Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
crypto: md5 - Implement export_core() and import_core()
Since commit 9d7a0ab1c753 ("crypto: ahash - Handle partial blocks in
API"), the recently-added export_core() and import_core() methods in
struct shash_alg have effectively become mandatory (even though it is
not tested or enforced), since legacy drivers that need a fallback
depend on them. Make crypto/md5.c compatible with these legacy drivers
by adding export_core() and import_core() methods to it.
Fixes: ba8ee22a7f92 ("crypto: md5 - Wrap library and add HMAC support")
Link: https://lore.kernel.org/r/20250906215417.89584-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
+39
+39
crypto/md5.c
+39
crypto/md5.c
···
46
46
return 0;
47
47
}
48
48
49
+
static int __crypto_md5_export_core(const struct md5_ctx *ctx, void *out)
50
+
{
51
+
memcpy(out, ctx, offsetof(struct md5_ctx, buf));
52
+
return 0;
53
+
}
54
+
55
+
static int __crypto_md5_import_core(struct md5_ctx *ctx, const void *in)
56
+
{
57
+
memcpy(ctx, in, offsetof(struct md5_ctx, buf));
58
+
return 0;
59
+
}
60
+
49
61
const u8 md5_zero_message_hash[MD5_DIGEST_SIZE] = {
50
62
0xd4, 0x1d, 0x8c, 0xd9, 0x8f, 0x00, 0xb2, 0x04,
51
63
0xe9, 0x80, 0x09, 0x98, 0xec, 0xf8, 0x42, 0x7e,
···
100
88
static int crypto_md5_import(struct shash_desc *desc, const void *in)
101
89
{
102
90
return __crypto_md5_import(MD5_CTX(desc), in);
91
+
}
92
+
93
+
static int crypto_md5_export_core(struct shash_desc *desc, void *out)
94
+
{
95
+
return __crypto_md5_export_core(MD5_CTX(desc), out);
96
+
}
97
+
98
+
static int crypto_md5_import_core(struct shash_desc *desc, const void *in)
99
+
{
100
+
return __crypto_md5_import_core(MD5_CTX(desc), in);
103
101
}
104
102
105
103
#define HMAC_MD5_KEY(tfm) ((struct hmac_md5_key *)crypto_shash_ctx(tfm))
···
161
139
return __crypto_md5_import(&ctx->hash_ctx, in);
162
140
}
163
141
142
+
static int crypto_hmac_md5_export_core(struct shash_desc *desc, void *out)
143
+
{
144
+
return __crypto_md5_export_core(&HMAC_MD5_CTX(desc)->hash_ctx, out);
145
+
}
146
+
147
+
static int crypto_hmac_md5_import_core(struct shash_desc *desc, const void *in)
148
+
{
149
+
struct hmac_md5_ctx *ctx = HMAC_MD5_CTX(desc);
150
+
151
+
ctx->ostate = HMAC_MD5_KEY(desc->tfm)->ostate;
152
+
return __crypto_md5_import_core(&ctx->hash_ctx, in);
153
+
}
154
+
164
155
static struct shash_alg algs[] = {
165
156
{
166
157
.base.cra_name = "md5",
···
188
153
.digest = crypto_md5_digest,
189
154
.export = crypto_md5_export,
190
155
.import = crypto_md5_import,
156
+
.export_core = crypto_md5_export_core,
157
+
.import_core = crypto_md5_import_core,
191
158
.descsize = sizeof(struct md5_ctx),
192
159
.statesize = MD5_SHASH_STATE_SIZE,
193
160
},
···
208
171
.digest = crypto_hmac_md5_digest,
209
172
.export = crypto_hmac_md5_export,
210
173
.import = crypto_hmac_md5_import,
174
+
.export_core = crypto_hmac_md5_export_core,
175
+
.import_core = crypto_hmac_md5_import_core,
211
176
.descsize = sizeof(struct hmac_md5_ctx),
212
177
.statesize = MD5_SHASH_STATE_SIZE,
213
178
},