mirror of
https://github.com/ncruces/go-sqlite3.git
synced 2026-01-12 14:09:13 +00:00
99 lines
2.6 KiB
Go
99 lines
2.6 KiB
Go
// Package hash provides cryptographic hash functions.
|
|
//
|
|
// Provided functions:
|
|
// - md4(data)
|
|
// - md5(data)
|
|
// - sha1(data)
|
|
// - sha3(data, size) (default size 256)
|
|
// - sha224(data)
|
|
// - sha256(data, size) (default size 256)
|
|
// - sha384(data)
|
|
// - sha512(data, size) (default size 512)
|
|
// - blake2s(data)
|
|
// - blake2b(data, size) (default size 512)
|
|
// - ripemd160(data)
|
|
//
|
|
// Each SQL function will only be registered if the corresponding
|
|
// [crypto.Hash] function is available.
|
|
// To ensure a specific hash function is available,
|
|
// import the implementing package.
|
|
package hash
|
|
|
|
import (
|
|
"crypto"
|
|
|
|
"github.com/ncruces/go-sqlite3"
|
|
)
|
|
|
|
// Register registers cryptographic hash functions for a database connection.
|
|
func Register(db *sqlite3.Conn) {
|
|
flags := sqlite3.DETERMINISTIC | sqlite3.INNOCUOUS
|
|
|
|
if crypto.MD4.Available() {
|
|
db.CreateFunction("md4", 1, flags, md4Func)
|
|
}
|
|
if crypto.MD5.Available() {
|
|
db.CreateFunction("md5", 1, flags, md5Func)
|
|
}
|
|
if crypto.SHA1.Available() {
|
|
db.CreateFunction("sha1", 1, flags, sha1Func)
|
|
}
|
|
if crypto.SHA3_512.Available() {
|
|
db.CreateFunction("sha3", 1, flags, sha3Func)
|
|
db.CreateFunction("sha3", 2, flags, sha3Func)
|
|
}
|
|
if crypto.SHA256.Available() {
|
|
db.CreateFunction("sha224", 1, flags, sha224Func)
|
|
db.CreateFunction("sha256", 1, flags, sha256Func)
|
|
db.CreateFunction("sha256", 2, flags, sha256Func)
|
|
}
|
|
if crypto.SHA512.Available() {
|
|
db.CreateFunction("sha384", 1, flags, sha384Func)
|
|
db.CreateFunction("sha512", 1, flags, sha512Func)
|
|
db.CreateFunction("sha512", 2, flags, sha512Func)
|
|
}
|
|
if crypto.BLAKE2s_256.Available() {
|
|
db.CreateFunction("blake2s", 1, flags, blake2sFunc)
|
|
}
|
|
if crypto.BLAKE2b_512.Available() {
|
|
db.CreateFunction("blake2b", 1, flags, blake2bFunc)
|
|
db.CreateFunction("blake2b", 2, flags, blake2bFunc)
|
|
}
|
|
if crypto.RIPEMD160.Available() {
|
|
db.CreateFunction("ripemd160", 1, flags, ripemd160Func)
|
|
}
|
|
}
|
|
|
|
func md4Func(ctx sqlite3.Context, arg ...sqlite3.Value) {
|
|
hashFunc(ctx, arg[0], crypto.MD4)
|
|
}
|
|
|
|
func md5Func(ctx sqlite3.Context, arg ...sqlite3.Value) {
|
|
hashFunc(ctx, arg[0], crypto.MD5)
|
|
}
|
|
|
|
func sha1Func(ctx sqlite3.Context, arg ...sqlite3.Value) {
|
|
hashFunc(ctx, arg[0], crypto.SHA1)
|
|
}
|
|
|
|
func ripemd160Func(ctx sqlite3.Context, arg ...sqlite3.Value) {
|
|
hashFunc(ctx, arg[0], crypto.RIPEMD160)
|
|
}
|
|
|
|
func hashFunc(ctx sqlite3.Context, arg sqlite3.Value, fn crypto.Hash) {
|
|
var data []byte
|
|
switch arg.Type() {
|
|
case sqlite3.NULL:
|
|
return
|
|
case sqlite3.BLOB:
|
|
data = arg.RawBlob()
|
|
default:
|
|
data = arg.RawText()
|
|
}
|
|
|
|
h := fn.New()
|
|
h.Write(data)
|
|
var res [64]byte
|
|
ctx.ResultBlob(h.Sum(res[:0]))
|
|
}
|