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Downgrade to 256-bit curve for performance.

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Also reduced hash function to 256 bits because our target security level
is now 128 bits.
This commit is contained in:
akwizgran
2015-01-09 13:23:18 +00:00
parent 5d46d3a4b4
commit 112d80420c
10 changed files with 53 additions and 99 deletions
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10
briar-api/src/org/briarproject/api/AuthorConstants.java
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@@ -11,9 +11,9 @@ public interface AuthorConstants {
* Public keys use SEC1 format: 0x04 x y, where x and y are unsigned
* big-endian integers.
* <p>
* For a 384-bit elliptic curve, the maximum length is 2 * (384/8) + 1.
* For a 256-bit elliptic curve, the maximum length is 2 * 256 / 8 + 1.
*/
int MAX_PUBLIC_KEY_LENGTH = 97;
int MAX_PUBLIC_KEY_LENGTH = 65;
/**
* The maximum length of a signature in bytes.
@@ -24,8 +24,8 @@ public interface AuthorConstants {
* length, len3 is len(s) as a DER length, and r and s are signed
* big-endian integers of minimal length.
* <p>
* For a 384-bit elliptic curve, the lengths are one byte each, so the
* maximum length is 2 * (384/8) + 8.
* For a 256-bit elliptic curve, the lengths are one byte each, so the
* maximum length is 2 * 256 / 8 + 8.
*/
int MAX_SIGNATURE_LENGTH = 104;
int MAX_SIGNATURE_LENGTH = 72;
}