| 1 | /*
|
|---|
| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
|
|---|
| 3 | *
|
|---|
| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
|
|---|
| 5 | * this file except in compliance with the License. You can obtain a copy
|
|---|
| 6 | * in the file LICENSE in the source distribution or at
|
|---|
| 7 | * https://www.openssl.org/source/license.html
|
|---|
| 8 | */
|
|---|
| 9 |
|
|---|
| 10 | #include <stdio.h>
|
|---|
| 11 | #include "internal/cryptlib.h"
|
|---|
| 12 | #include <openssl/x509.h>
|
|---|
| 13 | #include <openssl/objects.h>
|
|---|
| 14 | #include <openssl/evp.h>
|
|---|
| 15 | #include <openssl/ui.h>
|
|---|
| 16 |
|
|---|
| 17 | #ifndef OPENSSL_NO_UI
|
|---|
| 18 | /* should be init to zeros. */
|
|---|
| 19 | static char prompt_string[80];
|
|---|
| 20 |
|
|---|
| 21 | void EVP_set_pw_prompt(const char *prompt)
|
|---|
| 22 | {
|
|---|
| 23 | if (prompt == NULL)
|
|---|
| 24 | prompt_string[0] = '\0';
|
|---|
| 25 | else {
|
|---|
| 26 | strncpy(prompt_string, prompt, 79);
|
|---|
| 27 | prompt_string[79] = '\0';
|
|---|
| 28 | }
|
|---|
| 29 | }
|
|---|
| 30 |
|
|---|
| 31 | char *EVP_get_pw_prompt(void)
|
|---|
| 32 | {
|
|---|
| 33 | if (prompt_string[0] == '\0')
|
|---|
| 34 | return (NULL);
|
|---|
| 35 | else
|
|---|
| 36 | return (prompt_string);
|
|---|
| 37 | }
|
|---|
| 38 |
|
|---|
| 39 | /*
|
|---|
| 40 | * For historical reasons, the standard function for reading passwords is in
|
|---|
| 41 | * the DES library -- if someone ever wants to disable DES, this function
|
|---|
| 42 | * will fail
|
|---|
| 43 | */
|
|---|
| 44 | int EVP_read_pw_string(char *buf, int len, const char *prompt, int verify)
|
|---|
| 45 | {
|
|---|
| 46 | return EVP_read_pw_string_min(buf, 0, len, prompt, verify);
|
|---|
| 47 | }
|
|---|
| 48 |
|
|---|
| 49 | int EVP_read_pw_string_min(char *buf, int min, int len, const char *prompt,
|
|---|
| 50 | int verify)
|
|---|
| 51 | {
|
|---|
| 52 | int ret = -1;
|
|---|
| 53 | char buff[BUFSIZ];
|
|---|
| 54 | UI *ui;
|
|---|
| 55 |
|
|---|
| 56 | if ((prompt == NULL) && (prompt_string[0] != '\0'))
|
|---|
| 57 | prompt = prompt_string;
|
|---|
| 58 | ui = UI_new();
|
|---|
| 59 | if (ui == NULL)
|
|---|
| 60 | return ret;
|
|---|
| 61 | if (UI_add_input_string(ui, prompt, 0, buf, min,
|
|---|
| 62 | (len >= BUFSIZ) ? BUFSIZ - 1 : len) < 0
|
|---|
| 63 | || (verify
|
|---|
| 64 | && UI_add_verify_string(ui, prompt, 0, buff, min,
|
|---|
| 65 | (len >= BUFSIZ) ? BUFSIZ - 1 : len,
|
|---|
| 66 | buf) < 0))
|
|---|
| 67 | goto end;
|
|---|
| 68 | ret = UI_process(ui);
|
|---|
| 69 | OPENSSL_cleanse(buff, BUFSIZ);
|
|---|
| 70 | end:
|
|---|
| 71 | UI_free(ui);
|
|---|
| 72 | return ret;
|
|---|
| 73 | }
|
|---|
| 74 | #endif /* OPENSSL_NO_UI */
|
|---|
| 75 |
|
|---|
| 76 | int EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md,
|
|---|
| 77 | const unsigned char *salt, const unsigned char *data,
|
|---|
| 78 | int datal, int count, unsigned char *key,
|
|---|
| 79 | unsigned char *iv)
|
|---|
| 80 | {
|
|---|
| 81 | EVP_MD_CTX *c;
|
|---|
| 82 | unsigned char md_buf[EVP_MAX_MD_SIZE];
|
|---|
| 83 | int niv, nkey, addmd = 0;
|
|---|
| 84 | unsigned int mds = 0, i;
|
|---|
| 85 | int rv = 0;
|
|---|
| 86 | nkey = EVP_CIPHER_key_length(type);
|
|---|
| 87 | niv = EVP_CIPHER_iv_length(type);
|
|---|
| 88 | OPENSSL_assert(nkey <= EVP_MAX_KEY_LENGTH);
|
|---|
| 89 | OPENSSL_assert(niv <= EVP_MAX_IV_LENGTH);
|
|---|
| 90 |
|
|---|
| 91 | if (data == NULL)
|
|---|
| 92 | return (nkey);
|
|---|
| 93 |
|
|---|
| 94 | c = EVP_MD_CTX_new();
|
|---|
| 95 | if (c == NULL)
|
|---|
| 96 | goto err;
|
|---|
| 97 | for (;;) {
|
|---|
| 98 | if (!EVP_DigestInit_ex(c, md, NULL))
|
|---|
| 99 | goto err;
|
|---|
| 100 | if (addmd++)
|
|---|
| 101 | if (!EVP_DigestUpdate(c, &(md_buf[0]), mds))
|
|---|
| 102 | goto err;
|
|---|
| 103 | if (!EVP_DigestUpdate(c, data, datal))
|
|---|
| 104 | goto err;
|
|---|
| 105 | if (salt != NULL)
|
|---|
| 106 | if (!EVP_DigestUpdate(c, salt, PKCS5_SALT_LEN))
|
|---|
| 107 | goto err;
|
|---|
| 108 | if (!EVP_DigestFinal_ex(c, &(md_buf[0]), &mds))
|
|---|
| 109 | goto err;
|
|---|
| 110 |
|
|---|
| 111 | for (i = 1; i < (unsigned int)count; i++) {
|
|---|
| 112 | if (!EVP_DigestInit_ex(c, md, NULL))
|
|---|
| 113 | goto err;
|
|---|
| 114 | if (!EVP_DigestUpdate(c, &(md_buf[0]), mds))
|
|---|
| 115 | goto err;
|
|---|
| 116 | if (!EVP_DigestFinal_ex(c, &(md_buf[0]), &mds))
|
|---|
| 117 | goto err;
|
|---|
| 118 | }
|
|---|
| 119 | i = 0;
|
|---|
| 120 | if (nkey) {
|
|---|
| 121 | for (;;) {
|
|---|
| 122 | if (nkey == 0)
|
|---|
| 123 | break;
|
|---|
| 124 | if (i == mds)
|
|---|
| 125 | break;
|
|---|
| 126 | if (key != NULL)
|
|---|
| 127 | *(key++) = md_buf[i];
|
|---|
| 128 | nkey--;
|
|---|
| 129 | i++;
|
|---|
| 130 | }
|
|---|
| 131 | }
|
|---|
| 132 | if (niv && (i != mds)) {
|
|---|
| 133 | for (;;) {
|
|---|
| 134 | if (niv == 0)
|
|---|
| 135 | break;
|
|---|
| 136 | if (i == mds)
|
|---|
| 137 | break;
|
|---|
| 138 | if (iv != NULL)
|
|---|
| 139 | *(iv++) = md_buf[i];
|
|---|
| 140 | niv--;
|
|---|
| 141 | i++;
|
|---|
| 142 | }
|
|---|
| 143 | }
|
|---|
| 144 | if ((nkey == 0) && (niv == 0))
|
|---|
| 145 | break;
|
|---|
| 146 | }
|
|---|
| 147 | rv = EVP_CIPHER_key_length(type);
|
|---|
| 148 | err:
|
|---|
| 149 | EVP_MD_CTX_free(c);
|
|---|
| 150 | OPENSSL_cleanse(md_buf, sizeof(md_buf));
|
|---|
| 151 | return rv;
|
|---|
| 152 | }
|
|---|
