Change array representation of binary polynomials to make GF2m part of

[openssl.git] / crypto / ec / ec_lcl.h

diff --git a/crypto/ec/ec_lcl.h b/crypto/ec/ec_lcl.h
index fdd7aa275563afc7e5e170fc0d65f02ff26d1e23..3e2c34b0bc8474f75461efa4be14292dd3ee9e86 100644 (file)
--- a/crypto/ec/ec_lcl.h
+++ b/crypto/ec/ec_lcl.h
@@ -205,11 +205,14 @@ struct ec_group_st {
                       * irreducible polynomial defining the field.
                       */
 
-       unsigned int poly[5]; /* Field specification for curves over GF(2^m).
-                              * The irreducible f(t) is then of the form:
-                              *     t^poly[0] + t^poly[1] + ... + t^poly[k]
-                              * where m = poly[0] > poly[1] > ... > poly[k] = 0.
-                              */
+       int poly[6]; /* Field specification for curves over GF(2^m).
+                     * The irreducible f(t) is then of the form:
+                     *     t^poly[0] + t^poly[1] + ... + t^poly[k]
+                     * where m = poly[0] > poly[1] > ... > poly[k] = 0.
+                     * The array is terminated with poly[k+1]=-1.
+                     * All elliptic curve irreducibles have at most 5
+                     * non-zero terms.
+                     */
 
        BIGNUM a, b; /* Curve coefficients.
                      * (Here the assumption is that BIGNUMs can be used