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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| #include <stdlib.h> | ||
| #include <stdint.h> | ||
| #include "fuzzer/FuzzedDataProvider.h" | ||
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| #define MBEDTLS_CHECK_RETURN_TYPICAL | ||
| #include "../src/lib/third_party/include/gcrypt/aes.h" | ||
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| extern int force_no_aesni; | ||
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| extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { | ||
| FuzzedDataProvider fuzzed_data(data, size); | ||
| mbedtls_aes_context *ctx; | ||
| int key_lens[] = { 128, 192, 256, 512 /* invalid */ }; | ||
| unsigned char *input, *output, *key; | ||
| int i, key_len, mode, rc; | ||
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| /* No real memory allocations involved */ | ||
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| if(fuzzed_data.remaining_bytes() < 1 + 1 + 4 + 512 / 8 + 16) | ||
| return -1; | ||
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| posix_memalign((void **)&input, 8, 16); | ||
| posix_memalign((void **)&output, 8, 16); | ||
| posix_memalign((void **)&key, 8, 512 / 8); | ||
| ctx = (mbedtls_aes_context *)malloc(sizeof(mbedtls_aes_context)); | ||
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| force_no_aesni = 0; | ||
| if(fuzzed_data.ConsumeBool()) | ||
| force_no_aesni = 1; | ||
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| mode = MBEDTLS_AES_ENCRYPT; | ||
| if(fuzzed_data.ConsumeBool()) | ||
| mode = MBEDTLS_AES_DECRYPT; | ||
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| mbedtls_aes_init(ctx); | ||
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| key_len = fuzzed_data.PickValueInArray(key_lens); | ||
| std::vector<unsigned char>k = fuzzed_data.ConsumeBytes<u_int8_t>(key_len / 8); | ||
| std::vector<u_int8_t>in = fuzzed_data.ConsumeBytes<uint8_t>(16); | ||
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| for(i = 0; i < 16; i++) | ||
| input[i] = in[i]; | ||
| for(i = 0; i < key_len / 8; i++) | ||
| key[i] = k[i]; | ||
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| if(mode == MBEDTLS_AES_ENCRYPT) | ||
| rc = mbedtls_aes_setkey_enc(ctx, key, key_len); | ||
| else | ||
| rc = mbedtls_aes_setkey_dec(ctx, key, key_len); | ||
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| if(rc == 0) | ||
| mbedtls_aes_crypt_ecb(ctx, mode, input, output); | ||
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| mbedtls_aes_free(ctx); | ||
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| free(ctx); | ||
| free(key); | ||
| free(input); | ||
| free(output); | ||
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| return 0; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| #include <stdlib.h> | ||
| #include <stdint.h> | ||
| #include <assert.h> | ||
| #include "fuzzer/FuzzedDataProvider.h" | ||
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| #define MBEDTLS_CHECK_RETURN_TYPICAL | ||
| #define MBEDTLS_INTERNAL_VALIDATE_RET( cond, ret ) do { } while( 0 ) | ||
| #include "../src/lib/third_party/include/gcrypt/aes.h" | ||
| #include "../src/lib/third_party/include/gcrypt/cipher.h" | ||
| #include "../src/lib/third_party/include/gcrypt/gcm.h" | ||
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| extern int force_no_aesni; | ||
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| extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { | ||
| FuzzedDataProvider fuzzed_data(data, size); | ||
| mbedtls_aes_context *aes_e_ctx, *aes_d_ctx; | ||
| mbedtls_gcm_context *gcm_e_ctx, *gcm_d_ctx; | ||
| int key_lens[] = { 128, 192, 256, 512 /* invalid */ }; | ||
| unsigned char *output, *decrypted; | ||
| int key_len, rc_e, rc_d; | ||
| mbedtls_cipher_id_t cipher; | ||
| unsigned char *tag; | ||
| int iv_len, tag_len, input_length; | ||
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| /* No real memory allocations involved */ | ||
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| if(fuzzed_data.remaining_bytes() < 1 + 4 + 512 / 8 + | ||
| 1 + 64 + /* iv */ | ||
| 1 + /* tag_len */ | ||
| 1 + 64 + /* input */ | ||
| 1 /* useless data: to be able to add the check with assert */) | ||
| return -1; | ||
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| gcm_e_ctx = (mbedtls_gcm_context *)malloc(sizeof(mbedtls_gcm_context)); | ||
| gcm_d_ctx = (mbedtls_gcm_context *)malloc(sizeof(mbedtls_gcm_context)); | ||
| aes_e_ctx = (mbedtls_aes_context *)malloc(sizeof(mbedtls_aes_context)); | ||
| aes_d_ctx = (mbedtls_aes_context *)malloc(sizeof(mbedtls_aes_context)); | ||
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| /* Not sure if it is really necessary... */ | ||
| force_no_aesni = 0; | ||
| if(fuzzed_data.ConsumeBool()) | ||
| force_no_aesni = 1; | ||
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| key_len = fuzzed_data.PickValueInArray(key_lens); | ||
| std::vector<unsigned char>key = fuzzed_data.ConsumeBytes<u_int8_t>(key_len / 8); | ||
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| iv_len = fuzzed_data.ConsumeIntegralInRange(0, 64); | ||
| std::vector<u_int8_t>iv = fuzzed_data.ConsumeBytes<uint8_t>(iv_len); | ||
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| tag_len = fuzzed_data.ConsumeIntegralInRange(0, 17); | ||
| tag = (unsigned char *)malloc(tag_len); | ||
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| input_length = fuzzed_data.ConsumeIntegralInRange(16, 64); | ||
| std::vector<unsigned char>input = fuzzed_data.ConsumeBytes<u_int8_t>(input_length); | ||
| output = (unsigned char *)malloc(input_length); | ||
| decrypted = (unsigned char *)malloc(input_length); | ||
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| cipher = static_cast<mbedtls_cipher_id_t>(fuzzed_data.ConsumeIntegralInRange(0, (int)MBEDTLS_CIPHER_ID_CHACHA20)); | ||
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| assert(fuzzed_data.remaining_bytes() > 0); | ||
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| mbedtls_gcm_init(gcm_e_ctx, aes_e_ctx); | ||
| mbedtls_gcm_init(gcm_d_ctx, aes_d_ctx); | ||
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| rc_e = mbedtls_gcm_setkey(gcm_e_ctx, cipher, key.data(), key.size() * 8); | ||
| rc_d = mbedtls_gcm_setkey(gcm_d_ctx, cipher, key.data(), key.size() * 8); | ||
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| if (rc_e == 0 && rc_d == 0) { | ||
| rc_e = mbedtls_gcm_crypt_and_tag(gcm_e_ctx, MBEDTLS_GCM_ENCRYPT, | ||
| input.size(), | ||
| iv.data(), iv.size(), | ||
| NULL, 0, /* TODO */ | ||
| input.data(), | ||
| output, | ||
| tag_len, tag); | ||
| if(rc_e == 0) { | ||
| rc_d = mbedtls_gcm_auth_decrypt(gcm_d_ctx, | ||
| input.size(), | ||
| iv.data(), iv.size(), | ||
| NULL, 0, /* TODO */ | ||
| tag, tag_len, | ||
| output, | ||
| decrypted); | ||
| if (rc_d == 0) | ||
| assert(memcmp(input.data(), decrypted, input.size()) == 0); | ||
| } | ||
| } | ||
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| mbedtls_gcm_free(gcm_e_ctx); | ||
| mbedtls_gcm_free(gcm_d_ctx); | ||
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| free(tag); | ||
| free(gcm_e_ctx); | ||
| free(gcm_d_ctx); | ||
| free(aes_e_ctx); | ||
| free(aes_d_ctx); | ||
| free(output); | ||
| free(decrypted); | ||
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| return 0; | ||
| } |
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