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Rather silly byte-string / word-string transformations in RSA key

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handling were failing when the key had an odd number of bytes. A
server with an 850-bit key was suffering connection failures as a
result. Now fixed.

[originally from svn r426]
This commit is contained in:
Simon Tatham 2000-03-24 11:46:39 +00:00
parent 9922072a8d
commit d39f735b23
1 changed files with 11 additions and 11 deletions
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22
sshrsa.c
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@ -264,12 +264,12 @@ int makekey(unsigned char *data, struct RSAKey *result,
for (i=1; i<=w; i++) for (i=1; i<=w; i++)
bn[j][i] = 0; bn[j][i] = 0;
for (i=0; i<b; i++) { for (i=b; i-- ;) {
unsigned char byte = *p++; unsigned char byte = *p++;
if ((b-i) & 1) if (i & 1)
bn[j][w-i/2] |= byte; bn[j][1+i/2] |= byte<<8;
else else
bn[j][w-i/2] |= byte<<8; bn[j][1+i/2] |= byte;
} }
debug(bn[j]); debug(bn[j]);
@ -308,12 +308,12 @@ void rsaencrypt(unsigned char *data, int length, struct RSAKey *key) {
p = data; p = data;
for (i=1; i<=w; i++) for (i=1; i<=w; i++)
b1[i] = 0; b1[i] = 0;
for (i=0; i<key->bytes; i++) { for (i=key->bytes; i-- ;) {
unsigned char byte = *p++; unsigned char byte = *p++;
if ((key->bytes-i) & 1) if (i & 1)
b1[w-i/2] |= byte; b1[1+i/2] |= byte<<8;
else else
b1[w-i/2] |= byte<<8; b1[1+i/2] |= byte;
} }
debug(b1); debug(b1);
@ -323,12 +323,12 @@ void rsaencrypt(unsigned char *data, int length, struct RSAKey *key) {
debug(b2); debug(b2);
p = data; p = data;
for (i=0; i<key->bytes; i++) { for (i=key->bytes; i-- ;) {
unsigned char b; unsigned char b;
if (i & 1) if (i & 1)
b = b2[w-i/2] & 0xFF; b = b2[1+i/2] >> 8;
else else
b = b2[w-i/2] >> 8; b = b2[1+i/2] & 0xFF;
*p++ = b; *p++ = b;
} }