PresignPostObject adding condition itself

[okankaraduman]

Acknowledgements

• I have searched (https://github.com/aws/aws-sdk/issues?q=is%3Aissue) for past instances of this issue
• I have verified all of my SDK modules are up-to-date (you can perform a bulk update with go get -u github.com/aws/aws-sdk-go-v2/...)

Describe the bug

I am using PresignPostObject method of the PresignClient

and I am setting the conditions as
Conditions: []interface{}{
[]string{"starts-with", "$key", key},
[]string{"eq", "$Content-Type", "application/pdf"},
},
with the key being statement_503383/

Regression Issue

• Select this option if this issue appears to be a regression.

Expected Behavior

Allow the upload the file with the prefix.

Current Behavior

but when I try to upload the file using the payload that PresignPostObject returns and with the key statement_503383/testfile.pdf

api itself gives:

Invalid according to Policy: Policy Condition failed: ["eq", "$key", "statement_50333804/"]
when key is statement_503383/testfile.pdf

I did not set that policy and I couldn't figure out where it is coming from.

Reproduction Steps

input := &s3.PutObjectInput{
Bucket: &bucket,
Key: &key,
}

fmt.Printf("Conditions: %+v\n", options.Conditions)

response, err := a.client.PresignPostObject(ctx, input, func(opts *s3.PresignPostOptions) {
	fmt.Printf("PresignPostObject options before modification: %+v\n", opts)

	opts.Expires = options.Expires
	opts.Conditions = options.Conditions
})
if err != nil {
	return nil, err
}

postRequest := PreSignedPostRequest{
	URL:    response.URL,
	Fields: response.Values,
}

Possible Solution

No response

Additional Information/Context

No response

AWS Go SDK V2 Module Versions Used

github.com/aws/aws-sdk-go-v2 v1.34.0
github.com/aws/aws-sdk-go-v2/service/s3 v1.71.0
github.com/aws/aws-sdk-go-v2/service/sns v1.33.7
github.com/aws/aws-sdk-go-v2/service/sqs v1.37.2

Compiler and Version used

go version go1.23.0 darwin/arm64

Operating System and version

macOS

[okankaraduman]

This is resolved one apparently I do have to send interface :

Conditions: []interface{}{
[]interface{}{"starts-with", "$key", "statement_50333804/"},
},

this is not working:
Conditions: []interface{}{
[]string["starts-with", "$key", "statement_50333804/"],
},
and it was adding both starts-with and eq conditions to the policy:

["starts-with","$key","statement_50333804/"], {key, statement_50333804/}]

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