72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
#include "des_core.h"
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static int rk_crypto_ecb128_encrypt(void *ctx, const unsigned char *in,
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unsigned long length, unsigned char *out,
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block128_f block) {
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unsigned long i = 0;
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for (i = 0; i < length / DES_BLOCK_SIZE; i++) {
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(*block)(in + i * DES_BLOCK_SIZE, out + i * DES_BLOCK_SIZE, ctx);
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};
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return 0;
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}
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int rk_des_ecb_encrypt(const unsigned char *in, unsigned char *out,
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unsigned long length, const unsigned char *key,
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const int key_len, const int enc) {
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rk_des_context ctx;
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rk_des3_context ctx3;
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if (key_len != 8 && key_len != 16 && key_len != 24)
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return -1;
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if (length % DES_BLOCK_SIZE)
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return -1;
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if (enc) {
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switch (key_len) {
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case 8:
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rk_des_setkey_enc(&ctx, key);
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rk_crypto_ecb128_encrypt((void *)&ctx, in, length, out, rk_des_crypt_ecb);
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break;
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case 16:
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rk_des3_set2key_enc(&ctx3, key);
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rk_crypto_ecb128_encrypt((void *)&ctx3, in, length, out,
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rk_des3_crypt_ecb);
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break;
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case 24:
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rk_des3_set3key_enc(&ctx3, key);
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rk_crypto_ecb128_encrypt((void *)&ctx3, in, length, out,
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rk_des3_crypt_ecb);
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break;
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default:
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return -1;
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}
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} else {
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switch (key_len) {
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case 8:
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rk_des_setkey_dec(&ctx, key);
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rk_crypto_ecb128_encrypt((void *)&ctx, in, length, out, rk_des_crypt_ecb);
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break;
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case 16:
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rk_des3_set2key_dec(&ctx3, key);
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rk_crypto_ecb128_encrypt((void *)&ctx3, in, length, out,
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rk_des3_crypt_ecb);
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break;
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case 24:
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rk_des3_set3key_dec(&ctx3, key);
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rk_crypto_ecb128_encrypt((void *)&ctx3, in, length, out,
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rk_des3_crypt_ecb);
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break;
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default:
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return -1;
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}
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}
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return 0;
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}
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