openssl/crypto/asn1/x_bignum.c - Issue 2072073002: Delete bundled copy of OpenSSL and replace with README.

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Issue 2072073002: Delete bundled copy of OpenSSL and replace with README. (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master

Patch Set: Delete bundled copy of OpenSSL and replace with README. Created 4 years, 6 months ago

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1 /* x_bignum.c */

2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL

3 * project 2000.

4 */

5 /* ====================================================================

6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.

7 *

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

9 * modification, are permitted provided that the following conditions

10 * are met:

11 *

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

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

14 *

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

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

17 * the documentation and/or other materials provided with the

18 * distribution.

19 *

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

21 * software must display the following acknowledgment:

22 * "This product includes software developed by the OpenSSL Project

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

24 *

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

26 * endorse or promote products derived from this software without

27 * prior written permission. For written permission, please contact

28 * licensing@OpenSSL.org.

29 *

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

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

32 * permission of the OpenSSL Project.

33 *

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

35 * acknowledgment:

36 * "This product includes software developed by the OpenSSL Project

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

38 *

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

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

41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

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

43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

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

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

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

48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

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

50 * OF THE POSSIBILITY OF SUCH DAMAGE.

51 * ====================================================================

52 *

53 * This product includes cryptographic software written by Eric Young

54 * (eay@cryptsoft.com). This product includes software written by Tim

55 * Hudson (tjh@cryptsoft.com).

56 *

57 */

58

59 #include <stdio.h>

60 #include "cryptlib.h"

61 #include <openssl/asn1t.h>

62 #include <openssl/bn.h>

63

64 /* Custom primitive type for BIGNUM handling. This reads in an ASN1_INTEGER as a

65 * BIGNUM directly. Currently it ignores the sign which isn't a problem since al l

66 * BIGNUMs used are non negative and anything that looks negative is normally du e

67 * to an encoding error.

68 */

69

70 #define BN_SENSITIVE 1

71

72 static int bn_new(ASN1_VALUE *pval, const ASN1_ITEM it);

73 static void bn_free(ASN1_VALUE *pval, const ASN1_ITEM it);

74

75 static int bn_i2c(ASN1_VALUE *pval, unsigned char cont, int putype, const ASN 1_ITEM it);

76 static int bn_c2i(ASN1_VALUE *pval, const unsigned char cont, int len, int uty pe, char free_cont, const ASN1_ITEM it);

77

78 static ASN1_PRIMITIVE_FUNCS bignum_pf = {

79 NULL, 0,

80 bn_new,

81 bn_free,

82 0,

83 bn_c2i,

84 bn_i2c

85 };

86

87 ASN1_ITEM_start(BIGNUM)

88 ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &bignum_pf, 0, "BIGNUM"

89 ASN1_ITEM_end(BIGNUM)

90

91 ASN1_ITEM_start(CBIGNUM)

92 ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &bignum_pf, BN_SENSITIVE, "BIGNUM"

93 ASN1_ITEM_end(CBIGNUM)

94

95 static int bn_new(ASN1_VALUE *pval, const ASN1_ITEM it)

96 {

97 pval = (ASN1_VALUE )BN_new();

98 if(*pval) return 1;

99 else return 0;

100 }

101

102 static void bn_free(ASN1_VALUE *pval, const ASN1_ITEM it)

103 {

104 if(!*pval) return;

105 if(it->size & BN_SENSITIVE) BN_clear_free((BIGNUM )pval);

106 else BN_free((BIGNUM )pval);

107 *pval = NULL;

108 }

109

110 static int bn_i2c(ASN1_VALUE *pval, unsigned char cont, int putype, const ASN 1_ITEM it)

111 {

112 BIGNUM *bn;

113 int pad;

114 if(!*pval) return -1;

115 bn = (BIGNUM )pval;

116 /* If MSB set in an octet we need a padding byte */

117 if(BN_num_bits(bn) & 0x7) pad = 0;

118 else pad = 1;

119 if(cont) {

120 if(pad) *cont++ = 0;

121 BN_bn2bin(bn, cont);

122 }

123 return pad + BN_num_bytes(bn);

124 }

125

126 static int bn_c2i(ASN1_VALUE *pval, const unsigned char cont, int len,

127 int utype, char free_cont, const ASN1_ITEM it)

128 {

129 BIGNUM *bn;

130 if(!*pval) bn_new(pval, it);

131 bn = (BIGNUM )pval;

132 if(!BN_bin2bn(cont, len, bn)) {

133 bn_free(pval, it);

134 return 0;

135 }

136 return 1;

137 }

138

139

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