OpenCoverage

rsa_x931.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/openssl/src/crypto/rsa/rsa_x931.c
Source codeSwitch to Preprocessed file
LineSourceCount
1/*-
2 * Copyright 2005-2017 The OpenSSL Project Authors. All Rights Reserved.-
3 *-
4 * Licensed under the OpenSSL license (the "License"). You may not use-
5 * this file except in compliance with the License. You can obtain a copy-
6 * in the file LICENSE in the source distribution or at-
7 * https://www.openssl.org/source/license.html-
8 */-
9-
10#include <stdio.h>-
11#include "internal/cryptlib.h"-
12#include <openssl/bn.h>-
13#include <openssl/rsa.h>-
14#include <openssl/objects.h>-
15-
16int RSA_padding_add_X931(unsigned char *to, int tlen,-
17 const unsigned char *from, int flen)-
18{-
19 int j;-
20 unsigned char *p;-
21-
22 /*-
23 * Absolute minimum amount of padding is 1 header nibble, 1 padding-
24 * nibble and 2 trailer bytes: but 1 hash if is already in 'from'.-
25 */-
26-
27 j = tlen - flen - 2;-
28-
29 if (j < 0) {
j < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
30 RSAerr(RSA_F_RSA_PADDING_ADD_X931, RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);-
31 return -1;
never executed: return -1;
0
32 }-
33-
34 p = (unsigned char *)to;-
35-
36 /* If no padding start and end nibbles are in one byte */-
37 if (j == 0) {
j == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
38 *p++ = 0x6A;-
39 } else {
never executed: end of block
0
40 *p++ = 0x6B;-
41 if (j > 1) {
j > 1Description
TRUEnever evaluated
FALSEnever evaluated
0
42 memset(p, 0xBB, j - 1);-
43 p += j - 1;-
44 }
never executed: end of block
0
45 *p++ = 0xBA;-
46 }
never executed: end of block
0
47 memcpy(p, from, (unsigned int)flen);-
48 p += flen;-
49 *p = 0xCC;-
50 return 1;
never executed: return 1;
0
51}-
52-
53int RSA_padding_check_X931(unsigned char *to, int tlen,-
54 const unsigned char *from, int flen, int num)-
55{-
56 int i = 0, j;-
57 const unsigned char *p;-
58-
59 p = from;-
60 if ((num != flen) || ((*p != 0x6A) && (*p != 0x6B))) {
(num != flen)Description
TRUEnever evaluated
FALSEnever evaluated
(*p != 0x6A)Description
TRUEnever evaluated
FALSEnever evaluated
(*p != 0x6B)Description
TRUEnever evaluated
FALSEnever evaluated
0
61 RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_HEADER);-
62 return -1;
never executed: return -1;
0
63 }-
64-
65 if (*p++ == 0x6B) {
*p++ == 0x6BDescription
TRUEnever evaluated
FALSEnever evaluated
0
66 j = flen - 3;-
67 for (i = 0; i < j; i++) {
i < jDescription
TRUEnever evaluated
FALSEnever evaluated
0
68 unsigned char c = *p++;-
69 if (c == 0xBA)
c == 0xBADescription
TRUEnever evaluated
FALSEnever evaluated
0
70 break;
never executed: break;
0
71 if (c != 0xBB) {
c != 0xBBDescription
TRUEnever evaluated
FALSEnever evaluated
0
72 RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING);-
73 return -1;
never executed: return -1;
0
74 }-
75 }
never executed: end of block
0
76-
77 j -= i;-
78-
79 if (i == 0) {
i == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
80 RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING);-
81 return -1;
never executed: return -1;
0
82 }-
83-
84 } else {
never executed: end of block
0
85 j = flen - 2;-
86 }
never executed: end of block
0
87-
88 if (p[j] != 0xCC) {
p[j] != 0xCCDescription
TRUEnever evaluated
FALSEnever evaluated
0
89 RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_TRAILER);-
90 return -1;
never executed: return -1;
0
91 }-
92-
93 memcpy(to, p, (unsigned int)j);-
94-
95 return j;
never executed: return j;
0
96}-
97-
98/* Translate between X931 hash ids and NIDs */-
99-
100int RSA_X931_hash_id(int nid)-
101{-
102 switch (nid) {-
103 case NID_sha1:
never executed: case 64:
0
104 return 0x33;
never executed: return 0x33;
0
105-
106 case NID_sha256:
never executed: case 672:
0
107 return 0x34;
never executed: return 0x34;
0
108-
109 case NID_sha384:
never executed: case 673:
0
110 return 0x36;
never executed: return 0x36;
0
111-
112 case NID_sha512:
never executed: case 674:
0
113 return 0x35;
never executed: return 0x35;
0
114-
115 }-
116 return -1;
never executed: return -1;
0
117}-
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