lib/crypto/aes.c

173  * @ctx:	The location where the computed key will be stored.
185 int aes_expandkey(struct crypto_aes_ctx *ctx, const u8 *in_key,
196 	ctx->key_length = key_len;
199 		ctx->key_enc[i] = get_unaligned_le32(in_key + i * sizeof(u32));
202 		u32 *rki = ctx->key_enc + (i * kwords);
231 	ctx->key_dec[0] = ctx->key_enc[key_len + 24];
232 	ctx->key_dec[1] = ctx->key_enc[key_len + 25];
233 	ctx->key_dec[2] = ctx->key_enc[key_len + 26];
234 	ctx->key_dec[3] = ctx->key_enc[key_len + 27];
237 		ctx->key_dec[i]     = inv_mix_columns(ctx->key_enc[j]);
238 		ctx->key_dec[i + 1] = inv_mix_columns(ctx->key_enc[j + 1]);
239 		ctx->key_dec[i + 2] = inv_mix_columns(ctx->key_enc[j + 2]);
240 		ctx->key_dec[i + 3] = inv_mix_columns(ctx->key_enc[j + 3]);
243 	ctx->key_dec[i]     = ctx->key_enc[0];
244 	ctx->key_dec[i + 1] = ctx->key_enc[1];
245 	ctx->key_dec[i + 2] = ctx->key_enc[2];
246 	ctx->key_dec[i + 3] = ctx->key_enc[3];
254  * @ctx:	Context struct containing the key schedule
258 void aes_encrypt(const struct crypto_aes_ctx *ctx, u8 *out, const u8 *in)
260 	const u32 *rkp = ctx->key_enc + 4;
261 	int rounds = 6 + ctx->key_length / 4;
265 	st0[0] = ctx->key_enc[0] ^ get_unaligned_le32(in);
266 	st0[1] = ctx->key_enc[1] ^ get_unaligned_le32(in + 4);
267 	st0[2] = ctx->key_enc[2] ^ get_unaligned_le32(in + 8);
268 	st0[3] = ctx->key_enc[3] ^ get_unaligned_le32(in + 12);
305  * @ctx:	Context struct containing the key schedule
309 void aes_decrypt(const struct crypto_aes_ctx *ctx, u8 *out, const u8 *in)
311 	const u32 *rkp = ctx->key_dec + 4;
312 	int rounds = 6 + ctx->key_length / 4;
316 	st0[0] = ctx->key_dec[0] ^ get_unaligned_le32(in);
317 	st0[1] = ctx->key_dec[1] ^ get_unaligned_le32(in + 4);
318 	st0[2] = ctx->key_dec[2] ^ get_unaligned_le32(in + 8);
319 	st0[3] = ctx->key_dec[3] ^ get_unaligned_le32(in + 12);