如何在 jwks_uri 端点中 return RSA 密钥以进行 OpenID 连接发现

Question

在 OpenID Connect 提供商的发现部分工作，我对如何正确 return 我的 public 键。我的问题特别针对 modulus (n) 和 exponent (e) 值。

两者的初始值为：

n = 124692971944797177402996703053303877641609106436730124136075828918287037758927191447826707233876916396730936365584704201525802806009892366608834910101419219957891196104538322266555160652329444921468362525907130134965311064068870381940624996449410632960760491317833379253431879193412822078872504618021680609253

e = 65537

所以，我阅读 here 的理解，只需要对两者进行 base64url 编码。

（Python中的例子）

n = urlsafe_b64encode(str(n))
e = urlsafe_b64encode(str(e))

n = "MTI0NjkyOTcxOTQ0Nzk3MTc3NDAyOTk2NzAzMDUzMzAzODc3NjQxNjA5MTA2NDM2NzMwMTI0MTM2MDc1ODI4OTE4Mjg3MDM3NzU4OTI3MTkxNDQ3ODI2NzA3MjMzODc2OTE2Mzk2NzMwOTM2MzY1NTg0NzA0MjAxNTI1ODAyODA2MDA5ODkyMzY2NjA4ODM0OTEwMTAxNDE5MjE5OTU3ODkxMTk2MTA0NTM4MzIyMjY2NTU1MTYwNjUyMzI5NDQ0OTIxNDY4MzYyNTI1OTA3MTMwMTM0OTY1MzExMDY0MDY4ODcwMzgxOTQwNjI0OTk2NDQ5NDEwNjMyOTYwNzYwNDkxMzE3ODMzMzc5MjUzNDMxODc5MTkzNDEyODIyMDc4ODcyNTA0NjE4MDIxNjgwNjA5MjUz"
e = "NjU1Mzc="

我哪里错了？因为，例如，google keys 有不同的编码。

（Google 键值）

n = "rl1iVsRbhod-gDJj2SDs94lk5iY0QYXV5HIPtjcx4KmIlmq-cdmfLteTeIHFsO5c6hKUt8R3uZzaQNgF3fKt700fT4m6tU23qK4EoLlx9Z_uSajtpMajdmX_FOdyHyQgcn0tj3YqPeYCOTBhRVNoLIenf9vy0hfFy71lcPhylnE",
e = "AQAB"

我错过了什么吗？感谢您的宝贵时间。

PD: The project I'm working on.

Answer 1

您正在对值的十进制表示进行 base64url 编码，但您应该对八位字节值进行 base64url 编码，即此处定义的大端字节序列：https://www.rfc-editor.org/rfc/rfc7518#section-6.3.1.1 and here https://www.rfc-editor.org/rfc/rfc7518#section-2

Base64urlUInt

The representation of a positive or zero integer value as the base64url encoding of the value's unsigned big-endian representation as an octet sequence. The octet sequence MUST utilize the minimum number of octets needed to represent the value. Zero is represented as BASE64URL(single zero-valued octet), which is "AA".

Answer 2

def get_bytes_length(n):
    """ref: https://docs.python.org/3/library/stdtypes.html#int.to_bytes"""
    return ((n).bit_length() + 7) // 8

def b64_enc(n, l):
    n = n.to_bytes(l, 'big')
    return base64.b64encode(n)

>>> b64_enc(65537, get_bytes_length(65537))
>>> b'AQAB'

如何在 jwks_uri 端点中 return RSA 密钥以进行 OpenID 连接发现

How to return RSA key in jwks_uri endpoint for OpenID Connect Discovery

python

google-oauth

jwt

openid-connect

openid-provider