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 };
+
+/*
 // table as in original paper "Fast Hashing of Variable-Length Text Strings" by Peter K. Pearson
 // as published in The Communications of the ACM  Vol.33, No.  6 (June 1990), pp. 677-680.
 static const uint8_t t[256] ={
@@ -48,26 +68,7 @@ static const uint8_t t[256] ={
   0xe9, 0x28, 0xba, 0x93, 0xc6, 0xc0, 0x9b, 0x21, 0xa4, 0xbf, 0x62, 0xcc, 0xa5, 0xb4, 0x75, 0x4c,
   0x8c, 0x24, 0xd2, 0xac, 0x29, 0x36, 0x9f, 0x08, 0xb9, 0xe8, 0x71, 0xc4, 0xe7, 0x2f, 0x92, 0x78,
   0x33, 0x41, 0x1c, 0x90, 0xfe, 0xdd, 0x5d, 0xbd, 0xc2, 0x8b, 0x70, 0x2b, 0x47, 0x6d, 0xb8, 0xd1 };
-
-/*
-// alternative table as used in RFC 3074 and NOT as in original paper
-static const uint8_t t[256] ={
-0xfb, 0xaf, 0x77, 0xd7, 0x51, 0x0e, 0x4f, 0xbf, 0x67, 0x31, 0xb5, 0x8f, 0xba, 0x9d, 0x00, 0xe8,
-0x1f, 0x20, 0x37, 0x3c, 0x98, 0x3a, 0x11, 0xed, 0xae, 0x46, 0xa0, 0x90, 0xdc, 0x5a, 0x39, 0xdf,
-0x3b, 0x03, 0x12, 0x8c, 0x6f, 0xa6, 0xcb, 0xc4, 0x86, 0xf3, 0x7c, 0x5f, 0xde, 0xb3, 0xc5, 0x41,
-0xb4, 0x30, 0x24, 0x0f, 0x6b, 0x2e, 0xe9, 0x82, 0xa5, 0x1e, 0x7b, 0xa1, 0xd1, 0x17, 0x61, 0x10,
-0x28, 0x5b, 0xdb, 0x3d, 0x64, 0x0a, 0xd2, 0x6d, 0xfa, 0x7f, 0x16, 0x8a, 0x1d, 0x6c, 0xf4, 0x43,
-0xcf, 0x09, 0xb2, 0xcc, 0x4a, 0x62, 0x7e, 0xf9, 0xa7, 0x74, 0x22, 0x4d, 0xc1, 0xc8, 0x79, 0x05,
-0x14, 0x71, 0x47, 0x23, 0x80, 0x0d, 0xb6, 0x5e, 0x19, 0xe2, 0xe3, 0xc7, 0x4b, 0x1b, 0x29, 0xf5,
-0xe6, 0xe0, 0x2b, 0xe1, 0xb1, 0x1a, 0x9b, 0x96, 0xd4, 0x8e, 0xda, 0x73, 0xf1, 0x49, 0x58, 0x69,
-0x27, 0x72, 0x3e, 0xff, 0xc0, 0xc9, 0x91, 0xd6, 0xa8, 0x9e, 0xdd, 0x94, 0x9a, 0x7a, 0x0c, 0x54,
-0x52, 0xa3, 0x2c, 0x8b, 0xe4, 0xec, 0xcd, 0xf2, 0xd9, 0x0b, 0xbb, 0x92, 0x9f, 0x40, 0x56, 0xef,
-0xc3, 0x2a, 0x6a, 0xc6, 0x76, 0x70, 0xb8, 0xac, 0x57, 0x02, 0xad, 0x75, 0xb0, 0xe5, 0xf7, 0xfd,
-0x89, 0xb9, 0x63, 0xa4, 0x66, 0x93, 0x2d, 0x42, 0xe7, 0x34, 0x8d, 0xd3, 0xc2, 0xce, 0xf6, 0xee,
-0x38, 0x6e, 0x4e, 0xf8, 0x3f, 0xf0, 0xbd, 0x5d, 0x5c, 0x33, 0x35, 0xb7, 0x13, 0xab, 0x48, 0x32,
-0x21, 0x68, 0x65, 0x45, 0x08, 0xfc, 0x53, 0x78, 0x4c, 0x87, 0x55, 0x36, 0xca, 0x7d, 0xbc, 0xd5,
-0x60, 0xeb, 0x88, 0xd0, 0xa2, 0x81, 0xbe, 0x84, 0x9c, 0x26, 0x2f, 0x01, 0x07, 0xfe, 0x18, 0x04,
-0xd8, 0x83, 0x59, 0x15, 0x1c, 0x85, 0x25, 0x99, 0x95, 0x50, 0xaa, 0x44, 0x06, 0xa9, 0xea, 0x97 }; */
+*/
 
 
 #ifndef LOW_MEM_FOOTPRINT