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sqlcipher
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Support OpenSSL 1.1.0 and prior

This commit is contained in:
Nick Parker 2016-12-09 11:47:39 -06:00
parent bae72ae4e3
commit 939c83a007
1 changed files with 38 additions and 15 deletions
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53
src/crypto_openssl.c
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@ -46,6 +46,29 @@ static unsigned int openssl_external_init = 0;
static unsigned int openssl_init_count = 0;
static sqlite3_mutex* openssl_rand_mutex = NULL;
#if OPENSSL_VERSION_NUMBER < 0x10100000L
static HMAC_CTX *HMAC_CTX_new(void)
{
HMAC_CTX *ctx = OPENSSL_malloc(sizeof(*ctx));
if (ctx != NULL) {
HMAC_CTX_init(ctx);
}
return ctx;
}
// Per 1.1.0 (https://wiki.openssl.org/index.php/1.1_API_Changes)
// HMAC_CTX_free should call HMAC_CTX_cleanup, then EVP_MD_CTX_Cleanup.
// HMAC_CTX_cleanup internally calls EVP_MD_CTX_cleanup so these
// calls are not needed.
static void HMAC_CTX_free(HMAC_CTX *ctx)
{
if (ctx != NULL) {
HMAC_CTX_cleanup(ctx);
OPENSSL_free(ctx);
}
}
#endif
static int sqlcipher_openssl_add_random(void *ctx, void *buffer, int length) {
#ifndef SQLCIPHER_OPENSSL_NO_MUTEX_RAND
sqlite3_mutex_enter(openssl_rand_mutex);
@ -157,14 +180,14 @@ static int sqlcipher_openssl_random (void *ctx, void *buffer, int length) {
}
static int sqlcipher_openssl_hmac(void *ctx, unsigned char *hmac_key, int key_sz, unsigned char *in, int in_sz, unsigned char *in2, int in2_sz, unsigned char *out) {
HMAC_CTX hctx;
unsigned int outlen;
HMAC_CTX_init(&hctx);
HMAC_Init_ex(&hctx, hmac_key, key_sz, EVP_sha1(), NULL);
HMAC_Update(&hctx, in, in_sz);
HMAC_Update(&hctx, in2, in2_sz);
HMAC_Final(&hctx, out, &outlen);
HMAC_CTX_cleanup(&hctx);
HMAC_CTX* hctx = HMAC_CTX_new();
if(hctx == NULL) return SQLITE_ERROR;
HMAC_Init_ex(hctx, hmac_key, key_sz, EVP_sha1(), NULL);
HMAC_Update(hctx, in, in_sz);
HMAC_Update(hctx, in2, in2_sz);
HMAC_Final(hctx, out, &outlen);
HMAC_CTX_free(hctx);
return SQLITE_OK;
}
@ -174,18 +197,18 @@ static int sqlcipher_openssl_kdf(void *ctx, const unsigned char *pass, int pass_
}
static int sqlcipher_openssl_cipher(void *ctx, int mode, unsigned char *key, int key_sz, unsigned char *iv, unsigned char *in, int in_sz, unsigned char *out) {
EVP_CIPHER_CTX ectx;
int tmp_csz, csz;
EVP_CipherInit(&ectx, ((openssl_ctx *)ctx)->evp_cipher, NULL, NULL, mode);
EVP_CIPHER_CTX_set_padding(&ectx, 0); // no padding
EVP_CipherInit(&ectx, NULL, key, iv, mode);
EVP_CipherUpdate(&ectx, out, &tmp_csz, in, in_sz);
EVP_CIPHER_CTX* ectx = EVP_CIPHER_CTX_new();
if(ectx == NULL) return SQLITE_ERROR;
EVP_CipherInit_ex(ectx, ((openssl_ctx *)ctx)->evp_cipher, NULL, NULL, NULL, mode);
EVP_CIPHER_CTX_set_padding(ectx, 0); // no padding
EVP_CipherInit_ex(ectx, NULL, NULL, key, iv, mode);
EVP_CipherUpdate(ectx, out, &tmp_csz, in, in_sz);
csz = tmp_csz;
out += tmp_csz;
EVP_CipherFinal(&ectx, out, &tmp_csz);
EVP_CipherFinal_ex(ectx, out, &tmp_csz);
csz += tmp_csz;
EVP_CIPHER_CTX_cleanup(&ectx);
EVP_CIPHER_CTX_free(ectx);
assert(in_sz == csz);
return SQLITE_OK;
}