Add DES_set_odd_parity.
Because NTLM authentication is still a thing.
Change-Id: I3308a8431c82f0b614e09ce3e5efac1526881f1e
Reviewed-on: https://boringssl-review.googlesource.com/3723
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/crypto/des/des.c b/crypto/des/des.c
index 6d00011..6777de2 100644
--- a/crypto/des/des.c
+++ b/crypto/des/des.c
@@ -349,6 +349,35 @@
}
}
+static const uint8_t kOddParity[256] = {
+ 1, 1, 2, 2, 4, 4, 7, 7, 8, 8, 11, 11, 13, 13, 14,
+ 14, 16, 16, 19, 19, 21, 21, 22, 22, 25, 25, 26, 26, 28, 28,
+ 31, 31, 32, 32, 35, 35, 37, 37, 38, 38, 41, 41, 42, 42, 44,
+ 44, 47, 47, 49, 49, 50, 50, 52, 52, 55, 55, 56, 56, 59, 59,
+ 61, 61, 62, 62, 64, 64, 67, 67, 69, 69, 70, 70, 73, 73, 74,
+ 74, 76, 76, 79, 79, 81, 81, 82, 82, 84, 84, 87, 87, 88, 88,
+ 91, 91, 93, 93, 94, 94, 97, 97, 98, 98, 100, 100, 103, 103, 104,
+ 104, 107, 107, 109, 109, 110, 110, 112, 112, 115, 115, 117, 117, 118, 118,
+ 121, 121, 122, 122, 124, 124, 127, 127, 128, 128, 131, 131, 133, 133, 134,
+ 134, 137, 137, 138, 138, 140, 140, 143, 143, 145, 145, 146, 146, 148, 148,
+ 151, 151, 152, 152, 155, 155, 157, 157, 158, 158, 161, 161, 162, 162, 164,
+ 164, 167, 167, 168, 168, 171, 171, 173, 173, 174, 174, 176, 176, 179, 179,
+ 181, 181, 182, 182, 185, 185, 186, 186, 188, 188, 191, 191, 193, 193, 194,
+ 194, 196, 196, 199, 199, 200, 200, 203, 203, 205, 205, 206, 206, 208, 208,
+ 211, 211, 213, 213, 214, 214, 217, 217, 218, 218, 220, 220, 223, 223, 224,
+ 224, 227, 227, 229, 229, 230, 230, 233, 233, 234, 234, 236, 236, 239, 239,
+ 241, 241, 242, 242, 244, 244, 247, 247, 248, 248, 251, 251, 253, 253, 254,
+ 254
+};
+
+void DES_set_odd_parity(DES_cblock *key) {
+ unsigned i;
+
+ for (i = 0; i < DES_KEY_SZ; i++) {
+ key->bytes[i] = kOddParity[key->bytes[i]];
+ }
+}
+
static void DES_encrypt1(uint32_t *data, const DES_key_schedule *ks, int enc) {
uint32_t l, r, t, u;
const uint32_t *s;
diff --git a/include/openssl/des.h b/include/openssl/des.h
index 1f0dbad..9418846 100644
--- a/include/openssl/des.h
+++ b/include/openssl/des.h
@@ -94,6 +94,10 @@
OPENSSL_EXPORT void DES_set_key(const DES_cblock *key,
DES_key_schedule *schedule);
+/* DES_set_odd_parity sets the parity bits (the least-significant bits in each
+ * byte) of |key| given the other bits in each byte. */
+OPENSSL_EXPORT void DES_set_odd_parity(DES_cblock *key);
+
/* DES_ecb_encrypt encrypts (or decrypts, if |is_encrypt| is |DES_DECRYPT|) a
* single DES block (8 bytes) from in to out, using the key configured in
* |schedule|. */
