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path: root/src/lib/libcrypto/rsa/rsa_pk1.c
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Diffstat (limited to 'src/lib/libcrypto/rsa/rsa_pk1.c')
-rw-r--r--src/lib/libcrypto/rsa/rsa_pk1.c241
1 files changed, 122 insertions, 119 deletions
diff --git a/src/lib/libcrypto/rsa/rsa_pk1.c b/src/lib/libcrypto/rsa/rsa_pk1.c
index 36133b6d12..f5492315cc 100644
--- a/src/lib/libcrypto/rsa/rsa_pk1.c
+++ b/src/lib/libcrypto/rsa/rsa_pk1.c
@@ -1,4 +1,4 @@
1/* $OpenBSD: rsa_pk1.c,v 1.7 2014/06/12 15:49:30 deraadt Exp $ */ 1/* $OpenBSD: rsa_pk1.c,v 1.8 2014/07/09 08:20:08 miod Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved. 3 * All rights reserved.
4 * 4 *
@@ -62,160 +62,163 @@
62#include <openssl/rsa.h> 62#include <openssl/rsa.h>
63#include <openssl/rand.h> 63#include <openssl/rand.h>
64 64
65int RSA_padding_add_PKCS1_type_1(unsigned char *to, int tlen, 65int
66 const unsigned char *from, int flen) 66RSA_padding_add_PKCS1_type_1(unsigned char *to, int tlen,
67 { 67 const unsigned char *from, int flen)
68{
68 int j; 69 int j;
69 unsigned char *p; 70 unsigned char *p;
70 71
71 if (flen > (tlen-RSA_PKCS1_PADDING_SIZE)) 72 if (flen > (tlen-RSA_PKCS1_PADDING_SIZE)) {
72 { 73 RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_1,
73 RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_1,RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE); 74 RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
74 return(0); 75 return 0;
75 } 76 }
76 77
77 p=(unsigned char *)to; 78 p = (unsigned char *)to;
78 79
79 *(p++)=0; 80 *(p++) = 0;
80 *(p++)=1; /* Private Key BT (Block Type) */ 81 *(p++) = 1; /* Private Key BT (Block Type) */
81 82
82 /* pad out with 0xff data */ 83 /* pad out with 0xff data */
83 j=tlen-3-flen; 84 j = tlen - 3 - flen;
84 memset(p,0xff,j); 85 memset(p, 0xff, j);
85 p+=j; 86 p += j;
86 *(p++)='\0'; 87 *(p++) = '\0';
87 memcpy(p,from,(unsigned int)flen); 88 memcpy(p, from, (unsigned int)flen);
88 return(1); 89 return 1;
89 } 90}
90 91
91int RSA_padding_check_PKCS1_type_1(unsigned char *to, int tlen, 92int
92 const unsigned char *from, int flen, int num) 93RSA_padding_check_PKCS1_type_1(unsigned char *to, int tlen,
93 { 94 const unsigned char *from, int flen, int num)
94 int i,j; 95{
96 int i, j;
95 const unsigned char *p; 97 const unsigned char *p;
96 98
97 p=from; 99 p = from;
98 if ((num != (flen+1)) || (*(p++) != 01)) 100 if (num != flen + 1 || *(p++) != 01) {
99 { 101 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
100 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,RSA_R_BLOCK_TYPE_IS_NOT_01); 102 RSA_R_BLOCK_TYPE_IS_NOT_01);
101 return(-1); 103 return -1;
102 } 104 }
103 105
104 /* scan over padding data */ 106 /* scan over padding data */
105 j=flen-1; /* one for type. */ 107 j = flen - 1; /* one for type. */
106 for (i=0; i<j; i++) 108 for (i = 0; i < j; i++) {
107 { 109 if (*p != 0xff) { /* should decrypt to 0xff */
108 if (*p != 0xff) /* should decrypt to 0xff */ 110 if (*p == 0) {
109 { 111 p++;
110 if (*p == 0) 112 break;
111 { p++; break; } 113 } else {
112 else { 114 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
113 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,RSA_R_BAD_FIXED_HEADER_DECRYPT); 115 RSA_R_BAD_FIXED_HEADER_DECRYPT);
114 return(-1); 116 return -1;
115 }
116 } 117 }
117 p++;
118 } 118 }
119 p++;
120 }
119 121
120 if (i == j) 122 if (i == j) {
121 { 123 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
122 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,RSA_R_NULL_BEFORE_BLOCK_MISSING); 124 RSA_R_NULL_BEFORE_BLOCK_MISSING);
123 return(-1); 125 return -1;
124 } 126 }
125 127
126 if (i < 8) 128 if (i < 8) {
127 { 129 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
128 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,RSA_R_BAD_PAD_BYTE_COUNT); 130 RSA_R_BAD_PAD_BYTE_COUNT);
129 return(-1); 131 return -1;
130 } 132 }
131 i++; /* Skip over the '\0' */ 133 i++; /* Skip over the '\0' */
132 j-=i; 134 j -= i;
133 if (j > tlen) 135 if (j > tlen) {
134 { 136 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
135 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,RSA_R_DATA_TOO_LARGE); 137 RSA_R_DATA_TOO_LARGE);
136 return(-1); 138 return -1;
137 }
138 memcpy(to,p,(unsigned int)j);
139
140 return(j);
141 } 139 }
140 memcpy(to, p, (unsigned int)j);
142 141
143int RSA_padding_add_PKCS1_type_2(unsigned char *to, int tlen, 142 return j;
144 const unsigned char *from, int flen) 143}
145 { 144
145int
146RSA_padding_add_PKCS1_type_2(unsigned char *to, int tlen,
147 const unsigned char *from, int flen)
148{
146 int i,j; 149 int i,j;
147 unsigned char *p; 150 unsigned char *p;
148 151
149 if (flen > (tlen-11)) 152 if (flen > tlen - 11) {
150 { 153 RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_2,
151 RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_2,RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE); 154 RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
152 return(0); 155 return 0;
153 } 156 }
154 157
155 p=(unsigned char *)to; 158 p = (unsigned char *)to;
156 159
157 *(p++)=0; 160 *(p++) = 0;
158 *(p++)=2; /* Public Key BT (Block Type) */ 161 *(p++) = 2; /* Public Key BT (Block Type) */
159 162
160 /* pad out with non-zero random data */ 163 /* pad out with non-zero random data */
161 j=tlen-3-flen; 164 j = tlen - 3 - flen;
162 165
163 if (RAND_bytes(p,j) <= 0) 166 if (RAND_bytes(p, j) <= 0)
164 return(0); 167 return 0;
165 for (i=0; i<j; i++) 168 for (i = 0; i < j; i++) {
166 {
167 if (*p == '\0') 169 if (*p == '\0')
168 do { 170 do {
169 if (RAND_bytes(p,1) <= 0) 171 if (RAND_bytes(p, 1) <= 0)
170 return(0); 172 return 0;
171 } while (*p == '\0'); 173 } while (*p == '\0');
172 p++; 174 p++;
173 } 175 }
174 176
175 *(p++)='\0'; 177 *(p++) = '\0';
176 178
177 memcpy(p,from,(unsigned int)flen); 179 memcpy(p, from, (unsigned int)flen);
178 return(1); 180 return 1;
179 } 181}
180 182
181int RSA_padding_check_PKCS1_type_2(unsigned char *to, int tlen, 183int
182 const unsigned char *from, int flen, int num) 184RSA_padding_check_PKCS1_type_2(unsigned char *to, int tlen,
183 { 185 const unsigned char *from, int flen, int num)
184 int i,j; 186{
187 int i, j;
185 const unsigned char *p; 188 const unsigned char *p;
186 189
187 p=from; 190 p = from;
188 if ((num != (flen+1)) || (*(p++) != 02)) 191 if (num != flen + 1 || *(p++) != 02) {
189 { 192 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,
190 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,RSA_R_BLOCK_TYPE_IS_NOT_02); 193 RSA_R_BLOCK_TYPE_IS_NOT_02);
191 return(-1); 194 return -1;
192 } 195 }
193 196
194 /* scan over padding data */ 197 /* scan over padding data */
195 j=flen-1; /* one for type. */ 198 j = flen - 1; /* one for type. */
196 for (i=0; i<j; i++) 199 for (i = 0; i < j; i++)
197 if (*(p++) == 0) break; 200 if (*(p++) == 0)
198 201 break;
199 if (i == j) 202
200 { 203 if (i == j) {
201 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,RSA_R_NULL_BEFORE_BLOCK_MISSING); 204 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,
202 return(-1); 205 RSA_R_NULL_BEFORE_BLOCK_MISSING);
203 } 206 return -1;
207 }
204 208
205 if (i < 8) 209 if (i < 8) {
206 { 210 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,
207 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,RSA_R_BAD_PAD_BYTE_COUNT); 211 RSA_R_BAD_PAD_BYTE_COUNT);
208 return(-1); 212 return -1;
209 } 213 }
210 i++; /* Skip over the '\0' */ 214 i++; /* Skip over the '\0' */
211 j-=i; 215 j -= i;
212 if (j > tlen) 216 if (j > tlen) {
213 { 217 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,
214 RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,RSA_R_DATA_TOO_LARGE); 218 RSA_R_DATA_TOO_LARGE);
215 return(-1); 219 return -1;
216 }
217 memcpy(to,p,(unsigned int)j);
218
219 return(j);
220 } 220 }
221 memcpy(to, p, (unsigned int)j);
221 222
223 return j;
224}
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