1 /* Copyright (c) 2014, Google Inc. 2 * 3 * Permission to use, copy, modify, and/or distribute this software for any 4 * purpose with or without fee is hereby granted, provided that the above 5 * copyright notice and this permission notice appear in all copies. 6 * 7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ 14 15 #include <stdio.h> 16 #include <string.h> 17 18 #include <openssl/base64.h> 19 #include <openssl/crypto.h> 20 #include <openssl/err.h> 21 22 23 typedef struct { 24 const char *decoded; 25 const char *encoded; 26 } TEST_VECTOR; 27 28 /* Test vectors from RFC 4648. */ 29 static const TEST_VECTOR test_vectors[] = { 30 { "", "" }, 31 { "f" , "Zg==" }, 32 { "fo", "Zm8=" }, 33 { "foo", "Zm9v" }, 34 { "foob", "Zm9vYg==" }, 35 { "fooba", "Zm9vYmE=" }, 36 { "foobar", "Zm9vYmFy" }, 37 }; 38 39 static const size_t kNumTests = sizeof(test_vectors) / sizeof(test_vectors[0]); 40 41 static int test_encode(void) { 42 uint8_t out[9]; 43 size_t i; 44 ssize_t len; 45 46 for (i = 0; i < kNumTests; i++) { 47 const TEST_VECTOR *t = &test_vectors[i]; 48 len = EVP_EncodeBlock(out, (const uint8_t*)t->decoded, strlen(t->decoded)); 49 if (len != strlen(t->encoded) || 50 memcmp(out, t->encoded, len) != 0) { 51 fprintf(stderr, "encode(\"%s\") = \"%.*s\", want \"%s\"\n", 52 t->decoded, (int)len, (const char*)out, t->encoded); 53 return 0; 54 } 55 } 56 return 1; 57 } 58 59 static int test_decode(void) { 60 uint8_t out[6]; 61 size_t i, len; 62 int ret; 63 64 for (i = 0; i < kNumTests; i++) { 65 /* Test the normal API. */ 66 const TEST_VECTOR *t = &test_vectors[i]; 67 size_t expected_len = strlen(t->decoded); 68 if (!EVP_DecodeBase64(out, &len, sizeof(out), 69 (const uint8_t*)t->encoded, strlen(t->encoded))) { 70 fprintf(stderr, "decode(\"%s\") failed\n", t->encoded); 71 return 0; 72 } 73 if (len != strlen(t->decoded) || 74 memcmp(out, t->decoded, len) != 0) { 75 fprintf(stderr, "decode(\"%s\") = \"%.*s\", want \"%s\"\n", 76 t->encoded, (int)len, (const char*)out, t->decoded); 77 return 0; 78 } 79 80 /* Test that the padding behavior of the deprecated API is 81 * preserved. */ 82 ret = EVP_DecodeBlock(out, (const uint8_t*)t->encoded, strlen(t->encoded)); 83 if (ret < 0) { 84 fprintf(stderr, "decode(\"%s\") failed\n", t->encoded); 85 return 0; 86 } 87 if (ret % 3 != 0) { 88 fprintf(stderr, "EVP_DecodeBlock did not ignore padding\n"); 89 return 0; 90 } 91 if (expected_len % 3 != 0) { 92 ret -= 3 - (expected_len % 3); 93 } 94 if (ret != strlen(t->decoded) || 95 memcmp(out, t->decoded, ret) != 0) { 96 fprintf(stderr, "decode(\"%s\") = \"%.*s\", want \"%s\"\n", 97 t->encoded, ret, (const char*)out, t->decoded); 98 return 0; 99 } 100 } 101 102 if (EVP_DecodeBase64(out, &len, sizeof(out), (const uint8_t*)"a!bc", 4)) { 103 fprintf(stderr, "Failed to reject invalid characters in the middle.\n"); 104 return 0; 105 } 106 107 if (EVP_DecodeBase64(out, &len, sizeof(out), (const uint8_t*)"a=bc", 4)) { 108 fprintf(stderr, "Failed to reject invalid characters in the middle.\n"); 109 return 0; 110 } 111 112 if (EVP_DecodeBase64(out, &len, sizeof(out), (const uint8_t*)"abc", 4)) { 113 fprintf(stderr, "Failed to reject invalid input length.\n"); 114 return 0; 115 } 116 117 return 1; 118 } 119 120 int main(void) { 121 CRYPTO_library_init(); 122 ERR_load_crypto_strings(); 123 124 if (!test_encode()) { 125 return 1; 126 } 127 128 if (!test_decode()) { 129 return 1; 130 } 131 132 printf("PASS\n"); 133 return 0; 134 } 135
