X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/5c72ca6161da0e7976245222c412d62ebae2e386..HEAD:/sshrsag.c

diff --git a/sshrsag.c b/sshrsag.c
index eb714ad6..d754890d 100644
--- a/sshrsag.c
+++ b/sshrsag.c
@@ -2,6 +2,8 @@
  * RSA key generation.
  */
 
+#include <assert.h>
+
 #include "ssh.h"
 
 #define RSA_EXPONENT 37		       /* we like this prime */
@@ -10,6 +12,7 @@ int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn,
 		 void *pfnparam)
 {
     Bignum pm1, qm1, phi_n;
+    unsigned pfirst, qfirst;
 
     /*
      * Set up the phase limits for the progress report. We do this
@@ -59,10 +62,11 @@ int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn,
      * general that's slightly more fiddly to arrange. By choosing
      * a prime e, we can simplify the criterion.)
      */
+    invent_firstbits(&pfirst, &qfirst);
     key->p = primegen(bits / 2, RSA_EXPONENT, 1, NULL,
-		      1, pfn, pfnparam);
+		      1, pfn, pfnparam, pfirst);
     key->q = primegen(bits - bits / 2, RSA_EXPONENT, 1, NULL,
-		      2, pfn, pfnparam);
+		      2, pfn, pfnparam, qfirst);
 
     /*
      * Ensure p > q, by swapping them if not.
@@ -90,8 +94,10 @@ int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn,
     freebn(pm1);
     freebn(qm1);
     key->private_exponent = modinv(key->exponent, phi_n);
+    assert(key->private_exponent);
     pfn(pfnparam, PROGFN_PROGRESS, 3, 4);
     key->iqmp = modinv(key->q, key->p);
+    assert(key->iqmp);
     pfn(pfnparam, PROGFN_PROGRESS, 3, 5);
 
     /*