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Encrypt: support NULL message digest

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This commit is contained in:
Davide Beatrici 2018-08-12 01:53:30 +02:00
parent 6764e24f20
commit 3d13f56314
2 changed files with 22 additions and 3 deletions
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24
src/Mayaqua/Encrypt.c
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@ -408,7 +408,18 @@ void HMacSha1(void *dst, void *key, UINT key_size, void *data, UINT data_size)
// Calculate the HMAC // Calculate the HMAC
void MdProcess(MD *md, void *dest, void *src, UINT size) void MdProcess(MD *md, void *dest, void *src, UINT size)
{ {
int r; int r = 0;
if (md != NULL && md->isNullMd)
{
if (dest != src)
{
Copy(dest, src, size);
}
return;
}
// Validate arguments // Validate arguments
if (md == NULL || dest == NULL || (src != NULL && size == 0)) if (md == NULL || dest == NULL || (src != NULL && size == 0))
{ {
@ -417,8 +428,6 @@ void MdProcess(MD *md, void *dest, void *src, UINT size)
HMAC_Init_ex(md->Ctx, NULL, 0, NULL, NULL); HMAC_Init_ex(md->Ctx, NULL, 0, NULL, NULL);
HMAC_Update(md->Ctx, src, size); HMAC_Update(md->Ctx, src, size);
r = 0;
HMAC_Final(md->Ctx, dest, &r); HMAC_Final(md->Ctx, dest, &r);
} }
@ -447,6 +456,15 @@ MD *NewMd(char *name)
m = ZeroMalloc(sizeof(MD)); m = ZeroMalloc(sizeof(MD));
StrCpy(m->Name, sizeof(m->Name), name); StrCpy(m->Name, sizeof(m->Name), name);
if (StrCmpi(name, "[null-digest]") == 0 ||
StrCmpi(name, "NULL") == 0 ||
IsEmptyStr(name))
{
m->isNullMd = true;
return m;
}
m->Md = (const struct evp_md_st *)EVP_get_digestbyname(name); m->Md = (const struct evp_md_st *)EVP_get_digestbyname(name);
if (m->Md == NULL) if (m->Md == NULL)
{ {

1
src/Mayaqua/Encrypt.h
View File

@ -359,6 +359,7 @@ struct CIPHER
struct MD struct MD
{ {
char Name[MAX_PATH]; char Name[MAX_PATH];
bool isNullMd;
const struct evp_md_st *Md; const struct evp_md_st *Md;
struct hmac_ctx_st *Ctx; struct hmac_ctx_st *Ctx;
UINT Size; UINT Size;