Contributors: 11
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Eric Biggers |
708 |
58.76% |
3 |
15.79% |
| James Morris |
220 |
18.26% |
4 |
21.05% |
| Jason A. Donenfeld |
56 |
4.65% |
1 |
5.26% |
| Adrian-Ken Rueegsegger |
56 |
4.65% |
1 |
5.26% |
| James Hartley |
53 |
4.40% |
2 |
10.53% |
| Corentin Labbe |
46 |
3.82% |
1 |
5.26% |
| Herbert Xu |
40 |
3.32% |
3 |
15.79% |
| Max Vozeler |
12 |
1.00% |
1 |
5.26% |
| Kees Cook |
8 |
0.66% |
1 |
5.26% |
| Govindraj Raja |
5 |
0.41% |
1 |
5.26% |
| Thomas Gleixner |
1 |
0.08% |
1 |
5.26% |
| Total |
1205 |
|
19 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Crypto API support for MD5 and HMAC-MD5
*
* Copyright 2025 Google LLC
*/
#include <crypto/internal/hash.h>
#include <crypto/md5.h>
#include <linux/kernel.h>
#include <linux/module.h>
/*
* Export and import functions. crypto_shash wants a particular format that
* matches that used by some legacy drivers. It currently is the same as the
* library MD5 context, except the value in bytecount must be block-aligned and
* the remainder must be stored in an extra u8 appended to the struct.
*/
#define MD5_SHASH_STATE_SIZE (sizeof(struct md5_ctx) + 1)
static_assert(sizeof(struct md5_ctx) == sizeof(struct md5_state));
static_assert(offsetof(struct md5_ctx, state) == offsetof(struct md5_state, hash));
static_assert(offsetof(struct md5_ctx, bytecount) == offsetof(struct md5_state, byte_count));
static_assert(offsetof(struct md5_ctx, buf) == offsetof(struct md5_state, block));
static int __crypto_md5_export(const struct md5_ctx *ctx0, void *out)
{
struct md5_ctx ctx = *ctx0;
unsigned int partial;
u8 *p = out;
partial = ctx.bytecount % MD5_BLOCK_SIZE;
ctx.bytecount -= partial;
memcpy(p, &ctx, sizeof(ctx));
p += sizeof(ctx);
*p = partial;
return 0;
}
static int __crypto_md5_import(struct md5_ctx *ctx, const void *in)
{
const u8 *p = in;
memcpy(ctx, p, sizeof(*ctx));
p += sizeof(*ctx);
ctx->bytecount += *p;
return 0;
}
static int __crypto_md5_export_core(const struct md5_ctx *ctx, void *out)
{
memcpy(out, ctx, offsetof(struct md5_ctx, buf));
return 0;
}
static int __crypto_md5_import_core(struct md5_ctx *ctx, const void *in)
{
memcpy(ctx, in, offsetof(struct md5_ctx, buf));
return 0;
}
const u8 md5_zero_message_hash[MD5_DIGEST_SIZE] = {
0xd4, 0x1d, 0x8c, 0xd9, 0x8f, 0x00, 0xb2, 0x04,
0xe9, 0x80, 0x09, 0x98, 0xec, 0xf8, 0x42, 0x7e,
};
EXPORT_SYMBOL_GPL(md5_zero_message_hash);
#define MD5_CTX(desc) ((struct md5_ctx *)shash_desc_ctx(desc))
static int crypto_md5_init(struct shash_desc *desc)
{
md5_init(MD5_CTX(desc));
return 0;
}
static int crypto_md5_update(struct shash_desc *desc,
const u8 *data, unsigned int len)
{
md5_update(MD5_CTX(desc), data, len);
return 0;
}
static int crypto_md5_final(struct shash_desc *desc, u8 *out)
{
md5_final(MD5_CTX(desc), out);
return 0;
}
static int crypto_md5_digest(struct shash_desc *desc,
const u8 *data, unsigned int len, u8 *out)
{
md5(data, len, out);
return 0;
}
static int crypto_md5_export(struct shash_desc *desc, void *out)
{
return __crypto_md5_export(MD5_CTX(desc), out);
}
static int crypto_md5_import(struct shash_desc *desc, const void *in)
{
return __crypto_md5_import(MD5_CTX(desc), in);
}
static int crypto_md5_export_core(struct shash_desc *desc, void *out)
{
return __crypto_md5_export_core(MD5_CTX(desc), out);
}
static int crypto_md5_import_core(struct shash_desc *desc, const void *in)
{
return __crypto_md5_import_core(MD5_CTX(desc), in);
}
#define HMAC_MD5_KEY(tfm) ((struct hmac_md5_key *)crypto_shash_ctx(tfm))
#define HMAC_MD5_CTX(desc) ((struct hmac_md5_ctx *)shash_desc_ctx(desc))
static int crypto_hmac_md5_setkey(struct crypto_shash *tfm,
const u8 *raw_key, unsigned int keylen)
{
hmac_md5_preparekey(HMAC_MD5_KEY(tfm), raw_key, keylen);
return 0;
}
static int crypto_hmac_md5_init(struct shash_desc *desc)
{
hmac_md5_init(HMAC_MD5_CTX(desc), HMAC_MD5_KEY(desc->tfm));
return 0;
}
static int crypto_hmac_md5_update(struct shash_desc *desc,
const u8 *data, unsigned int len)
{
hmac_md5_update(HMAC_MD5_CTX(desc), data, len);
return 0;
}
static int crypto_hmac_md5_final(struct shash_desc *desc, u8 *out)
{
hmac_md5_final(HMAC_MD5_CTX(desc), out);
return 0;
}
static int crypto_hmac_md5_digest(struct shash_desc *desc,
const u8 *data, unsigned int len, u8 *out)
{
hmac_md5(HMAC_MD5_KEY(desc->tfm), data, len, out);
return 0;
}
static int crypto_hmac_md5_export(struct shash_desc *desc, void *out)
{
return __crypto_md5_export(&HMAC_MD5_CTX(desc)->hash_ctx, out);
}
static int crypto_hmac_md5_import(struct shash_desc *desc, const void *in)
{
struct hmac_md5_ctx *ctx = HMAC_MD5_CTX(desc);
ctx->ostate = HMAC_MD5_KEY(desc->tfm)->ostate;
return __crypto_md5_import(&ctx->hash_ctx, in);
}
static int crypto_hmac_md5_export_core(struct shash_desc *desc, void *out)
{
return __crypto_md5_export_core(&HMAC_MD5_CTX(desc)->hash_ctx, out);
}
static int crypto_hmac_md5_import_core(struct shash_desc *desc, const void *in)
{
struct hmac_md5_ctx *ctx = HMAC_MD5_CTX(desc);
ctx->ostate = HMAC_MD5_KEY(desc->tfm)->ostate;
return __crypto_md5_import_core(&ctx->hash_ctx, in);
}
static struct shash_alg algs[] = {
{
.base.cra_name = "md5",
.base.cra_driver_name = "md5-lib",
.base.cra_priority = 300,
.base.cra_blocksize = MD5_BLOCK_SIZE,
.base.cra_module = THIS_MODULE,
.digestsize = MD5_DIGEST_SIZE,
.init = crypto_md5_init,
.update = crypto_md5_update,
.final = crypto_md5_final,
.digest = crypto_md5_digest,
.export = crypto_md5_export,
.import = crypto_md5_import,
.export_core = crypto_md5_export_core,
.import_core = crypto_md5_import_core,
.descsize = sizeof(struct md5_ctx),
.statesize = MD5_SHASH_STATE_SIZE,
},
{
.base.cra_name = "hmac(md5)",
.base.cra_driver_name = "hmac-md5-lib",
.base.cra_priority = 300,
.base.cra_blocksize = MD5_BLOCK_SIZE,
.base.cra_ctxsize = sizeof(struct hmac_md5_key),
.base.cra_module = THIS_MODULE,
.digestsize = MD5_DIGEST_SIZE,
.setkey = crypto_hmac_md5_setkey,
.init = crypto_hmac_md5_init,
.update = crypto_hmac_md5_update,
.final = crypto_hmac_md5_final,
.digest = crypto_hmac_md5_digest,
.export = crypto_hmac_md5_export,
.import = crypto_hmac_md5_import,
.export_core = crypto_hmac_md5_export_core,
.import_core = crypto_hmac_md5_import_core,
.descsize = sizeof(struct hmac_md5_ctx),
.statesize = MD5_SHASH_STATE_SIZE,
},
};
static int __init crypto_md5_mod_init(void)
{
return crypto_register_shashes(algs, ARRAY_SIZE(algs));
}
module_init(crypto_md5_mod_init);
static void __exit crypto_md5_mod_exit(void)
{
crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
}
module_exit(crypto_md5_mod_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Crypto API support for MD5 and HMAC-MD5");
MODULE_ALIAS_CRYPTO("md5");
MODULE_ALIAS_CRYPTO("md5-lib");
MODULE_ALIAS_CRYPTO("hmac(md5)");
MODULE_ALIAS_CRYPTO("hmac-md5-lib");