Rejecting Class Because It Failed Compile-time Verification
I am trying to integrate curve25519-java from openwhispersystems into my Android app and compiling it with API 23 (Marshmallow). When using non native code I get this runtime excep
Solution 1:
This exception is thrown because of too many variable in single method. Just dividing it to two method fixes the issue. Here is the fix:
package org.whispersystems.curve25519.java;
publicclassfe_mul {
//CONVERT #include "fe.h"//CONVERT #include "long.h"/*
h = f * g
Can overlap h with f or g.
Preconditions:
|f| bounded by 1.65*2^26,1.65*2^25,1.65*2^26,1.65*2^25,etc.
|g| bounded by 1.65*2^26,1.65*2^25,1.65*2^26,1.65*2^25,etc.
Postconditions:
|h| bounded by 1.01*2^25,1.01*2^24,1.01*2^25,1.01*2^24,etc.
*//*
Notes on implementation strategy:
Using schoolbook multiplication.
Karatsuba would save a little in some cost models.
Most multiplications by 2 and 19 are 32-bit precomputations;
cheaper than 64-bit postcomputations.
There is one remaining multiplication by 19 in the carry chain;
one *19 precomputation can be merged into this,
but the resulting data flow is considerably less clean.
There are 12 carries below.
10 of them are 2-way parallelizable and vectorizable.
Can get away with 11 carries, but then data flow is much deeper.
With tighter constraints on inputs can squeeze carries into int32.
*/privatestaticlong[] fe_mul1(int[] f,int[] g){
intf0= f[0];
intf1= f[1];
intf2= f[2];
intf3= f[3];
intf4= f[4];
intf5= f[5];
intf6= f[6];
intf7= f[7];
intf8= f[8];
intf9= f[9];
intg0= g[0];
intg1= g[1];
intg2= g[2];
intg3= g[3];
intg4= g[4];
intg5= g[5];
intg6= g[6];
intg7= g[7];
intg8= g[8];
intg9= g[9];
intg1_19=19 * g1; /* 1.959375*2^29 */intg2_19=19 * g2; /* 1.959375*2^30; still ok */intg3_19=19 * g3;
intg4_19=19 * g4;
intg5_19=19 * g5;
intg6_19=19 * g6;
intg7_19=19 * g7;
intg8_19=19 * g8;
intg9_19=19 * g9;
intf1_2=2 * f1;
intf3_2=2 * f3;
intf5_2=2 * f5;
intf7_2=2 * f7;
intf9_2=2 * f9;
longf0g0= f0 * (long) g0;
longf0g1= f0 * (long) g1;
longf0g2= f0 * (long) g2;
longf0g3= f0 * (long) g3;
longf0g4= f0 * (long) g4;
longf0g5= f0 * (long) g5;
longf0g6= f0 * (long) g6;
longf0g7= f0 * (long) g7;
longf0g8= f0 * (long) g8;
longf0g9= f0 * (long) g9;
longf1g0= f1 * (long) g0;
longf1g1_2= f1_2 * (long) g1;
longf1g2= f1 * (long) g2;
longf1g3_2= f1_2 * (long) g3;
longf1g4= f1 * (long) g4;
longf1g5_2= f1_2 * (long) g5;
longf1g6= f1 * (long) g6;
longf1g7_2= f1_2 * (long) g7;
longf1g8= f1 * (long) g8;
longf1g9_38= f1_2 * (long) g9_19;
longf2g0= f2 * (long) g0;
longf2g1= f2 * (long) g1;
longf2g2= f2 * (long) g2;
longf2g3= f2 * (long) g3;
longf2g4= f2 * (long) g4;
longf2g5= f2 * (long) g5;
longf2g6= f2 * (long) g6;
longf2g7= f2 * (long) g7;
longf2g8_19= f2 * (long) g8_19;
longf2g9_19= f2 * (long) g9_19;
longf3g0= f3 * (long) g0;
longf3g1_2= f3_2 * (long) g1;
longf3g2= f3 * (long) g2;
longf3g3_2= f3_2 * (long) g3;
longf3g4= f3 * (long) g4;
longf3g5_2= f3_2 * (long) g5;
longf3g6= f3 * (long) g6;
longf3g7_38= f3_2 * (long) g7_19;
longf3g8_19= f3 * (long) g8_19;
longf3g9_38= f3_2 * (long) g9_19;
longf4g0= f4 * (long) g0;
longf4g1= f4 * (long) g1;
longf4g2= f4 * (long) g2;
longf4g3= f4 * (long) g3;
longf4g4= f4 * (long) g4;
longf4g5= f4 * (long) g5;
longf4g6_19= f4 * (long) g6_19;
longf4g7_19= f4 * (long) g7_19;
longf4g8_19= f4 * (long) g8_19;
longf4g9_19= f4 * (long) g9_19;
longf5g0= f5 * (long) g0;
longf5g1_2= f5_2 * (long) g1;
longf5g2= f5 * (long) g2;
longf5g3_2= f5_2 * (long) g3;
longf5g4= f5 * (long) g4;
longf5g5_38= f5_2 * (long) g5_19;
longf5g6_19= f5 * (long) g6_19;
longf5g7_38= f5_2 * (long) g7_19;
longf5g8_19= f5 * (long) g8_19;
longf5g9_38= f5_2 * (long) g9_19;
longf6g0= f6 * (long) g0;
longf6g1= f6 * (long) g1;
longf6g2= f6 * (long) g2;
longf6g3= f6 * (long) g3;
longf6g4_19= f6 * (long) g4_19;
longf6g5_19= f6 * (long) g5_19;
longf6g6_19= f6 * (long) g6_19;
longf6g7_19= f6 * (long) g7_19;
longf6g8_19= f6 * (long) g8_19;
longf6g9_19= f6 * (long) g9_19;
longf7g0= f7 * (long) g0;
longf7g1_2= f7_2 * (long) g1;
longf7g2= f7 * (long) g2;
longf7g3_38= f7_2 * (long) g3_19;
longf7g4_19= f7 * (long) g4_19;
longf7g5_38= f7_2 * (long) g5_19;
longf7g6_19= f7 * (long) g6_19;
longf7g7_38= f7_2 * (long) g7_19;
longf7g8_19= f7 * (long) g8_19;
longf7g9_38= f7_2 * (long) g9_19;
longf8g0= f8 * (long) g0;
longf8g1= f8 * (long) g1;
longf8g2_19= f8 * (long) g2_19;
longf8g3_19= f8 * (long) g3_19;
longf8g4_19= f8 * (long) g4_19;
longf8g5_19= f8 * (long) g5_19;
longf8g6_19= f8 * (long) g6_19;
longf8g7_19= f8 * (long) g7_19;
longf8g8_19= f8 * (long) g8_19;
longf8g9_19= f8 * (long) g9_19;
longf9g0= f9 * (long) g0;
longf9g1_38= f9_2 * (long) g1_19;
longf9g2_19= f9 * (long) g2_19;
longf9g3_38= f9_2 * (long) g3_19;
longf9g4_19= f9 * (long) g4_19;
longf9g5_38= f9_2 * (long) g5_19;
longf9g6_19= f9 * (long) g6_19;
longf9g7_38= f9_2 * (long) g7_19;
longf9g8_19= f9 * (long) g8_19;
longf9g9_38= f9_2 * (long) g9_19;
long h[] = newlong[10];
h[0] = f0g0+f1g9_38+f2g8_19+f3g7_38+f4g6_19+f5g5_38+f6g4_19+f7g3_38+f8g2_19+f9g1_38;
h[1] = f0g1+f1g0 +f2g9_19+f3g8_19+f4g7_19+f5g6_19+f6g5_19+f7g4_19+f8g3_19+f9g2_19;
h[2] = f0g2+f1g1_2 +f2g0 +f3g9_38+f4g8_19+f5g7_38+f6g6_19+f7g5_38+f8g4_19+f9g3_38;
h[3] = f0g3+f1g2 +f2g1 +f3g0 +f4g9_19+f5g8_19+f6g7_19+f7g6_19+f8g5_19+f9g4_19;
h[4] = f0g4+f1g3_2 +f2g2 +f3g1_2 +f4g0 +f5g9_38+f6g8_19+f7g7_38+f8g6_19+f9g5_38;
h[5] = f0g5+f1g4 +f2g3 +f3g2 +f4g1 +f5g0 +f6g9_19+f7g8_19+f8g7_19+f9g6_19;
h[6] = f0g6+f1g5_2 +f2g4 +f3g3_2 +f4g2 +f5g1_2 +f6g0 +f7g9_38+f8g8_19+f9g7_38;
h[7] = f0g7+f1g6 +f2g5 +f3g4 +f4g3 +f5g2 +f6g1 +f7g0 +f8g9_19+f9g8_19;
h[8] = f0g8+f1g7_2 +f2g6 +f3g5_2 +f4g4 +f5g3_2 +f6g2 +f7g1_2 +f8g0 +f9g9_38;
h[9] = f0g9+f1g8 +f2g7 +f3g6 +f4g5 +f5g4 +f6g3 +f7g2 +f8g1 +f9g0 ;
return h;
}
publicstaticvoidfe_mul(int[] h,int[] f,int[] g)
{
long hr[] = fe_mul1(f, g);
long carry0;
long carry1;
long carry2;
long carry3;
long carry4;
long carry5;
long carry6;
long carry7;
long carry8;
long carry9;
/*
|h0| <= (1.65*1.65*2^52*(1+19+19+19+19)+1.65*1.65*2^50*(38+38+38+38+38))
i.e. |h0| <= 1.4*2^60; narrower ranges for h2, h4, h6, h8
|h1| <= (1.65*1.65*2^51*(1+1+19+19+19+19+19+19+19+19))
i.e. |h1| <= 1.7*2^59; narrower ranges for h3, h5, h7, h9
*/
carry0 = (hr[0] + (long) (1<<25)) >> 26; hr[1] += carry0; hr[0] -= carry0 << 26;
carry4 = (hr[4] + (long) (1<<25)) >> 26; hr[5] += carry4; hr[4] -= carry4 << 26;
/* |h0| <= 2^25 *//* |h4| <= 2^25 *//* |h1| <= 1.71*2^59 *//* |h5| <= 1.71*2^59 */
carry1 = (hr[1] + (long) (1<<24)) >> 25; hr[2] += carry1; hr[1] -= carry1 << 25;
carry5 = (hr[5] + (long) (1<<24)) >> 25; hr[6] += carry5; hr[5] -= carry5 << 25;
/* |h1| <= 2^24; from now on fits into int32 *//* |h5| <= 2^24; from now on fits into int32 *//* |h2| <= 1.41*2^60 *//* |h6| <= 1.41*2^60 */
carry2 = (hr[2] + (long) (1<<25)) >> 26; hr[3] += carry2; hr[2] -= carry2 << 26;
carry6 = (hr[6] + (long) (1<<25)) >> 26; hr[7] += carry6; hr[6] -= carry6 << 26;
/* |h2| <= 2^25; from now on fits into int32 unchanged *//* |h6| <= 2^25; from now on fits into int32 unchanged *//* |h3| <= 1.71*2^59 *//* |h7| <= 1.71*2^59 */
carry3 = (hr[3] + (long) (1<<24)) >> 25; hr[4] += carry3; hr[3] -= carry3 << 25;
carry7 = (hr[7] + (long) (1<<24)) >> 25; hr[8] += carry7; hr[7] -= carry7 << 25;
/* |h3| <= 2^24; from now on fits into int32 unchanged *//* |h7| <= 2^24; from now on fits into int32 unchanged *//* |h4| <= 1.72*2^34 *//* |h8| <= 1.41*2^60 */
carry4 = (hr[4] + (long) (1<<25)) >> 26; hr[5] += carry4; hr[4] -= carry4 << 26;
carry8 = (hr[8] + (long) (1<<25)) >> 26; hr[9] += carry8; hr[8] -= carry8 << 26;
/* |h4| <= 2^25; from now on fits into int32 unchanged *//* |h8| <= 2^25; from now on fits into int32 unchanged *//* |h5| <= 1.01*2^24 *//* |h9| <= 1.71*2^59 */
carry9 = (hr[9] + (long) (1<<24)) >> 25; hr[0] += carry9 * 19; hr[9] -= carry9 << 25;
/* |h9| <= 2^24; from now on fits into int32 unchanged *//* |h0| <= 1.1*2^39 */
carry0 = (hr[0] + (long) (1<<25)) >> 26; hr[1] += carry0; hr[0] -= carry0 << 26;
/* |h0| <= 2^25; from now on fits into int32 unchanged *//* |h1| <= 1.01*2^24 */
h[0] = (int)hr[0];
h[1] = (int)hr[1];
h[2] = (int)hr[2];
h[3] = (int)hr[3];
h[4] = (int)hr[4];
h[5] = (int)hr[5];
h[6] = (int)hr[6];
h[7] = (int)hr[7];
h[8] = (int)hr[8];
h[9] = (int)hr[9];
}
}
Solution 2:
Hey Alex i think this is the solution to your issue. Catching exceptions from a synchronized block fails at run time with the following exception:Rejecting class fr.inra.arttest.MyClass because it failed compile-time verification. So check around any calls to synchronized. Also you can read more about the issue from this google bug post. https://code.google.com/p/android/issues/detail?id=80961.
Hope it helps !
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