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cryptosoft: Fully support per-operation keys for auth algorithms.
Only pre-allocate auth contexts when a session-wide key is provided or for sessions without keys. For sessions with per-operation keys, always initialize the on-stack context directly rather than initializing the session context in swcr_authprepare (now removed) and then copying that session context into the on-stack context. This approach permits parallel auth operations without needing a serializing lock. In addition, the previous code assumed that auth sessions always provided an initial key unlike cipher sessions which assume either an initial key or per-op keys. While here, fix the Blake2 auth transforms to function like other auth transforms where Setkey is invoked after Init rather than before. Reviewed by: markj Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D33316
This commit is contained in:
John Baldwin
parent
b54d12841e
commit
6113a08b98
2 changed files with 83 additions and 95 deletions
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@ -28,8 +28,6 @@ extern int blake2s_ref(uint8_t *out, const void *in, const void *key,
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struct blake2b_xform_ctx {
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blake2b_state state;
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uint8_t key[BLAKE2B_KEYBYTES];
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uint16_t klen;
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};
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CTASSERT(sizeof(union authctx) >= sizeof(struct blake2b_xform_ctx));
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@ -39,24 +37,21 @@ blake2b_xform_init(void *vctx)
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struct blake2b_xform_ctx *ctx = vctx;
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int rc;
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if (ctx->klen > 0)
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rc = blake2b_init_key_ref(&ctx->state, BLAKE2B_OUTBYTES,
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ctx->key, ctx->klen);
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else
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rc = blake2b_init_ref(&ctx->state, BLAKE2B_OUTBYTES);
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rc = blake2b_init_ref(&ctx->state, BLAKE2B_OUTBYTES);
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if (rc != 0)
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panic("blake2b_init_key: invalid arguments");
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panic("blake2b_init: invalid arguments");
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}
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static void
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blake2b_xform_setkey(void *vctx, const uint8_t *key, u_int klen)
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{
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struct blake2b_xform_ctx *ctx = vctx;
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int rc;
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if (klen > sizeof(ctx->key))
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panic("invalid klen %u", (unsigned)klen);
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memcpy(ctx->key, key, klen);
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ctx->klen = klen;
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rc = blake2b_init_key_ref(&ctx->state, BLAKE2B_OUTBYTES, key,
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klen);
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if (rc != 0)
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panic("blake2b_init_key: invalid arguments");
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}
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static int
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@ -96,8 +91,6 @@ const struct auth_hash auth_hash_blake2b = {
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struct blake2s_xform_ctx {
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blake2s_state state;
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uint8_t key[BLAKE2S_KEYBYTES];
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uint16_t klen;
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};
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CTASSERT(sizeof(union authctx) >= sizeof(struct blake2s_xform_ctx));
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@ -107,24 +100,21 @@ blake2s_xform_init(void *vctx)
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struct blake2s_xform_ctx *ctx = vctx;
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int rc;
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if (ctx->klen > 0)
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rc = blake2s_init_key_ref(&ctx->state, BLAKE2S_OUTBYTES,
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ctx->key, ctx->klen);
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else
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rc = blake2s_init_ref(&ctx->state, BLAKE2S_OUTBYTES);
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rc = blake2s_init_ref(&ctx->state, BLAKE2S_OUTBYTES);
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if (rc != 0)
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panic("blake2s_init_key: invalid arguments");
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panic("blake2s_init: invalid arguments");
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}
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static void
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blake2s_xform_setkey(void *vctx, const uint8_t *key, u_int klen)
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{
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struct blake2s_xform_ctx *ctx = vctx;
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int rc;
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if (klen > sizeof(ctx->key))
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panic("invalid klen %u", (unsigned)klen);
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memcpy(ctx->key, key, klen);
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ctx->klen = klen;
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rc = blake2s_init_key_ref(&ctx->state, BLAKE2S_OUTBYTES, key,
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klen);
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if (rc != 0)
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panic("blake2s_init_key: invalid arguments");
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}
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static int
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@ -65,6 +65,7 @@ struct swcr_auth {
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void *sw_octx;
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const struct auth_hash *sw_axf;
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uint16_t sw_mlen;
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bool sw_hmac;
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};
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struct swcr_encdec {
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@ -283,33 +284,6 @@ swcr_encdec(struct swcr_session *ses, struct cryptop *crp)
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return (0);
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}
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static void
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swcr_authprepare(const struct auth_hash *axf, struct swcr_auth *sw,
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const uint8_t *key, int klen)
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{
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switch (axf->type) {
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case CRYPTO_SHA1_HMAC:
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case CRYPTO_SHA2_224_HMAC:
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case CRYPTO_SHA2_256_HMAC:
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case CRYPTO_SHA2_384_HMAC:
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case CRYPTO_SHA2_512_HMAC:
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case CRYPTO_NULL_HMAC:
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case CRYPTO_RIPEMD160_HMAC:
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hmac_init_ipad(axf, key, klen, sw->sw_ictx);
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hmac_init_opad(axf, key, klen, sw->sw_octx);
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break;
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case CRYPTO_POLY1305:
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case CRYPTO_BLAKE2B:
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case CRYPTO_BLAKE2S:
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axf->Setkey(sw->sw_ictx, key, klen);
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axf->Init(sw->sw_ictx);
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break;
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default:
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panic("%s: algorithm %d doesn't use keys", __func__, axf->type);
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}
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}
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/*
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* Compute or verify hash.
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*/
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@ -318,7 +292,7 @@ swcr_authcompute(struct swcr_session *ses, struct cryptop *crp)
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{
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u_char aalg[HASH_MAX_LEN];
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const struct crypto_session_params *csp;
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struct swcr_auth *sw;
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const struct swcr_auth *sw;
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const struct auth_hash *axf;
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union authctx ctx;
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int err;
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@ -329,11 +303,16 @@ swcr_authcompute(struct swcr_session *ses, struct cryptop *crp)
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csp = crypto_get_params(crp->crp_session);
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if (crp->crp_auth_key != NULL) {
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swcr_authprepare(axf, sw, crp->crp_auth_key,
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csp->csp_auth_klen);
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}
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bcopy(sw->sw_ictx, &ctx, axf->ctxsize);
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if (sw->sw_hmac) {
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hmac_init_ipad(axf, crp->crp_auth_key,
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csp->csp_auth_klen, &ctx);
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} else {
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axf->Init(&ctx);
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axf->Setkey(&ctx, crp->crp_auth_key,
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csp->csp_auth_klen);
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}
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} else
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memcpy(&ctx, sw->sw_ictx, axf->ctxsize);
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if (crp->crp_aad != NULL)
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err = axf->Update(&ctx, crp->crp_aad, crp->crp_aad_length);
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@ -358,8 +337,12 @@ swcr_authcompute(struct swcr_session *ses, struct cryptop *crp)
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axf->Update(&ctx, crp->crp_esn, 4);
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axf->Final(aalg, &ctx);
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if (sw->sw_octx != NULL) {
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bcopy(sw->sw_octx, &ctx, axf->ctxsize);
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if (sw->sw_hmac) {
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if (crp->crp_auth_key != NULL)
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hmac_init_opad(axf, crp->crp_auth_key,
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csp->csp_auth_klen, &ctx);
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else
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memcpy(&ctx, sw->sw_octx, axf->ctxsize);
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axf->Update(&ctx, aalg, axf->hashsize);
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axf->Final(aalg, &ctx);
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}
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@ -394,7 +377,7 @@ swcr_gmac(struct swcr_session *ses, struct cryptop *crp)
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struct crypto_buffer_cursor cc;
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const u_char *inblk;
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union authctx ctx;
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struct swcr_auth *swa;
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const struct swcr_auth *swa;
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const struct auth_hash *axf;
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uint32_t *blkp;
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size_t len;
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@ -402,12 +385,17 @@ swcr_gmac(struct swcr_session *ses, struct cryptop *crp)
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swa = &ses->swcr_auth;
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axf = swa->sw_axf;
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bcopy(swa->sw_ictx, &ctx, axf->ctxsize);
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blksz = GMAC_BLOCK_LEN;
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KASSERT(axf->blocksize == blksz, ("%s: axf block size mismatch",
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__func__));
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if (crp->crp_auth_key != NULL) {
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axf->Init(&ctx);
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axf->Setkey(&ctx, crp->crp_auth_key,
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crypto_get_params(crp->crp_session)->csp_auth_klen);
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} else
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memcpy(&ctx, swa->sw_ictx, axf->ctxsize);
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/* Initialize the IV */
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ivlen = AES_GCM_IV_LEN;
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crypto_read_iv(crp, iv);
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@ -694,7 +682,7 @@ swcr_ccm_cbc_mac(struct swcr_session *ses, struct cryptop *crp)
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u_char tag[AES_CBC_MAC_HASH_LEN];
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union authctx ctx;
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const struct crypto_session_params *csp;
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struct swcr_auth *swa;
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const struct swcr_auth *swa;
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const struct auth_hash *axf;
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int error, ivlen, len;
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@ -702,7 +690,11 @@ swcr_ccm_cbc_mac(struct swcr_session *ses, struct cryptop *crp)
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swa = &ses->swcr_auth;
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axf = swa->sw_axf;
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bcopy(swa->sw_ictx, &ctx, axf->ctxsize);
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if (crp->crp_auth_key != NULL) {
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axf->Init(&ctx);
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axf->Setkey(&ctx, crp->crp_auth_key, csp->csp_auth_klen);
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} else
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memcpy(&ctx, swa->sw_ictx, axf->ctxsize);
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/* Initialize the IV */
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ivlen = csp->csp_ivlen;
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@ -1218,9 +1210,12 @@ swcr_setup_auth(struct swcr_session *ses,
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swa->sw_mlen = axf->hashsize;
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else
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swa->sw_mlen = csp->csp_auth_mlen;
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swa->sw_ictx = malloc(axf->ctxsize, M_CRYPTO_DATA, M_NOWAIT);
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if (swa->sw_ictx == NULL)
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return (ENOBUFS);
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if (csp->csp_auth_klen == 0 || csp->csp_auth_key != NULL) {
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swa->sw_ictx = malloc(axf->ctxsize, M_CRYPTO_DATA,
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M_NOWAIT);
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if (swa->sw_ictx == NULL)
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return (ENOBUFS);
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}
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switch (csp->csp_auth_alg) {
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case CRYPTO_SHA1_HMAC:
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@ -1230,18 +1225,17 @@ swcr_setup_auth(struct swcr_session *ses,
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case CRYPTO_SHA2_512_HMAC:
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case CRYPTO_NULL_HMAC:
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case CRYPTO_RIPEMD160_HMAC:
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swa->sw_octx = malloc(axf->ctxsize, M_CRYPTO_DATA,
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M_NOWAIT);
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if (swa->sw_octx == NULL)
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return (ENOBUFS);
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swa->sw_hmac = true;
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if (csp->csp_auth_key != NULL) {
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swcr_authprepare(axf, swa, csp->csp_auth_key,
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csp->csp_auth_klen);
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swa->sw_octx = malloc(axf->ctxsize, M_CRYPTO_DATA,
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M_NOWAIT);
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if (swa->sw_octx == NULL)
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return (ENOBUFS);
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hmac_init_ipad(axf, csp->csp_auth_key,
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csp->csp_auth_klen, swa->sw_ictx);
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hmac_init_opad(axf, csp->csp_auth_key,
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csp->csp_auth_klen, swa->sw_octx);
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}
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if (csp->csp_mode == CSP_MODE_DIGEST)
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ses->swcr_process = swcr_authcompute;
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break;
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case CRYPTO_SHA1:
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case CRYPTO_SHA2_224:
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@ -1249,37 +1243,41 @@ swcr_setup_auth(struct swcr_session *ses,
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case CRYPTO_SHA2_384:
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case CRYPTO_SHA2_512:
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axf->Init(swa->sw_ictx);
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if (csp->csp_mode == CSP_MODE_DIGEST)
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ses->swcr_process = swcr_authcompute;
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break;
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case CRYPTO_AES_NIST_GMAC:
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axf->Init(swa->sw_ictx);
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axf->Setkey(swa->sw_ictx, csp->csp_auth_key,
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csp->csp_auth_klen);
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if (csp->csp_mode == CSP_MODE_DIGEST)
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ses->swcr_process = swcr_gmac;
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break;
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case CRYPTO_AES_CCM_CBC_MAC:
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case CRYPTO_POLY1305:
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if (csp->csp_auth_key != NULL) {
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axf->Init(swa->sw_ictx);
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axf->Setkey(swa->sw_ictx, csp->csp_auth_key,
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csp->csp_auth_klen);
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}
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break;
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case CRYPTO_BLAKE2B:
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case CRYPTO_BLAKE2S:
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/*
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* Blake2b and Blake2s support an optional key but do
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* not require one.
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*/
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if (csp->csp_auth_klen == 0 || csp->csp_auth_key != NULL)
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if (csp->csp_auth_klen == 0)
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axf->Init(swa->sw_ictx);
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else if (csp->csp_auth_key != NULL)
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axf->Setkey(swa->sw_ictx, csp->csp_auth_key,
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csp->csp_auth_klen);
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axf->Init(swa->sw_ictx);
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if (csp->csp_mode == CSP_MODE_DIGEST)
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ses->swcr_process = swcr_authcompute;
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break;
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case CRYPTO_AES_CCM_CBC_MAC:
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axf->Init(swa->sw_ictx);
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axf->Setkey(swa->sw_ictx, csp->csp_auth_key,
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csp->csp_auth_klen);
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if (csp->csp_mode == CSP_MODE_DIGEST)
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}
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if (csp->csp_mode == CSP_MODE_DIGEST) {
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switch (csp->csp_auth_alg) {
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case CRYPTO_AES_NIST_GMAC:
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ses->swcr_process = swcr_gmac;
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break;
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case CRYPTO_AES_CCM_CBC_MAC:
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ses->swcr_process = swcr_ccm_cbc_mac;
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break;
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break;
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default:
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ses->swcr_process = swcr_authcompute;
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}
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}
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return (0);
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