HMAC_OPAD_VALUE
opad[i] ^= HMAC_OPAD_VALUE;
opad[i] ^= HMAC_OPAD_VALUE;
tfmctx->opad[i] ^= HMAC_OPAD_VALUE;
ctx->opad[index] ^= HMAC_OPAD_VALUE;
ctx->u.sha.opad[i] = ctx->u.sha.key[i] ^ HMAC_OPAD_VALUE;
opad[i] ^= HMAC_OPAD_VALUE;
opad[i] ^= HMAC_OPAD_VALUE;
ret = register_chain_var(tfm, HMAC_OPAD_VALUE, otarget,
rctx->buffer[i] = tctx->key[i] ^ HMAC_OPAD_VALUE;
opad[i] ^= HMAC_OPAD_VALUE;
bctx->opad[i] ^= HMAC_OPAD_VALUE;
derived_key.w[i] ^= REPEAT_BYTE(HMAC_OPAD_VALUE ^
derived_key.w[i] ^= REPEAT_BYTE(HMAC_OPAD_VALUE ^
derived_key.w[i] ^= REPEAT_BYTE(HMAC_OPAD_VALUE ^
derived_key.w[i] ^= REPEAT_BYTE(HMAC_OPAD_VALUE ^