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gost89_keywrap.c

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/home/opencoverage/opencoverage/guest-scripts/libressl/src/crypto/gost/gost89_keywrap.c

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1 /* $OpenBSD: gost89_keywrap.c,v 1.3 2014/11/09 19:28:44 miod Exp $ */ -

2 /* -

5 * -

6 * Redistribution and use in source and binary forms, with or without -

7 * modification, are permitted provided that the following conditions -

8 * are met: -

9 * -

10 * 1. Redistributions of source code must retain the above copyright -

11 * notice, this list of conditions and the following disclaimer. -

12 * -

13 * 2. Redistributions in binary form must reproduce the above copyright -

14 * notice, this list of conditions and the following disclaimer in -

15 * the documentation and/or other materials provided with the -

16 * distribution. -

17 * -

18 * 3. All advertising materials mentioning features or use of this -

19 * software must display the following acknowledgment: -

20 * "This product includes software developed by the OpenSSL Project -

21 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" -

22 * -

23 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to -

24 * endorse or promote products derived from this software without -

25 * prior written permission. For written permission, please contact -

26 * openssl-core@openssl.org. -

27 * -

28 * 5. Products derived from this software may not be called "OpenSSL" -

29 * nor may "OpenSSL" appear in their names without prior written -

30 * permission of the OpenSSL Project. -

31 * -

32 * 6. Redistributions of any form whatsoever must retain the following -

33 * acknowledgment: -

34 * "This product includes software developed by the OpenSSL Project -

35 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" -

36 * -

37 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY -

38 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -

39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR -

40 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR -

41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -

42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT -

43 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -

44 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -

45 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, -

46 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -

47 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED -

48 * OF THE POSSIBILITY OF SUCH DAMAGE. -

49 * ==================================================================== -

50 */ -

51 -

52 #include <string.h> -

53 -

54 #include <openssl/opensslconf.h> -

55 -

56 #ifndef OPENSSL_NO_GOST -

57 -

58 #include <openssl/gost.h> -

59 -

60 #include "gost_locl.h" -

61 -

62 static void -

63 key_diversify_crypto_pro(GOST2814789_KEY *ctx, const unsigned char *inputKey, -

64 const unsigned char *ukm, unsigned char *outputKey) -

65 { -

66 unsigned long k, s1, s2; -

67 int i, mask; -

68 unsigned char S[8]; -

69 unsigned char *p; -

70 -

71 memcpy(outputKey, inputKey, 32); -

for (i = 0; i < 8; i++) {

i < 8	Description
TRUE	never evaluated
FALSE	never evaluated

73 /* Make array of integers from key */ -

74 /* Compute IV S */ -

75 s1 = 0, s2 = 0; -

76 p = outputKey; -

for (mask = 1; mask < 256; mask <<= 1) {

mask < 256	Description
TRUE	never evaluated
FALSE	never evaluated

78 c2l(p, k); -

if (mask & ukm[i]) {

mask & ukm[i]	Description
TRUE	never evaluated
FALSE	never evaluated

80 s1 += k; -

} else {

never executed: end of block

82 s2 += k; -

}

never executed: end of block

84 } -

85 p = S; -

86 l2c (s1, p); -

87 l2c (s2, p); -

88 Gost2814789_set_key(ctx, outputKey, 256); -

89 mask = 0; -

90 Gost2814789_cfb64_encrypt(outputKey, outputKey, 32, ctx, S, -

91 &mask, 1); -

}

never executed: end of block

}

never executed: end of block

94 -

95 int -

96 gost_key_wrap_crypto_pro(int nid, const unsigned char *keyExchangeKey, -

97 const unsigned char *ukm, const unsigned char *sessionKey, -

98 unsigned char *wrappedKey) -

99 { -

100 GOST2814789_KEY ctx; -

101 unsigned char kek_ukm[32]; -

102 -

103 Gost2814789_set_sbox(&ctx, nid); -

104 key_diversify_crypto_pro(&ctx, keyExchangeKey, ukm, kek_ukm); -

105 Gost2814789_set_key(&ctx, kek_ukm, 256); -

106 memcpy(wrappedKey, ukm, 8); -

107 Gost2814789_encrypt(sessionKey + 0, wrappedKey + 8 + 0, &ctx); -

108 Gost2814789_encrypt(sessionKey + 8, wrappedKey + 8 + 8, &ctx); -

109 Gost2814789_encrypt(sessionKey + 16, wrappedKey + 8 + 16, &ctx); -

110 Gost2814789_encrypt(sessionKey + 24, wrappedKey + 8 + 24, &ctx); -

111 GOST2814789IMIT(sessionKey, 32, wrappedKey + 40, nid, kek_ukm, ukm); -

112

return 1;

never executed: return 1;

113 } -

114 -

115 int -

116 gost_key_unwrap_crypto_pro(int nid, const unsigned char *keyExchangeKey, -

117 const unsigned char *wrappedKey, unsigned char *sessionKey) -

118 { -

119 unsigned char kek_ukm[32], cek_mac[4]; -

120 GOST2814789_KEY ctx; -

121 -

122 Gost2814789_set_sbox(&ctx, nid); -

123 /* First 8 bytes of wrapped Key is ukm */ -

124 key_diversify_crypto_pro(&ctx, keyExchangeKey, wrappedKey, kek_ukm); -

125 Gost2814789_set_key(&ctx, kek_ukm, 256); -

126 Gost2814789_decrypt(wrappedKey + 8 + 0, sessionKey + 0, &ctx); -

127 Gost2814789_decrypt(wrappedKey + 8 + 8, sessionKey + 8, &ctx); -

128 Gost2814789_decrypt(wrappedKey + 8 + 16, sessionKey + 16, &ctx); -

129 Gost2814789_decrypt(wrappedKey + 8 + 24, sessionKey + 24, &ctx); -

130 -

131 GOST2814789IMIT(sessionKey, 32, cek_mac, nid, kek_ukm, wrappedKey); -

132

if (memcmp(cek_mac, wrappedKey + 40, 4))

memcmp(cek_mac...edKey + 40, 4)	Description
TRUE	never evaluated
FALSE	never evaluated

133

return 0;

never executed: return 0;

134 -

135

return 1;

never executed: return 1;

136 } -

137 -

138 #endif -

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