/*void RSAPublicKeyFree(RSAPublicKey* key) { if (key) { if (key->n) free(key->n); if (key->rr) free(key->rr); free(key); } } */ RSAPublicKey RSAPublicKeyFromBuf(const uint8_t* buf, uint64_t len) { // RSAPublicKey* key = RSAPublicKeyNew(); RSAPublicKey key; MemcpyState st; uint64_t key_len; StatefulInit(&st, (void*)buf, len); StatefulMemcpy(&st, &key.len, sizeof(key.len)); key_len = key.len * sizeof(uint32_t); /* key length in bytes. */ /* Sanity Check the key length. */ /* if (RSA1024NUMBYTES != key_len && RSA2048NUMBYTES != key_len && RSA4096NUMBYTES != key_len && RSA8192NUMBYTES != key_len) { // RSAPublicKeyFree(key); // return NULL; } */ // key->n = (uint32_t*) malloc(key_len); // key->rr = (uint32_t*) malloc(key_len); StatefulMemcpy(&st, &key.n0inv, sizeof(key.n0inv)); StatefulMemcpy(&st, key.n, key_len); StatefulMemcpy(&st, key.rr, key_len); // if (st.overrun || st.remaining_len != 0) { /* Underrun or overrun. */ // RSAPublicKeyFree(key); // return NULL; // } return key; }
RSAPublicKey* RSAPublicKeyFromBuf(const uint8_t* buf, int len) { RSAPublicKey* key = (RSAPublicKey*) Malloc(sizeof(RSAPublicKey)); MemcpyState st; int key_len; st.remaining_buf = (uint8_t*) buf; st.remaining_len = len; StatefulMemcpy(&st, &key->len, sizeof(key->len)); key_len = key->len * sizeof(uint32_t); /* key length in bytes. */ key->n = (uint32_t*) Malloc(key_len); key->rr = (uint32_t*) Malloc(key_len); StatefulMemcpy(&st, &key->n0inv, sizeof(key->n0inv)); StatefulMemcpy(&st, key->n, key_len); StatefulMemcpy(&st, key->rr, key_len); if (st.remaining_len != 0) { /* Underrun or overrun. */ Free(key->n); Free(key->rr); Free(key); return NULL; } return key; }
/* Test StatefulMemcpy */ static void StatefulMemcpyTest(void) { MemcpyState s; char buf[129]; char want[129]; char* src1 = "ThisIsATest"; char* src2 = "ThisIsOnlyATest"; memset(want, 0, sizeof(want)); memset(buf, 0, sizeof(buf)); /* Small copies */ StatefulInit(&s, src1, 12); TEST_PTR_EQ(buf, StatefulMemcpy(&s, buf, 6), "StatefulMemcpy(6) retval"); TEST_EQ(6, s.remaining_len, "StatefulMemcpy(6) len"); TEST_PTR_EQ(src1 + 6, s.remaining_buf, "StatefulMemcpy(6) buf"); /* Using strcmp() is a convenient way to check that we didn't * overwrite the 0-byte following what we expected to copy. */ TEST_EQ(0, strcmp("ThisIs", buf), "StatefulMemcpy(6) contents"); TEST_EQ(0, s.overrun, "StatefulMemcpy(6) overrun"); TEST_PTR_EQ(buf, StatefulMemcpy(&s, buf, 5), "StatefulMemcpy(5) retval"); /* Note that we shouldn't have copied the last byte out of the * stateful buffer, so we don't overwrite the last character of the * string that was in buf. */ TEST_EQ(0, strcmp("ATests", buf), "StatefulMemcpy(5) contents"); /* Use entire buffer */ memset(buf, 1, sizeof(buf)); StatefulInit(&s, src2, 16); TEST_PTR_EQ(buf, StatefulMemcpy(&s, buf, 16), "StatefulMemcpy(all) retval"); TEST_EQ(0, s.remaining_len, "StatefulMemcpy(all) len"); TEST_PTR_EQ(src2 + 16, s.remaining_buf, "StatefulMemcpy(all) buf"); TEST_EQ(0, s.overrun, "StatefulMemcpy(all) overrun"); TEST_EQ(0, strcmp(src2, buf), "StatefulMemcpy(all) contents"); /* Zero-length copy is ok (but meaningless) */ TEST_PTR_EQ(buf, StatefulMemcpy(&s, buf, 0), "StatefulMemcpy(0) retval"); TEST_EQ(0, s.remaining_len, "StatefulMemcpy(0) len"); TEST_PTR_EQ(src2 + 16, s.remaining_buf, "StatefulMemcpy(0) buf"); TEST_EQ(0, s.overrun, "StatefulMemcpy(0) overrun"); TEST_EQ(0, strcmp(src2, buf), "StatefulMemcpy(0) contents"); /* Can't use even one byte past that */ TEST_PTR_EQ(NULL, StatefulMemcpy(&s, buf, 1), "StatefulMemcpy(+1) retval"); TEST_EQ(0, s.remaining_len, "StatefulMemcpy(+1) len"); TEST_EQ(1, s.overrun, "StatefulMemcpy(+1) overrun"); TEST_EQ(0, strcmp(src2, buf), "StatefulMemcpy(+1) contents"); /* Overrun */ memset(buf, 0, sizeof(buf)); StatefulInit(&s, "Small", 5); TEST_PTR_EQ(NULL, StatefulMemcpy(&s, buf, 9), "StatefulMemcpy(9) retval"); TEST_EQ(1, s.overrun, "StatefulMemcpy(9) overrun"); /* Once overrun, always overrun, even if we now ask for a small skip */ TEST_PTR_EQ(NULL, StatefulMemcpy(&s, buf, 4), "StatefulMemcpy(9+1) retval"); TEST_EQ(1, s.overrun, "StatefulMemcpy(9+1) overrun"); TEST_EQ(0, memcmp(want, buf, sizeof(want)), "StatefulMemcpy(+1) contents"); /* Overrun with potential wraparound */ StatefulInit(&s, "Larger", 6); TEST_PTR_EQ(NULL, StatefulMemcpy(&s, buf, -1), "StatefulMemcpy(-1) retval"); TEST_EQ(1, s.overrun, "StatefulMemcpy(-1) overrun"); TEST_EQ(0, memcmp(want, buf, sizeof(want)), "StatefulMemcpy(+1) contents"); }