add hkdf_test()

makefile

@@ -156,7 +156,7 @@ src/misc/crypt/crypt_prng_is_valid.o src/misc/crypt/crypt_register_cipher.o \
 src/misc/crypt/crypt_register_hash.o src/misc/crypt/crypt_register_prng.o \
 src/misc/crypt/crypt_unregister_cipher.o src/misc/crypt/crypt_unregister_hash.o \
 src/misc/crypt/crypt_unregister_prng.o src/misc/error_to_string.o src/misc/pkcs5/pkcs_5_1.o \
-src/misc/pkcs5/pkcs_5_2.o src/misc/zeromem.o src/misc/hkdf/hkdf.o \
+src/misc/pkcs5/pkcs_5_2.o src/misc/zeromem.o src/misc/hkdf/hkdf.o src/misc/hkdf/hkdf_test.o \
 src/modes/cbc/cbc_decrypt.o src/modes/cbc/cbc_done.o \
 src/modes/cbc/cbc_encrypt.o src/modes/cbc/cbc_getiv.o src/modes/cbc/cbc_setiv.o \
 src/modes/cbc/cbc_start.o src/modes/cfb/cfb_decrypt.o src/modes/cfb/cfb_done.o \

src/headers/tomcrypt_hkdf.h

@@ -3,6 +3,8 @@
 /* ===> LTC_HKDF -- RFC5869 HMAC-based Key Derivation Function <=== */
 #ifdef LTC_HKDF
 
+int hkdf_test(void);
+
 int hkdf_extract(int hash_idx,
                  const unsigned char *salt, unsigned long saltlen,
                  const unsigned char *in,   unsigned long inlen,

src/misc/hkdf/hkdf_test.c

@@ -0,0 +1,148 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+#include "tomcrypt.h"
+
+/**
+  @file hkdf_test.c
+  LTC_HKDF support, self-test, Steffen Jaeckel
+*/
+
+#ifdef LTC_HKDF
+
+/*
+    TEST CASES SOURCE:
+
+Internet Engineering Task Force (IETF)                       H. Krawczyk
+Request for Comments: 5869                                  IBM Research
+Category: Informational                                        P. Eronen
+ISSN: 2070-1721                                                    Nokia
+                                                                May 2010
+Appendix A. Test Vectors
+*/
+
+/**
+  LTC_HKDF self-test
+  @return CRYPT_OK if successful, CRYPT_NOP if tests have been disabled.
+*/
+int hkdf_test(void)
+{
+ #ifndef LTC_TEST
+    return CRYPT_NOP;
+ #else
+    unsigned char OKM[82];
+    int i;
+
+    static const struct hkdf_test_case {
+        char* Hash;
+        unsigned char IKM[80];
+        unsigned long IKM_l;
+        unsigned char salt[80];
+        unsigned long salt_l;
+        unsigned char info[80];
+        unsigned long info_l;
+        unsigned long L;
+        unsigned char PRK[32];
+        unsigned char OKM[82];
+    } cases[] = {
+#ifdef LTC_SHA256
+        /*
+           Basic test case with SHA-256
+
+           Hash = SHA-256
+           IKM  = 0x0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b (22 octets)
+           salt = 0x000102030405060708090a0b0c (13 octets)
+           info = 0xf0f1f2f3f4f5f6f7f8f9 (10 octets)
+           L    = 42
+
+           PRK  = 0x077709362c2e32df0ddc3f0dc47bba63
+                  90b6c73bb50f9c3122ec844ad7c2b3e5 (32 octets)
+           OKM  = 0x3cb25f25faacd57a90434f64d0362f2a
+                  2d2d0a90cf1a5a4c5db02d56ecc4c5bf
+                  34007208d5b887185865 (42 octets)
+        */
+
+           { "sha256",
+            {0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
+             0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
+             0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b}, 22,
+            {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+             0x08, 0x09, 0x0a, 0x0b, 0x0c}, 13,
+            {0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
+             0xf8, 0xf9}, 10,
+             42,
+            {0x07, 0x77, 0x09, 0x36, 0x2c, 0x2e, 0x32, 0xdf,
+             0x0d, 0xdc, 0x3f, 0x0d, 0xc4, 0x7b, 0xba, 0x63,
+             0x90, 0xb6, 0xc7, 0x3b, 0xb5, 0x0f, 0x9c, 0x31,
+             0x22, 0xec, 0x84, 0x4a, 0xd7, 0xc2, 0xb3, 0xe5},
+            {0x3c, 0xb2, 0x5f, 0x25, 0xfa, 0xac, 0xd5, 0x7a,
+             0x90, 0x43, 0x4f, 0x64, 0xd0, 0x36, 0x2f, 0x2a,
+             0x2d, 0x2d, 0x0a, 0x90, 0xcf, 0x1a, 0x5a, 0x4c,
+             0x5d, 0xb0, 0x2d, 0x56, 0xec, 0xc4, 0xc5, 0xbf,
+             0x34, 0x00, 0x72, 0x08, 0xd5, 0xb8, 0x87, 0x18,
+             0x58, 0x65} }
+#endif /* LTC_SHA256 */
+    };
+
+    int err;
+    int tested=0,failed=0;
+    for(i=0; i < (int)(sizeof(cases) / sizeof(cases[0])); i++) {
+        int hash = find_hash(cases[i].Hash);
+        if (hash == -1) continue;
+        ++tested;
+        if((err = hkdf(hash, cases[i].salt, cases[i].salt_l,
+                        cases[i].info, cases[i].info_l,
+                        cases[i].IKM,   cases[i].IKM_l,
+                        OKM,  cases[i].L)) != CRYPT_OK) {
+#if 0
+            printf("LTC_HKDF-%s test #%d, %s\n", cases[i].Hash, i, error_to_string(err));
+#endif
+            return err;
+        }
+
+        if(XMEMCMP(OKM, cases[i].OKM, (size_t)cases[i].L) != 0)  {
+            failed++;
+#if 0
+          {
+            unsigned int j;
+            printf("\LTC_HKDF-%s test #%d:\n", cases[i].Hash, i);
+            printf(  "Result:  0x");
+            for(j=0; j < cases[i].L; j++) {
+                printf("%02x ", OKM[j]);
+            }
+            printf("\nCorrect: 0x");
+            for(j=0; j < cases[i].L; j++) {
+               printf("%02x ", cases[i].OKM[j]);
+            }
+            printf("\n");
+            return CRYPT_ERROR;
+          }
+#endif
+#if 0
+        } else {
+            printf("LTC_HKDF-%s test #%d: Passed\n", cases[i].Hash, i);
+#endif
+        }
+    }
+
+    if (failed != 0) {
+        return CRYPT_FAIL_TESTVECTOR;
+    } else if (tested == 0) {
+        return CRYPT_NOP;
+    } else {
+        return CRYPT_OK;
+    }
+ #endif
+}
+
+#endif
+
+
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */