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Crypto module autoloading

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2009-12-23 17:33:35 +01:00
parent ba136b293a
commit 7316783f35
9 changed files with 230 additions and 21 deletions
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46
lib/crypto.c
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@ -32,6 +32,8 @@ struct grub_crypto_hmac_handle
static gcry_cipher_spec_t *grub_ciphers = NULL;
static gcry_md_spec_t *grub_digests = NULL;
void (*grub_crypto_autoload_hook) (const char *name) = NULL;
/* Based on libgcrypt-1.4.4/src/misc.c. */
void
grub_burn_stack (grub_size_t size)
@ -91,28 +93,44 @@ const gcry_md_spec_t *
grub_crypto_lookup_md_by_name (const char *name)
{
const gcry_md_spec_t *md;
for (md = grub_digests; md; md = md->next)
if (grub_strcasecmp (name, md->name) == 0)
return md;
return NULL;
int first = 1;
while (1)
{
for (md = grub_digests; md; md = md->next)
if (grub_strcasecmp (name, md->name) == 0)
return md;
if (grub_crypto_autoload_hook && first)
grub_crypto_autoload_hook (name);
else
return NULL;
first = 0;
}
}
const gcry_cipher_spec_t *
grub_crypto_lookup_cipher_by_name (const char *name)
{
const gcry_cipher_spec_t *ciph;
for (ciph = grub_ciphers; ciph; ciph = ciph->next)
int first = 1;
while (1)
{
const char **alias;
if (grub_strcasecmp (name, ciph->name) == 0)
return ciph;
if (!ciph->aliases)
continue;
for (alias = ciph->aliases; *alias; alias++)
if (grub_strcasecmp (name, *alias) == 0)
return ciph;
for (ciph = grub_ciphers; ciph; ciph = ciph->next)
{
const char **alias;
if (grub_strcasecmp (name, ciph->name) == 0)
return ciph;
if (!ciph->aliases)
continue;
for (alias = ciph->aliases; *alias; alias++)
if (grub_strcasecmp (name, *alias) == 0)
return ciph;
}
if (grub_crypto_autoload_hook && first)
grub_crypto_autoload_hook (name);
else
return NULL;
first = 0;
}
return NULL;
}