+static int rc2_meth_to_magic(const EVP_CIPHER *e)
+ {
+ int i;
+
+ i=EVP_CIPHER_key_length(e);
+ if (i == 16) return(RC2_128_MAGIC);
+ else if (i == 8) return(RC2_64_MAGIC);
+ else if (i == 5) return(RC2_40_MAGIC);
+ else return(0);
+ }
+
+static EVP_CIPHER *rc2_magic_to_meth(int i)
+ {
+ if (i == RC2_128_MAGIC) return(EVP_rc2_cbc());
+ else if (i == RC2_64_MAGIC) return(EVP_rc2_64_cbc());
+ else if (i == RC2_40_MAGIC) return(EVP_rc2_40_cbc());
+ else
+ {
+ EVPerr(EVP_F_RC2_MAGIC_TO_METH,EVP_R_UNSUPPORTED_KEY_SIZE);
+ return(NULL);
+ }
+ }
+
+static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
+ {
+ long num=0;
+ int i=0,l;
+ EVP_CIPHER *e;
+
+ if (type != NULL)
+ {
+ l=EVP_CIPHER_CTX_iv_length(c);
+ i=ASN1_TYPE_get_int_octetstring(type,&num,c->oiv,l);
+ if (i != l)
+ return(-1);
+ else if (i > 0)
+ memcpy(c->iv,c->oiv,l);
+ e=rc2_magic_to_meth((int)num);
+ if (e == NULL)
+ return(-1);
+ if (e != EVP_CIPHER_CTX_cipher(c))
+ {
+ EVP_CIPHER_CTX_cipher(c)=e;
+ rc2_cbc_init_key(c,NULL,NULL,1);
+ }
+ }
+ return(i);
+ }
+
+static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
+ {
+ long num;
+ int i=0,j;
+
+ if (type != NULL)
+ {
+ num=rc2_meth_to_magic(EVP_CIPHER_CTX_cipher(c));
+ j=EVP_CIPHER_CTX_iv_length(c);
+ i=ASN1_TYPE_set_int_octetstring(type,num,c->oiv,j);
+ }
+ return(i);
+ }
+