openssl/crypto/rsa/rsa_pk1.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 /* crypto/rsa/rsa_pk1.c */

2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

3 * All rights reserved.

4 *

5 * This package is an SSL implementation written

6 * by Eric Young (eay@cryptsoft.com).

7 * The implementation was written so as to conform with Netscapes SSL.

8 *

9 * This library is free for commercial and non-commercial use as long as

10 * the following conditions are aheared to. The following conditions

11 * apply to all code found in this distribution, be it the RC4, RSA,

12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation

13 * included with this distribution is covered by the same copyright terms

14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

15 *

16 * Copyright remains Eric Young's, and as such any Copyright notices in

17 * the code are not to be removed.

18 * If this package is used in a product, Eric Young should be given attribution

19 * as the author of the parts of the library used.

20 * This can be in the form of a textual message at program startup or

21 * in documentation (online or textual) provided with the package.

22 *

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

24 * modification, are permitted provided that the following conditions

25 * are met:

26 * 1. Redistributions of source code must retain the copyright

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

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

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

30 * documentation and/or other materials provided with the distribution.

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

32 * must display the following acknowledgement:

33 * "This product includes cryptographic software written by

34 * Eric Young (eay@cryptsoft.com)"

35 * The word 'cryptographic' can be left out if the rouines from the library

36 * being used are not cryptographic related :-).

37 * 4. If you include any Windows specific code (or a derivative thereof) from

38 * the apps directory (application code) you must include an acknowledgement:

39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

40 *

41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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

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

49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

51 * SUCH DAMAGE.

52 *

53 * The licence and distribution terms for any publically available version or

54 * derivative of this code cannot be changed. i.e. this code cannot simply be

55 * copied and put under another distribution licence

56 * [including the GNU Public Licence.]

57 */

58

59 #include <stdio.h>

60 #include "cryptlib.h"

61 #include <openssl/bn.h>

62 #include <openssl/rsa.h>

63 #include <openssl/rand.h>

64

65 int RSA_padding_add_PKCS1_type_1(unsigned char *to, int tlen,

66 const unsigned char *from, int flen)

67 {

68 int j;

69 unsigned char *p;

70

71 if (flen > (tlen-RSA_PKCS1_PADDING_SIZE))

72 {

73 RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_1,RSA_R_DATA_TOO_LARGE_F OR_KEY_SIZE);

74 return(0);

75 }

76

77 p=(unsigned char *)to;

78

79 *(p++)=0;

80 (p++)=1; / Private Key BT (Block Type) */

81

82 /* pad out with 0xff data */

83 j=tlen-3-flen;

84 memset(p,0xff,j);

85 p+=j;

86 *(p++)='\0';

87 memcpy(p,from,(unsigned int)flen);

88 return(1);

89 }

90

91 int RSA_padding_check_PKCS1_type_1(unsigned char *to, int tlen,

92 const unsigned char *from, int flen, int num)

93 {

94 int i,j;

95 const unsigned char *p;

96

97 p=from;

98 if ((num != (flen+1)) \|\| (*(p++) != 01))

99 {

100 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,RSA_R_BLOCK_TYPE_IS_ NOT_01);

101 return(-1);

102 }

103

104 /* scan over padding data */

105 j=flen-1; /* one for type. */

106 for (i=0; i<j; i++)

107 {

108 if (p != 0xff) / should decrypt to 0xff */

109 {

110 if (*p == 0)

111 { p++; break; }

112 else {

113 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,RSA_ R_BAD_FIXED_HEADER_DECRYPT);

114 return(-1);

115 }

116 }

117 p++;

118 }

119

120 if (i == j)

121 {

122 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,RSA_R_NULL_BEFORE_BL OCK_MISSING);

123 return(-1);

124 }

125

126 if (i < 8)

127 {

128 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,RSA_R_BAD_PAD_BYTE_C OUNT);

129 return(-1);

130 }

131 i++; /* Skip over the '\0' */

132 j-=i;

133 if (j > tlen)

134 {

135 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,RSA_R_DATA_TOO_LARGE );

136 return(-1);

137 }

138 memcpy(to,p,(unsigned int)j);

139

140 return(j);

141 }

142

143 int RSA_padding_add_PKCS1_type_2(unsigned char *to, int tlen,

144 const unsigned char *from, int flen)

145 {

146 int i,j;

147 unsigned char *p;

148

149 if (flen > (tlen-11))

150 {

151 RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_2,RSA_R_DATA_TOO_LARGE_F OR_KEY_SIZE);

152 return(0);

153 }

154

155 p=(unsigned char *)to;

156

157 *(p++)=0;

158 (p++)=2; / Public Key BT (Block Type) */

159

160 /* pad out with non-zero random data */

161 j=tlen-3-flen;

162

163 if (RAND_bytes(p,j) <= 0)

164 return(0);

165 for (i=0; i<j; i++)

166 {

167 if (*p == '\0')

168 do {

169 if (RAND_bytes(p,1) <= 0)

170 return(0);

171 } while (*p == '\0');

172 p++;

173 }

174

175 *(p++)='\0';

176

177 memcpy(p,from,(unsigned int)flen);

178 return(1);

179 }

180

181 int RSA_padding_check_PKCS1_type_2(unsigned char *to, int tlen,

182 const unsigned char *from, int flen, int num)

183 {

184 int i,j;

185 const unsigned char *p;

186

187 p=from;

188 if ((num != (flen+1)) \|\| (*(p++) != 02))

189 {

190 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,RSA_R_BLOCK_TYPE_IS_ NOT_02);

191 return(-1);

192 }

193 #ifdef PKCS1_CHECK

194 return(num-11);

195 #endif

196

197 /* scan over padding data */

198 j=flen-1; /* one for type. */

199 for (i=0; i<j; i++)

200 if (*(p++) == 0) break;

201

202 if (i == j)

203 {

204 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,RSA_R_NULL_BEFORE_BL OCK_MISSING);

205 return(-1);

206 }

207

208 if (i < 8)

209 {

210 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,RSA_R_BAD_PAD_BYTE_C OUNT);

211 return(-1);

212 }

213 i++; /* Skip over the '\0' */

214 j-=i;

215 if (j > tlen)

216 {

217 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,RSA_R_DATA_TOO_LARGE );

218 return(-1);

219 }

220 memcpy(to,p,(unsigned int)j);

221

222 return(j);

223 }

224

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