[Mono-list] c# with c

[Pierro]

hello,. Congratulation for Mono.

I want to use the hash function of openssl with my code in mono.

The file .h in C is :

#define SHA_BLOCK    16

typedef struct SHAstate_st
{
    unsigned long h0,h1,h2,h3,h4;
    unsigned long Nl,Nh;
    unsigned long data[SHA_LBLOCK];
    int num;
} SHA_CTX;

void SHA1_Init(SHA_CTX *c);

void SHA1_Update(SHA_CTX *c, unsigned char *data, unsigned long len);

void SHA1_Final(unsigned char *md, SHA_CTX *c);

---------------------------

I have write my wrapper like this :

protected int SHA_BLOCK = 16;

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]
public struct SHA_CTX
{
    public uint h0;
    public uint h1;
    public uint h2;
    public uint h3;
    public uint h4;
    public uint Nl;
    public uint Nh;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
    public uint [] data ;
    public int num;
}
        
//chargement de la dll SHA1.so "C"
[DllImport("SHA1")]
public static extern void SHA1_Init(ref SHA_CTX c);
//public static extern void SHA1_Init(IntPtr c);

//chargement de la dll SHA1.dll "C"
[DllImport("SHA1")]
public static extern void SHA1_Update(ref SHA_CTX c, ref byte [] data, 
uint len);
//public static extern void SHA1_Update(ref SHA_CTX c, IntPtr data, uint 
len);
//public static extern void SHA1_Update(ref SHA_CTX c, byte * data, uint 
len);
        
//chargement de la dll SHA1.dll "C"
[DllImport("SHA1")]
public static extern void  SHA1_Final(ref byte [] md, ref SHA_CTX c);
//public static extern void  SHA1_Final(IntPtr md, ref SHA_CTX c);
//public static extern void  SHA1_Final(byte* md, ref SHA_CTX c);
        
-----------------------

With the structure, i can acces to the array data. ?

And i don't know how to wrapp " unsigned char * " ? my solutions don't work.


Can you help me please ?

Thank you very much.

Pierre alain.