1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/** \ingroup signature
* \file rpmio/digest.c
*/
#include "system.h"
#include "rpmio_internal.h"
#include "debug.h"
#ifdef SHA_DEBUG
#define DPRINTF(_a) fprintf _a
#else
#define DPRINTF(_a)
#endif
/**
* MD5/SHA1 digest private data.
*/
struct DIGEST_CTX_s {
rpmDigestFlags flags; /*!< Bit(s) to control digest operation. */
HASHContext *hashctx; /*!< Internal NSS hash context. */
};
DIGEST_CTX
rpmDigestDup(DIGEST_CTX octx)
{
DIGEST_CTX nctx;
nctx = memcpy(xcalloc(1, sizeof(*nctx)), octx, sizeof(*nctx));
nctx->hashctx = HASH_Clone(octx->hashctx);
if (nctx->hashctx == NULL) {
fprintf(stderr, "HASH_Clone failed\n");
exit(EXIT_FAILURE); /* FIX: callers do not bother checking error return */
}
return nctx;
}
static HASH_HashType
getHashType(pgpHashAlgo hashalgo)
{
switch (hashalgo) {
case PGPHASHALGO_MD5:
return HASH_AlgMD5;
break;
case PGPHASHALGO_SHA1:
return HASH_AlgSHA1;
break;
case PGPHASHALGO_SHA256:
return HASH_AlgSHA256;
break;
case PGPHASHALGO_SHA384:
return HASH_AlgSHA384;
break;
case PGPHASHALGO_SHA512:
return HASH_AlgSHA512;
break;
case PGPHASHALGO_RIPEMD160:
case PGPHASHALGO_MD2:
case PGPHASHALGO_TIGER192:
case PGPHASHALGO_HAVAL_5_160:
default:
return HASH_AlgNULL;
break;
}
}
size_t
rpmDigestLength(pgpHashAlgo hashalgo)
{
return HASH_ResultLen(getHashType(hashalgo));
}
DIGEST_CTX
rpmDigestInit(pgpHashAlgo hashalgo, rpmDigestFlags flags)
{
HASH_HashType type;
DIGEST_CTX ctx = xcalloc(1, sizeof(*ctx));
if (NSS_NoDB_Init(NULL) != SECSuccess)
return NULL;
ctx->flags = flags;
type = getHashType(hashalgo);
if (type == HASH_AlgNULL) {
free(ctx);
return NULL;
}
ctx->hashctx = HASH_Create(type);
if (ctx->hashctx == NULL) {
free(ctx);
return NULL;
}
HASH_Begin(ctx->hashctx);
DPRINTF((stderr, "*** Init(%x) ctx %p hashctx %p\n", flags, ctx, ctx->hashctx));
return ctx;
}
int
rpmDigestUpdate(DIGEST_CTX ctx, const void * data, size_t len)
{
unsigned int partlen;
const unsigned char *ptr = data;
if (ctx == NULL)
return -1;
DPRINTF((stderr, "*** Update(%p,%p,%d) hashctx %p \"%s\"\n", ctx, data, len, ctx->hashctx, ((char *)data)));
partlen = ~(unsigned int)0xFF;
while (len > 0) {
if (len < partlen) {
partlen = (unsigned int)len;
}
HASH_Update(ctx->hashctx, ptr, partlen);
ptr += partlen;
len -= partlen;
}
return 0;
}
int
rpmDigestFinal(DIGEST_CTX ctx, void ** datap, size_t *lenp, int asAscii)
{
unsigned char * digest;
char * t;
int i;
unsigned int digestlen;
if (ctx == NULL)
return -1;
digestlen = HASH_ResultLenContext(ctx->hashctx);
digest = xmalloc(digestlen);
DPRINTF((stderr, "*** Final(%p,%p,%p,%d) hashctx %p digest %p\n", ctx, datap, lenp, asAscii, ctx->hashctx, digest));
/* FIX: check rc */
HASH_End(ctx->hashctx, digest, &digestlen, digestlen);
/* Return final digest. */
if (!asAscii) {
if (lenp) *lenp = digestlen;
if (datap) {
*datap = digest;
digest = NULL;
}
} else {
if (lenp) *lenp = (2*digestlen) + 1;
if (datap) {
const byte * s = (const byte *) digest;
static const char hex[] = "0123456789abcdef";
*datap = t = xmalloc((2*digestlen) + 1);
for (i = 0 ; i < digestlen; i++) {
*t++ = hex[ (unsigned)((*s >> 4) & 0x0f) ];
*t++ = hex[ (unsigned)((*s++ ) & 0x0f) ];
}
*t = '\0';
}
}
if (digest) {
memset(digest, 0, digestlen); /* In case it's sensitive */
free(digest);
}
HASH_Destroy(ctx->hashctx);
memset(ctx, 0, sizeof(*ctx)); /* In case it's sensitive */
free(ctx);
return 0;
}
|
