crypto.generatePrime(size[, options[, callback]])

• size <number> 要生成的素数的大小（以位为单位）。
• options <Object>
  • add <ArrayBuffer> | <SharedArrayBuffer> | <TypedArray> | <Buffer> | <DataView> | <bigint>
  • rem <ArrayBuffer> | <SharedArrayBuffer> | <TypedArray> | <Buffer> | <DataView> | <bigint>
  • safe <boolean> 默认值: false。
  • bigint <boolean> 当 true 时，生成的素数作为 bigint 返回。
• callback <Function>
  • err <Error>
  • prime <ArrayBuffer> | <bigint>

生成 size 位的伪随机素数。

如果 options.safe 是 true，素数将是一个安全素数——也就是说，(prime - 1) / 2 也将是素数。

options.add 和 options.rem 参数可用于强制执行其他要求，例如，对于 Diffie-Hellman：

• 如果 options.add 和 options.rem 都设置，素数将满足条件 prime % add = rem。
• 如果只设置了 options.add 而 options.safe 不是 true，素数将满足条件 prime % add = 1。
• 如果只设置了 options.add，而将 options.safe 设置为 true，则素数将满足条件 prime % add = 3。 这是必要的，因为 options.add > 2 的 prime % add = 1 会与 options.safe 强制执行的条件相矛盾。
• 如果未给出 options.add，则忽略 options.rem。

如果以 ArrayBuffer、SharedArrayBuffer、TypedArray、Buffer 或 DataView 形式给出，则 options.add 和 options.rem 都必须编码为大端序列。

默认情况下，素数被编码为 <ArrayBuffer> 中八位字节的大端序列。 如果 bigint 选项为 true，则提供 <bigint>。

• size <number> The size (in bits) of the prime to generate.
• options <Object>
  • add <ArrayBuffer> | <SharedArrayBuffer> | <TypedArray> | <Buffer> | <DataView> | <bigint>
  • rem <ArrayBuffer> | <SharedArrayBuffer> | <TypedArray> | <Buffer> | <DataView> | <bigint>
  • safe <boolean> Default: false.
  • bigint <boolean> When true, the generated prime is returned as a bigint.
• callback <Function>
  • err <Error>
  • prime <ArrayBuffer> | <bigint>

Generates a pseudorandom prime of size bits.

If options.safe is true, the prime will be a safe prime -- that is, (prime - 1) / 2 will also be a prime.

The options.add and options.rem parameters can be used to enforce additional requirements, e.g., for Diffie-Hellman:

• If options.add and options.rem are both set, the prime will satisfy the condition that prime % add = rem.
• If only options.add is set and options.safe is not true, the prime will satisfy the condition that prime % add = 1.
• If only options.add is set and options.safe is set to true, the prime will instead satisfy the condition that prime % add = 3. This is necessary because prime % add = 1 for options.add > 2 would contradict the condition enforced by options.safe.
• options.rem is ignored if options.add is not given.

Both options.add and options.rem must be encoded as big-endian sequences if given as an ArrayBuffer, SharedArrayBuffer, TypedArray, Buffer, or DataView.

By default, the prime is encoded as a big-endian sequence of octets in an <ArrayBuffer>. If the bigint option is true, then a <bigint> is provided.