In AES-NI and in the Linux kernel's lib/crypto/aes.c, the byte ordering is increasing from right to left in little endian but rotation is from left to right. FIPS-197 byte addresses in arrays are increasing from left to right in little endian but rotation is from right to left. ^ Rotation is opposite of byte order direction.^ Other Rijndael variants require BR words of expanded key, where B is the block size in words.^ Other Rijndael variants require max( N, B) + 7 round keys, where B is the block size in words.^ The Rijndael variants with larger block sizes use more of these constants, up to rcon 29 for Rijndael with 128-bit keys and 256 bit blocks (needs 15 round keys of each 256 bit, which means 30 full rounds of key expansion, which means 29 calls to the key schedule core using the round constants).Then for i = 0 … 4 R − 1 value is the least significant byte at index 0
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