Modules/_ssl/distrusted_spki.h

/* Denylist of distrusted SubjectPublicKeyInfo (SPKI).
 *
 * Verification rejects any chain with a cert whose SPKI SHA-256 digest is in
 * the _distrusted_spki table.  We match the key, not a cert fingerprint, so
 * cross-signs that reuse the key are blocked too.
 *
 * This is an extraordinary measure and last line of defense.  Removing trust is
 * primarily the job of the platform root store. This list only blocks keys while
 * that update is still propagating to the OS, container images, or root CAs
 * bundled in Python packages.  The threshold for adding an entry is very high.
  *
 * See https://github.com/python/cpython/issues/160040 for the eMudhra discussion.
 *
 * To block another key, add the SHA-256 digest bytes of its SPKI:
 *
 *     $ openssl x509 -in cert.pem -noout -pubkey | openssl pkey -pubin -outform DER | openssl dgst -sha256 -binary | xxd -i
 */
#ifndef Py_SSL_DISTRUSTED_SPKI_H
#define Py_SSL_DISTRUSTED_SPKI_H

#include "openssl/sha.h"

static const unsigned char _distrusted_spki[][SHA256_DIGEST_LENGTH] = {
    /* Compromised eMudhra intermediates, https://emudhra.we-have-a-problem.com/ */
    /* CN=EM OV TLS CA - G3B,O=eMudhra BV,C=NL */
    {
        0x43, 0xbf, 0xfa, 0x19, 0xd6, 0xef, 0x65, 0x14, 0x51, 0xf6, 0x84, 0x1e,
        0x01, 0x99, 0x31, 0xe9, 0x6f, 0x6f, 0x2e, 0xae, 0xff, 0x28, 0xab, 0x4b,
        0x6f, 0x1c, 0xe4, 0x57, 0x6d, 0xe2, 0x71, 0x7b,
    },
    /* CN=EM DV TLS CA - G3C,O=eMudhra Inc,C=US */
    {
        0x49, 0xdd, 0x35, 0x3d, 0xc2, 0xb9, 0x19, 0xa3, 0x77, 0x06, 0x45, 0x11,
        0x7d, 0x0e, 0x60, 0xc1, 0x61, 0x15, 0xe7, 0xd1, 0xbc, 0x25, 0x9e, 0xef,
        0xe7, 0x34, 0xb0, 0x0e, 0xa4, 0x34, 0xfe, 0x5f,
    },
    /* CN=EM EV TLS CA - G3C,O=eMudhra Inc,C=US */
    {
        0x5c, 0x06, 0x60, 0xa2, 0xb1, 0x64, 0x91, 0x0d, 0x8f, 0xf5, 0x89, 0xc1,
        0x8e, 0x14, 0x55, 0x2e, 0x9e, 0x0e, 0xc2, 0x37, 0xdc, 0xef, 0xe2, 0xcb,
        0x73, 0x6d, 0x41, 0xa4, 0x81, 0x1f, 0x81, 0xa0,
    },
    /* CN=EM OV TLS CA - G3C,O=eMudhra Inc,C=US */
    {
        0x63, 0xec, 0xef, 0xee, 0x43, 0x1d, 0x49, 0x52, 0x3b, 0xc1, 0x13, 0x6c,
        0x4e, 0x72, 0xd0, 0x20, 0x6a, 0x47, 0x70, 0x86, 0xca, 0xf6, 0x06, 0xcd,
        0x5c, 0xf0, 0x25, 0x68, 0x6c, 0x10, 0x9c, 0xf8,
    },
    /* CN=EM OV CS CA - G3C,O=eMudhra Inc,C=US */
    {
        0x92, 0xc0, 0x63, 0xd6, 0x7e, 0x8f, 0x14, 0xdb, 0x71, 0xd2, 0x88, 0xe1,
        0x12, 0x66, 0xff, 0xda, 0xf6, 0x9c, 0xbf, 0x11, 0x5f, 0x7b, 0xab, 0x14,
        0xf3, 0xbc, 0x2f, 0x68, 0xd2, 0x5e, 0x0e, 0x30,
    },
    /* CN=EM EV TLS CA - G3B,O=eMudhra BV,C=NL */
    {
        0xe0, 0x25, 0x4c, 0x7f, 0xcd, 0xc2, 0x65, 0xe2, 0xf0, 0xf8, 0xa4, 0x28,
        0xda, 0xbb, 0x75, 0xab, 0x4a, 0xe0, 0x39, 0xb4, 0x87, 0x2d, 0x62, 0xf5,
        0xee, 0x57, 0xf0, 0x87, 0x7d, 0x5a, 0x8a, 0x41,
    },
    /* CN=EM DV TLS CA - G3B,O=eMudhra BV,C=NL */
    {
        0xeb, 0xed, 0x64, 0x75, 0xc2, 0xc2, 0xd8, 0x0f, 0xcb, 0x19, 0x9f, 0x3f,
        0xe8, 0xdd, 0x6e, 0x6b, 0x3c, 0xe6, 0x0b, 0x77, 0xeb, 0x15, 0xd4, 0xe4,
        0x2c, 0x3d, 0xec, 0x0c, 0x6f, 0x5b, 0x51, 0x05,
    },
    /* CN=EM OV CS CA - G3B,O=eMudhra BV,C=NL */
    {
        0xec, 0x4f, 0xfa, 0x1a, 0xd0, 0xac, 0x88, 0x08, 0x13, 0x14, 0xb7, 0xaa,
        0xff, 0xef, 0x6a, 0x91, 0xf9, 0x7c, 0xd5, 0x72, 0x91, 0xbb, 0x5b, 0xa6,
        0x86, 0xc5, 0x41, 0x5f, 0x5e, 0xb4, 0xf6, 0xb6,
    },
};

#endif /* !Py_SSL_DISTRUSTED_SPKI_H */