Function report |
Source Code:lib\crypto\des.c |
Create Date:2022-07-28 06:47:16 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name:Encryption key expansion* RFC2451: Weak key checks SHOULD be performed.* FIPS 74:* Keys having duals are keys which produce all zeros, all ones, or* alternating zero-one patterns in the C and D registers after Permuted* Choice 1 has operated on the key.
Proto:static unsigned long des_ekey(u32 *pe, const u8 *k)
Type:unsigned long
Parameter:
Type | Parameter | Name |
---|---|---|
u32 * | pe | |
const u8 * | k |
629 | d &= 0x0e |
629 | d <<= 4 |
629 | d = Lookup tables for key expansion [d] |
630 | c &= 0x0e |
630 | c <<= 4 |
630 | c = Lookup tables for key expansion [c] |
631 | b &= 0x0e |
631 | b <<= 4 |
631 | b = Lookup tables for key expansion [b] |
632 | a &= 0x0e |
632 | a <<= 4 |
632 | a = Lookup tables for key expansion [a] |
655 | pt += 512 |
657 | d &= 0xe0 |
657 | d >>= 4 |
657 | d = Lookup tables for key expansion [d + 1] |
658 | c &= 0xe0 |
658 | c >>= 4 |
658 | c = Lookup tables for key expansion [c + 1] |
659 | b &= 0xe0 |
659 | b >>= 4 |
659 | b = Lookup tables for key expansion [b + 1] |
660 | a &= 0xe0 |
660 | a >>= 4 |
660 | a = Lookup tables for key expansion [a + 1] |
687 | c &= 0xffff0000 |
696 | Return w |
Name | Describe |
---|---|
des_expand_key | |
des3_ede_expand_key |
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