diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/evp/e_rc2.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/evp/e_rc2.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/evp/e_rc2.c b/openssl-1.1.0h/crypto/evp/e_rc2.c new file mode 100644 index 0000000..ed10bb3 --- /dev/null +++ b/openssl-1.1.0h/crypto/evp/e_rc2.c @@ -0,0 +1,189 @@ +/* + * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include <stdio.h> +#include "internal/cryptlib.h" + +#ifndef OPENSSL_NO_RC2 + +# include <openssl/evp.h> +# include <openssl/objects.h> +# include "internal/evp_int.h" +# include <openssl/rc2.h> + +static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc); +static int rc2_meth_to_magic(EVP_CIPHER_CTX *ctx); +static int rc2_magic_to_meth(int i); +static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type); +static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type); +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); + } +} + +static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) +{ + long num = 0; + int i = 0; + int key_bits; + unsigned int l; + unsigned char iv[EVP_MAX_IV_LENGTH]; + + if (type != NULL) { + l = EVP_CIPHER_CTX_iv_length(c); + OPENSSL_assert(l <= sizeof(iv)); + i = ASN1_TYPE_get_int_octetstring(type, &num, iv, l); + if (i != (int)l) + return -1; + key_bits = rc2_magic_to_meth((int)num); + if (!key_bits) + return -1; + if (i > 0 && !EVP_CipherInit_ex(c, NULL, NULL, NULL, iv, -1)) + return -1; + EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_RC2_KEY_BITS, key_bits, NULL); + if (EVP_CIPHER_CTX_set_key_length(c, key_bits / 8) <= 0) + return -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(c); + j = EVP_CIPHER_CTX_iv_length(c); + i = ASN1_TYPE_set_int_octetstring(type, num, + (unsigned char *)EVP_CIPHER_CTX_original_iv(c), + j); + } + return (i); +} + +static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) +{ + switch (type) { + case EVP_CTRL_INIT: + data(c)->key_bits = EVP_CIPHER_CTX_key_length(c) * 8; + return 1; + + case EVP_CTRL_GET_RC2_KEY_BITS: + *(int *)ptr = data(c)->key_bits; + return 1; + + case EVP_CTRL_SET_RC2_KEY_BITS: + if (arg > 0) { + data(c)->key_bits = arg; + return 1; + } + return 0; +# ifdef PBE_PRF_TEST + case EVP_CTRL_PBE_PRF_NID: + *(int *)ptr = NID_hmacWithMD5; + return 1; +# endif + + default: + return -1; + } +} + +#endif |