699 lines
19 KiB
C
699 lines
19 KiB
C
#include "mycrypt.h"
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#ifdef SERPENT
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const struct _cipher_descriptor serpent_desc =
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{
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"serpent",
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5,
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16, 32, 16, 32,
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&serpent_setup,
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&serpent_ecb_encrypt,
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&serpent_ecb_decrypt,
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&serpent_test,
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&serpent_keysize
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};
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/* These defines are derived from Brian Gladman's work. Contact him at gladman@seven77.demon.co.uk
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*
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* Available on the web at http://fp.gladman.plus.com/cryptography_technology/aes/index.htm
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*/
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#define sb0(a,b,c,d,e,f,g,h) \
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t1 = a ^ d; \
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t2 = a & d; \
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t3 = c ^ t1; \
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t6 = b & t1; \
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t4 = b ^ t3; \
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t10 = ~t3; \
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h = t2 ^ t4; \
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t7 = a ^ t6; \
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t14 = ~t7; \
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t8 = c | t7; \
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t11 = t3 ^ t7; \
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g = t4 ^ t8; \
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t12 = h & t11; \
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f = t10 ^ t12; \
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e = t12 ^ t14
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/* 15 terms */
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#define ib0(a,b,c,d,e,f,g,h) \
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t1 = ~a; \
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t2 = a ^ b; \
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t3 = t1 | t2; \
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t4 = d ^ t3; \
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t7 = d & t2; \
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t5 = c ^ t4; \
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t8 = t1 ^ t7; \
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g = t2 ^ t5; \
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t11 = a & t4; \
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t9 = g & t8; \
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t14 = t5 ^ t8; \
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f = t4 ^ t9; \
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t12 = t5 | f; \
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h = t11 ^ t12; \
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e = h ^ t14
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/* 14 terms! */
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#define sb1(a,b,c,d,e,f,g,h) \
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t1 = ~a; \
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t2 = b ^ t1; \
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t3 = a | t2; \
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t4 = d | t2; \
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t5 = c ^ t3; \
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g = d ^ t5; \
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t7 = b ^ t4; \
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t8 = t2 ^ g; \
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t9 = t5 & t7; \
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h = t8 ^ t9; \
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t11 = t5 ^ t7; \
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f = h ^ t11; \
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t13 = t8 & t11; \
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e = t5 ^ t13
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/* 17 terms */
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#define ib1(a,b,c,d,e,f,g,h) \
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t1 = a ^ d; \
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t2 = a & b; \
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t3 = b ^ c; \
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t4 = a ^ t3; \
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t5 = b | d; \
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t7 = c | t1; \
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h = t4 ^ t5; \
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t8 = b ^ t7; \
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t11 = ~t2; \
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t9 = t4 & t8; \
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f = t1 ^ t9; \
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t13 = t9 ^ t11; \
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t12 = h & f; \
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g = t12 ^ t13; \
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t15 = a & d; \
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t16 = c ^ t13; \
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e = t15 ^ t16
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/* 16 terms */
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#define sb2(a,b,c,d,e,f,g,h) \
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t1 = ~a; \
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t2 = b ^ d; \
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t3 = c & t1; \
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t13 = d | t1; \
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e = t2 ^ t3; \
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t5 = c ^ t1; \
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t6 = c ^ e; \
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t7 = b & t6; \
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t10 = e | t5; \
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h = t5 ^ t7; \
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t9 = d | t7; \
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t11 = t9 & t10; \
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t14 = t2 ^ h; \
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g = a ^ t11; \
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t15 = g ^ t13; \
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f = t14 ^ t15
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/* 16 terms */
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#define ib2(a,b,c,d,e,f,g,h) \
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t1 = b ^ d; \
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t2 = ~t1; \
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t3 = a ^ c; \
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t4 = c ^ t1; \
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t7 = a | t2; \
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t5 = b & t4; \
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t8 = d ^ t7; \
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t11 = ~t4; \
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e = t3 ^ t5; \
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t9 = t3 | t8; \
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t14 = d & t11; \
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h = t1 ^ t9; \
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t12 = e | h; \
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f = t11 ^ t12; \
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t15 = t3 ^ t12; \
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g = t14 ^ t15
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/* 17 terms */
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#define sb3(a,b,c,d,e,f,g,h) \
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t1 = a ^ c; \
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t2 = d ^ t1; \
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t3 = a & t2; \
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t4 = d ^ t3; \
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t5 = b & t4; \
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g = t2 ^ t5; \
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t7 = a | g; \
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t8 = b | d; \
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t11 = a | d; \
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t9 = t4 & t7; \
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f = t8 ^ t9; \
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t12 = b ^ t11; \
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t13 = g ^ t9; \
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t15 = t3 ^ t8; \
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h = t12 ^ t13; \
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t16 = c & t15; \
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e = t12 ^ t16
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/* 16 term solution that performs less well than 17 term one
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in my environment (PPro/PII)
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#define sb3(a,b,c,d,e,f,g,h) \
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t1 = a ^ b; \
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t2 = a & c; \
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t3 = a | d; \
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t4 = c ^ d; \
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t5 = t1 & t3; \
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t6 = t2 | t5; \
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g = t4 ^ t6; \
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t8 = b ^ t3; \
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t9 = t6 ^ t8; \
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t10 = t4 & t9; \
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e = t1 ^ t10; \
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t12 = g & e; \
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f = t9 ^ t12; \
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t14 = b | d; \
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t15 = t4 ^ t12; \
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h = t14 ^ t15
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*/
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/* 17 terms */
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#define ib3(a,b,c,d,e,f,g,h) \
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t1 = b ^ c; \
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t2 = b | c; \
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t3 = a ^ c; \
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t7 = a ^ d; \
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t4 = t2 ^ t3; \
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t5 = d | t4; \
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t9 = t2 ^ t7; \
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e = t1 ^ t5; \
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t8 = t1 | t5; \
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t11 = a & t4; \
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g = t8 ^ t9; \
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t12 = e | t9; \
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f = t11 ^ t12; \
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t14 = a & g; \
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t15 = t2 ^ t14; \
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t16 = e & t15; \
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h = t4 ^ t16
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/* 15 terms */
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#define sb4(a,b,c,d,e,f,g,h) \
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t1 = a ^ d; \
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t2 = d & t1; \
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t3 = c ^ t2; \
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t4 = b | t3; \
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h = t1 ^ t4; \
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t6 = ~b; \
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t7 = t1 | t6; \
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e = t3 ^ t7; \
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t9 = a & e; \
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t10 = t1 ^ t6; \
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t11 = t4 & t10; \
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g = t9 ^ t11; \
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t13 = a ^ t3; \
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t14 = t10 & g; \
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f = t13 ^ t14
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/* 17 terms */
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#define ib4(a,b,c,d,e,f,g,h) \
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t1 = c ^ d; \
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t2 = c | d; \
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t3 = b ^ t2; \
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t4 = a & t3; \
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f = t1 ^ t4; \
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t6 = a ^ d; \
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t7 = b | d; \
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t8 = t6 & t7; \
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h = t3 ^ t8; \
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t10 = ~a; \
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t11 = c ^ h; \
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t12 = t10 | t11;\
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e = t3 ^ t12; \
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t14 = c | t4; \
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t15 = t7 ^ t14; \
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t16 = h | t10; \
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g = t15 ^ t16
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/* 16 terms */
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#define sb5(a,b,c,d,e,f,g,h) \
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t1 = ~a; \
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t2 = a ^ b; \
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t3 = a ^ d; \
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t4 = c ^ t1; \
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t5 = t2 | t3; \
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e = t4 ^ t5; \
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t7 = d & e; \
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t8 = t2 ^ e; \
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t10 = t1 | e; \
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f = t7 ^ t8; \
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t11 = t2 | t7; \
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t12 = t3 ^ t10; \
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t14 = b ^ t7; \
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g = t11 ^ t12; \
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t15 = f & t12; \
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h = t14 ^ t15
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/* 16 terms */
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#define ib5(a,b,c,d,e,f,g,h) \
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t1 = ~c; \
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t2 = b & t1; \
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t3 = d ^ t2; \
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t4 = a & t3; \
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t5 = b ^ t1; \
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h = t4 ^ t5; \
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t7 = b | h; \
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t8 = a & t7; \
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f = t3 ^ t8; \
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t10 = a | d; \
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t11 = t1 ^ t7; \
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e = t10 ^ t11; \
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t13 = a ^ c; \
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t14 = b & t10; \
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t15 = t4 | t13; \
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g = t14 ^ t15
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/* 15 terms */
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#define sb6(a,b,c,d,e,f,g,h) \
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t1 = ~a; \
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t2 = a ^ d; \
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t3 = b ^ t2; \
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t4 = t1 | t2; \
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t5 = c ^ t4; \
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f = b ^ t5; \
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t13 = ~t5; \
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t7 = t2 | f; \
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t8 = d ^ t7; \
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t9 = t5 & t8; \
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g = t3 ^ t9; \
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t11 = t5 ^ t8; \
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e = g ^ t11; \
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t14 = t3 & t11; \
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h = t13 ^ t14
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/* 15 terms */
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#define ib6(a,b,c,d,e,f,g,h) \
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t1 = ~a; \
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t2 = a ^ b; \
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t3 = c ^ t2; \
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t4 = c | t1; \
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t5 = d ^ t4; \
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t13 = d & t1; \
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f = t3 ^ t5; \
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t7 = t3 & t5; \
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t8 = t2 ^ t7; \
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t9 = b | t8; \
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h = t5 ^ t9; \
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t11 = b | h; \
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e = t8 ^ t11; \
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t14 = t3 ^ t11; \
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g = t13 ^ t14
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/* 17 terms */
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#define sb7(a,b,c,d,e,f,g,h) \
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t1 = ~c; \
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t2 = b ^ c; \
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t3 = b | t1; \
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t4 = d ^ t3; \
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t5 = a & t4; \
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t7 = a ^ d; \
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h = t2 ^ t5; \
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t8 = b ^ t5; \
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t9 = t2 | t8; \
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t11 = d & t3; \
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f = t7 ^ t9; \
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t12 = t5 ^ f; \
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t15 = t1 | t4; \
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t13 = h & t12; \
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g = t11 ^ t13; \
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t16 = t12 ^ g; \
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e = t15 ^ t16
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/* 17 terms */
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#define ib7(a,b,c,d,e,f,g,h) \
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t1 = a & b; \
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t2 = a | b; \
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t3 = c | t1; \
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t4 = d & t2; \
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h = t3 ^ t4; \
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t6 = ~d; \
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t7 = b ^ t4; \
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t8 = h ^ t6; \
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t11 = c ^ t7; \
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t9 = t7 | t8; \
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f = a ^ t9; \
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t12 = d | f; \
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e = t11 ^ t12; \
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t14 = a & h; \
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t15 = t3 ^ f; \
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t16 = e ^ t14; \
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g = t15 ^ t16
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#define k_xor(r,a,b,c,d) \
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a ^= skey->serpent.K[4 * (r) + 0]; \
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b ^= skey->serpent.K[4 * (r) + 1]; \
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c ^= skey->serpent.K[4 * (r) + 2]; \
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d ^= skey->serpent.K[4 * (r) + 3]
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#define k_set(r,a,b,c,d) \
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a = lkey[4 * (r) + 8]; \
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b = lkey[4 * (r) + 9]; \
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c = lkey[4 * (r) + 10]; \
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d = lkey[4 * (r) + 11]
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#define k_get(r,a,b,c,d) \
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skey->serpent.K[4 * (r) + 0] = a; \
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skey->serpent.K[4 * (r) + 1] = b; \
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skey->serpent.K[4 * (r) + 2] = c; \
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skey->serpent.K[4 * (r) + 3] = d
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/* the linear transformation and its inverse */
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#define rot(a,b,c,d) \
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a = ROL(a, 13); \
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c = ROL(c, 3); \
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d ^= c ^ (a << 3); \
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b ^= a ^ c; \
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d = ROL(d, 7); \
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b = ROL(b, 1); \
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a ^= b ^ d; \
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c ^= d ^ (b << 7); \
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a = ROL(a, 5); \
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c = ROL(c, 22)
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#define irot(a,b,c,d) \
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c = ROR(c, 22); \
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a = ROR(a, 5); \
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c ^= d ^ (b << 7); \
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a ^= b ^ d; \
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d = ROR(d, 7); \
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b = ROR(b, 1); \
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d ^= c ^ (a << 3); \
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b ^= a ^ c; \
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c = ROR(c, 3); \
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a = ROR(a, 13)
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#ifdef CLEAN_STACK
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static int _serpent_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey)
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#else
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int serpent_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey)
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#endif
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{
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unsigned long lkey[140], t, a, b, c, d, e, f, g, h, x;
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unsigned long t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12,t13,t14,t15,t16;
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unsigned char buf[32];
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_ARGCHK(key != NULL);
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_ARGCHK(skey != NULL);
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/* check rounds */
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if (num_rounds != 0 && num_rounds != 32) {
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return CRYPT_INVALID_ROUNDS;
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}
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/* check keylen */
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if (keylen < 16 || keylen > 32) {
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return CRYPT_INVALID_KEYSIZE;
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}
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/* copy key and expand to 32bytes as required */
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for (x = 0; x < (unsigned long)keylen; x++) {
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buf[x] = key[x];
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}
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if (x < 32) {
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buf[x++] = 0x01;
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while (x < 32) {
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buf[x++] = 0;
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}
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}
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/* copy key into 32-bit words */
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for (x = 0; x < 8; x++) {
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LOAD32L(lkey[x], &buf[x*4]);
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}
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/* expand using the LFSR to 140 words */
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for (x = 0; x < 132; x++) {
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t = lkey[x] ^ lkey[x+3] ^ lkey[x+5] ^ lkey[x+7] ^ x ^ 0x9E3779B9UL;
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lkey[x + 8] = ROL(t, 11);
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}
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/* perform the substituions */
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for (x = 0; x < 32; ) {
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k_set( x,a,b,c,d);sb3(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
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k_set( x,a,b,c,d);sb2(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
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k_set( x,a,b,c,d);sb1(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
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k_set( x,a,b,c,d);sb0(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
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k_set( x,a,b,c,d);sb7(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
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k_set( x,a,b,c,d);sb6(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
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k_set( x,a,b,c,d);sb5(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
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k_set( x,a,b,c,d);sb4(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
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}
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k_set(32,a,b,c,d);sb3(a,b,c,d,e,f,g,h);k_get(32,e,f,g,h);
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return CRYPT_OK;
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}
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#ifdef CLEAN_STACK
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int serpent_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey)
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{
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int x;
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x = _serpent_setup(key, keylen, num_rounds, skey);
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burn_stack(sizeof(unsigned long)*166 + sizeof(unsigned char)*32);
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return x;
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}
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#endif
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#ifdef CLEAN_STACK
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static void _serpent_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey)
|
|
#else
|
|
void serpent_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey)
|
|
#endif
|
|
{
|
|
unsigned long a,b,c,d,e,f,g,h;
|
|
unsigned long t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12,t13,t14,t15,t16;
|
|
|
|
_ARGCHK(pt != NULL);
|
|
_ARGCHK(ct != NULL);
|
|
_ARGCHK(skey != NULL);
|
|
|
|
LOAD32L(a, &pt[0]);LOAD32L(b, &pt[4]);LOAD32L(c, &pt[8]);LOAD32L(d, &pt[12]);
|
|
k_xor( 0,a,b,c,d); sb0(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor( 1,e,f,g,h); sb1(e,f,g,h,a,b,c,d); rot(a,b,c,d);
|
|
k_xor( 2,a,b,c,d); sb2(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor( 3,e,f,g,h); sb3(e,f,g,h,a,b,c,d); rot(a,b,c,d);
|
|
k_xor( 4,a,b,c,d); sb4(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor( 5,e,f,g,h); sb5(e,f,g,h,a,b,c,d); rot(a,b,c,d);
|
|
k_xor( 6,a,b,c,d); sb6(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor( 7,e,f,g,h); sb7(e,f,g,h,a,b,c,d); rot(a,b,c,d);
|
|
k_xor( 8,a,b,c,d); sb0(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor( 9,e,f,g,h); sb1(e,f,g,h,a,b,c,d); rot(a,b,c,d);
|
|
k_xor(10,a,b,c,d); sb2(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor(11,e,f,g,h); sb3(e,f,g,h,a,b,c,d); rot(a,b,c,d);
|
|
k_xor(12,a,b,c,d); sb4(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor(13,e,f,g,h); sb5(e,f,g,h,a,b,c,d); rot(a,b,c,d);
|
|
k_xor(14,a,b,c,d); sb6(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor(15,e,f,g,h); sb7(e,f,g,h,a,b,c,d); rot(a,b,c,d);
|
|
k_xor(16,a,b,c,d); sb0(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor(17,e,f,g,h); sb1(e,f,g,h,a,b,c,d); rot(a,b,c,d);
|
|
k_xor(18,a,b,c,d); sb2(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor(19,e,f,g,h); sb3(e,f,g,h,a,b,c,d); rot(a,b,c,d);
|
|
k_xor(20,a,b,c,d); sb4(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor(21,e,f,g,h); sb5(e,f,g,h,a,b,c,d); rot(a,b,c,d);
|
|
k_xor(22,a,b,c,d); sb6(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor(23,e,f,g,h); sb7(e,f,g,h,a,b,c,d); rot(a,b,c,d);
|
|
k_xor(24,a,b,c,d); sb0(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor(25,e,f,g,h); sb1(e,f,g,h,a,b,c,d); rot(a,b,c,d);
|
|
k_xor(26,a,b,c,d); sb2(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor(27,e,f,g,h); sb3(e,f,g,h,a,b,c,d); rot(a,b,c,d);
|
|
k_xor(28,a,b,c,d); sb4(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor(29,e,f,g,h); sb5(e,f,g,h,a,b,c,d); rot(a,b,c,d);
|
|
k_xor(30,a,b,c,d); sb6(a,b,c,d,e,f,g,h); rot(e,f,g,h);
|
|
k_xor(31,e,f,g,h); sb7(e,f,g,h,a,b,c,d); k_xor(32,a,b,c,d);
|
|
STORE32L(a, &ct[0]);STORE32L(b, &ct[4]);STORE32L(c, &ct[8]);STORE32L(d, &ct[12]);
|
|
}
|
|
|
|
#ifdef CLEAN_STACK
|
|
void serpent_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey)
|
|
{
|
|
_serpent_ecb_encrypt(pt, ct, skey);
|
|
burn_stack(sizeof(unsigned long)*24);
|
|
}
|
|
#endif
|
|
|
|
#ifdef CLEAN_STACK
|
|
static void _serpent_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey)
|
|
#else
|
|
void serpent_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey)
|
|
#endif
|
|
{
|
|
unsigned long a,b,c,d,e,f,g,h;
|
|
unsigned long t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12,t13,t14,t15,t16;
|
|
|
|
_ARGCHK(pt != NULL);
|
|
_ARGCHK(ct != NULL);
|
|
_ARGCHK(skey != NULL);
|
|
|
|
LOAD32L(a, &ct[0]);LOAD32L(b, &ct[4]);LOAD32L(c, &ct[8]);LOAD32L(d, &ct[12]);
|
|
k_xor(32,a,b,c,d); ib7(a,b,c,d,e,f,g,h); k_xor(31,e,f,g,h);
|
|
irot(e,f,g,h); ib6(e,f,g,h,a,b,c,d); k_xor(30,a,b,c,d);
|
|
irot(a,b,c,d); ib5(a,b,c,d,e,f,g,h); k_xor(29,e,f,g,h);
|
|
irot(e,f,g,h); ib4(e,f,g,h,a,b,c,d); k_xor(28,a,b,c,d);
|
|
irot(a,b,c,d); ib3(a,b,c,d,e,f,g,h); k_xor(27,e,f,g,h);
|
|
irot(e,f,g,h); ib2(e,f,g,h,a,b,c,d); k_xor(26,a,b,c,d);
|
|
irot(a,b,c,d); ib1(a,b,c,d,e,f,g,h); k_xor(25,e,f,g,h);
|
|
irot(e,f,g,h); ib0(e,f,g,h,a,b,c,d); k_xor(24,a,b,c,d);
|
|
irot(a,b,c,d); ib7(a,b,c,d,e,f,g,h); k_xor(23,e,f,g,h);
|
|
irot(e,f,g,h); ib6(e,f,g,h,a,b,c,d); k_xor(22,a,b,c,d);
|
|
irot(a,b,c,d); ib5(a,b,c,d,e,f,g,h); k_xor(21,e,f,g,h);
|
|
irot(e,f,g,h); ib4(e,f,g,h,a,b,c,d); k_xor(20,a,b,c,d);
|
|
irot(a,b,c,d); ib3(a,b,c,d,e,f,g,h); k_xor(19,e,f,g,h);
|
|
irot(e,f,g,h); ib2(e,f,g,h,a,b,c,d); k_xor(18,a,b,c,d);
|
|
irot(a,b,c,d); ib1(a,b,c,d,e,f,g,h); k_xor(17,e,f,g,h);
|
|
irot(e,f,g,h); ib0(e,f,g,h,a,b,c,d); k_xor(16,a,b,c,d);
|
|
irot(a,b,c,d); ib7(a,b,c,d,e,f,g,h); k_xor(15,e,f,g,h);
|
|
irot(e,f,g,h); ib6(e,f,g,h,a,b,c,d); k_xor(14,a,b,c,d);
|
|
irot(a,b,c,d); ib5(a,b,c,d,e,f,g,h); k_xor(13,e,f,g,h);
|
|
irot(e,f,g,h); ib4(e,f,g,h,a,b,c,d); k_xor(12,a,b,c,d);
|
|
irot(a,b,c,d); ib3(a,b,c,d,e,f,g,h); k_xor(11,e,f,g,h);
|
|
irot(e,f,g,h); ib2(e,f,g,h,a,b,c,d); k_xor(10,a,b,c,d);
|
|
irot(a,b,c,d); ib1(a,b,c,d,e,f,g,h); k_xor( 9,e,f,g,h);
|
|
irot(e,f,g,h); ib0(e,f,g,h,a,b,c,d); k_xor( 8,a,b,c,d);
|
|
irot(a,b,c,d); ib7(a,b,c,d,e,f,g,h); k_xor( 7,e,f,g,h);
|
|
irot(e,f,g,h); ib6(e,f,g,h,a,b,c,d); k_xor( 6,a,b,c,d);
|
|
irot(a,b,c,d); ib5(a,b,c,d,e,f,g,h); k_xor( 5,e,f,g,h);
|
|
irot(e,f,g,h); ib4(e,f,g,h,a,b,c,d); k_xor( 4,a,b,c,d);
|
|
irot(a,b,c,d); ib3(a,b,c,d,e,f,g,h); k_xor( 3,e,f,g,h);
|
|
irot(e,f,g,h); ib2(e,f,g,h,a,b,c,d); k_xor( 2,a,b,c,d);
|
|
irot(a,b,c,d); ib1(a,b,c,d,e,f,g,h); k_xor( 1,e,f,g,h);
|
|
irot(e,f,g,h); ib0(e,f,g,h,a,b,c,d); k_xor( 0,a,b,c,d);
|
|
STORE32L(a, &pt[0]);STORE32L(b, &pt[4]);STORE32L(c, &pt[8]);STORE32L(d, &pt[12]);
|
|
}
|
|
|
|
#ifdef CLEAN_STACK
|
|
void serpent_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey)
|
|
{
|
|
_serpent_ecb_decrypt(ct, pt, skey);
|
|
burn_stack(sizeof(unsigned long)*24);
|
|
}
|
|
#endif
|
|
|
|
int serpent_test(void)
|
|
{
|
|
static const struct {
|
|
int keylen;
|
|
unsigned char key[32], pt[16], ct[16];
|
|
} tests[] = {
|
|
{
|
|
16,
|
|
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
|
|
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
|
|
{ 0xdd, 0xd2, 0x6b, 0x98, 0xa5, 0xff, 0xd8, 0x2c,
|
|
0x05, 0x34, 0x5a, 0x9d, 0xad, 0xbf, 0xaf, 0x49 }
|
|
},
|
|
{
|
|
16,
|
|
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
|
|
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80 },
|
|
{ 0x4a, 0xe9, 0xa2, 0x0b, 0x2b, 0x14, 0xa1, 0x02,
|
|
0x90, 0xcb, 0xb8, 0x20, 0xb7, 0xff, 0xb5, 0x10 }
|
|
},
|
|
{
|
|
24,
|
|
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
|
|
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08 },
|
|
{ 0xe1, 0x1b, 0x01, 0x52, 0x4e, 0xa1, 0xf4, 0x65,
|
|
0xa2, 0xa2, 0x00, 0x43, 0xeb, 0x9f, 0x7e, 0x8a }
|
|
},
|
|
{
|
|
32,
|
|
{ 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
|
|
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
|
|
{ 0xe0, 0x88, 0x5d, 0x44, 0x60, 0x37, 0x34, 0x69,
|
|
0xd1, 0xfa, 0x6c, 0x36, 0xa6, 0xe1, 0xc5, 0x2f }
|
|
},
|
|
{
|
|
32,
|
|
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
|
|
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
|
|
{ 0x17, 0xc6, 0x25, 0x8e, 0x60, 0x09, 0xe2, 0x82,
|
|
0x66, 0x18, 0x69, 0xd5, 0x25, 0xf7, 0xd2, 0x04 }
|
|
},
|
|
{
|
|
32,
|
|
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
|
|
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
|
|
{ 0x9f, 0xe1, 0x43, 0x25, 0x0d, 0x00, 0xe2, 0x56,
|
|
0x96, 0xb0, 0x1e, 0x0a, 0x2e, 0xd0, 0x5d, 0xb3 }
|
|
}
|
|
};
|
|
|
|
unsigned char buf[2][16];
|
|
int x, errno;
|
|
symmetric_key key;
|
|
|
|
for (x = 0; x < (int)(sizeof(tests) / sizeof(tests[0])); x++) {
|
|
/* setup key */
|
|
if ((errno = serpent_setup(tests[x].key, tests[x].keylen, 0, &key))!= CRYPT_OK) {
|
|
return errno;
|
|
}
|
|
|
|
/* encrypt and decrypt */
|
|
serpent_ecb_encrypt(tests[x].pt, buf[0], &key);
|
|
serpent_ecb_decrypt(buf[0], buf[1], &key);
|
|
|
|
/* compare */
|
|
if (memcmp(buf[0], tests[x].ct, 16) || memcmp(buf[1], tests[x].pt, 16)) {
|
|
return CRYPT_FAIL_TESTVECTOR;
|
|
}
|
|
}
|
|
return CRYPT_OK;
|
|
}
|
|
|
|
int serpent_keysize(int *desired_keysize)
|
|
{
|
|
_ARGCHK(desired_keysize != NULL);
|
|
|
|
if (*desired_keysize < 16)
|
|
return CRYPT_INVALID_KEYSIZE;
|
|
if (*desired_keysize > 32)
|
|
*desired_keysize = 32;
|
|
return CRYPT_OK;
|
|
}
|
|
|
|
#endif
|
|
|
|
|