avformat/concatdec: set safe mode to enabled instead of auto
[ffmpeg.git] / libavformat / rtmpdh.c
index 337341d..42ad72c 100644 (file)
@@ -46,8 +46,8 @@
     "F71C35FDAD44CFD2D74F9208BE258FF324943328F67329C0" \
     "FFFFFFFFFFFFFFFF"
 
-#if CONFIG_NETTLE || CONFIG_GCRYPT
-#if CONFIG_NETTLE
+#if CONFIG_GMP || CONFIG_GCRYPT
+#if CONFIG_GMP
 #define bn_new(bn)                      \
     do {                                \
         bn = av_malloc(sizeof(*bn));    \
 #define bn_sub_word(bn, w)          mpz_sub_ui(bn, bn, w)
 #define bn_cmp_1(bn)                mpz_cmp_ui(bn, 1)
 #define bn_num_bytes(bn)            (mpz_sizeinbase(bn, 2) + 7) / 8
-#define bn_bn2bin(bn, buf, len)     nettle_mpz_get_str_256(len, buf, bn)
+#define bn_bn2bin(bn, buf, len)                     \
+    do {                                            \
+        memset(buf, 0, len);                        \
+        if (bn_num_bytes(bn) <= len)                \
+            mpz_export(buf, NULL, 1, 1, 0, 0, bn);  \
+    } while (0)
 #define bn_bin2bn(bn, buf, len)                     \
     do {                                            \
         bn_new(bn);                                 \
         if (bn)                                     \
-            nettle_mpz_set_str_256_u(bn, len, buf); \
+            mpz_import(bn, len, 1, 1, 0, 0, buf);   \
     } while (0)
 #define bn_hex2bn(bn, buf, ret)                     \
     do {                                            \
             ret = 1;                                \
     } while (0)
 #define bn_modexp(bn, y, q, p)      mpz_powm(bn, y, q, p)
-#define bn_random(bn, num_bytes)                    \
-    do {                                            \
-        gmp_randstate_t rs;                         \
-        gmp_randinit_mt(rs);                        \
-        gmp_randseed_ui(rs, av_get_random_seed());  \
-        mpz_urandomb(bn, rs, num_bytes);            \
-        gmp_randclear(rs);                          \
+#define bn_random(bn, num_bits)                       \
+    do {                                              \
+        int bits = num_bits;                          \
+        mpz_set_ui(bn, 0);                            \
+        for (bits = num_bits; bits > 0; bits -= 32) { \
+            mpz_mul_2exp(bn, bn, 32);                 \
+            mpz_add_ui(bn, bn, av_get_random_seed()); \
+        }                                             \
+        mpz_fdiv_r_2exp(bn, bn, num_bits);            \
     } while (0)
 #elif CONFIG_GCRYPT
-#define bn_new(bn)                  bn = gcry_mpi_new(1)
+#define bn_new(bn)                                              \
+    do {                                                        \
+        if (!gcry_control(GCRYCTL_INITIALIZATION_FINISHED_P)) { \
+            if (!gcry_check_version("1.5.4"))                   \
+                return AVERROR(EINVAL);                         \
+            gcry_control(GCRYCTL_DISABLE_SECMEM, 0);            \
+            gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);   \
+        }                                                       \
+        bn = gcry_mpi_new(1);                                   \
+    } while (0)
 #define bn_free(bn)                 gcry_mpi_release(bn)
 #define bn_set_word(bn, w)          gcry_mpi_set_ui(bn, w)
 #define bn_cmp(a, b)                gcry_mpi_cmp(a, b)
 #define bn_bin2bn(bn, buf, len)     gcry_mpi_scan(&bn, GCRYMPI_FMT_USG, buf, len, NULL)
 #define bn_hex2bn(bn, buf, ret)     ret = (gcry_mpi_scan(&bn, GCRYMPI_FMT_HEX, buf, 0, 0) == 0)
 #define bn_modexp(bn, y, q, p)      gcry_mpi_powm(bn, y, q, p)
-#define bn_random(bn, num_bytes)    gcry_mpi_randomize(bn, num_bytes, GCRY_WEAK_RANDOM)
+#define bn_random(bn, num_bits)     gcry_mpi_randomize(bn, num_bits, GCRY_WEAK_RANDOM)
 #endif
 
 #define MAX_BYTES 18000
@@ -120,7 +136,7 @@ static FFBigNum dh_generate_key(FF_DH *dh)
     bn_new(dh->priv_key);
     if (!dh->priv_key)
         return NULL;
-    bn_random(dh->priv_key, num_bytes);
+    bn_random(dh->priv_key, 8 * num_bytes);
 
     bn_new(dh->pub_key);
     if (!dh->pub_key) {
@@ -137,11 +153,6 @@ static int dh_compute_key(FF_DH *dh, FFBigNum pub_key_bn,
                           uint32_t secret_key_len, uint8_t *secret_key)
 {
     FFBigNum k;
-    int num_bytes;
-
-    num_bytes = bn_num_bytes(dh->p);
-    if (num_bytes <= 0 || num_bytes > MAX_BYTES)
-        return -1;
 
     bn_new(k);
     if (!k)
@@ -157,6 +168,8 @@ static int dh_compute_key(FF_DH *dh, FFBigNum pub_key_bn,
 
 void ff_dh_free(FF_DH *dh)
 {
+    if (!dh)
+        return;
     bn_free(dh->p);
     bn_free(dh->g);
     bn_free(dh->pub_key);
@@ -200,6 +213,8 @@ static int dh_compute_key(FF_DH *dh, FFBigNum pub_key_bn,
 
 void ff_dh_free(FF_DH *dh)
 {
+    if (!dh)
+        return;
     DH_free(dh);
 }
 #endif
@@ -347,3 +362,141 @@ fail:
     return ret;
 }
 
+#ifdef TEST
+static int test_random_shared_secret(void)
+{
+    FF_DH *peer1 = NULL, *peer2 = NULL;
+    int ret;
+    uint8_t pubkey1[128], pubkey2[128];
+    uint8_t sharedkey1[128], sharedkey2[128];
+
+    peer1 = ff_dh_init(1024);
+    peer2 = ff_dh_init(1024);
+    if (!peer1 || !peer2) {
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+    if ((ret = ff_dh_generate_public_key(peer1)) < 0)
+        goto fail;
+    if ((ret = ff_dh_generate_public_key(peer2)) < 0)
+        goto fail;
+    if ((ret = ff_dh_write_public_key(peer1, pubkey1, sizeof(pubkey1))) < 0)
+        goto fail;
+    if ((ret = ff_dh_write_public_key(peer2, pubkey2, sizeof(pubkey2))) < 0)
+        goto fail;
+    if ((ret = ff_dh_compute_shared_secret_key(peer1, pubkey2, sizeof(pubkey2),
+                                               sharedkey1, sizeof(sharedkey1))) < 0)
+        goto fail;
+    if ((ret = ff_dh_compute_shared_secret_key(peer2, pubkey1, sizeof(pubkey1),
+                                               sharedkey2, sizeof(sharedkey2))) < 0)
+        goto fail;
+    if (memcmp(sharedkey1, sharedkey2, sizeof(sharedkey1))) {
+        printf("Mismatched generated shared key\n");
+        ret = AVERROR_INVALIDDATA;
+    } else {
+        printf("Generated shared key ok\n");
+    }
+fail:
+    ff_dh_free(peer1);
+    ff_dh_free(peer2);
+    return ret;
+}
+
+static const char *private_key =
+    "976C18FCADC255B456564F74F3EEDA59D28AF6B744D743F2357BFD2404797EF896EF1A"
+    "7C1CBEAAA3AB60AF3192D189CFF3F991C9CBBFD78119FCA2181384B94011943B6D6F28"
+    "9E1B708E2D1A0C7771169293F03DA27E561F15F16F0AC9BC858C77A80FA98FD088A232"
+    "19D08BE6F165DE0B02034B18705829FAD0ACB26A5B75EF";
+static const char *public_key =
+    "F272ECF8362257C5D2C3CC2229CF9C0A03225BC109B1DBC76A68C394F256ACA3EF5F64"
+    "FC270C26382BF315C19E97A76104A716FC998A651E8610A3AE6CF65D8FAE5D3F32EEA0"
+    "0B32CB9609B494116A825D7142D17B88E3D20EDD98743DE29CF37A23A9F6A58B960591"
+    "3157D5965FCB46DDA73A1F08DD897BAE88DFE6FC937CBA";
+static const uint8_t public_key_bin[] = {
+    0xf2, 0x72, 0xec, 0xf8, 0x36, 0x22, 0x57, 0xc5, 0xd2, 0xc3, 0xcc, 0x22,
+    0x29, 0xcf, 0x9c, 0x0a, 0x03, 0x22, 0x5b, 0xc1, 0x09, 0xb1, 0xdb, 0xc7,
+    0x6a, 0x68, 0xc3, 0x94, 0xf2, 0x56, 0xac, 0xa3, 0xef, 0x5f, 0x64, 0xfc,
+    0x27, 0x0c, 0x26, 0x38, 0x2b, 0xf3, 0x15, 0xc1, 0x9e, 0x97, 0xa7, 0x61,
+    0x04, 0xa7, 0x16, 0xfc, 0x99, 0x8a, 0x65, 0x1e, 0x86, 0x10, 0xa3, 0xae,
+    0x6c, 0xf6, 0x5d, 0x8f, 0xae, 0x5d, 0x3f, 0x32, 0xee, 0xa0, 0x0b, 0x32,
+    0xcb, 0x96, 0x09, 0xb4, 0x94, 0x11, 0x6a, 0x82, 0x5d, 0x71, 0x42, 0xd1,
+    0x7b, 0x88, 0xe3, 0xd2, 0x0e, 0xdd, 0x98, 0x74, 0x3d, 0xe2, 0x9c, 0xf3,
+    0x7a, 0x23, 0xa9, 0xf6, 0xa5, 0x8b, 0x96, 0x05, 0x91, 0x31, 0x57, 0xd5,
+    0x96, 0x5f, 0xcb, 0x46, 0xdd, 0xa7, 0x3a, 0x1f, 0x08, 0xdd, 0x89, 0x7b,
+    0xae, 0x88, 0xdf, 0xe6, 0xfc, 0x93, 0x7c, 0xba
+};
+static const uint8_t peer_public_key[] = {
+    0x58, 0x66, 0x05, 0x49, 0x94, 0x23, 0x2b, 0x66, 0x52, 0x13, 0xff, 0x46,
+    0xf2, 0xb3, 0x79, 0xa9, 0xee, 0xae, 0x1a, 0x13, 0xf0, 0x71, 0x52, 0xfb,
+    0x93, 0x4e, 0xee, 0x97, 0x05, 0x73, 0x50, 0x7d, 0xaf, 0x02, 0x07, 0x72,
+    0xac, 0xdc, 0xa3, 0x95, 0x78, 0xee, 0x9a, 0x19, 0x71, 0x7e, 0x99, 0x9f,
+    0x2a, 0xd4, 0xb3, 0xe2, 0x0c, 0x1d, 0x1a, 0x78, 0x4c, 0xde, 0xf1, 0xad,
+    0xb4, 0x60, 0xa8, 0x51, 0xac, 0x71, 0xec, 0x86, 0x70, 0xa2, 0x63, 0x36,
+    0x92, 0x7c, 0xe3, 0x87, 0xee, 0xe4, 0xf1, 0x62, 0x24, 0x74, 0xb4, 0x04,
+    0xfa, 0x5c, 0xdf, 0xba, 0xfa, 0xa3, 0xc2, 0xbb, 0x62, 0x27, 0xd0, 0xf4,
+    0xe4, 0x43, 0xda, 0x8a, 0x88, 0x69, 0x60, 0xe2, 0xdb, 0x75, 0x2a, 0x98,
+    0x9d, 0xb5, 0x50, 0xe3, 0x99, 0xda, 0xe0, 0xa6, 0x14, 0xc9, 0x80, 0x12,
+    0xf9, 0x3c, 0xac, 0x06, 0x02, 0x7a, 0xde, 0x74
+};
+static const uint8_t shared_secret[] = {
+    0xb2, 0xeb, 0xcb, 0x71, 0xf3, 0x61, 0xfb, 0x5b, 0x4e, 0x5c, 0x4c, 0xcf,
+    0x5c, 0x08, 0x5f, 0x96, 0x26, 0x77, 0x1d, 0x31, 0xf1, 0xe1, 0xf7, 0x4b,
+    0x92, 0xac, 0x82, 0x2a, 0x88, 0xc7, 0x83, 0xe1, 0xc7, 0xf3, 0xd3, 0x1a,
+    0x7d, 0xc8, 0x31, 0xe3, 0x97, 0xe4, 0xec, 0x31, 0x0e, 0x8f, 0x73, 0x1a,
+    0xe4, 0xf6, 0xd8, 0xc8, 0x94, 0xff, 0xa0, 0x03, 0x84, 0x03, 0x0f, 0xa5,
+    0x30, 0x5d, 0x67, 0xe0, 0x7a, 0x3b, 0x5f, 0xed, 0x4c, 0xf5, 0xbc, 0x18,
+    0xea, 0xd4, 0x77, 0xa9, 0x07, 0xb3, 0x54, 0x0b, 0x02, 0xd9, 0xc6, 0xb8,
+    0x66, 0x5e, 0xec, 0xa4, 0xcd, 0x47, 0xed, 0xc9, 0x38, 0xc6, 0x91, 0x08,
+    0xf3, 0x85, 0x9b, 0x69, 0x16, 0x78, 0x0d, 0xb7, 0x74, 0x51, 0xaa, 0x5b,
+    0x4d, 0x74, 0xe4, 0x29, 0x2e, 0x9e, 0x8e, 0xf7, 0xe5, 0x42, 0x83, 0xb0,
+    0x65, 0xb0, 0xce, 0xc6, 0xb2, 0x8f, 0x5b, 0xb0
+};
+
+static int test_ref_data(void)
+{
+    FF_DH *dh;
+    int ret = AVERROR(ENOMEM);
+    uint8_t pubkey_test[128];
+    uint8_t sharedkey_test[128];
+
+    dh = ff_dh_init(1024);
+    if (!dh)
+        goto fail;
+    bn_hex2bn(dh->priv_key, private_key, ret);
+    if (!ret)
+        goto fail;
+    bn_hex2bn(dh->pub_key, public_key, ret);
+    if (!ret)
+        goto fail;
+    if ((ret = ff_dh_write_public_key(dh, pubkey_test, sizeof(pubkey_test))) < 0)
+        goto fail;
+    if (memcmp(pubkey_test, public_key_bin, sizeof(pubkey_test))) {
+        printf("Mismatched generated public key\n");
+        ret = AVERROR_INVALIDDATA;
+        goto fail;
+    } else {
+        printf("Generated public key ok\n");
+    }
+    if ((ret = ff_dh_compute_shared_secret_key(dh, peer_public_key, sizeof(peer_public_key),
+                                               sharedkey_test, sizeof(sharedkey_test))) < 0)
+        goto fail;
+    if (memcmp(shared_secret, sharedkey_test, sizeof(sharedkey_test))) {
+        printf("Mismatched generated shared key\n");
+        ret = AVERROR_INVALIDDATA;
+    } else {
+        printf("Generated shared key ok\n");
+    }
+fail:
+    ff_dh_free(dh);
+    return ret;
+}
+
+int main(void)
+{
+    if (test_random_shared_secret() < 0)
+        return 1;
+    if (test_ref_data() < 0)
+        return 1;
+    return 0;
+}
+#endif