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| author | Louis Burda <quent.burda@gmail.com> | 2023-02-06 15:15:44 -0600 |
|---|---|---|
| committer | Louis Burda <quent.burda@gmail.com> | 2023-02-06 15:15:44 -0600 |
| commit | 1629595c7ee3cc336b5685c9c3630e7f9a11648c (patch) | |
| tree | 133a2208af2e7c6ce588a9889f88cbe37dc20ad0 /crypto | |
| parent | dc737cafcbc0d030d797b66a45ccf9fe92d09700 (diff) | |
| download | cachepc-linux-1629595c7ee3cc336b5685c9c3630e7f9a11648c.tar.gz cachepc-linux-1629595c7ee3cc336b5685c9c3630e7f9a11648c.zip | |
Only do vmmcall in aes_generic if dummy key detected
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/aes_generic.c | 57 |
1 files changed, 37 insertions, 20 deletions
diff --git a/crypto/aes_generic.c b/crypto/aes_generic.c index 25554b384dca..03188a379454 100644 --- a/crypto/aes_generic.c +++ b/crypto/aes_generic.c @@ -1140,6 +1140,8 @@ int crypto_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key, { struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm); + CPC_WARN("Set key\n"); + return aes_expandkey(ctx, in_key, key_len); } EXPORT_SYMBOL_GPL(crypto_aes_set_key); @@ -1177,13 +1179,6 @@ EXPORT_SYMBOL_GPL(crypto_aes_set_key); static void crypto_aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) { - int cpu; - - CPC_WARN("Running AES-Generic!"); - - cpu = get_cpu(); - CPC_DO_VMMCALL(SIGNAL, CPC_GUEST_START_TRACK, 0); - const struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm); u32 b0[4], b1[4]; const u32 *kp = ctx->key_enc + 4; @@ -1204,24 +1199,46 @@ static void crypto_aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) f_nround(b0, b1, kp); } - f_nround(b1, b0, kp); - f_nround(b0, b1, kp); - f_nround(b1, b0, kp); - f_nround(b0, b1, kp); - f_nround(b1, b0, kp); - f_nround(b0, b1, kp); - f_nround(b1, b0, kp); - f_nround(b0, b1, kp); - f_nround(b1, b0, kp); - f_lround(b0, b1, kp); + CPC_WARN("Running AES-Generic! %08x %08x %08x %08x\n", + kp[0], kp[1], kp[2], kp[3]); + + const u8 cpc_key[16] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }; + if (1 || !memcmp(kp, cpc_key, 16)) { + spinlock_t lock; + spin_lock_init(&lock); + spin_lock_irq(&lock); + CPC_DO_VMMCALL(KVM_HC_CPC_VMMCALL_SIGNAL, CPC_GUEST_START_TRACK, 0); + + f_nround(b1, b0, kp); + f_nround(b0, b1, kp); + f_nround(b1, b0, kp); + f_nround(b0, b1, kp); + f_nround(b1, b0, kp); + f_nround(b0, b1, kp); + f_nround(b1, b0, kp); + f_nround(b0, b1, kp); + f_nround(b1, b0, kp); + f_lround(b0, b1, kp); + + CPC_DO_VMMCALL(KVM_HC_CPC_VMMCALL_SIGNAL, CPC_GUEST_STOP_TRACK, 0); + spin_unlock_irq(&lock); + } else { + f_nround(b1, b0, kp); + f_nround(b0, b1, kp); + f_nround(b1, b0, kp); + f_nround(b0, b1, kp); + f_nround(b1, b0, kp); + f_nround(b0, b1, kp); + f_nround(b1, b0, kp); + f_nround(b0, b1, kp); + f_nround(b1, b0, kp); + f_lround(b0, b1, kp); + } put_unaligned_le32(b0[0], out); put_unaligned_le32(b0[1], out + 4); put_unaligned_le32(b0[2], out + 8); put_unaligned_le32(b0[3], out + 12); - - CPC_DO_VMMCALL(KVM_HC_CPC_VMMCALL_SIGNAL, CPC_GUEST_STOP_TRACK, 0); - put_cpu(); } /* decrypt a block of text */ |