Add current version of libSRTP from CVS.

libsrtp/crypto/test/aes_calc.c

+/*
+ * aes_calc.c
+ * 
+ * A simple AES calculator for generating AES encryption values
+ *
+ * David A. McGrew
+ * Cisco Systems, Inc.
+ */
+
+/*
+  
+ Example usage (with first NIST FIPS 197 test case):
+ 
+[sh]$ test/aes_calc 000102030405060708090a0b0c0d0e0f 00112233445566778899aabbccddeeff -v
+ plaintext:      00112233445566778899aabbccddeeff
+ key:            000102030405060708090a0b0c0d0e0f
+ ciphertext:     69c4e0d86a7b0430d8cdb78070b4c55a
+
+ */
+
+#include "aes.h"
+#include <stdio.h>
+#include <string.h>
+
+void
+usage(char *prog_name) {
+  printf("usage: %s <key> <plaintext> [-v]\n", prog_name);
+  exit(255);
+}
+
+#define AES_MAX_KEY_LEN 32
+
+int
+main (int argc, char *argv[]) {
+  v128_t data;
+  uint8_t key[AES_MAX_KEY_LEN];
+  aes_expanded_key_t exp_key;
+  int key_len, len;
+  int verbose;
+  err_status_t status;
+
+  if (argc == 3) {
+    /* we're not in verbose mode */
+    verbose = 0;
+  } else if (argc == 4) {
+    if (strncmp(argv[3], "-v", 2) == 0) {
+      /* we're in verbose mode */
+      verbose = 1;
+    } else {
+      /* unrecognized flag, complain and exit */
+      usage(argv[0]);
+    }
+  } else {
+    /* we've been fed the wrong number of arguments - compain and exit */
+    usage(argv[0]);
+  }
+  
+  /* read in key, checking length */
+  if (strlen(argv[1]) > AES_MAX_KEY_LEN*2) {
+    fprintf(stderr, 
+            "error: too many digits in key "
+            "(should be at most %d hexadecimal digits, found %u)\n",
+            AES_MAX_KEY_LEN*2, (unsigned)strlen(argv[1]));
+    exit(1);    
+  }
+  len = hex_string_to_octet_string((char*)key, argv[1], AES_MAX_KEY_LEN*2);
+  /* check that hex string is the right length */
+  if (len != 32 && len != 48 && len != 64) {
+    fprintf(stderr, 
+            "error: bad number of digits in key "
+            "(should be 32/48/64 hexadecimal digits, found %d)\n",
+            len);
+    exit(1);    
+  } 
+  key_len = len/2;
+      
+  /* read in plaintext, checking length */
+  if (strlen(argv[2]) > 16*2) {
+    fprintf(stderr, 
+            "error: too many digits in plaintext "
+            "(should be %d hexadecimal digits, found %u)\n",
+            16*2, (unsigned)strlen(argv[2]));
+    exit(1);    
+  }
+  len = hex_string_to_octet_string((char *)(&data), argv[2], 16*2);
+  /* check that hex string is the right length */
+  if (len < 16*2) {
+    fprintf(stderr, 
+            "error: too few digits in plaintext "
+            "(should be %d hexadecimal digits, found %d)\n",
+            16*2, len);
+    exit(1);    
+  }
+
+  if (verbose) {
+    /* print out plaintext */
+    printf("plaintext:\t%s\n", octet_string_hex_string((uint8_t *)&data, 16));
+  }
+
+  /* encrypt plaintext */
+  status = aes_expand_encryption_key(key, key_len, &exp_key);
+  if (status) {
+    fprintf(stderr,
+            "error: AES key expansion failed.\n");
+    exit(1);
+  }
+
+  aes_encrypt(&data, &exp_key);
+
+  /* write ciphertext to output */
+  if (verbose) {
+    printf("key:\t\t%s\n", octet_string_hex_string(key, key_len));
+    printf("ciphertext:\t");
+  }
+  printf("%s\n", v128_hex_string(&data));
+
+  return 0;
+}
+