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MakKi (makki_d)
f7fd5cf2d8
* runtime: use rand_hwrng hardwareRand for RP2040/RP2350 * add a comment * insert 'implementations'
22 lines
821 B
Go
22 lines
821 B
Go
//go:build baremetal && (nrf || (stm32 && !(stm32f103 || stm32l0x1)) || (sam && atsamd51) || (sam && atsame5x) || esp32c3 || tkey || (tinygo.riscv32 && virt) || rp2040 || rp2350)
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// If you update the above build constraint, you'll probably also need to update
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// src/crypto/rand/rand_baremetal.go.
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//
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// The rp2040 and rp2350 implementations are not included in src/crypto/rand/rand_baremetal.go
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// due to not being sufficiently random for the Go crypto libs.
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// However since the randomness here does not provide those same guarantees,
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// they are included in the list for hardwareRand() implementations.
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package runtime
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import "machine"
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func hardwareRand() (n uint64, ok bool) {
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n1, err1 := machine.GetRNG()
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n2, err2 := machine.GetRNG()
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n = uint64(n1)<<32 | uint64(n2)
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ok = err1 == nil && err2 == nil
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return
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}
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