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check Rc2EcbEncrypt/Decrypt returns during CBC ops

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This commit is contained in:
Chris Conlon
2020-10-22 09:57:34 -06:00
parent d1f13a6570
commit 5e78a0107d
1 changed files with 11 additions and 2 deletions
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13
wolfcrypt/src/rc2.c
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@@ -282,6 +282,7 @@ int wc_Rc2EcbDecrypt(Rc2* rc2, byte* out, const byte* in, word32 sz)
int wc_Rc2CbcEncrypt(Rc2* rc2, byte* out, const byte* in, word32 sz)
{
int ret;
word32 blocks = (sz / RC2_BLOCK_SIZE);
if (rc2 == NULL || out == NULL || in == NULL) {
@@ -294,7 +295,11 @@ int wc_Rc2CbcEncrypt(Rc2* rc2, byte* out, const byte* in, word32 sz)
while (blocks--) {
xorbuf((byte*)rc2->reg, in, RC2_BLOCK_SIZE);
wc_Rc2EcbEncrypt(rc2, (byte*)rc2->reg, (byte*)rc2->reg, RC2_BLOCK_SIZE);
ret = wc_Rc2EcbEncrypt(rc2, (byte*)rc2->reg, (byte*)rc2->reg,
RC2_BLOCK_SIZE);
if (ret != 0) {
return ret;
}
XMEMCPY(out, rc2->reg, RC2_BLOCK_SIZE);
out += RC2_BLOCK_SIZE;
@@ -306,6 +311,7 @@ int wc_Rc2CbcEncrypt(Rc2* rc2, byte* out, const byte* in, word32 sz)
int wc_Rc2CbcDecrypt(Rc2* rc2, byte* out, const byte* in, word32 sz)
{
int ret;
word32 blocks = (sz / RC2_BLOCK_SIZE);
if (rc2 == NULL || out == NULL || in == NULL) {
@@ -318,7 +324,10 @@ int wc_Rc2CbcDecrypt(Rc2* rc2, byte* out, const byte* in, word32 sz)
while (blocks--) {
XMEMCPY(rc2->tmp, in, RC2_BLOCK_SIZE);
wc_Rc2EcbDecrypt(rc2, out, (byte*)rc2->tmp, RC2_BLOCK_SIZE);
ret = wc_Rc2EcbDecrypt(rc2, out, (byte*)rc2->tmp, RC2_BLOCK_SIZE);
if (ret != 0) {
return ret;
}
xorbuf(out, (byte*)rc2->reg, RC2_BLOCK_SIZE);
/* store iv for next call */
XMEMCPY(rc2->reg, rc2->tmp, RC2_BLOCK_SIZE);