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adds PRAGMA cipher_settings to query current database codec settings

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This commit is contained in:
Stephen Lombardo
2019-01-15 13:40:56 -05:00
parent 42e655bf35
commit 034480aa76
2 changed files with 73 additions and 0 deletions
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src/crypto.c
+51
View File
@@ -534,6 +534,57 @@ int sqlcipher_codec_pragma(sqlite3* db, int iDb, Parse *pParse, const char *zLef
char *on = sqlite3_mprintf("%d", sqlcipher_get_mem_security());
codec_vdbe_return_string(pParse, "cipher_memory_security", on, P4_DYNAMIC);
}
}else
if( sqlite3StrICmp(zLeft,"cipher_settings")==0 ){
if(ctx) {
int algorithm;
char *pragma;
pragma = sqlite3_mprintf("PRAGMA kdf_iter = %d;", sqlcipher_codec_ctx_get_kdf_iter(ctx));
codec_vdbe_return_string(pParse, "pragma", pragma, P4_DYNAMIC);
pragma = sqlite3_mprintf("PRAGMA fast_kdf_iter = %d;", sqlcipher_codec_ctx_get_fast_kdf_iter(ctx));
codec_vdbe_return_string(pParse, "pragma", pragma, P4_DYNAMIC);
pragma = sqlite3_mprintf("PRAGMA cipher_page_size = %d;", sqlcipher_codec_ctx_get_pagesize(ctx));
codec_vdbe_return_string(pParse, "pragma", pragma, P4_DYNAMIC);
pragma = sqlite3_mprintf("PRAGMA cipher_use_hmac = %d;", sqlcipher_codec_ctx_get_use_hmac(ctx));
codec_vdbe_return_string(pParse, "pragma", pragma, P4_DYNAMIC);
if(sqlcipher_codec_ctx_get_flag(ctx, CIPHER_FLAG_LE_PGNO)) {
codec_vdbe_return_string(pParse, "pragma", "PRAGMA cipher_hmac_pgno = le;", P4_TRANSIENT);
} else if(sqlcipher_codec_ctx_get_flag(ctx, CIPHER_FLAG_BE_PGNO)) {
codec_vdbe_return_string(pParse, "pragma", "PRAGMA cipher_hmac_pgno = be;", P4_TRANSIENT);
} else {
codec_vdbe_return_string(pParse, "pragma", "PRAGMA cipher_hmac_pgno = native;", P4_TRANSIENT);
}
pragma = sqlite3_mprintf("PRAGMA cipher_hmac_salt_mask = %02x;", sqlcipher_get_hmac_salt_mask());
codec_vdbe_return_string(pParse, "pragma", pragma, P4_DYNAMIC);
pragma = sqlite3_mprintf("PRAGMA cipher_plaintext_header_size = %d;", sqlcipher_codec_ctx_get_plaintext_header_size(ctx));
codec_vdbe_return_string(pParse, "pragma", pragma, P4_DYNAMIC);
algorithm = sqlcipher_codec_ctx_get_hmac_algorithm(ctx);
pragma = NULL;
if(algorithm == SQLCIPHER_HMAC_SHA1) {
pragma = sqlite3_mprintf("PRAGMA cipher_hmac_algorithm = %s;", SQLCIPHER_HMAC_SHA1_LABEL);
} else if(algorithm == SQLCIPHER_HMAC_SHA256) {
pragma = sqlite3_mprintf("PRAGMA cipher_hmac_algorithm = %s;", SQLCIPHER_HMAC_SHA256_LABEL);
} else if(algorithm == SQLCIPHER_HMAC_SHA512) {
pragma = sqlite3_mprintf("PRAGMA cipher_hmac_algorithm = %s;", SQLCIPHER_HMAC_SHA512_LABEL);
}
codec_vdbe_return_string(pParse, "pragma", pragma, P4_DYNAMIC);
algorithm = sqlcipher_codec_ctx_get_kdf_algorithm(ctx);
pragma = NULL;
if(algorithm == SQLCIPHER_PBKDF2_HMAC_SHA1) {
pragma = sqlite3_mprintf("PRAGMA cipher_kdf_algorithm = %s;", SQLCIPHER_PBKDF2_HMAC_SHA1_LABEL);
} else if(algorithm == SQLCIPHER_PBKDF2_HMAC_SHA256) {
pragma = sqlite3_mprintf("PRAGMA cipher_kdf_algorithm = %s;", SQLCIPHER_PBKDF2_HMAC_SHA256_LABEL);
} else if(algorithm == SQLCIPHER_PBKDF2_HMAC_SHA512) {
pragma = sqlite3_mprintf("PRAGMA cipher_kdf_algorithm = %s;", SQLCIPHER_PBKDF2_HMAC_SHA512_LABEL);
}
codec_vdbe_return_string(pParse, "pragma", pragma, P4_DYNAMIC);
}
}else {
return 0;
}
test/sqlcipher-pragmas.test
+22
View File
@@ -245,6 +245,7 @@ do_test verify-pragma-hmac-salt-mask-reports-value-changed {
PRAGMA key = 'test';
PRAGMA cipher_hmac_salt_mask = "x'11'";
PRAGMA cipher_hmac_salt_mask;
PRAGMA cipher_hmac_salt_mask = "x'3a'";
}
} {11}
db close
@@ -376,4 +377,25 @@ if_built_with_commoncrypto verify-default-cipher {
db close
file delete -force test.db
do_test verify-cipher_settings_default {
sqlite_orig db test.db
execsql {
PRAGMA key = 'test';
PRAGMA cipher_settings;
}
} {{PRAGMA kdf_iter = 256000;} {PRAGMA fast_kdf_iter = 2;} {PRAGMA cipher_page_size = 4096;} {PRAGMA cipher_use_hmac = 1;} {PRAGMA cipher_hmac_pgno = le;} {PRAGMA cipher_hmac_salt_mask = 3a;} {PRAGMA cipher_plaintext_header_size = 0;} {PRAGMA cipher_hmac_algorithm = HMAC_SHA512;} {PRAGMA cipher_kdf_algorithm = PBKDF2_HMAC_SHA512;}}
db close
file delete -force test.db
do_test verify-cipher_settings_v1 {
sqlite_orig db test.db
execsql {
PRAGMA key = 'test';
PRAGMA cipher_compatibility = 1;
PRAGMA cipher_settings;
}
} {{PRAGMA kdf_iter = 4000;} {PRAGMA fast_kdf_iter = 2;} {PRAGMA cipher_page_size = 1024;} {PRAGMA cipher_use_hmac = 0;} {PRAGMA cipher_hmac_pgno = le;} {PRAGMA cipher_hmac_salt_mask = 3a;} {PRAGMA cipher_plaintext_header_size = 0;} {PRAGMA cipher_hmac_algorithm = HMAC_SHA1;} {PRAGMA cipher_kdf_algorithm = PBKDF2_HMAC_SHA1;}}
db close
file delete -force test.db
finish_test