perl/openssl_cipher.xs

   1 #include "p5SSLeay.h"
   2
   3 int boot_cipher()
   4         {
   5         SSLeay_add_all_ciphers();
   6         return(1);
   7         }
   8
   9 MODULE =  SSLeay::Cipher        PACKAGE = SSLeay::Cipher PREFIX = p5_EVP_C_
  10
  11 VERSIONCHECK: DISABLE
  12
  13 void
  14 p5_EVP_C_new(...)
  15         PREINIT:
  16                 EVP_CIPHER_CTX *ctx;
  17                 EVP_CIPHER *c;
  18                 char *name;
  19         PPCODE:
  20                 if ((items == 1) && SvPOK(ST(0)))
  21                         name=SvPV(ST(0),na);
  22                 else if ((items == 2) && SvPOK(ST(1)))
  23                         name=SvPV(ST(1),na);
  24                 else
  25                         croak("Usage: SSLeay::Cipher::new(type)");
  26                 PUSHs(sv_newmortal());
  27                 c=EVP_get_cipherbyname(name);
  28                 if (c != NULL)
  29                         {
  30                         ctx=malloc(sizeof(EVP_CIPHER_CTX));
  31                         EVP_EncryptInit(ctx,c,NULL,NULL);
  32                         sv_setref_pv(ST(0), "SSLeay::Cipher", (void*)ctx);
  33                         }
  34
  35 datum
  36 p5_EVP_C_name(ctx)
  37         EVP_CIPHER_CTX *ctx
  38         CODE:
  39                 RETVAL.dptr=OBJ_nid2ln(EVP_CIPHER_CTX_nid(ctx));
  40                 RETVAL.dsize=strlen(RETVAL.dptr);
  41         OUTPUT:
  42                 RETVAL
  43
  44 int
  45 p5_EVP_C_key_length(ctx)
  46         EVP_CIPHER_CTX *ctx
  47         CODE:
  48                 RETVAL=EVP_CIPHER_CTX_key_length(ctx);
  49         OUTPUT:
  50                 RETVAL
  51
  52 int
  53 p5_EVP_C_iv_length(ctx)
  54         EVP_CIPHER_CTX *ctx
  55         CODE:
  56                 RETVAL=EVP_CIPHER_CTX_iv_length(ctx);
  57         OUTPUT:
  58                 RETVAL
  59
  60 int
  61 p5_EVP_C_block_size(ctx)
  62         EVP_CIPHER_CTX *ctx
  63         CODE:
  64                 RETVAL=EVP_CIPHER_CTX_block_size(ctx);
  65         OUTPUT:
  66                 RETVAL
  67
  68 void
  69 p5_EVP_C_init(ctx,key,iv,enc)
  70         EVP_CIPHER_CTX *ctx
  71         datum key
  72         datum iv
  73         int enc
  74         PREINIT:
  75                 char loc_iv[EVP_MAX_IV_LENGTH];
  76                 char loc_key[EVP_MAX_KEY_LENGTH];
  77                 char *ip=loc_iv,*kp=loc_key;
  78                 int i;
  79                 memset(loc_iv,0,EVP_MAX_IV_LENGTH);
  80                 memset(loc_key,0,EVP_MAX_KEY_LENGTH);
  81         CODE:
  82                 i=key.dsize;
  83                 if (key.dsize > EVP_CIPHER_CTX_key_length(ctx))
  84                         i=EVP_CIPHER_CTX_key_length(ctx);
  85                 if (i > 0)
  86                         {
  87                         memset(kp,0,EVP_MAX_KEY_LENGTH);
  88                         memcpy(kp,key.dptr,i);
  89                         }
  90                 else
  91                         kp=NULL;
  92                 i=iv.dsize;
  93                 if (iv.dsize > EVP_CIPHER_CTX_iv_length(ctx))
  94                         i=EVP_CIPHER_CTX_iv_length(ctx);
  95                 if (i > 0)
  96                         {
  97                         memcpy(ip,iv.dptr,i);
  98                         memset(ip,0,EVP_MAX_IV_LENGTH);
  99                         }
 100                 else
 101                         ip=NULL;
 102                 EVP_CipherInit(ctx,EVP_CIPHER_CTX_cipher(ctx),kp,ip,enc);
 103                 memset(loc_key,0,sizeof(loc_key));
 104                 memset(loc_iv,0,sizeof(loc_iv));
 105
 106 SV *
 107 p5_EVP_C_cipher(ctx,in)
 108         EVP_CIPHER_CTX *ctx;
 109         datum in;
 110         CODE:
 111                 RETVAL=newSVpv("",0);
 112                 SvGROW(RETVAL,in.dsize+EVP_CIPHER_CTX_block_size(ctx)+1);
 113                 EVP_Cipher(ctx,SvPV(RETVAL,na),in.dptr,in.dsize);
 114                 SvCUR_set(RETVAL,in.dsize);
 115         OUTPUT:
 116                 RETVAL
 117
 118 SV *
 119 p5_EVP_C_update(ctx, in)
 120         EVP_CIPHER_CTX *ctx
 121         datum in
 122         PREINIT:
 123         int i;
 124         CODE:
 125                 RETVAL=newSVpv("",0);
 126                 SvGROW(RETVAL,in.dsize+EVP_CIPHER_CTX_block_size(ctx)+1);
 127                 EVP_CipherUpdate(ctx,SvPV(RETVAL,na),&i,in.dptr,in.dsize);
 128                 SvCUR_set(RETVAL,i);
 129         OUTPUT:
 130                 RETVAL
 131
 132 SV *
 133 p5_EVP_C_final(ctx)
 134         EVP_CIPHER_CTX *ctx
 135         PREINIT:
 136         int i;
 137         CODE:
 138                 RETVAL=newSVpv("",0);
 139                 SvGROW(RETVAL,EVP_CIPHER_CTX_block_size(ctx)+1);
 140                 if (!EVP_CipherFinal(ctx,SvPV(RETVAL,na),&i))
 141                         sv_setpv(RETVAL,"BAD DECODE");
 142                 else
 143                         SvCUR_set(RETVAL,i);
 144         OUTPUT:
 145                 RETVAL
 146
 147 void
 148 p5_EVP_C_DESTROY(ctx)
 149         EVP_CIPHER_CTX *ctx
 150         CODE:
 151         free((char *)ctx);
 152