fp_prime_random_ex: make sure call-back function is not NULL

sjaeckel · sjaeckel · commit 3142b0bdfcb1 · 2014-10-13T16:51:13.000+02:00
diff --git a/src/numtheory/fp_prime_random_ex.c b/src/numtheory/fp_prime_random_ex.c
@@ -16,7 +16,7 @@ int fp_prime_random_ex(fp_int *a, int t, int size, int flags, tfm_prime_callback
    int res, err, bsize, maskOR_msb_offset;
 
    /* sanity check the input */
-   if (size <= 1 || t <= 0 || t > FP_PRIME_SIZE) {
+   if (size <= 1 || cb == NULL || t <= 0 || t > FP_PRIME_SIZE) {
       return FP_VAL;
    }
 

Original file line number	Diff line number	Diff line change
`@@ -16,7 +16,7 @@ int fp_prime_random_ex(fp_int *a, int t, int size, int flags, tfm_prime_callback`
`16`	`16`	`int res, err, bsize, maskOR_msb_offset;`
`17`	`17`
`18`	`18`	`/* sanity check the input */`
`19`		`- if (size <= 1 \|\| t <= 0 \|\| t > FP_PRIME_SIZE) {`
	`19`	`+ if (size <= 1 \|\| cb == NULL \|\| t <= 0 \|\| t > FP_PRIME_SIZE) {`
`20`	`20`	`return FP_VAL;`
`21`	`21`	`}`
`22`	`22`