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[3.10] gh-107077: Raise SSLCertVerificationError even if the error is set via SSL_ERROR_SYSCALL (GH-107586) #107589

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Aug 3, 2023
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[3.10] gh-107077: Raise SSLCertVerificationError even if the error is set via SSL_ERROR_SYSCALL (GH-107586) #107589

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6 changes: 6 additions & 0 deletions Misc/NEWS.d/next/Library/2023-08-03-12-52-19.gh-issue-107077.-pzHD6.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
Seems that in some conditions, OpenSSL will return ``SSL_ERROR_SYSCALL``
instead of ``SSL_ERROR_SSL`` when a certification verification has failed,
but the error parameters will still contain ``ERR_LIB_SSL`` and
``SSL_R_CERTIFICATE_VERIFY_FAILED``. We are now detecting this situation and
raising the appropiate ``ssl.SSLCertVerificationError``. Patch by Pablo
Galindo
4 changes: 4 additions & 0 deletions Modules/_ssl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -656,6 +656,10 @@ PySSL_SetError(PySSLSocket *sslsock, int ret, const char *filename, int lineno)
errstr = "Some I/O error occurred";
}
} else {
if (ERR_GET_LIB(e) == ERR_LIB_SSL &&
ERR_GET_REASON(e) == SSL_R_CERTIFICATE_VERIFY_FAILED) {
type = state->PySSLCertVerificationErrorObject;
}
p = PY_SSL_ERROR_SYSCALL;
}
break;
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