-
-IMPLEMENT_BLOCK_CIPHER(rc2, rc2.ks, RC2, rc2, NID_rc2,
- 8,
- EVP_RC2_KEY_SIZE, 8,
- EVP_CIPH_VARIABLE_LENGTH, rc2_init_key, NULL,
- rc2_set_asn1_type_and_iv, rc2_get_asn1_type_and_iv, NULL)
-
-#define RC2_40_MAGIC 0xa0
-#define RC2_64_MAGIC 0x78
-#define RC2_128_MAGIC 0x3a
-
-static EVP_CIPHER r2_64_cbc_cipher=
- {
- NID_rc2_64_cbc,
- 8,8 /* 64 bit */,8,
- EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH,
- rc2_init_key,
- rc2_cbc_cipher,
- NULL,
- sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
- sizeof((((EVP_CIPHER_CTX *)NULL)->c.rc2)),
- rc2_set_asn1_type_and_iv,
- rc2_get_asn1_type_and_iv,
- NULL,
- NULL
- };
-
-static EVP_CIPHER r2_40_cbc_cipher=
- {
- NID_rc2_40_cbc,
- 8,5 /* 40 bit */,8,
- EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH,
- rc2_init_key,
- rc2_cbc_cipher,
- NULL,
- sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
- sizeof((((EVP_CIPHER_CTX *)NULL)->c.rc2)),
- rc2_set_asn1_type_and_iv,
- rc2_get_asn1_type_and_iv,
- NULL,
- NULL
- };
-
-EVP_CIPHER *EVP_rc2_64_cbc(void)
- {
- return(&r2_64_cbc_cipher);
- }
-
-EVP_CIPHER *EVP_rc2_40_cbc(void)
- {
- return(&r2_40_cbc_cipher);
- }
-
-static int rc2_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key,
- unsigned char *iv, int enc)
- {
- RC2_set_key(&(ctx->c.rc2.ks),EVP_CIPHER_CTX_key_length(ctx),
- key,EVP_CIPHER_key_length(ctx->cipher)*8);
- return 1;
- }
-
-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_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
+
+typedef struct {
+ int key_bits; /* effective key bits */
+ RC2_KEY ks; /* key schedule */
+} EVP_RC2_KEY;
+
+# define data(ctx) EVP_C_DATA(EVP_RC2_KEY,ctx)
+
+IMPLEMENT_BLOCK_CIPHER(rc2, ks, RC2, EVP_RC2_KEY, NID_rc2,
+ 8,
+ RC2_KEY_LENGTH, 8, 64,
+ EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
+ rc2_init_key, NULL,
+ rc2_set_asn1_type_and_iv, rc2_get_asn1_type_and_iv,
+ rc2_ctrl)
+# define RC2_40_MAGIC 0xa0
+# define RC2_64_MAGIC 0x78
+# define RC2_128_MAGIC 0x3a
+static const EVP_CIPHER r2_64_cbc_cipher = {
+ NID_rc2_64_cbc,
+ 8, 8 /* 64 bit */ , 8,
+ EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
+ rc2_init_key,
+ rc2_cbc_cipher,
+ NULL,
+ sizeof(EVP_RC2_KEY),
+ rc2_set_asn1_type_and_iv,
+ rc2_get_asn1_type_and_iv,
+ rc2_ctrl,
+ NULL
+};
+
+static const EVP_CIPHER r2_40_cbc_cipher = {
+ NID_rc2_40_cbc,
+ 8, 5 /* 40 bit */ , 8,
+ EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
+ rc2_init_key,
+ rc2_cbc_cipher,
+ NULL,
+ sizeof(EVP_RC2_KEY),
+ rc2_set_asn1_type_and_iv,
+ rc2_get_asn1_type_and_iv,
+ rc2_ctrl,
+ NULL
+};
+
+const EVP_CIPHER *EVP_rc2_64_cbc(void)
+{
+ return (&r2_64_cbc_cipher);
+}
+
+const EVP_CIPHER *EVP_rc2_40_cbc(void)
+{
+ return (&r2_40_cbc_cipher);
+}
+
+static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+ const unsigned char *iv, int enc)
+{
+ RC2_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx),
+ key, data(ctx)->key_bits);
+ return 1;
+}
+
+static int rc2_meth_to_magic(EVP_CIPHER_CTX *e)
+{
+ int i;
+
+ EVP_CIPHER_CTX_ctrl(e, EVP_CTRL_GET_RC2_KEY_BITS, 0, &i);
+ if (i == 128)
+ return (RC2_128_MAGIC);
+ else if (i == 64)
+ return (RC2_64_MAGIC);
+ else if (i == 40)
+ return (RC2_40_MAGIC);
+ else
+ return (0);
+}
+
+static int rc2_magic_to_meth(int i)
+{
+ if (i == RC2_128_MAGIC)
+ return 128;
+ else if (i == RC2_64_MAGIC)
+ return 64;
+ else if (i == RC2_40_MAGIC)
+ return 40;
+ else {
+ EVPerr(EVP_F_RC2_MAGIC_TO_METH, EVP_R_UNSUPPORTED_KEY_SIZE);
+ return (0);
+ }
+}