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prop 123 updates

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zzz
2019-02-11 21:37:17 +00:00
parent 39836d02bb
commit afa642cbda
1 changed files with 36 additions and 28 deletions
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i2p2www/spec/proposals/123-new-netdb-entries.rst
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@@ -5,7 +5,7 @@ New netDB Entries
:author: zzz, str4d, orignal
:created: 2016-01-16
:thread: http://zzz.i2p/topics/2051
:lastupdated: 2019-02-07
:lastupdated: 2019-02-11
:status: Open
:supercedes: 110, 120, 121, 122
@@ -519,7 +519,8 @@ SIG
Blinds a public key, using a secret alpha.
For a given keypair (privkey, pubkey) the following relationship holds::
BLIND_PUBKEY(pubkey, alpha) == DERIVE_PUBLIC(BLIND_PRIVKEY(privkey, alpha))
BLIND_PUBKEY(pubkey, alpha) ==
DERIVE_PUBLIC(BLIND_PRIVKEY(privkey, alpha))
DH
X25519 public key agreement system. Private keys of 32 bytes, public keys of 32
@@ -750,7 +751,11 @@ Definitions
~~~~~~~~~~~
B
The Ed25519 base point (generator) as in [ED25519-REFS]_
The Ed25519 base point (generator) 2^255 - 19 as in [ED25519-REFS]_
l
The Ed25519 order 2^252 + 27742317777372353535851937790883648493
as in [ED25519-REFS]_
DERIVE_PUBLIC(a)
Convert a private key to public, as in Ed25519 (mulitply by G)
@@ -797,17 +802,14 @@ GENERATE_ALPHA(destination, date, secret), for all parties:
// secret is optional, else zero-length
datestring = 8 bytes ASCII YYYYMMDD from the current date UTC
alpha = HKDF(SHA256(destination), datestring || secret, "i2pblinding1", 32)
// Now make a valid little-endian Ed25519 private key, as usual,
// by "clamping" the HKDF result:
alpha[0] &= 248;
alpha[31] &= 63;
alpha[31] |= 64;
TODO: Clamp as in Ed25519? or mod l? Distribution of alpha not same as
private keys? Which keys - blinded or unblinded?
// BLIND_PRIVKEY(), for the owner publishing the leaseset:
alpha = GENERATE_ALPHA(destination, date, secret)
//Take the destination's signing private key a
// Addition using group elements
blinded signing private key = a' = BLIND_PRIVKEY(a, alpha) = (a + alpha) mod B
blinded signing private key = a' = BLIND_PRIVKEY(a, alpha) = (a + alpha) mod l
blinded signing public key = A' = DERIVE_PUBLIC(a')
// BLIND_PUBKEY(), for the clients retrieving the leaseset:
@@ -1548,20 +1550,21 @@ New options interpreted router-side, sent in SessionConfig Mapping:
SessionConfig, to declare intent and check support.
i2cp.leaseSetEncType=nnn[,nnn] The encryption types to be used.
Interpreted client-side, but also passed to the router in the
SessionConfig, to declare intent and check support.
Interpreted client-side, but also passed to the router in
the SessionConfig, to declare intent and check support.
See proposals 144 and 145.
i2cp.leaseSetOfflineExpiration=nnn The expiration of the offline signature, ASCII,
seconds since the epoch.
i2cp.leaseSetTransientPublicKey=[type:]b64 The base 64 of the transient private key,
prefixed by an optional sig type number or name,
default DSA_SHA1.
prefixed by an optional sig type number
or name, default DSA_SHA1.
Length as inferred from the sig type
i2cp.leaseSetOfflineSignature=b64 The base 64 of the offline signature.
Length as inferred from the destination signing public key type
Length as inferred from the destination
signing public key type
@@ -1575,8 +1578,8 @@ New options interpreted client-side:
SessionConfig, to declare intent and check support.
i2cp.leaseSetEncType=nnn[,nnn] The encryption types to be used.
Interpreted client-side, but also passed to the router in the
SessionConfig, to declare intent and check support.
Interpreted client-side, but also passed to the router in
the SessionConfig, to declare intent and check support.
See proposals 144 and 145.
@@ -1653,7 +1656,8 @@ Format
Type 5 is a encrypted LS2
Type 7 is a meta LS2
LeaseSet: type specified above
Encryption Private Keys: For each public key in the lease set, in the same order
Encryption Private Keys: For each public key in the lease set,
in the same order
(Not present for Meta LS2)
- Encryption type (2 bytes, big endian)
- Encryption key length (2 bytes, big endian)
@@ -1752,13 +1756,17 @@ Changes
Bit 0: 1 for offline keys, 0 if not
Bits 15-1: Unused, set to 0 for compatibility with future uses
11. If offline keys, the transient key sig type (2 bytes, big endian)
12. If offline keys, the transient public key (length as implied by sig type)
13. If LeaseSet type is Meta (7), the number of meta entries to follow (1 byte)
14. If LeaseSet type is Meta (7), the Meta Entries. Each entry contains: (40 bytes)
12. If offline keys, the transient public key
(length as implied by sig type)
13. If LeaseSet type is Meta (7), the number of
meta entries to follow (1 byte)
14. If LeaseSet type is Meta (7), the Meta Entries.
Each entry contains: (40 bytes)
- Hash (32 bytes)
- Flags (3 bytes)
TBD. Set all to zero for compatibility with future uses.
TODO: Use a few bits to (optionally) indicate the type of the LS it is referencing.
TODO: Use a few bits to (optionally) indicate
the type of the LS it is referencing.
All zeros means don't know.
- Cost (priority) (1 byte)
- Expires (4 bytes, big endian, seconds since epoch, rolls over in 2106)