Adam Van Ymeren
7a04f298d2
- update to latest telegram layer - remove some references to fields in tg.Entities that don't exist in the schema - originally added here: https://github.com/beeper/td/commit/820929062a2ba0104397bc01235ab58a9cff780e - referenced here - https://github.com/mautrix/telegramgo/commit/124f0967ed195b5a380c9bd02e170ada9710dde3 - https://github.com/mautrix/telegramgo/commit/4205047aab2e0639217148b5d125bfaab668bd8e
54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
package crypto
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import (
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"io"
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"go.mau.fi/mautrix-telegram/pkg/gotd/bin"
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)
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// RandInt64n returns random int64 from randSource in [0; n).
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func RandInt64n(randSource io.Reader, n int64) (int64, error) {
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v, err := RandInt64(randSource)
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if err != nil {
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return 0, err
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}
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if v < 0 {
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v *= -1
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}
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return v % n, nil
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}
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// RandInt64 returns random int64 from randSource.
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func RandInt64(randSource io.Reader) (int64, error) {
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var buf [bin.Word * 2]byte
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if _, err := io.ReadFull(randSource, buf[:]); err != nil {
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return 0, err
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}
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b := &bin.Buffer{Buf: buf[:]}
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return b.Long()
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}
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// RandInt128 generates and returns new random 128-bit integer.
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//
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// Use crypto/rand.Reader as randSource in production.
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func RandInt128(randSource io.Reader) (bin.Int128, error) {
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var buf [bin.Word * 4]byte
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if _, err := io.ReadFull(randSource, buf[:]); err != nil {
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return bin.Int128{}, err
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}
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b := &bin.Buffer{Buf: buf[:]}
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return b.Int128()
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}
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// RandInt256 generates and returns new random 256-bit integer.
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//
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// Use crypto/rand.Reader as randSource in production.
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func RandInt256(randSource io.Reader) (bin.Int256, error) {
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var buf [bin.Word * 8]byte
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if _, err := io.ReadFull(randSource, buf[:]); err != nil {
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return bin.Int256{}, err
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}
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b := &bin.Buffer{Buf: buf[:]}
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return b.Int256()
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}
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