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be more conservative when parsing rtp content

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This commit is contained in:
Daniel Gultsch 2020-04-12 08:32:34 +02:00
parent deaa76b5ca
commit 82f9a77777
2 changed files with 32 additions and 3 deletions
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20
src/main/java/eu/siacs/conversations/xmpp/jingle/SessionDescription.java
View file

@ -3,6 +3,7 @@ package eu.siacs.conversations.xmpp.jingle;
import android.util.Log;
import android.util.Pair;
import com.google.common.base.CharMatcher;
import com.google.common.base.Joiner;
import com.google.common.base.Strings;
import com.google.common.collect.ArrayListMultimap;
@ -131,6 +132,8 @@ public class SessionDescription {
final ImmutableList.Builder<Media> mediaListBuilder = new ImmutableList.Builder<>();
final Group group = contentMap.group;
if (group != null) {
final String semantics = group.getSemantics();
checkNoWhitespace(semantics, "group semantics value must not contain any whitespace");
attributeMap.put("group", group.getSemantics() + " " + Joiner.on(' ').join(group.getIdentificationTags()));
}
@ -150,9 +153,11 @@ public class SessionDescription {
if (!Strings.isNullOrEmpty(ufrag)) {
mediaAttributes.put("ice-ufrag", ufrag);
}
checkNoWhitespace(ufrag, "ufrag value must not contain any whitespaces");
if (!Strings.isNullOrEmpty(pwd)) {
mediaAttributes.put("ice-pwd", pwd);
}
checkNoWhitespace(pwd, "pwd value must not contain any whitespaces");
mediaAttributes.put("ice-options", HARDCODED_ICE_OPTIONS);
final IceUdpTransportInfo.Fingerprint fingerprint = transport.getFingerprint();
if (fingerprint != null) {
@ -180,6 +185,7 @@ public class SessionDescription {
if (Strings.isNullOrEmpty(type)) {
throw new IllegalArgumentException("a feedback for payload-type " + id + " negotiation is missing type");
}
checkNoWhitespace(type, "feedback negotiation type must not contain whitespace");
mediaAttributes.put("rtcp-fb", id + " " + type + (Strings.isNullOrEmpty(subtype) ? "" : " " + subtype));
}
for (RtpDescription.FeedbackNegotiationTrrInt feedbackNegotiationTrrInt : payloadType.feedbackNegotiationTrrInts()) {
@ -193,6 +199,7 @@ public class SessionDescription {
if (Strings.isNullOrEmpty(type)) {
throw new IllegalArgumentException("a feedback negotiation is missing type");
}
checkNoWhitespace(type, "feedback negotiation type must not contain whitespace");
mediaAttributes.put("rtcp-fb", "* " + type + (Strings.isNullOrEmpty(subtype) ? "" : " " + subtype));
}
for (RtpDescription.FeedbackNegotiationTrrInt feedbackNegotiationTrrInt : description.feedbackNegotiationTrrInts()) {
@ -204,9 +211,11 @@ public class SessionDescription {
if (Strings.isNullOrEmpty(id)) {
throw new IllegalArgumentException("A header extension is missing id");
}
checkNoWhitespace(id, "header extension id must not contain whitespace");
if (Strings.isNullOrEmpty(uri)) {
throw new IllegalArgumentException("A header extension is missing uri");
}
checkNoWhitespace(uri, "feedback negotiation uri must not contain whitespace");
mediaAttributes.put("extmap", id + " " + uri);
}
for (RtpDescription.SourceGroup sourceGroup : description.getSourceGroups()) {
@ -215,6 +224,7 @@ public class SessionDescription {
if (Strings.isNullOrEmpty(semantics)) {
throw new IllegalArgumentException("A SSRC group is missing semantics attribute");
}
checkNoWhitespace(semantics, "source group semantics must not contain whitespace");
if (groups.size() == 0) {
throw new IllegalArgumentException("A SSRC group is missing SSRC ids");
}
@ -228,13 +238,14 @@ public class SessionDescription {
if (Strings.isNullOrEmpty(id)) {
throw new IllegalArgumentException("A source specific media attribute is missing the id");
}
checkNoWhitespace(id, "A source specific media attributes must not contain whitespaces");
if (Strings.isNullOrEmpty(parameterName)) {
throw new IllegalArgumentException("A source specific media attribute is missing its name");
}
if (Strings.isNullOrEmpty(parameterValue)) {
throw new IllegalArgumentException("A source specific media attribute is missing its value");
}
mediaAttributes.put("ssrc", id + " " + parameter.getParameterName() + ":" + parameter.getParameterValue());
mediaAttributes.put("ssrc", id + " " + parameterName + ":" + parameterValue);
}
}
@ -263,6 +274,13 @@ public class SessionDescription {
return sessionDescriptionBuilder.createSessionDescription();
}
public static String checkNoWhitespace(final String input, final String message) {
if (CharMatcher.whitespace().matchesAnyOf(input)) {
throw new IllegalArgumentException(message);
}
return input;
}
public static int ignorantIntParser(final String input) {
try {
return Integer.parseInt(input);

15
src/main/java/eu/siacs/conversations/xmpp/jingle/stanzas/RtpDescription.java
View file

@ -232,7 +232,10 @@ public class RtpDescription extends GenericDescription {
public String toSdpAttribute() {
final int channels = getChannels();
return getId()+" "+getPayloadTypeName()+"/"+getClockRate()+(channels == 1 ? "" : "/"+channels);
final String name = getPayloadTypeName();
Preconditions.checkArgument(name != null, "Payload-type name must not be empty");
SessionDescription.checkNoWhitespace(name, "payload-type name must not contain whitespaces");
return getId()+" "+name+"/"+getClockRate()+(channels == 1 ? "" : "/"+channels);
}
public int getIntId() {
@ -367,7 +370,15 @@ public class RtpDescription extends GenericDescription {
stringBuilder.append(id).append(' ');
for(int i = 0; i < parameters.size(); ++i) {
Parameter p = parameters.get(i);
stringBuilder.append(p.getParameterName()).append('=').append(p.getParameterValue());
final String name = p.getParameterName();
Preconditions.checkArgument(name != null, String.format("parameter for %s must have a name", id));
SessionDescription.checkNoWhitespace(name, String.format("parameter names for %s must not contain whitespaces", id));
final String value = p.getParameterValue();
Preconditions.checkArgument(value != null, String.format("parameter for %s must have a value", id));
SessionDescription.checkNoWhitespace(value, String.format("parameter values for %s must not contain whitespaces", id));
stringBuilder.append(name).append('=').append(value);
if (i != parameters.size() - 1) {
stringBuilder.append(';');
}